No riparian habitat or any other sensitive natural communities occur within the project site. As such, there are no issues regarding direct or indirect impacts to these communities because the project will be limited to disturbed and developed habitat (Figure 4). No impacts to sensitive communities would occur.
5.3 Jurisdictional Wetlands
The proposed project would have a significant effect on biological resources if it would:
c) Have a substantial adverse effect on state or federally protected wetlands (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means.
There are no State or federally protected wetlands present within the project footprint or Study Area. No impacts to protected wetlands would occur.
5.4 Wildlife Movement
The proposed project would have a significant effect on biological resources if it would:
d) Interfere substantially with the movement of any resident or migratory fish or wildlife species or with established resident or migratory wildlife corridors, or impede the use of wildlife nursery sites.
The proposed project activities are restricted to a 17.19-acre lot and include mostly disturbed habitat. The project site is surrounded by Highway 74 to the north and residential and commercial properties to the north, south, and west. The project site is not located within any MSHCP linkages or other established movement corridors. Furthermore, the habitat in the project site does not support migratory fish species nor does it support wildlife nursery sites. As such, there would be no impact to established resident or migratory wildlife corridors, or wildlife nursery sites.
5.5 Resources Protected by Local Policies and
Ordinances
The proposed project would have a significant effect on biological resources if it would:
e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 313
Menifee Mayor and City Council
July 15, 2026
Page
943 of 3153
City of Menifee
Trumble and Watson Warehouse Project
22 The only local policies or ordinances applicable to project site are the City’s tree protection policies.
No protected trees were observed during the field surveys. No additional permits or compliance measures are required, and no impact would occur.
5.6 Habitat Conservation Plans
f) Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation plan?
5.6.1 MSHCP Requirements
The proposed project is located within the boundaries of the MSHCP, and the City as the CEQA lead agency is also a Permittee to the MSHCP. As such, with their discretionary authority over the project, the City can also convey MSHCP take coverage to the project if needed, consistent with the MSHCP. Refer to Section 4.6 above for the details that demonstrate the project’s consistency with the MSHCP. In addition, payment of MSHCP mitigation fees is required. Payment of fees, as well as compliance with the requirements of Section 6.0 of the MSHCP, is intended to provide full mitigation under CEQA, the National Environmental Policy Act (NEPA), CESA, and ESA for impacts to special-status species and protected habitats covered by the MSHCP, pursuant to agreements with the USFWS and the CDFW, and set forth in the implementing agreement for the MSHCP.
5.6.2 Stephens’ Kangaroo Rat Habitat Conservation Plan
The proposed project is located within the Stephens’ Kangaroo Rat Habitat Conservation Plan Area and is subject to the plan’s associated mitigation fees. No Stephens’ kangaroo rat conservation measures are required by the proposed project as this species is now considered fully conserved under the Stephens’ Kangaroo Rat Habitat Conservation Plan. Therefore, with payment of fees, the proposed project will not conflict with the Stephens’ Kangaroo Rat Habitat Conservation Plan.
5.7 Mitigation Measures
The following MMs shall be incorporated into the project design to the maximum extent feasible to avoid, minimize, and/or mitigate impacts to special-status species and other sensitive biological resources. With the implementation of the following measures, impacts to biological resources would be less than significant.
MM BIO-1 Direct and Indirect Impacts During Construction ▪ Consistent with the Best Management Practices from MSHCP Volume 1, Attachment C, the following shall be implemented to avoid direct and indirect impacts during construction:
Limiting grading to the minimum area necessary for construction, operation, and decommissioning of the project
Limiting vegetation disturbance/removal to the maximum extent practicable Implementing fiber rolls and sandbags around drainage areas and the site perimeter Stockpiling and disposing of demolition debris, concrete, and soil properly Installation of a stabilized construction entrance/exit and stabilization of disturbed areas Proper protections for fueling and maintenance of equipment and vehicles □
□
□
□
□
□
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 314
Menifee Mayor and City Council
July 15, 2026
Page
944 of 3153
Impact Analysis and Mitigation Measures
Habitat Assessment and MSHCP Consistency Analysis 23
Managing waste, aggressively controlling litter, and implementing sediment controls Soil stabilization in disturbed areas by revegetation
▪ Minimize Spills of Hazardous Materials. All vehicles and equipment shall be maintained in proper condition to minimize the potential for fugitive emissions of motor oil, antifreeze, hydraulic fluid, grease, or other hazardous materials. Hazardous spills and contaminated soil shall be immediately cleaned up and the contaminated soil shall be properly handled or disposed of at a licensed facility. Servicing of construction equipment shall take place only at a designated staging area.
▪ Invasive Plant Species Control. Invasive plant species, for the purpose of this document, shall include all species with a California Invasive Plant Council (Cal-IPC) rating of limited, moderate, or high. Construction personnel and equipment shall be free of invasive plant seeds, propagules, and any material which may contain them (e.g., soil) prior to entering the project site. All potentially contaminated equipment will be carefully cleaned prior to the initiation of project activities. Staging areas and temporary work areas shall avoid weed infestations and infestations within the work area(s) shall be flagged and avoided to the maximum extent feasible. Only certified weed-free materials (e.g., gravel, straw, and fill) will be used for the project. ▪ Removal of Native Vegetation. The removal of native vegetation shall be avoided and minimized to the maximum extent practicable. Temporary impacts shall be returned to pre- existing contours and revegetated with appropriate native species. ▪ Standard Dust Control Measures. Standard dust control measures as per the South Coast Air Quality Management District shall be implemented to reduce dust impacts on nearby conserved lands, plants, and wildlife. Measures include controlling speed to 15 mph or less on unpaved roads, replacing ground cover in disturbed areas as quickly as possible, frequently watering active work sites, installation of shaker plates, and suspending excavation and grading operations during periods of high winds.
▪ Wildlife Hazards. The following measures shall be implemented to ensure that wildlife do not become trapped, entangled, injured, or poisoned by construction activities:
Structures in which wildlife may become trapped (e.g., open pipes, pits, trenches, etc.) shall be tightly covered at the end of each work day. If covering the structure is not possible, an escape ramp shall be provided to allow any wildlife that falls in to safely escape.
Debris piles, construction materials, equipment, and other items that may be used as wildlife refuge shall be inspected for wildlife at the start of each work day and prior to disturbance. If wildlife is discovered, it shall either be moved out of harm’s way by a qualified biologist or allowed to move off of the study area on its own.
Nets and mesh shall be made of loose-weave material that is not fused at the intersections of the weave, as nets with welded weaves present an entanglement risk.
Toxic materials and garbage shall be removed from the work site and safely stored or disposed of at the end of each workday.
MM BIO-2 Worker Environmental Awareness Plan Training
Prior to the initiation of the project, an approved biologist shall present Worker Environmental Awareness Plan training (WEAP) to all on-site personnel. The WEAP will educate the personnel on the identification of special-status species and regulated biological resources that are present or have the potential to occur within the project site, will cover the applicable regulatory policies and provisions regarding their protection, and will provide an overview of the project’s avoidance, □
□
□
□
□
□
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 315
Menifee Mayor and City Council
July 15, 2026
Page
945 of 3153
City of Menifee
Trumble and Watson Warehouse Project
24 minimization, and mitigation measures. Furthermore, on-site personnel will be briefed on the reporting process if an inadvertent injury or mortality should occur to a special-status species during construction or operations.
MM BIO-3 Pre-construction Nesting Bird Surveys
To avoid disturbance of nesting birds, including special-status bird species and birds protected by the Migratory Bird Species Act (MBTA) and California Fish and Game Code (CFGC Section 3503), project activities shall occur outside of the breeding season for nesting birds (generally February 1 through August 31), if feasible.
If construction occurs during the breeding season, then a pre-construction nesting bird survey shall be conducted no more than seven days prior to the initiation of project activities. If more than one phase of grading occurs during nesting season, the pre-construction nesting bird survey shall be repeated. The nesting bird survey shall be conducted on foot inside the project site and include a 500-foot buffer for raptors and special status bird species and a 100-foot buffer for all other bird species. The survey shall be conducted by a biologist familiar with avian species known to inhabit Southern California. If nests are found, an avoidance buffer of up to 500 feet for raptors and special- status species and up to 100 feet for non-raptors (dependent upon the species, the proposed work activity, and existing disturbances associated with land use outside of the workspace) shall be determined and demarcated by the biologist with construction fencing, flagging, or other means to mark the boundary. The buffer shall be maintained and nest avoided until the young have fledged and/or the nest is no longer active.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 316
Menifee Mayor and City Council
July 15, 2026
Page
946 of 3153
References
Habitat Assessment and MSHCP Consistency Analysis 25
6 References
California Department of Fish and Wildlife (CDFW). 2025a. California Natural Diversity Database (CNDDB), Rarefind V. Accessed January 2025.
_____. 2025b. Biogeographic Information and Observation System (BIOS). Available at:
www.wildlife.ca.gov/data/BIOS. Accessed January 2025.
_____. 2025c. Special Animals List. Accessed January 2025. _____. 2025d. Special Vascular Plants, Bryophytes, and Lichens List. Accessed January 2025.
California Invasive Plant Council (Cal-IPC). 2025. The Cal-IPC Inventory. Available at:
https://www.cal-ipc.org/. Accessed January 2025.
California Native Plant Society (CNPS), Rare Plant Program. 2025. Rare Plant Inventory (v9.5).
Available at: www.rareplants.cnps.org. Accessed January 2025.
County of Riverside. 2003. Western Riverside County Multiple Species Habitat Conservation Plan.
Riverside, California. County of Riverside, Transportation and Land Management Agency, Riverside County Integrated Project. MSHCP adopted June 17, 2003. Accessed 2025. http://www.rctlma.org/mshcp
Google Earth. 2025. Available at: https://www.google.com/earth/. Accessed January 2025.
National Oceanic and Atmospheric Administration (NOAA). 2025. NOAA Air Resources Laboratory.
Available at: https://www.ready.noaa.gov/READYcmet.php. Accessed January 2025.
Regional Conservation Authority (RCA). 2025. Western Riverside County Multiple Species Habitat Conservation Plan Annual Report. Report. Available at: https://www.wrc-rca.org/document- library/annual-reports/
Sawyer, J. O., T. Keeler-Wolf, and J.M. Evens. 2009. A Manual of California Vegetation, Online Edition. California Native Plant Society, Sacramento, California. Available at:
http://www.cnps.org/cnps/vegetation/. Accessed January 2025.
Spencer et al. 2010. California Essential Habitat Connectivity Project: A Strategy for Conserving a Connected California. Available at:
https://conservationcorridor.org/cpb/Spencer_et_al_2010.pdf. Accessed January 2025.
United States Department of Agriculture, Natural Resources Conservation Service (USDA NRCS). 2025a. Web Soils Survey: Custom Area of Interest in the Lake Elsinore Quadrangles.
Available at: https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm. Accessed January 2025.
United States Fish and Wildlife Service (USFWS). 2025a. Critical Habitat Portal. Available at:
https://ecos.fws.gov/ecp/report/table/critical-habitat.html. Accessed January 2025. _____. 2025b. National Wetlands Inventory (NWI). Available at:
https://www.fws.gov/wetlands/data/mapper.html. Accessed January 2025.
United States Geological Survey (USGS). 2025. 7.5-minute topographic quadrangles. Available at:
https://apps.nationalmap.gov/viewer/. Accessed January 2025.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 317
Menifee Mayor and City Council
July 15, 2026
Page
947 of 3153
City of Menifee
Trumble and Watson Warehouse Project
26 University of California, Berkeley. 2025. The Jepson Herbarium. Available at:
http://ucjeps.berkeley.edu/interchange. Accessed January 2025.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 318
Menifee Mayor and City Council
July 15, 2026
Page
948 of 3153
Certification and List of Preparers
Habitat Assessment and MSHCP Consistency Analysis 27
7 Certification and List of Preparers
I hereby certify that the statements furnished above and in the attached exhibits present data and information required for this biological evaluation, and that the facts, statements, and information presented are true and correct to the best of my knowledge and belief.
Date: February 11, 2025 Signed:
Jared Reed, Senior Biologist/Project Manager
Rincon Consultants, Inc.
Primary Authors
▪ Nick Julier, Biologist
▪ Nicholas Fager, Biologist
Technical Review
▪ Wendy Worthey, Principal
▪ Jared Reed, Senior Biologist/Project Manager
▪ Andrea Maben, Senior Biologist/Project Manager
Graphics
▪ Abby Robles, GIS Analyst
Field Reconnaissance Survey
▪ Nick Julier, Biologist
(
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 319
Menifee Mayor and City Council
July 15, 2026
Page
949 of 3153
City of Menifee
Trumble and Watson Warehouse Project
28 This page intentionally left blank.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 320
Menifee Mayor and City Council
July 15, 2026
Page
950 of 3153
Appendix A
Site Photographs
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 321
Menifee Mayor and City Council
July 15, 2026
Page
951 of 3153
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 322
Menifee Mayor and City Council
July 15, 2026
Page
952 of 3153
Site Photographs
Habitat Assessment and MSHCP Consistency Analysis A-1
Photograph 1. View from northwest corner looking southeast within project site.
Photograph 2. View looking south of disturbed habitat adjacent to Trumble Road within the project site.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 323
Menifee Mayor and City Council
July 15, 2026
Page
953 of 3153
City of Menifee
Trumble and Watson Warehouse Project
A-2
Photograph 3. View from southwest corner within project site looking northeast.
Photograph 4. View looking northeast from south side of the project site.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 324
Menifee Mayor and City Council
July 15, 2026
Page
954 of 3153
Site Photographs
Habitat Assessment and MSHCP Consistency Analysis A-3
Photograph 5. View looking east, adjacent to the small neighborhood and showing disturbed habitat within the south end of the project site.
Photograph 6. Overview from the southeast end of project site.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 325
Menifee Mayor and City Council
July 15, 2026
Page
955 of 3153
City of Menifee
Trumble and Watson Warehouse Project
A-4
Photograph 7. View looking north within the eastern boundary of project site towards Highway 74.
Photograph 8. Overview of project site looking southwest from eastern boundary.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 326
Menifee Mayor and City Council
July 15, 2026
Page
956 of 3153
Site Photographs
Habitat Assessment and MSHCP Consistency Analysis A-5
Photograph 9. View looking southwest from northern boundary of project site.
Photograph 10. View looking west towards project site showing disturbed habitat.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 327
Menifee Mayor and City Council
July 15, 2026
Page
957 of 3153
City of Menifee
Trumble and Watson Warehouse Project
A-6
This page intentionally left blank.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 328
Menifee Mayor and City Council
July 15, 2026
Page
958 of 3153
Appendix B
Observed Plant Species Lists
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 329
Menifee Mayor and City Council
July 15, 2026
Page
959 of 3153
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 330
Menifee Mayor and City Council
July 15, 2026
Page
960 of 3153
Observed Plant Species Lists
Habitat Assessment and MSHCP Consistency Analysis B-1
Observed Plant Species List
Scientific Name Common Name
Native/Introduced/
Invasive Rating1
Wetland
Indicator Status
Life Form (e.g.,
Tree, Shrub,
Herbaceous)
Bromus tectorum cheat grasses Introduced; Cal-IPC Limited to Moderate
– Herb
Centaurea melitensis Maltese start-thistle Introduced – Herb Eucalyptus globulus blue gum Introduced; Cal-IPC Limited NL Tree Helianthus gracilentus slender sunflower Native OBL Herb Heliotropium
curassavicum
Alkali heliotrope Native NL Herb
Hirschfeldia incana short-pod mustard Introduced; Cal-IPC Moderate
NL Herb
Oncosiphon pilulifer stinknet Introduced; Cal-IPC High FACU Herb Platanus occidentalis American sycamore Native NL Tree
Salsola tragus Russian thistle Introduced; Cal-IPC Limited FACU Shrub Schinus molle Peruvian peppertree Introduced; Cal-IPC Limited FACU Tree Washingtonia robusta Mexican fan palm Native NL Tree
1 Cal-IPC – California Invasive Plant Council (Cal-IPC 2024) Invasive Rating
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 331
Menifee Mayor and City Council
July 15, 2026
Page
961 of 3153
City of Menifee
Trumble and Watson Warehouse Project
B-2
This page intentionally left blank.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 332
Menifee Mayor and City Council
July 15, 2026
Page
962 of 3153
Appendix C
Observed Wildlife Species List
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 333
Menifee Mayor and City Council
July 15, 2026
Page
963 of 3153
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 334
Menifee Mayor and City Council
July 15, 2026
Page
964 of 3153
Observed Wildlife Species List
Habitat Assessment and MSHCP Consistency Analysis C-1
Scientific Name Common Name Status Native or Introduced Birds
Agelaius phoeniceus red-winged blackbird – Native
Anthus rubescens American pipit – Native
Buteo jamaicensis red-tailed hawk – Native
Charadrius vociferus killdeer – Native
Corvus brachyrhynchos American crow – Native
Columba livia rock pigeon – Native
Mimus polyglottos northern mockingbird – Native
Passer domesticus house sparrow – Native
Passerculus sandwichensis savannah sparrow – Native
Sayornis nigricans black phoebe – Native
Setophaga coronata yellow-rumped warbler – Native
Spinus psaltria lesser goldfinch – Native
Zenaida macroura mourning dove – Native
Zonotrichia leucophrys white-crowned sparrow – Native
Status (Federal/State)
SE = State Endangered
FE = Federal Endangered
SSC = Species of Special Concern
CESA = Protected Under California Endangered Species Act FCS: Federal Candidate Species
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 335
Menifee Mayor and City Council
July 15, 2026
Page
965 of 3153
City of Menifee
Trumble and Watson Warehouse Project
C-2
This page intentionally left blank.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 336
Menifee Mayor and City Council
July 15, 2026
Page
966 of 3153
Appendix D
Regulatory Background
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 337
Menifee Mayor and City Council
July 15, 2026
Page
967 of 3153
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 338
Menifee Mayor and City Council
July 15, 2026
Page
968 of 3153
Regulatory Background
Habitat Assessment and MSHCP Consistency Analysis D-1
Regulatory Background
Special-status species are native species that have been afforded special legal or management protection because of concern for their continued existence. There are several categories of protection at both federal and State levels, depending on the magnitude of the threat to continued existence and existing knowledge of population levels.
Federal Endangered Species Act
The United States Fish and Wildlife Service (USFWS) administers the federal Endangered Species Act (ESA) that provides a process for listing species as either threatened or endangered, and the methods of protecting listed species. The ESA defines as “endangered” any plant or animal species that is in danger of extinction throughout all or a significant portion of its range. A “threatened” species is a species that is likely to become endangered in the near future. A “proposed” species is one that has been officially proposed by USFWS for addition to the federal threatened and endangered species list.
Section 9 of the ESA prohibits “take” of threatened or endangered species. The term “take” means to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect, or to attempt to engage in such conduct. The presence of any federally threatened or endangered species that are in a project site generally imposes severe constraints on development, particularly if development would result in “take” of the species or its habitat. Under the regulations of the ESA, the USFWS may authorize “take” when it is incidental to, but not the purpose of, an otherwise lawful act.
California Endangered Species Act
The California Department of Fish and Wildlife (CDFW) administers the California Endangered Species Act (CESA). The State of California considers an endangered species as one whose prospects of survival and reproduction are in immediate jeopardy. A threatened species is considered as one present in such small numbers throughout its range that it is likely to become an endangered species in the near future in the absence of special protection or management. A rare species is one that is considered present in such small numbers throughout its range that it may become endangered if its present environment worsens. State threatened and endangered species are fully protected against take, as defined above.
Section 3503 and 3511 of California Fish and Game Code
The CDFW administers the California Fish and Game Code. There are particular sections of the Code that are applicable to natural resource management. For example, Section 3503 of the Code states it is unlawful to take, possess, or needlessly destroy the nest or eggs of any bird. Section 3511 of the Code lists fully protected bird species, where the CDFW is unable to authorize the issuance of permits or licenses for take of these species. Pertinent species that are fully protected by the State include golden eagle (Aquila chrysaetos) and white-tailed kite (Elanus leucurus).
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 339
Menifee Mayor and City Council
July 15, 2026
Page
969 of 3153
City of Menifee
Trumble and Watson Warehouse Project
D-2
Migratory Bird Treaty Act
The Migratory Bird Treaty Act (MBTA) makes it unlawful to pursue, capture, kill, or possess or attempt to do the same to any migratory bird or part, nest, or egg of any such bird listed in wildlife protection treaties between the United States, Great Britain, Mexico, Japan, and the countries of the former Soviet Union.
Western Riverside County Multiple Species Habitat
Conservation Plan
The Western Riverside County Multiple Species Habitat Conservation Plan (MSHCP) is a comprehensive, multi-jurisdictional Habitat Conservation Plan (HCP) focusing on conservation of species and their associated habitats in western Riverside County. The goal of the MSHCP is to maintain biological and ecological diversity within a rapidly urbanizing region.
The approval of the MSHCP and execution of the Implementing Agreement (IA) by the wildlife agencies allows signatories of the IA to issue “take” authorizations for all species covered by the MSHCP, including State- and federal-listed species as well as other identified sensitive species and/or their habitats, if a project has first been determined consistent with the MSHCP.
Each city or local jurisdiction will impose a Development Mitigation Fee for projects within their jurisdiction. With payment of the mitigation fee to the County and consistency with the survey requirements of the MSHCP where required, full mitigation in compliance with the California Environmental Quality Act (CEQA), National Environmental Policy Act (NEPA), CESA, and ESA will be granted. The Development Mitigation Fee varies according to project size and project description.
The fee for commercial development is currently $6,597 per acre (http://www.wrc- rca.org/Fees/MSHCP%20Fee%20Schedule%20FY%202015.pdf). Payment of the mitigation fee and compliance with the requirements of Section 6.0 of the MSHCP are intended to provide full mitigation under CEQA, NEPA, CESA, and ESA for impacts to the species and habitats covered by the MSHCP pursuant to agreements with the USFWS, the CDFW, and/or any other appropriate participating regulatory agencies and as set forth in the IA for the MSHCP.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 340
Menifee Mayor and City Council
July 15, 2026
Page
970 of 3153
Appendix E
Special-Status Wildlife Species in the Regional Vicinity of the Project Site
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 341
Menifee Mayor and City Council
July 15, 2026
Page
971 of 3153
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 342
Menifee Mayor and City Council
July 15, 2026
Page
972 of 3153
Special-Status Wildlife Species in the Regional Vicinity of the Project Site
Habitat Assessment and MSHCP Consistency Analysis E-1
Special-Status Wildlife Species in the Regional Vicinity of the Project Site Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Plants and Lichens
Abronia villosa var. aurita
chaparral sand-verbena
None/None
G5T2?/S2
1B.1
Annual herb. Chaparral, coastal scrub, desert dunes. Sandy. Elevations: 245-5250ft. (75-1600m.) Blooms (Jan)Mar-Sep.
No potential Coastal scrub and sandy soils are not present in the Study Area. There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Allium marvinii
Yucaipa onion
None/None
G1/S1
1B.2
MSHCP
Perennial bulbiferous herb. Chaparral. In openings on clay soils. Elevations: 2495-3495ft. (760-1065m.) Blooms Apr-May.
No potential Species occurs outside of the elevation range of the Study Area.
Allium munzii
Munz's onion
FE/ST
G1/S1
1B.1
MSHCP
Perennial bulbiferous herb. Chaparral, cismontane woodland, coastal scrub, pinyon and juniper woodland, valley and foothill grassland. Clay, mesic. Elevations: 975-3510ft. (297-1070m.) Blooms Mar- May.
No potential No coastal scrub habitat is present in the Study Area. Clay soil is not present in the Study Area.
Almutaster pauciflorus
alkali marsh aster
None/None
G4/S1S2
2B.2
Perennial herb. Meadows and seeps. Alkaline. Elevations: 785-2625ft. (240-800m.) Blooms Jun-Oct. No potential Meadows and seeps are not present in the Study Area.
Ambrosia pumila
San Diego ambrosia
FE/None
G1/S1
1B.1
MSHCP
Perennial rhizomatous herb. Chaparral, coastal scrub, valley and foothill grassland, vernal pools. Alkaline (sometimes), clay (sometimes), disturbed areas (often), sandy (sometimes). Elevations: 65-1360ft. (20- 415m.) Blooms Apr-Oct.
No potential Chaparral, coastal scrub, valley, and vernal pools are not present in the Study Area. There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Arctostaphylos rainbowensis
Rainbow manzanita
None/None
G2/S2
1B.1
MSHCP
Perennial evergreen shrub. Chaparral. Usually found in gabbro chaparral. Elevations: 675-2200ft. (205- 670m.) Blooms Dec-Mar.
No potential Chaparral is not present in the Study Area.
Astragalus pachypus var. jaegeri
Jaeger's milk-vetch
None/None
G4T1/S1
1B.1
Perennial shrub. Chaparral, cismontane woodland, coastal scrub, valley and foothill grassland. Rocky (sometimes), sandy (sometimes). Elevations: 1200-3200ft. (365-975m.) Blooms Dec-Jun.
No potential Cismontane woodland and coastal scrub is not present within the Study Area. There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Atriplex coronata var. notatior
San Jacinto Valley crownscale
FE/None
G4T1/S1
1B.1
MSHCP
Annual herb. Playas, valley and foothill grassland, vernal pools. Alkaline. Elevations: 455-1640ft. (139- 500m.) Blooms Apr-Aug.
No potential Playas, valley and foothill grassland, and vernal pools are not present in the Study Area.
Atriplex parishii
Parish's brittlescale
None/None
G1G2/S1
1B.1
MSHCP
Annual herb. Chenopod scrub, playas, vernal pools. Alkaline. Elevations: 80-6235ft. (25-1900m.) Blooms Jun-Oct.
No potential There are no playas, and vernal pools present in the Study Area. There are no alkaline soils present.
There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Atriplex serenana var. davidsonii
Davidson's saltscale
None/None
G5T1/S1
1B.2
MSHCP
Annual herb. Coastal bluff scrub, coastal scrub. Alkaline. Elevations: 35-655ft. (10-200m.) Blooms Apr- Oct.
No potential There is no coastal bluff scrub present in the Study Area.
Ayenia compacta
California ayenia
None/None
G4/S3
2B.3
Perennial herb. Mojavean desert scrub, Sonoran Desert scrub. Rocky. Elevations: 490-3595ft. (150- 1095m.) Blooms Mar-Apr.
No potential Mojavean desert scrub and Sonoran Desert scrub are not present in the Study Area.
Brodiaea filifolia
thread-leaved brodiaea
FT/SE
G2/S2
1B.1
MSHCP
Perennial bulbiferous herb. Chaparral, cismontane woodland, coastal scrub, playas, valley and foothill grassland, vernal pools. Clay (often). Elevations: 80-3675ft. (25-1120m.) Blooms Mar-Jun.
No potential No coastal scrub habitat is present in the Study Area. Playas, valley and foothill grasslands, vernal pools, and clay soils are not present in the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 343
Menifee Mayor and City Council
July 15, 2026
Page
973 of 3153
City of Menifee
Trumble and Watson Warehouse Project
E-2
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Brodiaea santarosae
Santa Rosa Basalt brodiaea
None/None
G1/S1
1B.2
Perennial bulbiferous herb. Valley and foothill grassland. Santa Rosa Basalt. Elevations: 1855-3430ft. (565-1045m.) Blooms May-Jun.
No potential Species occurs outside of the elevation range of the Study Area.
Calochortus weedii var. intermedius
intermediate mariposa-lily
None/None
G3G4T3/S3
1B.2
MSHCP
Perennial bulbiferous herb. Chaparral, coastal scrub, valley and foothill grassland. Rocky. Elevations:
345-2805ft. (105-855m.) Blooms May-Jul.
No potential Coastal scrub and rocky soils are not present in the Study Area. There are no known populations of this species within 5 miles of the Study Area.
Centromadia pungens ssp. laevis
smooth tarplant
None/None
G3G4T2/S2
1B.1
Annual herb. Chenopod scrub, meadows and seeps, playas, riparian woodland, valley and foothill grassland. Alkaline. Elevations: 0-2100ft. (0-640m.) Blooms Apr-Sep.
No potential Chenopod scrub, meadows and seeps are not present in the Study Area.
Chorizanthe parryi var. parryi
Parry's spineflower
None/None
G3T2/S2
1B.1
MSHCP
Annual herb. Chaparral, cismontane woodland, coastal scrub, valley and foothill grassland. Openings, Rocky (sometimes), sandy (sometimes). Elevations: 900-4005ft. (275-1220m.) Blooms Apr-Jun.
Moderate potential No coastal scrub habitat and rocky soils are present within the Study Area.
Chorizanthe polygonoides var. longispina
long-spined spineflower
None/None
G5T3/S3
1B.2
MSHCP
Annual herb. Chaparral, coastal scrub, meadows and seeps, valley and foothill grassland, vernal pools.
Clay (often). Elevations: 100-5020ft. (30-1530m.) Blooms Apr-Jul.
No potential Clay soils, vernal pools, meadows and seeps, and grasslands are not present.
Clinopodium chandleri
San Miguel savory
None/None
G2G3/S2
1B.2
MSHCP
Perennial shrub. Chaparral, cismontane woodland, coastal scrub, riparian woodland, valley and foothill grassland. Gabbroic (sometimes), rocky (sometimes). Elevations: 395-3525ft. (120-1075m.) Blooms Mar- Jul.
No potential Coastal scrub, riparian habitat, and rocky soils are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Cryptantha wigginsii
Wiggins' cryptantha
None/None
G2/S1
1B.2
Annual herb. Coastal scrub. Often on clay soils. Elevations: 65-900ft. (20-275m.) Blooms Feb-Jun. No potential Coastal scrub or clay soils are not present in the Study Area.
Dodecahema leptoceras
slender-horned spineflower
FE/SE
G1/S1
1B.1
MSHCP
Annual herb. Chaparral, cismontane woodland, coastal scrub. Flood deposited terraces and washes; associates include Encelia, Dalea, Lepidospartum, etc. Sandy soils. Elevations: 655-2495ft. (200-760m.) Blooms Apr-Jun.
No potential Coastal scrub and sandy soils are not present in the Study Area within mostly disturbed habitat.
There have been no CNDDB occurrences of this species within five miles of the Study Area.
Dudleya multicaulis
many-stemmed dudleya
None/None
G2/S2
1B.2
MSHCP
Perennial herb. Chaparral, coastal scrub, valley and foothill grassland. In heavy, often clayey soils or grassy slopes. Elevations: 50-2590ft. (15-790m.) Blooms Apr-Jul.
No potential Coastal scrub and clay soils are not present in the Study Area. There is a small known population of this species within five miles of the Study Area.
Eryngium aristulatum var. parishii
San Diego button-celery
FE/SE
G5T1/S1
1B.1
MSHCP
Annual/perennial herb. Coastal scrub, valley and foothill grassland, vernal pools. San Diego mesa hardpan and claypan vernal pools and southern interior basalt flow vernal pools; usually surrounded by scrub. Elevations: 65-2035ft. (20-620m.) Blooms Apr-Jun.
No potential Coastal scrub is not present in the Study Area and this species is typically associated with vernal pools which are not present.
Geothallus tuberosus
Campbell's liverwort
None/None
G2/S2
1B.1
Ephemeral liverwort. Coastal scrub, vernal pools. Liverwort known from mesic soil. Elevations: 35- 1970ft. (10-600m.)
No potential No coastal scrub and vernal pools are present in the Study Area.
Hesperocyparis forbesii
Tecate cypress
None/None
G2/S2
1B.1
Perennial evergreen tree. Chaparral, closed-cone coniferous forest. Primarily on north-facing slopes; groves often associated with chaparral. On clay or gabbro. Elevations: 260-4920ft. (80-1500m.) No potential Chaparral and closed-cone conifer forest are not present in the Study Area.
Juncus luciensis
Santa Lucia dwarf rush
None/None
G3/S3
1B.2
Annual herb. Chaparral, great basin scrub, lower montane coniferous forest, meadows and seeps, vernal pools. Vernal pools, ephemeral drainages, wet meadow habitats and streamsides. Elevations: 985- 6695ft. (300-2040m.) Blooms Apr-Jul.
No potential Vernal pools, chaparral, great basin scrub, and lower montane coniferous forest are not present in the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 344
Menifee Mayor and City Council
July 15, 2026
Page
974 of 3153
Special-Status Wildlife Species in the Regional Vicinity of the Project Site
Habitat Assessment and MSHCP Consistency Analysis E-3
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Lasthenia glabrata ssp. coulteri
Coulter's goldfields
None/None
G4T2/S2
1B.1
MSHCP
Annual herb. Marshes and swamps, playas, vernal pools. Usually found on alkaline soils in playas, sinks, and grasslands. 1-. Elevations: 5-4005ft. (1-1220m.) Blooms Feb-Jun.
No potential Marshes and swamps, playas, and vernal pools are not present in the Study Area.
Lilium parryi
lemon lily
None/None
G3/S3
1B.2
MSHCP
Perennial bulbiferous herb. Lower montane coniferous forest, meadows and seeps, riparian forest, upper montane coniferous forest. Wet, mountainous terrain; generally, in forested areas; on shady edges of streams, in open boggy meadows and seeps. Elevations: 4005-9005ft. (1220-2745m.) Blooms Jul-Aug.
No potential Species occurs outside of the elevation range of the Study Area.
Limnanthes alba ssp. parishii
Parish's meadowfoam
None/SE
G4T2/S2
1B.2
MSHCP
Annual herb. Lower montane coniferous forest, meadows and seeps, vernal pools. Vernally moist areas and temporary seeps of highland meadows and plateaus; often bordering lakes and streams. Elevations:
1970-6560ft. (600-2000m.) Blooms Apr-Jun.
No potential Species occurs outside of the elevation range of the Study Area.
Monardella hypoleuca ssp. intermedia
intermediate monardella
None/None
G4T2?/S2?
1B.3
Perennial rhizomatous herb. Chaparral, cismontane woodland, lower montane coniferous forest. Often in steep, brushy areas. Elevations: 1310-4100ft. (400-1250m.) Blooms Apr-Sep.
No potential Chaparral, cismontane woodland, and lower montane coniferous forest are not present in the Study Area.
Nama stenocarpa
mud nama
None/None
G4G5/S1S2
2B.2
Annual/perennial herb. Marshes and swamps. Lake shores, riverbanks, intermittently wet areas.
Elevations: 15-1640ft. (5-500m.) Blooms Jan-Jul.
No potential Marshes and swamps. Lake shores, and riverbanks are not present in the Study Area.
Navarretia fossalis
spreading navarretia
FT/None
G2/S2
1B.1
MSHCP
Annual herb. Chenopod scrub, marshes and swamps, playas, vernal pools. San Diego hardpan and San Diego claypan vernal pools; in swales and vernal pools, often surrounded by other habitat types.
Elevations: 100-2150ft. (30-655m.) Blooms Apr-Jun.
No potential Chenopod scrub, marshes and swamps are not present in the Study Area.
Navarretia prostrata
prostrate vernal pool navarretia
None/None
G2/S2
1B.2
MSHCP
Annual herb. Coastal scrub, meadows and seeps, valley and foothill grassland, vernal pools. Alkaline soils in grassland, or in vernal pools. Mesic, alkaline sites. Elevations: 10-3970ft. (3-1210m.) Blooms Apr-Jul.
No potential This species is typically associated with vernal pools which are not present in the Study Area.
Orcuttia californica
California Orcutt grass
FE/SE
G1/S1
1B.1
Annual herb. Vernal pools. Elevations: 50-2165ft. (15-660m.) Blooms Apr-Aug. No potential Vernal pools are not present in the Study Area.
Pseudognaphalium leucocephalum
white rabbit-tobacco
None/None
G4/S2
2B.2
Perennial herb. Chaparral, cismontane woodland, coastal scrub, riparian woodland. Sandy, gravelly sites.
Elevations: 0-6890ft. (0-2100m.) Blooms (Jul)Aug-Nov(Dec).
No potential Coastal scrub and sandy soils are not present in the Study Area. There are no known CNDDB occurrences of this species within five miles of the Study Area.
Scutellaria bolanderi ssp. austromontana
southern mountains skullcap
None/None
G4T3/S3
1B.2
Perennial rhizomatous herb. Chaparral, cismontane woodland, lower montane coniferous forest. In gravelly soils on streambanks or in mesic sites in oak or pine woodland. Elevations: 1395-6560ft. (425- 2000m.) Blooms Jun-Aug.
No potential Chaparral, cismontane woodland, and lower montane coniferous forest are not present in the Study Area.
Sibaropsis hammittii
Hammitt's clay-cress
None/None
G2/S2
1B.2
MSHCP
Annual herb. Chaparral, valley and foothill grassland. Mesic microsites in open areas on clay soils in Stipa grassland. Often surrounded by Adenostoma chaparral. Elevations: 2360-3495ft. (720-1065m.) Blooms Mar-Apr.
No potential Chaparral and valley and foothill grasslands are not present in the Study Area.
Sidalcea neomexicana
salt spring checkerbloom
None/None
G4/S2
2B.2
Perennial herb. Chaparral, coastal scrub, lower montane coniferous forest, Mojavean desert scrub, playas. Alkali springs and marshes. Elevations: 50-5020ft. (15-1530m.) Blooms Mar-Jun.
No potential Chaparral, coastal scrub, and lower montane coniferous forest are not present in the Study Area.
Sphaerocarpos drewiae
bottle liverwort
None/None
G1/S1
1B.1
Ephemeral liverwort. Chaparral, coastal scrub. Liverwort in openings; on soil. Elevations: 295-1970ft. (90-600m.)
No potential Chaparral and coastal scrub habitat is not present in the Study Area.. There are no known CNDDB occurrences of this species within five miles of the Study Area.
Symphyotrichum defoliatum
San Bernardino aster
None/None
G2/S2
1B.2
Perennial rhizomatous herb. Cismontane woodland, coastal scrub, lower montane coniferous forest, marshes and swamps, meadows and seeps, valley and foothill grassland. Vernally mesic grassland or near ditches, streams and springs; disturbed areas. Elevations: 5-6695ft. (2-2040m.) Blooms Jul-Nov.
No potential Coastal scrub habitat, marshes, and swamps are present in the Study Area. There are no known CNDDB occurrences of this species within five miles of the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 345
Menifee Mayor and City Council
July 15, 2026
Page
975 of 3153
City of Menifee
Trumble and Watson Warehouse Project
E-4
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Tortula californica
California screw moss
None/None
G2G3/S2?
1B.2
Moss. Chenopod scrub, valley and foothill grassland. Moss growing on sandy soil. Elevations: 35-4790ft. (10-1460m.)
No potential No scrub habitat and sandy soils are present in the Study Area.
Trichocoronis wrightii var. wrightii
Wright's trichocoronis
None/None
G4T3/S1
2B.1
MSHCP
Annual herb. Marshes and swamps, meadows and seeps, riparian forest, vernal pools. Mud flats of vernal lakes, drying riverbeds, alkali meadows. Elevations: 15-1425ft. (5-435m.) Blooms May-Sep.
No potential No riparian vegetation is present in the Study Area, Invertebrates
Bombus crotchii
Crotch’s bumble bee
None/SCE
G2/S2
Coastal California east to the Sierra-Cascade crest and south into Mexico. Food plant genera include Antirrhinum, Phacelia, Clarkia, Dendromecon, Eschscholzia, and Eriogonum.
No potential No food plants are present throughout the Study Area. There are two CNDDB occurrences within five miles of the Study Area from 1975 and 2001.
Bombus pensylvanicus
American bumble bee
None/None
G3G4/S2
Long-tongued; forages on a wide variety of flowers including vetches (Vicia), clovers (Trifolium), thistles (Cirsium), sunflowers (Helianthus), etc. Nests above ground under long grass or underground. Queens overwinter in rotten wood or underground.
Low potential Helianthus spp. is present in the Study Area, but the Study Area is highly disturbed. There are 23 known CNDDB occurrences of this species within five miles of the Study Area since 1946.
Branchinecta lynchi
vernal pool fairy shrimp
FT/None
G3/S3
MSHCP
Endemic to the grasslands of the Central Valley, Central Coast mountains, and South Coast mountains, in astatic rain-filled pools. Inhabit small, clear-water sandstone-depression pools and grassed swale, earth slump, or basalt-flow depression pools.
No potential Vernal pools, grassed swales, and depression pools are not present in the Study Area.
Branchinecta sandiegonensis
San Diego fairy shrimp
FE/None
G2/S1
Endemic to San Diego and Orange County mesas. Vernal pools. No potential Vernal pools are not present in the Study Area.
Cicindela senilis frosti
senile tiger beetle
None/None
G2G3T1T3/S1
Inhabits marine shoreline, from Central California coast south to salt marshes of San Diego. Also found at Lake Elsinore. Inhabits dark-colored mud in the lower zone and dried salt pans in the upper zone.
No potential Marine shorelines, salt marshes, and lake shores are not present in the Study Area.
Euphydryas editha quino
quino checkerspot butterfly
FE/None
G4G5T1T2/S1S2
MSHCP
Sunny openings within chaparral and coastal sage shrublands in parts of Riverside and San Diego counties. Hills and mesas near the coast. Need high densities of food plants Plantago erecta, P. insularis, and Orthocarpus purpurescens.
No potential Food plants are not present in the Study Area. There is no CNDDB occurrence within five miles of the Study Area.
Linderiella occidentalis
California linderiella
None/None
G2G3/S2S3
Seasonal pools in unplowed grasslands with old alluvial soils underlain by hardpan or in sandstone depressions. Water in the pools has very low alkalinity, conductivity, and total dissolved solids.
No potential Seasonal pools are not present in the Study Area.
Linderiella santarosae
Santa Rosa Plateau fairy shrimp
None/None
G1G2/S1
MSHCP
Found only in the vernal pools on Santa Rosa Plateau in Riverside County. Southern basalt flow vernal pools.
No potential Vernal pools are not present in the Study Area.
Neolarra alba
white cuckoo bee
None/None
GH/SH
Known only from localities in Southern California. Cleptoparasitic in the nests of perdita bees. No potential There are no CNDDB occurrences of this species within five miles of the Study Area.
Socalchemmis icenoglei
Icenogle's socalchemmis spider
None/None
G1/S1
Known only from the type locality in the vicinity of Winchester, Riverside County. . No potential There are no CNDDB occurrences of this species within five miles of the Study Area.
Streptocephalus woottoni
Riverside fairy shrimp
FE/None
G1G2/S2
MSHCP
Endemic to Western Riverside, Orange, and San Diego counties in areas of tectonic swales/earth slump basins in grassland and coastal sage scrub. Inhabit seasonally astatic pools filled by winter/spring rains.
Hatch in warm water later in the season.
No potential Vernal pools and swales/earth slump basins are not present in the Study Area.
Fish
Gila orcuttii
arroyo chub
None/None
G2/S2
SSC
MSHCP
Native to streams from Malibu Creek to San Luis Rey River basin. Introduced into streams in Santa Clara, Ventura, Santa Ynez, Mojave and San Diego river basins. Slow water stream sections with mud or sand bottoms. Feeds heavily on aquatic vegetation and associated invertebrates.
No potential There is no aquatic habitat present in the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 346
Menifee Mayor and City Council
July 15, 2026
Page
976 of 3153
Special-Status Wildlife Species in the Regional Vicinity of the Project Site
Habitat Assessment and MSHCP Consistency Analysis E-5
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Amphibians
Anaxyrus californicus
arroyo toad
FE/None
G2G3/S2
SSC
MSHCP
Semi-arid regions near washes or intermittent streams, including valley-foothill and desert riparian, desert wash, etc. Rivers with sandy banks, willows, cottonwoods, and sycamores; loose, gravelly areas of streams in drier parts of range.
No potential Washes, intermittent streams, and sandy banks are not present in the Study Area.
Rana draytonii
California red-legged frog
FT/None
G2G3/S2S3
SSC
MSHCP
Lowlands and foothills in or near permanent sources of deep water with dense, shrubby or emergent riparian vegetation. Requires 11-20 weeks of permanent water for larval development. Must have access to estivation habitat.
No potential There is no aquatic habitat present in the Study Area.
Spea hammondii
western spadefoot
None/None
G2G3/S3S4
SSC
MSHCP
Occurs primarily in grassland habitats but can be found in valley-foothill hardwood woodlands. Vernal pools are essential for breeding and egg-laying.
No potential Vernal pools are not present in the Study Area.
Taricha torosa
Coast Range newt
None/None
G4/S4
SSC
MSHCP
Coastal drainages from Mendocino County to San Diego County. Lives in terrestrial habitats and will migrate over 1 km to breed in ponds, reservoirs and slow-moving streams.
No potential There are no permanent bodies of water within the Study Area.
Reptiles
Actinemys pallida
southwestern pond turtle
FPT/None
G2G3/SNR
SSC
A thoroughly aquatic turtle of ponds, marshes, rivers, streams and irrigation ditches, usually with aquatic vegetation, below 6000 ft elevation. Needs basking sites and suitable (sandy banks or grassy open fields) upland habitat up to 0.5 km from water for egg-laying. Occurs in southern California from Monterey County south to Los Angeles, Riverside, and San Diego Counties into northern Baja California, Mexico.
No potential Marshes, rivers, streams and irrigation ditches areas are not present within the Study Area. There are no CNDDB occurrences within five miles of the Study Area.
Anniella stebbinsi
Southern California legless lizard
None/None
G3/S3
SSC
Generally south of the Transverse Range, extending to northwestern Baja California. Occurs in sandy or loose loamy soils under sparse vegetation. Disjunct populations in the Tehachapi and Piute Mountains in Kern County. Variety of habitats; generally in moist, loose soil. They prefer soils with a high moisture content.
No Potential Sandy or loose loamy soils are not present within the Study Area. No CNDDB occurrences within five miles of the Study Area.
Arizona elegans occidentalis
California glossy snake
None/None
G5T2/S2
SSC
Patchily distributed from the eastern portion of San Francisco Bay, southern San Joaquin Valley, and the Coast, Transverse, and Peninsular ranges, south to Baja California. Generalist reported from a range of scrub and grassland habitats, often with loose or sandy soils.
No potential Scrub habitat is not present in the Study Area. The site is surrounded by development, making it difficult for any nearby populations to move into the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Aspidoscelis hyperythra
orange-throated whiptail
None/None
G5/S2S3
WL
MSHCP
Inhabits low-elevation coastal scrub, chaparral, and valley-foothill hardwood habitats. Prefers washes and other sandy areas with patches of brush and rocks. Perennial plants necessary for its major food:
termites.
No potential Coastal scrub and sandy areas are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Aspidoscelis tigris stejnegeri
coastal whiptail
None/None
G5T5/S3
SSC
MSHCP
Found in deserts and semi-arid areas with sparse vegetation and open areas. Also found in woodland and riparian areas. Ground may be firm soil, sandy, or rocky.
No potential Semi-arid areas and riparian areas with sandy soils are not present in the Study Area. There are no known CNDDB occurrences of this species within five miles of the Study Area.
Coleonyx variegatus abbotti
San Diego banded gecko
None/None
G5T5/S1S2
SSC
Coastal and cismontane Southern California. Found in granite or rocky outcrops in coastal scrub and chaparral habitats.
No potential No granite or rocky outcrops in coastal scrub and chaparral habitats in the Study Area.
Crotalus ruber
red-diamond rattlesnake
None/None
G4/S3
SSC
MSHCP
Chaparral, woodland, grassland, and desert areas from coastal San Diego County to the eastern slopes of the mountains. Occurs in rocky areas and dense vegetation. Needs rodent burrows, cracks in rocks or surface cover objects.
No potential Chaparral, woodland, grassland, and desert areas are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Diadophis punctatus modestus
San Bernardino ringneck snake
None/None
G5T2T3/S2?
Most common in open, relatively rocky areas. Often in somewhat moist microhabitats near intermittent streams. Avoids moving through open or barren areas by restricting movements to areas of surface litter or herbaceous veg.
No potential Intermittent streams are not present in the Study Area. There are no known CNDDB occurrences of this species within five miles of the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 347
Menifee Mayor and City Council
July 15, 2026
Page
977 of 3153
City of Menifee
Trumble and Watson Warehouse Project
E-6
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Phrynosoma blainvillii
coast horned lizard
None/None
G4/S4
SSC
MSHCP
Frequents a wide variety of habitats, most common in lowlands along sandy washes with scattered low bushes. Open areas for sunning, bushes for cover, patches of loose soil for burial, and abundant supply of ants and other insects.
Low potential No sandy washes and low bushes are present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area. This species is known to inhabit disturbed habitats with scattered low brush.
Salvadora hexalepis virgultea
coast patch-nosed snake
None/None
G5T4/S3
SSC
Brushy or shrubby vegetation in coastal Southern California. Require small mammal burrows for refuge and overwintering sites.
No potential Shrubby vegetation and small mammal burrows are not present in the Study Area.
Thamnophis hammondii
two-striped gartersnake
None/None
G4/S3S4
SSC
Coastal California from vicinity of Salinas to northwest Baja California. From sea to about 7,000 ft elevation. Highly aquatic, found in or near permanent fresh water. Often along streams with rocky beds and riparian growth.
No potential Permanent fresh water is not present in the Study Area.
Thamnophis sirtalis pop. 1
south coast gartersnake
None/None
G5T1T2/S1S2
SSC
Southern California coastal plain from Ventura County to San Diego County, and from sea level to about 850 m. Marsh and upland habitats near permanent water with good strips of riparian vegetation.
No potential Marsh and upland habitats are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Birds
Accipiter cooperii
Cooper's hawk
None/None
G5/S4
WL
MSHCP
Woodland, chiefly of open, interrupted or marginal type. Nest sites mainly in riparian growths of deciduous trees, as in canyon bottoms on river flood-plains; also, live oaks.
Low potential No riparian trees are present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area. However, this species can occur in developed and disturbed habitats with large trees present.
Agelaius tricolor
tricolored blackbird
None/ST
G1G2/S2
SSC
MSHCP
Highly colonial species, most numerous in Central Valley and vicinity. Largely endemic to California.
Requires open water, protected nesting substrate, and foraging area with insect prey within a few km of the colony.
No potential Open, permanent water is not present in the Study Area.
Aimophila ruficeps canescens
southern California rufous-crowned
sparrow
None/None
G5T3/S4
WL
MSHCP
Resident in Southern California coastal sage scrub and sparse mixed chaparral. Frequents relatively steep, often rocky hillsides with grass and forb patches.
No potential Coastal sage scrub and sparse mixed chaparral are not present in the Study Area.
Aquila chrysaetos
golden eagle
None/None
G5/S3
FP
WL
MSHCP
Rolling foothills, mountain areas, sage-juniper flats, and desert. Cliff-walled canyons provide nesting habitat in most parts of range; also, large trees in open areas.
No potential Rolling foothills, mountain areas, sage-juniper flats, and desert are not present in the Study Area.
Artemisiospiza belli belli
Bell's sparrow
None/None
G5T2T3/S3
WL
MSHCP
Nests in chaparral dominated by fairly dense stands of chamise. Found in coastal sage scrub in south of range. Nest located on the ground beneath a shrub or in a shrub 6-18 inches above ground. Territories about 50 yds apart.
No potential Coastal sage scrub is not present in the Study Area, although limited. There are no CNDDB occurrences of this species within five miles of the Study Area.
Asio otus
long-eared owl
None/None
G5/S3?
SSC
Riparian bottomlands grown to tall willows and cottonwoods; also, belts of live oak paralleling stream courses. Require adjacent open land, productive of mice and the presence of old nests of crows, hawks, or magpies for breeding.
No potential There are no willows and cottonwoods in the Study Area. There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Athene cunicularia
burrowing owl
None/None
G4/S2
SSC
MSHCP
Open, dry annual or perennial grasslands, deserts, and scrublands characterized by low-growing vegetation. Subterranean nester, dependent upon burrowing mammals, most notably, the California ground squirrel.
No potential There is no scrub habitat in the Study Area. No burrows are present in the Study Area, with no burrowing owl or sign observed during survey.
Buteo regalis
ferruginous hawk
None/None
G4/S3S4
WL
MSHCP
Open grasslands, sagebrush flats, desert scrub, low foothills and fringes of pinyon and juniper habitats.
Eats mostly lagomorphs, ground squirrels, and mice. Population trends may follow lagomorph population cycles.
No potential The Study Area is highly developed/disturbed, with no native open habitat. There are no CNDDB occurrences of this species within five miles of the Study Area.
Buteo swainsoni
Swainson's hawk
None/ST
G5/S4
MSHCP
Breeds in grasslands with scattered trees, juniper-sage flats, riparian areas, savannahs, and agricultural or ranch lands with groves or lines of trees. Requires adjacent suitable foraging areas such as grasslands, or alfalfa or grain fields supporting rodent populations.
No potential There is no suitable nesting or foraging areas within or adjacent to the Study Area. There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 348
Menifee Mayor and City Council
July 15, 2026
Page
978 of 3153
Special-Status Wildlife Species in the Regional Vicinity of the Project Site
Habitat Assessment and MSHCP Consistency Analysis E-7
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Campylorhynchus brunneicapillus
sandiegensis
coastal cactus wren
None/None
G5T3Q/S2
SSC
Southern California coastal sage scrub. Wrens require tall opuntia cactus for nesting and roosting. No potential There are no suitable nesting or foraging areas within or adjacent to the Study Area. There are no CNDDB occurrences of this species within 5 miles of the Study Area.
Charadrius nivosus nivosus
western snowy plover
FT/None
G3T3/S3
SSC
Sandy beaches, salt pond levees and shores of large alkali lakes. Needs sandy, gravelly or friable soils for nesting.
No potential Sandy beaches, salt pond levees, and alkali lakes are not present in the Study Area.
Circus hudsonius
northern harrier
None/None
G5/S3
SSC
Coastal salt and freshwater marsh. Nest and forage in grasslands, from salt grass in desert sink to mountain cienagas. Nests on ground in shrubby vegetation, usually at marsh edge; nest built of a large mound of sticks in wet areas.
No potential Coastal salt and freshwater marsh are not present within the Study Area.
Elanus leucurus
white-tailed kite
None/None
G5/S3S4
FP
MSHCP
Rolling foothills and valley margins with scattered oaks and river bottomlands or marshes next to deciduous woodland. Open grasslands, meadows, or marshes for foraging close to isolated, dense- topped trees for nesting and perching.
No potential There are no suitable nesting or foraging areas within or adjacent to the Study Area. There was no CNDDB occurrences of this species within five miles from the Study Area along.
Eremophila alpestris actia
California horned lark
None/None
G5T4Q/S4
WL
MSHCP
Coastal regions, chiefly from Sonoma County to San Diego County. Also, main part of San Joaquin Valley and east to foothills. Short-grass prairie, "bald" hills, mountain meadows, open coastal plains, fallow grain fields, alkali flats.
Low potential Short-grass prairie, and fallow grain fields are present just outside the Study Area.
Haliaeetus leucocephalus
bald eagle
FD/SE
G5/S3
FP
MSHCP
Ocean shore, lake margins, and rivers for both nesting and wintering. Most nests are within 1 mile of water. Nests in large, old-growth, or dominant live tree with open branches, especially ponderosa pine.
Roosts communally in winter.
No potential None of the trees in the Study Area are appropriate nesting habitat for this species.
Icteria virens
yellow-breasted chat
None/None
G5/S4
SSC
MSHCP
Summer resident; inhabits riparian thickets of willow and other brushy tangles near watercourses. Nests in low, dense riparian, consisting of willow, blackberry, wild grape; forages and nests within 10 ft of ground.
No potential No Salix spp. trees are present in the Study Area. There is no CNDDB occurrences of this species within five miles from the Study Area.
Lanius ludovicianus
loggerhead shrike
None/None
G4/S4
SSC
MSHCP
Broken woodlands, savannah, pinyon-juniper, Joshua tree, and riparian woodlands, desert oases, scrub and washes. Prefers open country for hunting, with perches for scanning, and fairly dense shrubs and brush for nesting.
Low potential Scrub habitat and washes are not present in the Study Area. Species may forage in disturbed areas.
Plegadis chihi
white-faced ibis
None/None
G5/S3S4
WL
MSHCP
Shallow freshwater marsh. Dense tule thickets for nesting, interspersed with areas of shallow water for foraging.
No potential There are no marshes or tule thickets present in the Study Area.
Polioptila californica californica
coastal California gnatcatcher
FT/None
G4G5T3Q/S2
SSC
MSHCP
Obligate, permanent resident of coastal sage scrub below 2500 ft in Southern California. Low, coastal sage scrub in arid washes, on mesas and slopes. Not all areas classified as coastal sage scrub are occupied.
No potential There is no coastal sage scrub habitat in the Study Area.
Setophaga petechia
yellow warbler
None/None
G5/S3
SSC
Riparian plant associations in close proximity to water. Also nests in montane shrubbery in open conifer forests in Cascades and Sierra Nevada. Frequently found nesting and foraging in willow shrubs and thickets, and in other riparian plants including cottonwoods, sycamores, ash, and alders.
No potential There is no willow shrubs and thickets present in the Study Area.
Vireo bellii pusillus
least Bell's vireo
FE/SE
G5T2/S3
MSHCP
Summer resident of Southern California in low riparian in vicinity of water or in dry river bottoms; below 2000 ft. Nests placed along margins of bushes or on twigs projecting into pathways, usually willow, Baccharis, mesquite.
No potential There are no Salix spp. and Baccharis spp. and riparian habitat present in the Study Area.
Xanthocephalus xanthocephalus
yellow-headed blackbird
None/None
G5/S3
SSC
Nests in freshwater emergent wetlands with dense vegetation and deep water. Often along borders of lakes or ponds. Nests only where large insects such as Odonata are abundant, nesting timed with maximum emergence of aquatic insects.
No potential Freshwater emergent wetlands with dense vegetation is not present in the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 349
Menifee Mayor and City Council
July 15, 2026
Page
979 of 3153
City of Menifee
Trumble and Watson Warehouse Project
E-8
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Mammals
Chaetodipus californicus femoralis
Dulzura pocket mouse
None/None
G5T3/S3
Found in a variety of habitats including coastal scrub, chaparral, and grassland in San Diego County, Baja California, and Mexico. Attracted to grass-chaparral edges.
No potential Coastal scrub and grassland habitat is not present in the Study Area. There are no known CNDDB occurrences of this species within five miles of the Study Area.
Chaetodipus fallax fallax
northwestern San Diego pocket mouse
None/None
G5T3T4/S3S4
MSHCP
Inhabits coastal sage scrub, sagebrush scrub, grasslands, and chaparral communities. Found in open, sandy areas in southwestern California and northern Baja California. Prefers moderately gravelly and rocky substrates.
No potential Coastal sage scrub and grasslands are not present in the Study Area. There is one CNDDB occurrence of this species within five miles of the Study Area.
Dipodomys merriami parvus
San Bernardino kangaroo rat
FE/SCE
G5T1/S1
SSC
MSHCP
Alluvial scrub vegetation on sandy loam substrates characteristic of alluvial fans and flood plains. Needs early to intermediate seral stages.
No potential Alluvial scrub habitat/flood plains is not present in the Study Area.
Dipodomys stephensi
Stephens' kangaroo rat
FT/ST
G2/S3
MSHCP
Found primarily in annual and perennial grasslands, but also occurs in coastal scrub and sagebrush with sparse canopy cover. Prefers buckwheat, chamise, brome grass filaree. Will burrow into firm soil and use the burrows of California ground squirrels and pocket gophers. Occurs only in southern California.
No potential Buckwheat sagebrush, brome grass, and filaree are not present in the Study Area.
Eumops perotis californicus
western mastiff bat
None/None
G4G5T4/S3S4
SSC
Occurs in open, semi-arid to arid habitats, including coniferous and deciduous woodlands, coastal scrub, grasslands, and chaparral. Roosts in crevices in cliff faces and caves, and buildings. Roosts typically occur high above ground.
No potential Cliff faces, caves, and tall buildings are not present within or adjacent to the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Lasiurus xanthinus
western yellow bat
None/None
G4G5/S3
SSC
Occurs in arid regions of the southwestern United States. Typically found in riparian woodlands, oak or pinyon-juniper woodland, desert wash, palm oasis habitats, and urban or suburban areas. Roosts in trees, often between palm fronds.
No potential The Study Area does not contain riparian habitat. There are no CNDDB occurrences of this species within five miles of the Study Area.
Lepus californicus bennettii
San Diego black-tailed jackrabbit
None/None
G5T3T4/S3S4
MSHCP
Occurs in Los Angeles, San Bernardino, Riverside, and San Diego Counties of southern California.
Typically found in open shrub habitats. Will also occur in woodland habitats with open understory adjacent to shrublands.
No potential The shrub habitat is very limited and adjacent to disturbed lands in the Study Area.
Neotoma lepida intermedia
San Diego desert woodrat
None/None
G5T3T4/S3S4
SSC
MSHCP
Occurs in scrub habitats of southern California from San Luis Obispo County to San Diego County. No potential No middens were observed during the site visits. There are no CNDDB occurrences of this species within five miles of the Study Area.
Nyctinomops femorosaccus
pocketed free-tailed bat
None/None
G5/S3
SSC
Variety of arid areas in Southern California; pine-juniper woodlands, desert scrub, palm oasis, desert wash, desert riparian, etc. Rocky areas with high cliffs.
No potential Pine-juniper woodlands, desert scrub, palm oasis, desert wash, desert riparian, and rocky areas with high cliffs are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Onychomys torridus ramona
southern grasshopper mouse
None/None
G5T3/S3
SSC
Desert areas, especially scrub habitats with friable soils for digging. Prefers low to moderate shrub cover.
Feeds almost exclusively on arthropods, especially scorpions and orthopteran insects.
No potential Scrub habitat is not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Perognathus longimembris brevinasus
Los Angeles pocket mouse
None/None
G5T2/S1S2
SSC
MSHCP
Lower elevation grasslands and coastal sage communities in and around the Los Angeles Basin. Open ground with fine, sandy soils. May not dig extensive burrows, hiding under weeds and dead leaves instead.
No potential Scrub habitat and sandy soils are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Perognathus longimembris internationalis
Jacumba pocket mouse
None/None
G5T2T3/S2
SSC
Desert riparian, desert scrub, desert wash, coastal scrub and sagebrush. Rarely found on rocky sites; uses all canopy coverages.
No potential Desert riparian, desert scrub, and desert wash are not present in the Study Area. There are no CNDDB occurrences of this species within five miles of the Study Area.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 350
Menifee Mayor and City Council
July 15, 2026
Page
980 of 3153
Special-Status Wildlife Species in the Regional Vicinity of the Project Site
Habitat Assessment and MSHCP Consistency Analysis E-9
Scientific Name
Common Name Status Habitat Requirements
Potential to Occur
in Project Site
Habitat Suitability/
Observations
Taxidea taxus
American badger
None/None
G5/S3
SSC
Most abundant in drier open stages of most shrub, forest, and herbaceous habitats, with friable soils.
Needs sufficient food, friable soils and open, uncultivated ground. Preys on burrowing rodents. Digs burrows.
No potential The Study Area is surrounded by developments and is unlikely to support this species, which needs open, uncultivated ground and a large homerange.
Regional Vicinity refers to within a 9-quad search radius of site.
Status (Federal/State)
FE = Federal Endangered
FT = Federal Threatened
FPE = Federal Proposed Endangered
FPT = Federal Proposed Threatened
FD = Federal Delisted
FC = Federal Candidate
MSHCP = MSHCP Covered
SE = State Endangered
ST = State Threatened
SCE = State Candidate Endangered
SCT = State Candidate Threatened
SR = State Rare
SD = State Delisted
SSC = CDFW Species of Special Concern
FP = CDFW Fully Protected
WL = CDFW Watch List
CRPR (CNPS California Rare Plant Rank)
1A = Presumed extirpated in California, and rare or extinct elsewhere 1B = Rare, Threatened, or Endangered in California and elsewhere 2A = Presumed extirpated in California, but common elsewhere 2B= Rare, Threatened, or Endangered in California, but more common elsewhere 3 = Need more information (Review List)
4 = Limited Distribution (Watch List)
CRPR Threat Code Extension
.1 = Seriously endangered in California (>80% of occurrences threatened/high degree and immediacy of threat) .2 = Moderately threatened in California (20-80% of occurrences threatened/moderate degree and immediacy of threat) .3 = Not very endangered in California (<20% of occurrences threatened/low degree and immediacy of threat) Other Statuses
G1 or S1 Critically Imperiled Globally or Subnationally (state) G2 or S2 Imperiled Globally or Subnationally (state)
G3 or S3 Vulnerable to extirpation or extinction Globally or Subnationally (state) G4/5 or S4/5 Apparently secure, common and abundant
GH or SH Possibly Extirpated – missing; known from only historical occurrences but still some hope of rediscovery Additional notations may be provided as follows
T – Intraspecific Taxon (subspecies, varieties, and other designations below the level of species) Q – Questionable taxonomy that may reduce conservation priority ? – Inexact numeric rank
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 351
Menifee Mayor and City Council
July 15, 2026
Page
981 of 3153
City of Menifee
Trumble and Watson Warehouse Project
E-10
This page intentionally left blank.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 352
Menifee Mayor and City Council
July 15, 2026
Page
982 of 3153
Appendix C
Cultural Resources Report
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 353
Menifee Mayor and City Council
July 15, 2026
Page
983 of 3153
Rincon Consultants, Inc.
250 East 1st Street, Suite 1400
Los Angeles, California 90012
213-788-4842
w w w. r in co n co nsu ltan ts. co m
January 9, 2025
Project No: 24-16157
Mr. Russel J. Brown
City of Menifee
29844 Haun Road
Menifee, California 92586
Via email: [email protected]
Subject: Cultural Resources Assessment for the Trumble and Watson Warehouse Project City of Menifee, Riverside County, California
Dear Mr. Brown:
The City of Menifee (City) retained Rincon Consultants, Inc (Rincon) to prepare a cultural resources assessment study in support of the Trumble and Watson Warehouse Project (project), located in the City of Menifee . Riverside County, California . This letter report documents the results of the assessment and tasks conducted by Rincon, including a California Historical Resources Information System (CHRIS) records search, a Native American Heritage Commission (NAHC) Sacred Land Files (SLF) search, background research, and a desktop geoarchaeological review of the project site. This study has been completed pursuant to requirements of the California Environmental Quality Act (CEQA) Section 15064.5. The City is the lead agency under CEQA. Methods, results, and recommendations are presented below.
Project Site and Description
The 17.19-acre project site is located in the City of Menifee, Riverside County . The project site encompasses a portion of Section 10 of Township 5 South, Range 3 West on the Romoland, California United States Geological Survey (USGS) 7.5 -minute topographic quadrangle, Specifically, the project site is located on Trumble Road south of the intersection with Watson Road within Assessor’s Parcel Numbers 329-240-046, 329-240-048, 329-240-049, and 329-240-051 east of Interstate 215 and Highway 74 (Attachment 1: Figure 1 and Figure 2).
The project site, formerly known as the Trumble Pit Site (or Trumble Road Open Pit) , was originally operated as an open pit mine and soil hauling (import and export) facility and has, most recently, been used as a soil and concrete recycling area. The former open pit was subject to rough grading and restoration between 2019 and 2022. The pit restoration involved 5,000 cubic yards (cy) of cut and 207,000 cy of fill import to fill the pit and level the site.
The current project proposes to construct a 328,205 -square-foot warehouse building , including 15,000 square-feet of office space and associated parking lot and drive aisles (425 parking spaces, including 333 standard stalls and 92 trailer stalls). Watson Road would be improved while providing safe and adequate access across the railroad tracks to Highway 74.
Methods
This section presents the methods for each task completed during the preparation of this assessment. r
RINCON CONSULTANTS , INC . SINCE 1994
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 354
Menifee Mayor and City Council
July 15, 2026
Page
984 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 2 Background Research
California Historical Resources Information System Records Search On December 5, 2024 , Rincon conducted a supplemental search of CHRIS at the South Coastal Information Center. The South Coastal Information Center is the official state repository for cultural resources records and reports for Riverside County. Rincon previously completed a CHRIS records search that captured the project site and a 0.5-mile search radius in 2018. The purpose of the 2024 supplemental records search was to obtain any previously recorded cultural resources and previously conducted cultural resources studies within the project site plus a 0.5-mile radius that have been completed since 2018. Rincon also reviewed the National Register of Hi storic Places, the California Register of Historical Resources, California Historical Landmarks list, Built Environment Resources Directory, and Archaeological Determination of Eligibility list. Results of the records search can be found in Attachment 2.
Sacred Lands File Search
Rincon contacted the NAHC on November 1, 2024, to request a search of the SLF and a contact list of Native Americans culturally affiliated with the project site vicinity (Attachment 3).
Geoarchaeological Review
A geoarchaeological review was conducted to assess the potential for subsurface archaeological resources to be present within the project site. Sources reviewed as part of this assessment include historical topographic maps, historical aerial photographs, geologic maps, and soil survey maps.
Findings
This section presents the findings of each task completed during the preparation of this assessment.
California Historical Resources Information System Records Search Previous Cultural Resources Studies
The CHRIS records search results indicate 18 cultural resources studies have been previously conducted within 0.5 mile of the project site between 1989 and 20 24 (Attachment 2). None of the studies were conducted within or adjacent to the project site. However, the entire project site has been previously studied by the cultural resources assessment prepared for the Trumble Road Open Restoration Project in 2018 (Hass and Duran 2018). This study is summarized below.
Previous Studies Covering the Project Site
The 2018 Trumble Road Open Pit Restoration, Cultural Resources Records Search and Archaeological Survey, APN 329 -240-046/048/049/051, Menifee, Riverside County, California , was prepared by Hannah Haas and Christopher Duran for the Nort h Pacific Development, Inc. in June 2018 and consists of a records search and an archaeological field survey of the project site (Hass and Duran 2018). The study was conducted (within the context of the City of Menifee’s Tribal Consultation with the Soboba Band of Luiseno Indi ans [Soboba], pursuant to Assembly Bill 52) . The Soboba ha d requested that a cultural resources records search, archaeological survey, and report be prepared for the Trumble Road Open Pit Restoration Project. The 2018 study encompasse d 100 percent of the current project site. The study concluded that due to the level of previous disturbance of the mining pit operation, the project site is not considered to be sensitive for archaeological resources and is r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 355
Menifee Mayor and City Council
July 15, 2026
Page
985 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 3 unlikely to impact any previously unrecorded resources. Hass and Duran recommended a standard unanticipated discoveries measure for all project-related ground-disturbing activities (Hass and Duran 2018).
Previously Recorded Cultural Resources
The CHRIS records search identified 10 previously recorded cultural resources within a 0.5-mile radius of the project site (Table 1). All resources identified are historic built environment resources. Two of these (P-33-015743 [California Southern Railway mainline] and P -33-021493 [Watson Road]) are recorded adjacent to the project site. None of these resources were identified within the project site.
Table 1 Previously Recorded Resources within 0.5-Mile of the Project Site Primary
Number and
Trinomial Resource Type Description Recording Events NR/CR Status Relationship
to Project
Site
33-007701 Historic Building Vernacular
single-family
residence
1982 (W. Hedges) 5D: Contributor to a
district or designated
locally
Outside
33-015383 Historic Building Craftsman style
single-family
residence
2006 (M. Rees) 6; Recommended
ineligible for the NR, or
CR through survey
evaluation
Outside
33-015389 Historic Building Ranch style
single-family
residence
2006 (M Rees) 6; Recommended
ineligible for the NR, or
CR through survey
evaluation
Outside
33-020448/
CA-RIV-10349
Historic Road 4th Street 2011 (J. Trampier) No record of evaluation for NR or CR listing
Outside
33-020449/
CA-RIV-10350
Historic Road 2nd Street 2011 (J. Trampier) No record of evaluation for NR or CR listing
Outside
33-020450/
CA-RIV-10351
Historic Road 1st Street 2012 (J. Trampier) No record of evaluation for NR or CR listing
Outside
33-020502/
CA-RIV-10403
Historic Road Sherman Road 2011 (J. Trampier) No record of evaluation for NR or CR listing
Outside
33-020503/
CA-RIV-10404
Historic Road 3rd Street 2011 (J. Trampier) No record of evaluation for NR or CR listing
Outside
33-021493/
CA-RIV-11281
Historic Road Watson Road 2011 (J. Trampier) No record of evaluation for NR or CR listing
Adjacent
33-020448/
CA-RIV-10349
Historic Road 4th Street 2011 (J. Trampier) No record of evaluation for NR or CR listing
Outside
NR = National Register of Historic Places; CR = California Register of Historical Resources Source: South Coastal Information Center 2018 and December 2024 Sacred Land File Search
On November 23, 2024, the NAHC responded to Rincon’s SLF search request, stating the results of the SLF search were positive. See Attachment 3 for the NAHC response. r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 356
Menifee Mayor and City Council
July 15, 2026
Page
986 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 4 Geoarchaeological Review
Historical Map and Aerial Photograph Review
Historical maps reviewed include the 1865 and 1877 General Land Office plat map (Bureau of Land Management 2024), the 1901 Elsinore, California 30-minute USGS topographic quadrangle, the 1942 15-minute Perris and Murriata, C alifornia USGS topographic quadrangles, and the 1953 Perris and Romoland, California 7.5-minute topographic quadrangles (USGS 2024). Historical aerial photographs of the project site were available for 1938, 1953 (University of California, Santa Barbara 2024), 1966, 1967, 1978, 1985, 1996, 2005, 2010, 2016, 2018, 2020, and 2022 (NETR Online 2024).
The 1865 and 1877 General Land Office plat maps show the project site within the Menifee Valley, immediately east of the San Jacinto Nuevo Land Grant. The maps do not show any development within the project site. The nearest waterway to the project site is the San Jacinto River , which appears on the maps as early as 1865, 1903–1930 topographic maps and is shown approximately 2 miles to the northwest of the project site. The aerial photograph for the year 1938 and 1942 and 1953 topographic maps show the roadway adjacent to the project site to b e generally consistent with the layout of present-day Watson Road and Trumble Road . Between 1938 , and well into the early 1960s, topographic maps and aerial photographs show the project site and its vicinity as agricultural land. By 1967, the project site was graded and changed from agricultural use to soil mining. The aerial photographs for the years ranging from 1970 to 1990s depict the open mining pit operations. The soil mining activity continued on the project site until 2018 , when the pit restoration project started .
Overall, the project site has been subject to agricultural use, and excavations of the Trumble Road Open Pit mining activities. The 2022 photograph depicts the project site’s current condition following the restoration of the open pit and leveling of the site (NETR Online 2024).
Geologic Map Review
The project site is situated in the Peninsular Ranges, one of the 11 major geomorphic provinces in California (California Geological Survey 2002). The Peninsular Ranges consist of northwest-southeast trending mountain ranges and faults (Norris and Webb 1976). These mountains are comprised of Mesozoic to Cenozoic plutonic and extrusive igneous and Cretaceous marine sedimentary rocks.
Specifically, the project site is located in the Perris Valley, which is part of the Perris Block, a geophysical block with low topographic relief which is bounded to the west by the Elsinore Fault Zone and to the east by the San Jacinto Fault Zone (Morton and Miller 2006).
The project site is situated at an elevation of 1,420 feet above mean sea level. The San Jacinto River approximately 2 miles to the west is nearest water source to the project site. the river’s headwaters are in the Santa Rosa Mountains and San Jacinto Mountains and northwestern until they empty into Lake Elsinore.
Geologic mapping indicates Quaternary old alluvial fan deposits (Qof) dating to the late to middle Pleistocene epoch (2.58 million years to 11,700 years ago) are mapped at the surface within the project. Quaternary old alluvial fan deposits consist of reddish-brown, moderately to well-consolidated, silt, sand, and gravel, (Morton and Miller 2006). The age of this formation largely pre -dates human occupation of the area. The entire project site has been heavily disturbed and modified by the previous mining operation and soil hauling, which resulted in the removal of native soils through the process of soil import and export as early as 1966 through 2018, this was followed by the Trumble Road Open Pit restoration project, which started in 2019 and involved cut and filling the project site with import soils to restore the open pit and level the site surface. Due to the age of the formation and the extent of disturbances, the likelihood of encountering surface or subsurface archaeological materials is low. r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 357
Menifee Mayor and City Council
July 15, 2026
Page
987 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 5 Conclusions and Recommendations
The project proposes the construction of a warehouse building and associated office and parking space. Ground-disturbing excavations associated with the project development may reach the depth of 8 feet for utility line trenching. Excavation for stormwater infrastructure may reach maximum depth of to 20 feet below the current ground surface.
No prehistoric or historic -period archaeological resources were identified within the project site. The geoarchaeological review suggests the likelihood for encountering surface or subsurface archaeological resources is low given the age of the geologic unit mapped at surface within the project site and the previous disturbances by the mining pit operation and restoration. As such, project-related ground disturbance is not likely to encounter intact archaeological resources that may qualify as historical resources or unique archaeological resources pursuant to CEQA, However, unanticipated discoveries during construction rema in a possibility. Rincon presents the following recommended mitigation measure for unanticipated discoveries during construction. With adherence to this measure, Rincon recommends a finding of less-than-significant impact with mitigation for archaeological resources under CEQA.
Unanticipated Discovery of Cultural Resources
In the event that archaeological resources are unexpectedly encountered during ground -disturbing activities, work within 50 feet of the find shall halt, and an archaeologist meeting the Secretary of the Interior’s Professional Qualifications Standards for Archaeology (National Park Service 1983) shall be contacted immediately to evaluate the resource. If the resource is determined by the qualified archaeologist to be prehistoric, then a Native American representative shall also be contacted to participate in the evaluation of the resource. If the qualified archaeologist and/or Native American representative determines it to be appropriate, archaeological testing for CRHR eligibility shall be completed. If the resource proves to be eligible for the CRHR and s ignificant impacts to the resource cannot be avoided via project redesign, a qualified archaeologist shall prepare a data recovery plan tailored to the physical nature and characteristics of the resource, per the requirements of C alifornia Code of Regulations Section 15126.4(b)(3)(C). The data recovery plan shall identify data recovery excavation methods, measurable objectives, and data thresholds to reduce any significant impacts to cultural resources related to the resource. Pursuant to the data recovery pla n, the qualified archaeologist and Native American representative, as appropriate, shall recover and document the scientifically consequential information that justifies the resource’s significance. The City shall review and approve the treatment plan a nd archaeological testing as appropriate, and the resulting documentation shall be submitted to the regional repository of the CHRIS, per C alifornia Code of Regulations Section 15126.4(b)(3)(C).
Human Remains
No human remains are known to be present within the project site. However, the discovery of human remains is always a possibility during ground -disturbing activities. If human remains are found, the State of California Health and Safety Code Section 7050.5 states that no further disturbance shall occur until the County Coroner has made a determination of origin and disposition pursuant to Public Resources Code Section 5097.98. In the event of an unanticipated discovery of human remains, the County Coroner must be notified immediately. If the human remains are determined to be of Native American origin, the Coroner will notify the NAHC, which will determine and notify a most likely descendant (MLD). The MLD has 48 hours from being granted site access to make recommendations for the disposition of the remains. If the MLD does not make recommendations within 48 hours, the landowner shall reinter the remains in an area of the property secure from subsequent disturbance. r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 358
Menifee Mayor and City Council
July 15, 2026
Page
988 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 6 With adherence to existing regulations, Rincon recommends a finding of less -than-significant impact to human remains under CEQA.
Should you have any questions concerning this study, please do not hesitate to contact Kholood Abdo at 951-405-2351 or [email protected].
Sincerely,
Rincon Consultants, Inc.
Kholood Abdo, MA, RPA
Senior Supervising Archaeologist
Monica Strauss, MA, RPA
Senior Principal
Attachments
Attachment 1 Figures
Attachment 2 California Historic Resources Information System Search Results Attachment 3 Sacred Lands File Search Results
r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 359
Menifee Mayor and City Council
July 15, 2026
Page
989 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 7 References
Bureau of Land Management
1856 Township 5 south, Range 3 West. San Bernardino Mer. Electronic Map accessed November
2024.https://glorecords.blm.gov/details/survey/default.aspx?dm_id=290679&sid=5pq mipkz.s20#surveyDetailsTabIndex=1
1877 Township 5 south, Range 3 West. San Bernardino Mer. Electronic Map accessed Novemberhttps://glorecords.blm.gov/details/survey/default.aspx?dm_id=290685&sid= 5pqmipkz.s20#surveyDetailsTabIndex=1
California Geologic Survey
2002 California Geomorphic Provinces. Note 36.
City of Menifee
2018 Trumble Road Open Pit Restoration Project Initial Study Mitigated Negative Declaration.
Planning Case Number GR 2017-361. City of Menifee, Community Development Department.
Morton, D.M. and Miller, F.K
2006 Geologic map of the San Bernardino and Santa Ana 30' x 60' quadrangles, California.
U.S. Geological Survey, Open-File Report OF-2006-1217, scale 1:100,000. https://ngmdb.usgs.gov/Prodesc/proddesc_78686.htm (accessed November 2024).
Morton, D.M., Bovard, K.R., and Morton, G.
2003 Geologic map and digital database of the Romoland 7.5' quadrangle, Riverside County, California. U.S. Geological Survey, Open-File Report OF-2003-102, scale 1:24,000. https://ngmdb.usgs.gov/Prodesc/proddesc_54569.htm (accessed January 2019).
NETR Online
2024 Historic Aerials. Aerial photography depicting subject site dated 1966, 1967, 1978, 1985, 1996, 2005, 2010, 2016, 2018, 2020, and 2022 Electronic resource. https://www.historicaerials.com/viewer (accessed November 2024).
Norris, R. M. and Webb, R. W.
1990 Geology of California. John Wiley and Sons, Inc. New York.
United States Geological Survey (USGS)
1901 Elsinore, California, 1:25,000 Topographic Map. Accessed November 2024. https://ngmdb.usgs.gov/topoview/viewer/.
1942a Murriata, California, 1: 625,00 Topographic Map. Accessed November 2024. https://ngmdb.usgs.gov/topoview/viewer/.
1942b Perris, California, 1: 625,00 Topographic Map. Accessed November 2024. https://ngmdb.usgs.gov/topoview/viewer/.
1953a Romoland, California, 1:24000 Topographic Map. Accessed November 2024. https://ngmdb.usgs.gov/topoview/viewer/.
r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 360
Menifee Mayor and City Council
July 15, 2026
Page
990 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 8 1953b Perris, California, , 1:24000 Topographic Map. Accessed November 2024. https://ngmdb.usgs.gov/topoview/viewer/.
University of California, Santa Barbara
1938a Flight ID:AXM-1938a, Frame 48-57.
https://mil.library.ucsb.edu/ap_indexes/FrameFinder/. Accessed November 2024). 1953 Flight ID: AXM-1953, Frame 2k-116.
https://mil.library.ucsb.edu/ap_indexes/FrameFinder/. Accessed November 2024). r
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 361
Menifee Mayor and City Council
July 15, 2026
Page
991 of 3153
Attachment 1
Figures
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 362
Menifee Mayor and City Council
July 15, 2026
Page
992 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 1-1
Figure 1 Regional Location
r
16 ..
Basemap provided by Notiona l Geographi c Society, Esri and t~eir /;censors © 2024 . Romo/and Quadrangle. T055 R032 510. The topog rophic represe ntation depicted in this map may not portra'j all of t/Je features currenrly found in rhe vicinity rodo-y· and/or f eorures depicred in rhis map may hm,e changed since the original topogr aphic moo was assembled. !c=::J) Project Location
0 1,000 2,000 Feet N
A
15 Edw.1rd~/l.r
1◄ Force B.;~I!
Lancaster
Palmdale
Ci;1nt.:1 Cl;1rit;i An~clcs
Simi _ Nanora
Valley ~ Fcrert
I§
Victorvil le
Los
Ange les Ontar io
Riverside &)
Anaheim Coronil *
Sc1ntd A11c1
Murrieta
Oceanside
San Diego
·> I
Twent'(l'\lne P:ilm1
Manne Corps
... ,
y
..
JoshJ3 Tree
Nd<ionc1I
W Park
. • • I
• . • • I
• • •
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 363
Menifee Mayor and City Council
July 15, 2026
Page
993 of 3153
City of Menifee
Cultural Resources Assessment for the Trumble and Watson Warehouse Project 1-2
Figure 2 Project Location
r
Proje ct Boundary
275
Feet
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 364
Menifee Mayor and City Council
July 15, 2026
Page
994 of 3153
Attachment 2
California Historic Resources Information System Search Results Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 365
Menifee Mayor and City Council
July 15, 2026
Page
995 of 3153
Report List
Report No. Year Title AffiliationAuthor(s) ResourcesOther IDs RI-02475 1989 A Cultural Resource Inventory of the Menifee North Project, Near Hemet, California
Christopher E. DroverChristopher E. Drover 33-000978, 33-001175, 33-002607, 33-003714
NADB-R - 1082968;
Voided - MF-2707
RI-02476 1990 A Cultural Resource Inventory: An Addendum to the Menifee North Project near Hemet,
California.
Christopher E. Drover, PhDChristopher E. Drover,
PhD
NADB-R - 1083236;
Voided - MF-2707
RI-04130 1998 CULTURAL RESOURCES RECORDS
SEARCH AND SURVEY REPORT FOR A
PACIFIC BELL MOBILE SERVICES
TELECOMMUNICATIONS FACILITY: CM
125-21 CITY OF PERRIS, CALIFORNIA
CHAMBERS GROUP, INC.MASON, ROGER,
PHILIPPE LAPIN, and
WAYNE H. BONNER
NADB-R - 1085318;
Voided - MF-4605
RI-04474 2001 CULTURAL RESOURCES SURVEY AND
ASSESSMENT OF APPROXIMATELY 2.0
ACRES: HCI INCORPORATED 25201A
TRUMBLE ROAD PROJECT, PERRIS,
RIVERSIDE COUNTY, CALIFORNIA
GREAT LAKES RESEARCHROBINSON, MARK C.NADB-R - 1085835;
Submitter - 01-3
RI-04894 2005 A PHASE I ARCHAEOLOGICAL SURVEY
REPORT ON APNS 327-220-005 & -012 TO -
016, +68 ACRES, CITY OF PERRIS,
RIVERSIDE COUNTY, CALIFORNIA
L&L ENVIRONMENTAL,
INC.
HOOVER, ANNA M. and
WILLIAM R. GILLEAN
NADB-R - 1086261;
Submitter - CAP-05-
652.ARS
RI-05799 2004 CULTURAL RESOURCE ASSESSMENT
FOR AT&T WIRELESS FACILITY 950-031-
034A, LOCATED AT 25110 TRUMBLE
ROAD, CITY OF ROMOLAND, RIVERSIDE
COUNTY, CALIFORNIA
KYLE CONSULTINGKYLE, CAROLYN E. 33-028179NADB-R - 1087162 RI-06018 2003 Historical/Archaeological Resources Survey Report: Menifee Valley North Drainage
Facilities Project, In and Near the
Communities of Romoland and Homeland,
Riverside County, California
CRM TECHBai Tang, Michael
Hogan, Mariam Dahdul,
and Daniel Ballester
NADB-R - 1087381;
Submitter - 1104
RI-06239 2004 HISTORICAL/ARCHAEOLOGICAL
RESOURCES SURVEY REPORT,
ASSESSOR PARCEL NUMBER 329-030-
051, NEAR THE UNINCORPORATED
COMMUNITY OF ROMOLAND, RIVERSIDE
COUNTY, CALIFORNIA
CRM TECHTANG, BAI, MICHAEL
HOGAN, and JOSH
SMALLWOOD
NADB-R - 1087602;
Submitter - CRM
TECH CONTRACT
#1281
RI-06355 2004 HISTORICAL/ARCHAEOLOGICAL
RESOURCES SURVEY REPORT: PERRIS
VALLEY RWRF EXPANSION, IN THE CITY
OF PERRIS, RIVERSIDE COUNTY, CA
CRM TECHTANG, BAI, MICHAEL
HOGAN, and MATTHEW
WETHERBEE
NADB-R - 1087718;
Submitter -
CONTRACT #1380
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 366
Menifee Mayor and City Council
July 15, 2026
Page
996 of 3153
Report List
Report No. Year Title AffiliationAuthor(s) ResourcesOther IDs RI-06888 2006 Cultural Resources Assessment of the Valley- Ivyglen Transmission Line Project, Riverside
County, California
Statistical Research, Inc.Lerch, Michael K. and
Gray, Marlesa A.
33-015346, 33-015347, 33-015348,
33-015349, 33-015350, 33-015351,
33-015352, 33-015353, 33-015354,
33-015355, 33-015356, 33-015357,
33-015358, 33-015359, 33-015360,
33-015361, 33-015362, 33-015363,
33-015364, 33-015365, 33-015375,
33-015376, 33-015377, 33-015378,
33-015379, 33-015380, 33-015416,
33-015417, 33-015418, 33-015419,
33-015420, 33-015422, 33-015423,
33-015424, 33-015425, 33-015427
Submitter - 06-63
RI-07397 2006 Phase I Cultural Resources Assessment with Paleontological Records Review CP Business
Center Romoland Area, Riverside County,
California
MBALord, Kenneth J.
RI-07407 2007 A Phase I Cultural Resources Assessment of APN 329-030-012 Thru 016, +- 5.0 Acres of
Land in Romoland Riverside County,
California, USGS Romoland, California
Quadrangle, 7.5' Series
Jean A. Keller Jean A. Keller
RI-08396 2010 Cultural Resources Report for the Sun City Force Main and Recycled Water Project,
Riverside County, California.
Applied EarthWorks, Inc.Joan George and Dennid
McDougall
RI-08770 2011 Archaeological Survey Report for SCE's Idle Facilities Removal Project
TD# 525428Jay K. Sanders
RI-08981 2013 Summary Class III Cultural Resource
Inventory, Proposed Southern California
Edison Devers-Palo Verde 2 500kV
Transmission Line Project, Riverside County,
California
ASM AffiliatesMatthew M. DeCarlo,
Scott C. Justus, and
William T. Eckhardt
33-001383, 33-001811, 33-013572,
33-013576, 33-013588, 33-013589,
33-018117, 33-018118, 33-018119,
33-018120, 33-018121, 33-018137,
33-018138, 33-018150, 33-018153,
33-018157, 33-018158, 33-018166,
33-018171, 33-018172, 33-018175,
33-018178
Submitter - Project
No. 16720.00
RI-09002 2014 Letter Report: Update to Historical/
Archaeological Resources Survey Report:
Menifee Valley North Drainage Facilities
Project, Cities of Menifee and Perris;
Unincorporated Homeland and Romoland
Areas, Riverside County, California, CRM
TECH Contract No. 1104/2771
CRM TECHBai "Tom" Tang 33-015743, 33-020504, 33-020644
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 367
Menifee Mayor and City Council
July 15, 2026
Page
997 of 3153
Report List
Report No. Year Title AffiliationAuthor(s) ResourcesOther IDs RI-10461 2015 Archaeological Investigations and Monitoring for the Construction of the Devers-Palo Verde
No. 2 Transmission Line Project, Riverside
County, California
ASM AffiliatesWilliam T. Eckhardt,
Matthew M. DeCarlo,
Doug Mengers, Sherri
Andrews, Don Laylander,
and Tony Quach
33-018128, 33-020289, 33-020290,
33-020294, 33-020317, 33-020318,
33-020319, 33-020320, 33-020321,
33-020322, 33-020323, 33-020324,
33-020325, 33-020336, 33-020409,
33-020410, 33-020975, 33-020976,
33-020977, 33-020978, 33-020979,
33-021001, 33-021014, 33-022103,
33-022105, 33-023799
Other - 18142.00
RI-11363 2024 Cultural Resources Studt Update for the
Ethanaz and Case Project, City of Perris,
Riverside County, California APNs 327-220-
012 and -044
BFSA Environmental
Services
Andrew J. Garrison
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 368
Menifee Mayor and City Council
July 15, 2026
Page
998 of 3153
Attachment 3
Sacred Lands File Search Results
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 369
Menifee Mayor and City Council
July 15, 2026
Page
999 of 3153
STATE OF CALIFORNIA Gavin Newsom, Governor
NATIVE AMERICAN HERITAGE COMMISSION
November 23, 2024
Kholood Abdo
Rincon Consultants, Inc.
Via Email to: [email protected]
Re: Native American Tribal Consultation, Pursuant to the Assembly Bill 52 (AB 52), Amendments to the California Environmental Quality Act (CEQA) (Chapter 532, Statutes of 2014), Public Resources Code Sections 5097.94 (m), 21073, 21074, 21080.3.1, 21080.3.2, 21082.3, 21083.09, 21084.2 and 21084.3, Trumble and Watson Warehouse Project, Riverside County To Whom It May Concern:
Pursuant to Public Resources Code section 21080.3.1 (c), attached is a consultation list of tribes that are traditionally and culturally affiliated with the geographic area of the above-listed project. Please note that the intent of the AB 52 amendments to CEQA is to avoid and/or mitigate impacts to tribal cultural resources, (Pub. Resources Code §21084.3 (a)) (“Public agencies shall, when feasible, avoid damaging effects to any tribal cultural resource.”) Public Resources Code sections 21080.3.1 and 21084.3(c) require CEQA lead agencies to consult with California Native American tribes that have requested notice from such agencies of proposed projects in the geographic area that are traditionally and culturally affiliated with the tribes on projects for which a Notice of Preparation or Notice of Negative Declaration or Mitigated Negative Declaration has been filed on or after July 1, 2015. Specifically, Public Resources Code section 21080.3.1 (d) provides:
Within 14 days of determining that an application for a project is complete or a decision by a public agency to undertake a project, the lead agency shall provide formal notification to the designated contact of, or a tribal representative of, traditionally and culturally affiliated California Native American tribes that have requested notice, which shall be accomplished by means of at least one written notification that includes a brief description of the proposed project and its location, the lead agency contact information, and a notification that the California Native American tribe has 30 days to request consultation pursuant to this section.
The AB 52 amendments to CEQA law does not preclude initiating consultation with the tribes that are culturally and traditionally affiliated within your jurisdiction prior to receiving requests for notification of projects in the tribe’s areas of traditional and cultural affiliation. The Native American Heritage Commission (NAHC) recommends, but does not require, early consultation as a best practice to ensure that lead agencies receive sufficient information about cultural resources in a project area to avoid damaging effects to tribal cultural resources.
The NAHC also recommends, but does not require that agencies should also include with their notification letters, information regarding any cultural resources assessment that has been completed on the area of potential effect (APE), such as:
1. The results of any record search that may have been conducted at an Information Center of the California Historical Resources Information System (CHRIS), including, but not limited to:
CHAIRPERSON
Reginald Pagaling
Chumash
VICE-CHAIRPERSON
Buffy McQuillen
Yokayo Pomo, Yuki,
Nomlaki
SECRETARY
Sara Dutschke
Miwok
PARLIAMENTARIAN
Wayne Nelson
Luiseño
COMMISSIONER
Isaac Bojorquez
Ohlone-Costanoan
COMMISSIONER
Stanley Rodriguez
Kumeyaay
COMMISSIONER
Laurena Bolden
Serrano
COMMISSIONER
Reid Milanovich
Cahuilla
COMMISSIONER
Bennae Calac
Pauma-Yuima Band of
Luiseño Indians
ACTING EXECUTIVE
SECRETARY
Steven Quinn
NAHC HEADQUARTERS
1550 Harbor Boulevard
Suite 100
West Sacramento,
California 95691
(916) 373-3710
[email protected]
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 370
Menifee Mayor and City Council
July 15, 2026
Page
1000 of 3153
• A listing of any and all known cultural resources that have already been recorded on or adjacent to the APE, such as known archaeological sites;
• Copies of any and all cultural resource records and study reports that may have been provided by the Information Center as part of the records search response; • Whether the records search indicates a low, moderate, or high probability that unrecorded cultural resources are located in the APE; and
• If a survey is recommended by the Information Center to determine whether previously unrecorded cultural resources are present.
2. The results of any archaeological inventory survey that was conducted, including:
• Any report that may contain site forms, site significance, and suggested mitigation measures.
All information regarding site locations, Native American human remains, and associated funerary objects should be in a separate confidential addendum, and not be made available for public disclosure in accordance with Government Code section 6254.10.
3. The result of the Sacred Lands File (SLF) check conducted through the Native American Heritage Commission was positive. Please contact the Pechanga Band of Indians on the attached list for more information.
4. Any ethnographic studies conducted for any area including all or part of the APE; and
5. Any geotechnical reports regarding all or part of the APE.
Lead agencies should be aware that records maintained by the NAHC and CHRIS are not exhaustive and a negative response to these searches does not preclude the existence of a tribal cultural resource. A tribe may be the only source of information regarding the existence of a tribal cultural resource.
This information will aid tribes in determining whether to request formal consultation. In the event that they do, having the information beforehand will help to facilitate the consultation process.
If you receive notification of change of addresses and phone numbers from tribes, please notify the NAHC. With your assistance, we can assure that our consultation list remains current.
If you have any questions, please contact me at my email address: [email protected].
Sincerely,
Cody Campagne
Cultural Resources Manager
Attachment
t
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 371
Menifee Mayor and City Council
July 15, 2026
Page
1001 of 3153
County Tribe Name Fed (F)
Non-Fed (N)
Contact Person Contact Address Phone # Fax # Email Address Cultural Affiliation Agua Caliente Band of Cahuilla Indians F Lacy Padilla, Director of Historic Preservation/THPO
5401 Dinah Shore Drive
Palm Springs, CA, 92264
(760) 333-5222 (760) 699-6919 [email protected] Cahuilla Augustine Band of Cahuilla Indians F Tribal Operations, 84-001 Avenue 54 Coachella, CA, 92236
(760) 398-4722 [email protected] Cahuilla
Cabazon Band of Cahuilla Indians F Doug Welmas, Chairperson 84-245 Indio Springs Parkway Indio, CA, 92203
(760) 342-2593 (760) 347-7880 [email protected] Cahuilla Cahuilla Band of Indians F Erica Schenk, Chairperson 52701 CA Highway 371 Anza, CA, 92539
(951) 590-0942 (951) 763-2808 [email protected] Cahuilla Cahuilla Band of Indians F BobbyRay Esparza, Cultural
Director
52701 CA Highway 371
Anza, CA, 92539
(951) 763-5549 [email protected] Cahuilla
Cahuilla Band of Indians F Anthony Madrigal, Tribal Historic Preservation Officer
52701 CA Highway 371
Anza, CA, 92539
(951) 763-5549 [email protected] Cahuilla
Los Coyotes Band of Cahuilla and Cupeño
Indians
F Ray Chapparosa, Chairperson P.O. Box 189
Warner Springs, CA, 92086-0189
(760) 782-0711 (760) 782-0712 Cahuilla
Cupeno
Morongo Band of Mission Indians F Robert Martin, Chairperson 12700 Pumarra Road Banning, CA, 92220
(951) 755-5110 (951) 755-5177 [email protected] Cahuilla Serrano
Morongo Band of Mission Indians F Ann Brierty, THPO 12700 Pumarra Road Banning, CA, 92220
(951) 755-5259 (951) 572-6004 [email protected] Cahuilla Serrano
Pala Band of Mission Indians F Shasta Gaughen, Tribal Historic Preservation Officer
PMB 50, 35008 Pala Temecula
Road
Pala, CA, 92059
(760) 891-3515 [email protected] Cupeno
Luiseno
Pala Band of Mission Indians F Christopher Nejo, Legal
Analyst/Researcher
PMB 50, 35008 Pala Temecula
Road
Pala, CA, 92059
(760) 891-3564 [email protected] Cupeno
Luiseno
Pala Band of Mission Indians F Alexis Wallick, Assistant THPO PMB 50, 35008 Pala Temecula Road
Pala, CA, 92059
(760) 891-3537 [email protected] Cupeno
Luiseno
Pechanga Band of Indians F Tuba Ebru Ozdil, Pechanga
Cultural Analyst
P.O. Box 2183
Temecula, CA, 92593
(951) 770-6313 (951) 695-1778 [email protected] Luiseno Pechanga Band of Indians F Steve Bodmer, General Counsel for Pechanga Band of Indians
P.O. Box 1477
Temecula, CA, 92593
(951) 770-6171 (951) 695-1778 [email protected] Luiseno Quechan Tribe of the Fort Yuma
Reservation
F Jill McCormick, Historic
Preservation Officer
P.O. Box 1899
Yuma, AZ, 85366
(928) 261-0254 historicpreservation@quechantrib
e.com
Quechan
Quechan Tribe of the Fort Yuma
Reservation
F Jordan Joaquin, President,
Quechan Tribal Council
P.O.Box 1899
Yuma, AZ, 85366
(760) 919-3600 executivesecretary@quechantribe
.com
Quechan
Quechan Tribe of the Fort Yuma
Reservation
F Manfred Scott, Acting Chairman -
Kw'ts'an Cultural Committee
P.O. Box 1899
Yuma, AZ, 85366
(928) 210-8739 culturalcommittee@quechantribe.
com
Quechan
Ramona Band of Cahuilla F Joseph Hamilton, Chairperson P.O. Box 391670 Anza, CA, 92539
(951) 763-4105 (951) 763-4325 [email protected] Cahuilla Rincon Band of Luiseno Indians F Denise Turner Walsh, Attorney General
One Government Center Lane
Valley Center, CA, 92082
(760) 689-5727 [email protected] Luiseno
Rincon Band of Luiseno Indians F Joseph Linton, Tribal
Council/Culture Committee
Member
One Government Center Lane
Valley Center, CA, 92082
(760) 803-3548 [email protected] Luiseno
Rincon Band of Luiseno Indians F Cheryl Madrigal, Cultural Resources Manager/Tribal
Historic Preservation Officer
One Government Center Lane
Valley Center, CA, 92082
(760) 648-3000 [email protected] Luiseno
Rincon Band of Luiseno Indians F Laurie Gonzalez, Tribal Council/Culture Committee
Member
One Government Center Lane
Valley Center, CA, 92082
(760) 484-4835 [email protected] Luiseno
Santa Rosa Band of Cahuilla Indians F Vanessa Minott, Tribal Administrator
P.O. Box 391820
Anza, CA, 92539
(951) 659-2700 (951) 659-2228 [email protected] Cahuilla Santa Rosa Band of Cahuilla Indians F Steven Estrada, Tribal Chairman P.O. Box 391820 Anza, CA, 92539
(951) 659-2700 (951) 659-2228 [email protected] Cahuilla Soboba Band of Luiseno Indians F Jessica Valdez, Cultural Resource Specialist
P.O. Box 487
San Jacinto, CA, 92581
(951) 663-6261 (951) 654-4198 [email protected] Cahuilla Luiseno
Soboba Band of Luiseno Indians F Joseph Ontiveros, Tribal Historic Preservation Officer
P.O. Box 487
San Jacinto, CA, 92581
(951) 663-5279 (951) 654-4198 [email protected] Cahuilla Luiseno
Torres-Martinez Desert Cahuilla Indians F Alesia Reed, Cultural Committee Chairwoman
P.O. Box 1160
Thermal, CA, 92274
(760) 397-0300 [email protected] Cahuilla
Torres-Martinez Desert Cahuilla Indians F Gary Resvaloso, TM MLD P.O. Box 1160 Thermal, CA, 92274
(760) 777-0365 [email protected] Cahuilla
Torres-Martinez Desert Cahuilla Indians F Thomas Tortez, Chairperson P.O. Box 1160 Thermal, CA, 92274
(760) 397-0300 (760) 397-8146 [email protected] Cahuilla Torres-Martinez Desert Cahuilla Indians F Abraham Becerra, Cultural Coordinator
P.O. Box 1160
Thermal, CA, 92274
(760) 397-0300 [email protected] Cahuilla
Torres-Martinez Desert Cahuilla Indians F
Mary Belardo, Cultural Committee
Vice Chair
P.O. Box 1160
Thermal, CA, 92274
(760) 397-0300 [email protected] Cahuilla
Native American Heritage Commission
Native American Contact List
Riverside County
11/23/2024
Counties Last Updated
Riverside Imperial,Riverside,San Bernardino,San Diego 1/11/2024 Imperial,Riverside,San Bernardino,San Diego 4/18/2024
Imperial,Riverside,San Bernardino,San Diego
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
2/1/2024
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
6/28/2023
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
6/28/2023
Imperial,Riverside,San Bernardino,San Diego
Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
Orange,Riverside,San Bernardino,San Diego 11/27/2023
Orange,Riverside,San Bernardino,San Diego 11/27/2023
Orange,Riverside,San Bernardino,San Diego 11/27/2023
Los Angeles,Orange,Riverside,San
Bernardino,San Diego,Santa Barbara,Ventura
8/2/2023
Los Angeles,Orange,Riverside,San
Bernardino,San Diego,Santa Barbara,Ventura
8/2/2023
Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
5/16/2023
Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
5/16/2023
Imperial,Kern,Los Angeles,Riverside,San
Bernardino,San Diego
5/16/2023
Imperial,Riverside,San Bernardino,San Diego
Los Angeles,Orange,Riverside,San
Bernardino,San Diego,Santa Barbara,Ventura
7/7/2023
Los Angeles,Orange,Riverside,San
Bernardino,San Diego,Santa Barbara,Ventura
5/31/2023
Los Angeles,Orange,Riverside,San
Bernardino,San Diego,Santa Barbara,Ventura
5/31/2023
Los Angeles,Orange,Riverside,San
Bernardino,San Diego,Santa Barbara,Ventura
5/31/2023
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
4/8/2024
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
4/8/2024
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
7/14/2023
Imperial,Los Angeles,Orange,Riverside,San
Bernardino,San Diego
7/14/2023
Imperial,Riverside,San Bernardino,San Diego 10/30/2023
Imperial,Riverside,San Bernardino,San Diego 10/30/2023
This list is current only as of the date of this document. Distribution of this list does not relieve any person of statutory responsibility as defined in Section 7050.5 of the Health and Safety Code, Section 5097.94 of the Public Resources Code and Section 5097.98 of the Public Resources Code.
This list is only applicable for consultation with Native American tribes under Public Resources Code Sections 21080.3.1 for the proposed Trumble and Watson Warehouse Project, Riverside County.
Record: PROJ-2024-006072
Report Type: AB52 GIS
Counties: Riverside
NAHC Group: All
Imperial,Riverside,San Bernardino,San Diego 10/30/2023
Imperial,Riverside,San Bernardino,San Diego 10/30/2023
Imperial,Riverside,San Bernardino,San Diego 10/30/2023
11/23/2024 09:12 AM
1 of 1
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
t t t t
t t t t
t t t t
+-+-+-+-+-
t t t t
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
t t t t
+-+-+-+-+-
I
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 372
Menifee Mayor and City Council
July 15, 2026
Page
1002 of 3153
Appendix D
Geotechnical Investigation
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 373
Menifee Mayor and City Council
July 15, 2026
Page
1003 of 3153
131 Calle Iglesia, Suite 200, San Clemente, CA 92672 (949) 369-6141 www.lgcgeotechnical.com
May 17, 2022 Project No. 17172-02
Mr. Ted Hart
Lovett Industrial
1730 East Holly Avenue, #808
El Segundo, California 90245
Subject: Updated Geotechnical Recommendations for Proposed Industrial Development, 25630 Trumble Road, Menifee, California
In accordance with your request, LGC Geotechnical, Inc. has prepared this updated geotechnical report regarding the proposed industrial development of the property located at 25630 Trumble Road in Menifee, California.
Should you have any questions regarding this report, please do not hesitate to contact our office. We appreciate this opportunity to be of service.
Respectfully,
LGC Geotechnical, Inc.
Ryan L. Douglas, GE 3147 Kevin B. Colson, CEG 2210
Project Engineer Vice President
KBC/RLD/klr
Distribution: (5) Addresse e (4 wet-signed copies and 1 electronic copy)
LGC
Geatechnical, Inc.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 374
Menifee Mayor and City Council
July 15, 2026
Page
1004 of 3153
Project No. 17172‐02 Page i May 17, 2022
TABLE OF CONTENTS
Section Page
1.0 INTRODUCTION ...................................................................................................................................... 1
1.1 Project Description ....................................................................................................... ............................. 1
1.2 Seismic Design Parameters ................................................................................................. ................... 2
2.0 FINDINGS AND CONCLUSIONS ........................................................................................................... 4
3.0 RECOMMENDATIONS ............................................................................................................................ 5
3.1 Site Earthwork ............................................................................................................ ................................. 5
3.2 Settlement Waiting Pe riod for Deep Fills .......................................................................................... 6
3.2.1 Settlement Monuments and Monitoring ............................................................................. 6
3.2.2 Preliminary Foundation Recommendations .................................................................... 7
3.2.3 Slab Design and Construction ............................................................................................ ..... 7
3.2.4 Foundation De sign Parameters ............................................................................................. 8
3.2.5 Foundation Construction ................................................................................................. ......... 9
3.2.6 Lateral Load Resistance ................................................................................................. ........... 9
3.3 Lateral Earth Pressures for Retaining Walls ............................................................................... ... 9
3.4 Preliminary Asphalt Concre te Pavement Sections ................................................................... 11
3.5 Preliminary Portland Cement Co ncrete Pavement Sections .................................................. 11
3.6 Soil Corrosivity .......................................................................................................... ............................... 13
3.7 Nonstructural Concrete Flatwork ........................................................................................... ......... 13
3.8 Surface Drainage and Landscaping .......................................................................................... ........ 13
3.8.1 Precise Grading ......................................................................................................... ................. 13
3.8.2 Landscaping ............................................................................................................. ................... 14
3.9 Subsurface Water Infiltration ............................................................................................. ............... 14
3.10 Geotechnical Plan Review ................................................................................................. ................... 15
3.11 Geotechnical Observation and Testing During Construction ................................................. 15
4.0 LIMITATIONS ......................................................................................................................................... 16
LIST OF TABLES, ILLUSTRATIONS, & APPENDICES
Tables
Table 1 – Seismic Design Parameters (Page 3)
Table 2 – Allowable Soil Bearing Pressures (Page 8)
Table 3 – Lateral Earth Pressures – Select Sandy Backfill (Page 10) Table 4 – Preliminary Asphalt Concrete Pavement Sections (Page 11) Table 5 – Preliminary PCC Pavement Sections (Page 12)
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 375
Menifee Mayor and City Council
July 15, 2026
Page
1005 of 3153
TABLE OF CONTENTS cont’d
Project No. 17172‐02 Page ii May 17, 2022
Figures
Figure 1 – Site Location Map (Rear of Text)
Figure 2 – Settlement Monument Location Map (Rear of Text) Figure 3 – Retaining Wall Backfill Detail (Rear of Text)
Appendices
Appendix A – References
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 376
Menifee Mayor and City Council
July 15, 2026
Page
1006 of 3153
Project No. 17172‐02 Page 1 May 17, 2022
1.0 INTRODUCTION
LGC Geotechnical has previously performed a geot echnical evaluation of the site and provided geotechnical recommendations for remedial grading and backfill for the open pit restoration at the site (LGC Geotechnical, 2018). We are also providing geotechnical observation and testing services during the in-progress grading operations for the pit backfill. This report has been prepared to provide recommendations for the proposed development of the site at the completion of site grading.
Although recommendations and parameters for site development were provided in our previous report (LGC Geotechnical, 2018), they were conceptual only and were per the 2016 California Building Code (CBC). The recommendation and parameters provided herein are specific to th e current proposed site development and are updated to the 2019 CBC.
This report is not a stand-alone document and must be used in conjunction with the referenced geotechnical report (LGC Geot echnical, 2018) for completeness. In the case of conflict, the recommendations contained herein should supersed e those provided in our previous report. The remaining recommendations provided in our previous geotech nical report (LGC Geotechnical, 2018) remain valid and applicable.
1.1 Project Description
The approximately 17.8-acre, irregular-shaped site is located just southeast of the intersection at Interstate 215 (I-215) and Highway 74 (CA-74). The site is bounded by Trumble Road to the west, an industrial welding building and empty lot to the north, a food waste recycling center to the east, and residential housing to the south (Figure 1). The site was originally used as an open pit mine and more recently was used as a soils and concrete recycling area.
Remedial grading and backfill grading of the pit began in April of 2019. The operations have been performed periodically since then under th e observation and testing services of LGC Geotechnical. The operations to date have been performed in general accordance with the recommendations of the project geotechnical repo rt (LGC Geotechnical, 2018). We understand that ultimately, the pit will be backfilled with compacted fill to the approximate elevation of the adjacent Trumble Road.
Once finish grade has been achieved, we understand that the proposed site development will include precise and post grading for and construction of an approximately 327,865 square-foot, one-story industrial warehouse, associated parking, drive isles, and improvements (HPA, 2022).
We understand that preliminary maximum column and wall structural (dead plus live) loads are estimated to be on the order of 90 kips and 9 kips per lineal foot, respectively.
The recommendations provided in this report are based on preliminary structural loads and grading information as indicated above. LGC Geotechnical should be provided with any updated project information, plans, and/or updated structural loads as they become available in order to either confirm or modify the recommendations provided herein.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 377
Menifee Mayor and City Council
July 15, 2026
Page
1007 of 3153
Project No. 17172‐02 Page 2 May 17, 2022
1.2 Seismic Design Parameters
The site seismic characteristics were evaluated per the guidelines set forth in Chapter 16, Section 1613 of the 2019 California Building Code (CBC) and applicable portions of ASCE 7-16 which has been adopted by the CBC. Please note that the following seismic parameters are only applicable for code-based acceleration response spectra and are not applicable for where site- specific ground motion procedures are required by ASCE 7-16. Representative site coordinates of latitude 33.7485 degrees north and longitude -117.1822 west were utilized in our analysis.
The maximum considered earthquake (MCE) spectral response accelerations (S MS and SM1) and
adjusted design spectral response acceleration parameters (S DS and S D1) for Site Class D are provided in Table 1 on the following page. Si nce site soils are Site Class D, additional adjustments are required to code acceleration response spectrums as outlined below and provided in ASCE 7-16. The structural designer should contact the geotechnical consultant if structural conditions (e.g., number of stories, seismically isolated structures, etc.) require site- specific ground motions.
A deaggregation of the PGA based on a 2,475-year average return period (MCE) indicates that an earthquake magnitude of 6.94 at a distance of approximately 16.21 km from the site would contribute the most to this ground motion (USGS, 2014).
Section 1803.5.12 of the 2019 CBC (per Section 11.8.3 of ASCE 7) states that the maximum considered earthquake geometric mean (MCE
G) Peak Ground Acceleration (PGA) should be
used for liquefaction potential. The PGA M for the site is equal to 0.55g (SEAOC, 2022). The design PGA is equal to 0.37g (2/3 of PGAM).
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 378
Menifee Mayor and City Council
July 15, 2026
Page
1008 of 3153
Project No. 17172‐02 Page 3 May 17, 2022
TABLE 1
Seismic Design Parameters
Selected Parameters from 2019 CBC,
Section 1613 ‐ Earthquake Loads
Seismic Design
Values Notes/Exceptions
Distance to applicable faults classifies the site as a “Near-Fault” site. Section 11.4.1 of ASCE 7
Site Class D* Chapter 20 of ASCE 7
Ss (Risk-Targeted Spectral Acceleration for
Short Periods) 1.424g From SEAOC, 2022
S1 (Risk-Targeted Spectral Accelerations for
1-Second Periods) 0.529g From SEAOC, 2022
Fa (per Table 1613.2.3(1)) 1.000
For Simplified Design Procedure of
Section 12.14 of ASCE 7, Fa shall be
taken as 1.4 (Section 12.14.8.1)
Fv (per Table 1613.2.3(2)) 1.771
Value is only applicable per
requirements/exceptions per
Section 11.4.8 of ASCE 7
SMS for Site Class D
[Note: SMS = FaSS] 1.424g -
SM1 for Site Class D
[Note: SM1 = FvS1] 0.937g
Value is only applicable per
requirements/exceptions per
Section 11.4.8 of ASCE 7
SDS for Site Class D
[Note: SDS = (2/3)SMS] 0.949g -
SD1 for Site Class D
[Note: SD1 = (2/3)SM1] 0.625g
Value is only applicable per
requirements/exceptions per
Section 11.4.8 of ASCE 7
CRS (Mapped Risk Coefficient at 0.2 sec) 0.935 ASCE 7 Chapter 22 CR1 (Mapped Risk Coefficient at 1 sec) 0.918 ASCE 7 Chapter 22 *Since site soils are Site Class D and S 1 is greater than or equal to 0.2, the seismic response coefficient Cs is determined by Eq. 12.8-2 for values of T ≤ 1.5Ts and taken equal to 1.5 times the value calculated in accordance with either Eq. 12.8-3 for TL ≥ T > Ts, or Eq. 12.8-4 for T > TL. Refer to ASCE 7-16.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 379
Menifee Mayor and City Council
July 15, 2026
Page
1009 of 3153
Project No. 17172‐02 Page 4 May 17, 2022
2.0 FINDINGS AND CONCLUSIONS
Based on review of our previous geotechnical evaluation (LGC Geotechnical, 2018), the results of our geotechnical observation and testing services pe rformed to date, and review of the proposed development plan (HPA, 2022), it is our opinion that the proposed site development is feasible from a geotechnical standpoint, provided that the grading operations continue to be performed in accordance with the recommendations of the project geotechnical report (LGC Geotechnica l, 2018) or as revised and/or updated herein. In the case of conflict, the recommendations provided herein shall supersede all previous.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 380
Menifee Mayor and City Council
July 15, 2026
Page
1010 of 3153
Project No. 17172‐02 Page 5 May 17, 2022
3.0 RECOMMENDATIONS
The following recommendations are to be consider ed preliminary and should be confirmed upon completion of earthwork operations. In addition , t h e y s h o u l d b e c o n s i d e r e d m i n i m a l f r o m a geotechnical viewpoint, as there may be more restri ctive requirements from the architect, structural engineer, building codes, governing agencies, or the City. It is the responsibility of the builder to ensure these recommendations are provided to the appropriate parties.
It should be noted that the following geotechnical recommendations are intended to provide sufficient information to develop the site in general accordan ce with the 2019 California Building Code (CBC) requirements. Regarding the potential occurrence of potentially catastrophic geotechnical hazards such as fault rupture, earthquake-induced landslides, liquefaction, etc., the following geotechnical recommendations should provide adequate protecti on for the proposed development to the extent required to reduce seismic risk to an “acceptable leve l.” The “acceptable level” of risk is defined by the California Code of Regulations as “the level that provides reasonable protection of the public safety, though it does not necessarily ensure continued stru ctural integrity and functionality of the project” [Section 3721(a)]. Therefore, repair and remedial work of the proposed improvement may be required after a significant seismic event. With regards to th e potential for less significant geologic hazards to the proposed development, the recommendations co ntained herein are intended as a reasonable protection against the potential damaging effects of geotechnical phenomena such as expansive soils, fill settlement, groundwater seepage, etc. It sh ould be understood, however, that although our recommendations are intended to maintain the struct ural integrity of the proposed development and structures given the site geotechnical conditions, they cannot preclude the potential for some cosmetic distress or nuisance issues to develop as a result of the site geotechnical conditions.
The geotechnical recommendations contained herein must be confirmed to be suitable or modified based on the actual exposed conditions.
3.1 Site Earthwork
We anticipate that earthwork at the site will consist of required earthwork removals, fill placement, and utility line co nstruction and backfill. We recommend that earthwork onsite continue to be performed in accordance with the project geotechnical report (LGC Geotechnical, 2018), 2019 CBC, and City of Menifee requirements. In case of conflict, the following recommendations shall supersede previous recommendations.
As previously recommended; from a geotechnica l viewpoint, “select” import soils would be preferable in the upper 15 feet of the finish surface of the area of proposed development. These soils should consist of clean, relatively granular soils of Very Low expansion potential (expansion index 20 or less based on ASTM D4829) and no particles larger than 3 inches in greatest dimension. Source samples of planned importation of select materials should be provided to the geotechnical consultant for laboratory testing a minimum of 3 working days prior to any planned importation for required laboratory testing. The recommendations and parameters provided herein are contingent upon implementation of this select import. The geotechnical properties of the material placed in the upper 15 feet of site g r a d e s s h o u l d b e c o n f i r m e d p r i o r t o i m p o r t , during site grading and based on laboratory testing of the finish grade soils.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 381
Menifee Mayor and City Council
July 15, 2026
Page
1011 of 3153
Project No. 17172‐02 Page 6 May 17, 2022
3.2 Settlement Waiting Period for Deep Fills
Where overlying deep fills (generally 50 feet d eep or greater), shallow footings and slabs-on- grade foundations should be constructed after a wa iting period to verify that total settlements are within tolerable limits. Please note, that it is very difficult to predict the settlement waiting period.
3.2.1 Settlement Monuments and Monitoring
Fill soils are subject to post-grading settlement. For shallower fills (up to approximately 50 feet deep), fill settlement typically occurs during grading for granular soils, and/or within a few months of the completion of g r a d i n g . L o n g e r s e t t l e m e n t p e r i o d s a r e expected for deeper fill and for those compri sed of finer-grained soils and deeper fills.
This occurs even to properly compacted fill soils over competent removal bottoms.
Development areas above areas of deep fill should not be released for construction until settlement monitoring indicates settlement has diminished to within the tolerable limits for the proposed foundations and other structural improvements.
Settlement monuments must be installed after grading, in order to monitor settlement of deeper fills (approximately 50 feet or deeper). We anticipated that three surface settlement monuments will be required. The monuments should be installed in accordance with the details provided in Appendix C of our referenced report (LGC Geotechnical, 2018). The monuments installation should be performed by or under the observation of the project geotechnical consultant. The approximate locations for recommended monuments are depicted on the attached Settlement Monument Location Map (Figure 2); the actual installation lo cations may vary at the discretion of the geotechnical consultant, based on as-graded conditions. Settlement monuments should be installed as site grading is completed.
At the completion of their construction, the monuments should be surveyed by a licensed surveyor to a fixed benchmark, preferably within Trumble Road. Other locations may be considered but must ultimately be approved by the geotechnical consultant. All survey must be performed by a digital level capable of reading to an accuracy of at least 0.001- foot. The survey must be performed by an experienced surveyor who has previously performed level surveys to this level of precision. The survey must close to 0.004-feet per mile. All surveys must take place early in the morning in good weather for survey work.
The geotechnical consultant will determine the appropriate survey schedule, but the schedule may be varied slightly by the surveyor based on anticipated weather.
The monuments should then be monitored periodically at regular intervals (four times in the first two months, twice in the third mont h, and then once a month thereafter until informed otherwise by the geotechnical consultant). The readings should be provided to this office and continue until total settlements are within tolerable limits. The frequency of the readings may be adjusted during the monitoring period based on results of the readings.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 382
Menifee Mayor and City Council
July 15, 2026
Page
1012 of 3153
Project No. 17172‐02 Page 7 May 17, 2022
3.2.2 Preliminary Foundation Recommendations
The proposed structures may be supported on spread or continuous footings and conventional slabs, provided earthwor k is performed in accordance with the recommendations presented in this report. Since the finish grade site soils are anticipated to be “Very Low” expansion potential (EI of 20 or less per ASTM D4829), special design considerations from a geotechnical perspective are not anticipated, however, this must be verified based on as-graded conditions. Footings should be supported on properly compacted fill. Please note that the fo llowing foundation recommendations are preliminary and must be confirmed by LGC Geotechnical at the completion of grading.
Preliminary foundation recomme ndations are provided in the following sections. The foundation design must be performed by the structural engineer based on the following geotechnical parameters and minimum values provided.
3.2.3 Slab Design and Construction
From a geotechnical perspective, minimum slab thicknesses of 6 inches and 4 inches are recommended for new slabs in the warehouse areas and office areas, respectively. Slabs are to be supported on compacted fill soils properly prepared in accordance with the recommendations provided in this report. Actual slab reinforcement and thickness should be determined by the structural engineer based on the imposed loading.
Additional slab-on-grade recommendations ca n be provided for alternative building types upon request.
The foundation designer may use a modulus of vertical subgrade reaction (k) of 200 pounds per cubic inch (pounds per square inch per inch of deflection). This value is for a 1-foot by 1-foot square loaded area and should be adjusted by the structural designer for the area of the proposed footing using the following formula:
k = 200 x [(B+1)/2B]
2 k = modulus of vertical subgrade reaction, pounds per cubic inch (pci) B = foundation width (feet)
It is recommended that subgrade soils below slabs be moisture conditioned in order to maintain the recommended moisture content up to the time of concrete placement. The recommended moisture content of the slab subgrade soils should be between optimum moisture content and approximately 2 percent above optimum moisture content to a minimum depth of 12 inches. The moisture content of the slab subgrade should be verified by the geotechnical consultant within 1 to 2 days prior to concrete placement.
In addition, this moisture content shou ld be maintained around the immediate perimeter of the slab during construction and up to occupancy of the building structures.
The following recommendations are for informational purposes only, as they are unrelated to the geotechnical performance of the foundation. The following recommendations may be superseded by the foundation engineer and/or owner. Some post-construction moisture migration should be expected below the foundation. In Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 383
Menifee Mayor and City Council
July 15, 2026
Page
1013 of 3153
Project No. 17172‐02 Page 8 May 17, 2022
general, interior floor slabs with moisture sensitive floor coverings should be underlain by a minimum 10 mil thick polyolefin material vapor retarder, which has a water vapor transmission rate (permeance) of less than 0.03 perms. The need for sand and/or the sand thickness (above and/or below the vapor retarder) should be specified by the structural engineer, architect or concrete contactor. The selection and thickness of sand is not a geotechnical engineering issue and is therefore outside our purview.
3.2.4 Foundation Design Parameters
For the proposed industrial warehouse structures, minimum continuous wall and column footing widths are to be 12 inches and 24 inches, respectively, minimum exterior foundation embedment is to extend a minimum of 18 inches below the adjacent exterior grade, and interior column footings should be embedded a minimum of 12 inches beneath the adjacent subgrade. The following allowabl e bearing pressures for both continuous and column spread footings presented in Table 2 below are recommended for corresponding footing widths and embedments.
TABLE 2
Allowable Soil Bearing Pressures
Allowable Static
Bearing Pressure
(psf)
Minimum Footing
Width
(feet)
Minimum Footing
Embedment*
(feet)
3,500 4 2
3,000 3 2
2,500 2 1.5
2,000 1 1.5
* Refers to minimum depth measured below lowest adjacent grade.
These allowable bearing values indicated above (exclusive of the weight of the footings) are for total dead loads and frequently applied live loads and may be increased by ⅓ for short duration loading (i.e., wind or seismic loads). The allowable bearing pressures are applicable for level (ground slope equal to or flatter than 5H:1V) conditions only.
In utilizing the above-mentioned allowable bearing capacity and provided our earthwork recommendations are implemented, foundation settlement due to structural loads is anticipated to be on the order of 1-inch. Differential static settlement may be taken as half of the static settlement (i.e., ½-inch over a horizontal span of 40 feet). Liquefaction recommendations are provided in referen ce geotechnical report (LGC Geotechnical, 2018). Liquefaction potential and potential for liquefaction-induced settlement is considered very low.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 384
Menifee Mayor and City Council
July 15, 2026
Page
1014 of 3153
Project No. 17172‐02 Page 9 May 17, 2022
3.2.5 Foundation Construction
The foundation is to be excavated into compet ent compacted artificial fill placed during grading operations. It is recommended that the foundation subgrade soils be evaluated by the geotechnical engineer prior to steel and/or concrete placement.
The geotechnical parameters provided herein assume that if the areas adjacent to the foundations are planted and irrigated, these areas will be designed with proper drainage and adequately maintained so that ponding, which causes significant moisture changes below the foundation, does not occur. Our recommendations do not account for excessive irrigation and/or incorrect landscape design. Plants should only be provided with sufficient irrigation for life and not overwatered to saturate subgrade soils. Sunken planters placed adjacent to the foundation should either be designed with an efficient drainage system or liners to prevent moisture infiltration below the foundation.
3.2.6 Lateral Load Resistance
Resistance to lateral loads can be provided by friction acting at the base of foundations and by passive earth pressure. For concrete /soil frictional resi stance, an allowable coefficient of friction of 0.35 may be assumed with dead-load forces. An allowable passive lateral earth pressure of 250 psf per foot of depth (or pcf) to a maximum of 2,500 psf may be used for the sides of footings poured against properly compacted fill. Allowable passive pressure may be in creased to 340 pcf (maximum of 3,400 psf) for short duration seismic loading. This passive pre ssure is applicable for level (ground slope equal to or flatter than 5H:1V) conditions. Frictional resistance and passive pressure may be used in combination without reduction. We recommend that the upper foot of passive resistance be neglected if finished grade will not be covered with concrete or asphalt. The provided allowable passive pressures are based on a factor of safety of 1.5 and 1.1 for static and seismic loading conditions, respectively.
3.3 Lateral Earth Pressures for Retaining Walls
The following preliminary lateral earth pressures may be used for any minor site retaining walls 8 feet or less. Lateral earth pressures are provided as equivalent fluid unit weights, in pound per square foot (psf) per foot of depth or pcf. Thes e values do not contain an appreciable factor of safety, so the retaining wall design er should apply the applicable factors of safety and/or load factors during design.
The following lateral earth pressures are presented on Table 3 on the following page for approved select granular soils with a maximum of 35 percent fines (passing the No. 200 sieve per ASTM D-421/422) and Very Low expansion potential (EI of 20 or less per ASTM D4829). The wall designer should clearly indicate on the retaining wall plans the required sandy soil backfill criteria.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 385
Menifee Mayor and City Council
July 15, 2026
Page
1015 of 3153
Project No. 17172‐02 Page 10 May 17, 2022
TABLE 3
Lateral Earth Pressures – Select Sandy Backfill
Conditions
Equivalent Fluid Unit Weight (pcf)
Level Backfill 2:1 Backfill Sloping
Upwards
Sandy Backfill Sandy Backfill
Active 35 55
At-Rest 55 75
If the wall can yield enough to mobilize the full shear strength of the soil, it can be designed for “active” pressure. If the wall cannot yield under the applied load, the earth pressure will be higher. Such walls should be designed for “at-rest.” The equivalent fluid pressure values assume free-draining conditions. Retaining wall structures should be provided with appropriate drainage and appropriately waterproofed (Refer to Figure 3). Please note that waterproofing and outlet systems are not the purview of the geotechnical consultant. If conditions other than those assumed above are anticipated, the equivalent flui d pressure values should be provided on an individual-case basis by the geotechnical consultant.
Surcharge loading effects from any adjacent structures should be evaluated by the retaining wall designer. In general, structural loads within a 1:1 (horizontal to vertical) upward projection from the bottom of the proposed retaining wall footing will surcharge the proposed retaining structure. In addition to the recommended eart h pressure, retaining walls adjacent to streets should be designed to resist vehicular traffic if applicable. Uniform surcharges may be estimated using the applicable coefficient of lateral earth pressure using a rectangular distribution. A factor of 0.5 and 0.33 may be used for at-rest and active conditions, respectively. The vertical traffic surcharge may be determined by the structural designer. The structural designer should contact the geotechnical engineer for an y required geotechnical input in estimating any applicable surcharge loads.
If required, the retaining wall designer may use a seismic lateral earth pressure increment of 10 pcf. This increment should be applied in addition to the provided static lateral earth pressure using a “normal” triangular distribution with the resultant acting at H/3 in relation to the base of the retaining structure (where H is the retained height). For the restrained, at-rest condition, the seismic increment may be added to the applicable active lateral earth pressure (in lieu of the at- rest lateral earth pressure) when analyzing short duration seismic loading. Per Section 1803.5.12 of the 2019 CBC, the seismic lateral earth pressure is applicable to structures assigned to Seismic Design Category D through F for retaining wall structures supporting more than 6 feet of backfill height. This seismic lateral earth pressure is estimated using the procedure outlined by the Structural Engineers Association of California (Lew, et al, 2010).
Soil bearing and lateral resistance (friction coefficient and passive resistance) are provided in the “Foundation Design Parameters” Section. Eart hwork considerations (temporary backcuts, backfill, compaction, etc.) for re taining walls are provided in th e reference geotechnical report Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 386
Menifee Mayor and City Council
July 15, 2026
Page
1016 of 3153
Project No. 17172‐02 Page 11 May 17, 2022
(LGC Geotechnical 2018).
3.4 Preliminary Asphalt Concrete Pavement Sections
For the purposes of these preliminary recommendations, we used an estimated R-value of 40 and calculated pavement sections for Traffic Indices of 5.0 (or less) and 7.0. R-value testing of the drive aisle and parking subgrade will need to be performed to confirm our preliminary testing results/assumptions once the drive aisles and parking areas have been graded to finish subgrade elevations and the final Traffic Index is determin ed by the Civil Engineer. Determination of the Traffic Index is not the purview of the geotech nical consultant. The City of Menifee may have more stringent minimum pavement sections. Final street sections should be confirmed by the project civil engineer based upon the projected design Traffi c Index. If requested, LGC Geotechnical will provide sections for alternate TI values.
TABLE 4
Preliminary Asphalt Concrete Pavement Sections
Assumed Traffic Index 5.0 (or less) 7.0
R ‐Value Subgrade 40 40
AC Thickness 4.0 inches 4.0 inches
CAB Thickness 4.0 inches 7.0 inches
The thicknesses shown are minimum thicknesses. In creasing the thickness of any or all of the above layers will reduce the likelihood of the pavement experiencing distress during its service life. The above recommendations are based on the assumption that proper maintenance and irrigation of the areas adjacent to the roadway will occur through the design life of the pavement. Failure to maintain a proper ma intenance and/or irrigation program may jeopardize the integrity of the pavement.
Aggregate base material (crushed aggregate base and crushed miscellaneous base) should be compacted to a minimum of 95 percent relative compaction at or slightly above optimum moisture content per ASTM D1557. Subgrade be low aggregate base should be compacted to a minimum of 90 percent relative co mpaction, or the City of Menifee specifications, at or slightly above optimum moisture content per ASTM D1557. Earthwork recommendations are provided in the reference report (LGC Geotechnical, 2018).
3.5 Preliminary Portland Cement Concrete Pavement Sections
For the purposes of these preliminary recommendations, we used an estimated R-value of 40.
Preliminary minimum Portland Cement Concrete (PCC) pavement street sections are provided in Table 5 on the following page for Traffic Indices of 5.0 (or less), 6.0, and 7.0 and may be utilized in the design of the truck parking/circulation areas or loading docks. These recommendations must be confirmed with R-value testing of representative near-surface soils at the completion of grading and after underground utilities have been installed and backfilled. Final street sections Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 387
Menifee Mayor and City Council
July 15, 2026
Page
1017 of 3153
Project No. 17172‐02 Page 12 May 17, 2022
should be confirmed by the project civil engineer based upon the projected design Traffic Index.
If requested, LGC Geotechnical will provide s ections for alternate TI values. The appropriate paving section must be selected by the projec t civil engineer/client ba sed on design traffic indexes.
TABLE 5
Preliminary PCC Pavement Sections
Provided Traffic Index 5.0 (or less) 6.0 7.0
R ‐Value Subgrade 40 40 40
PCC Thickness 5.0 inches 6.0 inches 7.0 inches
95% Compacted Subgrade 12.0 inches 12.0 inches 12.0 inches
For preliminary planning purposes, the PCC p avement sections may consist of a minimum of concrete over subgrade soils compacted to 95 percent relative compaction (see Table 5 for section thicknesses). The concrete should have a minimum compressive strength of 3,000 psi and a minimum flexural strength of 475 psi at the time the pavement is subjected to traffic. Steel reinforcement is not required (ACI, 2017). The provided pavement sections assume that edge restraints like a curb and gutter will be provided. To reduce the potential (but not eliminate) for cracking, paving should provide control joints at regular inte rvals in each direction. The maximum joint spacing within all PCC pavements is recommended to be equal to or less than 30 times the pavement thickness; however, we recommend joint spacing not exceed 15 feet in each direction. Joints should be a de pth of 1/3 of the concrete thickness. Decreasing the spacing of these joints will further reduce, but not eliminate the potential for unsightly cracking.
If semi-trailers are to be disconnected from th e tractors from dolly jacks the design should consider concentrated loads imposed on the concrete pavement. These loads typically exceed the axle loads of the semi-trailer combinatio n and are applied to smaller contact areas, especially if applied near joint locations. If these irregular loadings are confined to specific areas of the site, the pavement section required thickness can be economized. These and other factors (e.g., traffic patterns, irregular loading, doweled vs un-doweled joints, etc.) outlined in ACI, 2017 should be addressed for the final design.
The thicknesses shown are minimum thicknesses. In creasing the thickness of any or all of the above layers will reduce the likelihood of the pavement experiencing distress during its service life. The above recommendations are based on the assumption that proper maintenance and irrigation of the areas adjacent to the roadway will occur through the design life of the pavement. Failure to maintain a proper ma intenance and/or irrigation program may jeopardize the integrity of the pavement.
Subgrade below the PCC pavement should be compacted to a minimum of 95 percent relative compaction per ASTM D1557 near optimum moisture content (generally within optimum and 2 percent above optimum moisture content). Earthwork recommendations are provided in the reference report (LGC Geotechnical, 2018).
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 388
Menifee Mayor and City Council
July 15, 2026
Page
1018 of 3153
Project No. 17172‐02 Page 13 May 17, 2022
3.6 Soil Corrosivity
Although not corrosion engineers (LGC Geotechnical is not a corrosion consultant), several governing agencies in Southern California require the geotechnical consultant to determine the corrosion potential of soils to buried concrete and metal facilities. However, grading within the subject site has yet to be completed and is likely to be/has been graded using multiple sources of imported materials. Therefore, testing should be performed at the completion of grading.
3.7 Nonstructural Concrete Flatwork
Nonstructural concrete (such as flatwork, sidewalks, etc.) has a potential for cracking due to changes in soil volume related to soil-moistu re fluctuations. To reduce the potential for excessive cracking and lifting, concrete should be designed in accordance with the minimum guidelines outlined below. These guidelines will reduce the potential for irregular cracking and promote cracking along construction joints but will not eliminate all cracking or lifting.
Thickening the concrete and/or adding addition al reinforcement will further reduce cosmetic distress.
Nonstructural and non-vehicular concrete flatwork placed on compacted non-expansive subgrade may be a minimum 4-inches in thickness with crack control joints spaced 8 feet apart for flatwork slabs and 6 feet apart for flatwork sidewalks. Crack control joints should be sawcut or deep open tool joint to a minimum of 1/3 the concrete thickness. The compacted subgrade below the nonstructural and non-vehicular conc rete flatwork should be wet down prior to placing concrete.
To reduce the potential for nonstructural concrete flatwork to separate from entryways and doorways, the owner may elect to install dowels to tie these two elements together.
3.8 Surface Drainage and Landscaping
3.8.1 Precise Grading
From a geotechnical perspective, we recommend that compacted finished grade soils adjacent to proposed structures be sloped away from the proposed building structures and towards an approved drainage device or unobstructed swale. Drainage swales, wherever feasible, should not be constructed within 5 feet of buildings. Where lot and building geometry necessitates that drainage swales be routed closer than 5 feet to structural foundations, we recommend the us e of area drains together with drainage swales. Drainage swales used in conjunction with area drains should be designed by the project civil engineer so that a properly constructed and maintained system will prevent ponding within 5 feet of the foundation. Code compliance of grades is not the purview of the geotechnical consultant.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 389
Menifee Mayor and City Council
July 15, 2026
Page
1019 of 3153
Project No. 17172‐02 Page 14 May 17, 2022
Planters with open bottoms adjacent to buildings should be avoided. Planters should not be designed adjacent to buildings unless prov isions for drainage, such as catch basins, liners, and/or area drains, are made. Overwatering must be avoided.
3.8.2 Landscaping
Planters adjacent to a building or struct ure should be avoided wherever possible or be properly designed (e.g., lined with a membrane), to reduce the penetration of water into the adjacent footing subgrades and thereby reduce moisture-related damage to the foundation. Planting areas at grade should be provided with appropriate positive drainage. Wherever possible, exposed soil areas should be above adjacent paved grades to facilitate drainage. Planters should not be depressed below adjacent paved grades unless provisions for drainage, such as multiple depressed area drains, are constructed.
Adequate drainage gradients, devices, and curbing should be provided to prevent runoff from adjacent pavement or walks into the pl anting areas. Irrigation methods should promote uniformity of moisture in planters and beneath adjacent concrete flatwork.
Overwatering and underwatering of landscape areas must be avoided. Irrigation levels should be kept to the absolute minimum level necessary to maintain healthy plant life.
Area drain inlets should be maintained an d kept clear of debris in order to properly function. Owners and property management personnel should also be made aware that excessive irrigation of neighboring properties can cause seepage and moisture conditions. Owners and property management personnel should be furnished with these recommendations communicating the importance of maintaining positive drainage away from structures, towards streets, when they design their improvements.
The impact of heavy irrigation or inadequate runoff gradients can create perched water conditions. This may result in seepage or shallow groundwater conditions where previously none existed. Maintaining ad equate surface drainage and controlled irrigation will significantly reduce the pote ntial for nuisance-type moisture problems.
To reduce differential earth movements such as heaving and shrinkage due to the change in moisture content of foundation soils, which may cause distress to a structure and associated improvements, moisture content of the soils surrounding the structure should be kept as relatively constant as possible.
3.9 Subsurface Water Infiltration
Recent regulatory changes have occurred that mandate that storm water be infiltrated below grade rather than collected in a conventional storm drain system. Typically, a combination of methods is implemented to reduce surface water runoff and increase infiltration including; permeable pavements/pavers for roadways and walkways, directing surface water runoff to grass-lined swales, retention areas, and/or drywells, etc.
It should be noted that collecting and concentrating surface water for the purpose of intentional infiltration below grade, conflicts with the geotechnical engineering objective of directing surface water away from slopes, structures and other improvements. The geotechnical stability and integrity of a site is reliant upon appropriatel y handling surface water. In general, the vast Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 390
Menifee Mayor and City Council
July 15, 2026
Page
1020 of 3153
Project No. 17172‐02 Page 15 May 17, 2022
majority of geotechnical distress issues are direct ly related to improper drainage. In general, distress in the form of movement of improvements could occur as a result of soil saturation and loss of soil support, expansion, internal soil erosion, collapse and/or settlement.
At completion, the proposed development will cons ist almost entirely of compacted fill soils, we do not recommend that surface water be intentionally infiltrated into subsurface soils.
3.10 Geotechnical Plan Review
Grading, foundation and any retaining wall plans, and final project drawings should be reviewed by this office prior to construction to verify that our geotechnical recommendations, provided herein, have been appropriately incorporat ed. Additional or modified geotechnical recommendations may be required based on the proposed layout.
3.11 Geotechnical Observation and Testing During Construction
The recommendations provided in this report are based on limited subsurface observations and geotechnical analysis. The interpolated subsurface conditions should be checked in the field during construction by a repr esentative of LGC Geotechnical. Geotechnical observation and testing are required per Section 1705 of the 2019 California Building Code (CBC).
Geotechnical observation and/or testing should be performed by LGC Geotechnical at the following stages:
During grading (removal bottoms, fill placement, etc.); During utility trench and any retaining wall backfill and compaction; Preparation of pavement subgrade and placement of aggregate base; After building/wall foundation excavation and prior to placing reinforcement and/or concrete; and
When any unusual soil conditions are encountered during any construction operation subsequent to issuance of this report.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 391
Menifee Mayor and City Council
July 15, 2026
Page
1021 of 3153
Project No. 17172‐02 Page 16 May 17, 2022
4.0 LIMITATIONS
Our services were performed using the degree of care and skill ordi narily exercised, under similar circumstances, by reputable engineers and geologists practicing in this or similar localities. No other warranty, expressed or implied, is made as to the conclusions and professional advice included in this report. The samples taken and submitted for laboratory testing, the observations made, and the in-situ field testing performed are believed representative of the entire project; however, soil and geologic conditions revealed by excavation may be different than our preliminary findings. If this occurs, the changed conditions must be evaluated by the pr oject soils engineer and geologist and design(s) adjusted as required or alternate design(s) recommended.
This report is issued with the understanding that it is the responsibility of the owner, or of his/her representative, to ensure that the information an d recommendations contained herein are brought to the attention of the architect and/or project engineer and incorporated into the plans, and the necessary steps are taken to see that the contract or and/or subcontractor properly implements the recommendations in the field. The contractor and/or subcontractor should notify the owner if they consider any of the recommendations presented herein to be unsafe.
The findings of this report are valid as of the present date. However, changes in the conditions of a property can and do occur with the passage of time, whether they be due to natural processes or the works of man on this or adjacent properties. Therefore, the findings, conclusions, and recommendations presented in this report can be relied upon only if LGC Geotechnical has the opportunity to observe the subsurface conditions du ring grading and construction of the project, in order to confirm that our preliminary findings are representative for the site.
In addition, changes in applicable or appropriat e standards may occur, whether they result from legislation or the broadening of knowledge. Accordingly, the findings of this report may be invalidated wholly or partially by changes outside our control. Therefore, this report is subject to review and modification, and should not be relied upon after a period of 3 years.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 392
Menifee Mayor and City Council
July 15, 2026
Page
1022 of 3153
© 2017 DigitalGlobe ©CNES (2017) Distribution Airbus DS © 2017 HERE © 2017 Microsoft Corporation Interstate 215Interstate 215
Approximate
Site Location
Approximate
Site Location
Trumble RoadTrumble RoadSR-74SR-74
FIGURE 1
Site Location Map
DATE
ENG. / GEOL.
PROJECT NO.
PROJECT NAME
SCALE
Not to Scale
May 2022
Lovett Industrial - Trumble Road
RLD/KBC
17172-02
LGC
Geotechnical, Inc.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 393
Menifee Mayor and City Council
July 15, 2026
Page
1023 of 3153
SM
SM
SM
Recommended Backsite
Location
LEGEND
Approximate Location of
Recommended Settlement MonumentsSM
FIGURE 2 -
Settlement Monument
Location Map
ENG. / GEOL.
PROJECT NO.
PROJECT NAME
SCALE
DATE
1" = 100'
May 2022
Lovett Industrial - Trumble Road
RLD/KBC
17172-02
LGC Geotechnical, Inc.
131 Calle Iglesia, Ste. 200
San Clemente, CA 92672
TEL (949) 369-6141 FAX (949) 369-6142
C
c(
0 a:
UJ
...I
cc
:iE
::::,
a:
I-
0 ------------...... J ---------
I ,, ,----- ........... ,,
I ........... ,
I (!) .., :-,......,. .,.
0 "' I
-+
--t
--r
BUILDING AREA
327,865 S.F.
-+
~ _J _l
►
en
0:
0 0 a_,_
~
0 0
0 ~~, - -- - -~I LIN[ 250' FROM : SOUTH
! "S~IT IVE RECEPTORS" PJ:+ ~
I I
_ -++ I , --------j---oo·
I I
! I
! L ______ _
: I IQ
I
____iCl'______,. I
I
I
I 89'-J"
r
' ,,,
,,_
70' { -
185'
-,_ -,_
- ~'-
---------j
-,''
+-
55'
=,..........,. - - __ __r-- - - - -- ---- -- ---- -- -- _ _J LGC
Geotechnical, Inc.
SCALE: 1"=100'
100' 0
~I ._I __
100'
I
200·
I
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 394
Menifee Mayor and City Council
July 15, 2026
Page
1024 of 3153
4 INCH DIAMETER, SCHEDULE 40 PERFORATED
PVC PIPE TO FLOW TO DRAINAGE DEVICE
PER PROJECT CIVIL ENGINEER
SAND BACKFILL
(EXPANSION INDEX £ 20,
MAXIMUM 35% FINES)
NATIVE BACKFILL COMPACTED
TO MINIMUM 90% RELATIVE
COMPACTION PER ASTM1557-D
MINIMUM 1 CUBIC FOOT PER LINEAR FOOT
BURRITO TYPE SUBDRAIN, CONSISTING OF
3/4 INCH CRUSHED ROCK WRAPPED IN
MIRAFI 140N OR APPROVED EQUIVALENT
FOOTING/WALL PER DESIGN ENGINEER
WATER PROOFING PER DESIGN ENGINEER
12" MINIMUM
18" MAXIMUM
BACKCUT PER OSHA
EXTENT OF FREE DRAINING SAND BACKFILL, MINIMUM
HEEL WIDTH OR H/2 WHICH EVER IS GREATER
WALL HEIGHT, H
NOTE:
PLACEMENT OF SUBDRAIN
AT BASE OF WALL WILL NOT
PREVENT SATURATION OF SOILS
BELOW AND / OR IN FRONT OF WALL
FIGURE 3
Retaining Wall
Backfill Detail
DATE
ENG. / GEOL
PROJECT NO.
PROJECT NAME
SCALE
Not to Scale
May 2022
Lovett Industrial - Trumble Road
RLD/KBC
17172-02
~ I Ill Ill Ill Ill 111-111- '•--:~
I - - - - - - - - .·:::-~
. .... ---.- ...... ·. .· : - . .-.- , ·:::.:./
~: ': · .. . :·: : : : . : •• ~ . _.:· . .
. ., .. . ..
LGC
Geotechnical, Inc .
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 395
Menifee Mayor and City Council
July 15, 2026
Page
1025 of 3153
Appendix A
References
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 396
Menifee Mayor and City Council
July 15, 2026
Page
1026 of 3153
Project No. 17172‐02 A‐1 May 17, 2022
APPENDIX A
References
American Concrete Institute, 2014, Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14).
________, 2017, Guide for the Design and Construction of Concrete Site Paving for Industrial and Trucking Facilities (ACI 3302R-17), May 2017.
American Society of Civil Engineers (ASCE), 2017, Minimum Design Loads for Buildings and Other Structures, ASCE/SEI 7-16, 2017.
________, 2018, Standard 7-16, Minimum Design Loads for Buildings and Associated Criteria for Buildings and Other Structures, Supplement 1, effective: December 12, 2018
ASTM International, Annual Book of ASTM Standards, Volume 04.08.
California Building Standards Commission, 2019, Ca lifornia Building Code, California Code of Regulations Title 24, Volumes 1 and 2, dated July 2019.
HPA Architecture, 2022, Conceptual Site Plan, Sche me 9, Trumble Road, Menifee, California, Job # 22113, dated April 21, 2022.
Lew, et al, 2010, Seismic Earth Pressures on Deep Basements, Structural Engineers Association of California (SEAOC) Convention Proceedings.
LGC Geotechnical, Inc., 2018, Preliminary Geotechn ical Evaluation for the Proposed Open Pit Restoration at 25630 Trumble Road, City of Menifee, County of Riverside, California, Project No. 17172-01, dated January 18, 2018.
________, 2022, Settlement Monitoring Recommendati ons, Proposed Open Pit Restoration at 25630 Trumble Road, City of Menifee, County of Riverside, California, Project No. 17172-02, dated May 5, 2022.
Riverside County, 2011, Low Impact Development BMP Design Handbook, Appendix A, Infiltration Testing, dated September 2011.
Structural Engineers Association of California (SEA OC), 2022, Seismic Design Maps, Retrieved May 13, 2022, from https://seismicmaps.org/
United States Geological Survey (USGS), 2008, Unified Hazard Tool, Dynamic: Conterminous U.S. 2014 (update) (v4.2.0), Retrieved May 13, 2022, from:
https://earthquake.usgs.gov/hazards/interactive/
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 397
Menifee Mayor and City Council
July 15, 2026
Page
1027 of 3153
Appendix E
Preliminary Water Quality Management Plan
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 398
Menifee Mayor and City Council
July 15, 2026
Page
1028 of 3153
Thienes Engineering, Inc.
CIVIL ENGINEERING LAND SURVEYING
PRELIMINARY HYDROLOGY
CALCUL
ATIONS
FOR
LOV
ETT 215
APNs: 329-240-046, -048 AND -051
PREPARED FOR
CROSLAND BARNES GROUP/UKIAH PARTNERS, LLC
6 CALENDAR COURT SUITE 3
COLUMB
IA, SC 29206
PHONE: (732) 580-9053
MARCH 15, 2024
REVISED MAY 1, 2024
REVISED SEPTEMBER 17, 2024
REVISED JULY 10, 2025
REVISED AUGUST 7, 2025
JOB NO. 4100
PREPAR
ED BY
THIENES ENGINEERING
14349 FIRESTONE BLVD.
LA MIRADA, CALIFORNIA 90639
P. (714) 521- 4811
FAX. (714) 521- 4173
•
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 399
Menifee Mayor and City Council
July 15, 2026
Page
1029 of 3153
PRELIMINARY HYDROLOGY
CALCU
LATIONS
FOR
LOVETT 215
APNs: 329-240-046, -048 AND -051
PREP
ARED UNDER THE SUPERVISION OF:
8/7/2025
REINHARD STENZEL DATE
R.C.E. 56155
EXP. 12/31/2026
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 400
Menifee Mayor and City Council
July 15, 2026
Page
1030 of 3153
Table of Contents
INTRODUCTION
A. PRO
JECT LOCATION 4
B. STUDY PURPOSE 4
C. PROJECT STAFF 4
VICINITY MAP 5
DISCUSSION
• PROJECT DESCRIPTION 6
• FEMA FLOOD ZONE 6
• PUBLIC STORM DRAIN 6
• EXISTING CONDITION HYDROLOGY 7
• PROPOSED CONDITION HYDROLOGY 7
• DETENTION 8
• METHODOLOGY 9
APPENDIX A REFERENCE MATERIALS 12
APPENDIX B HYDROLOGY CALCULATIONS 26
APPENDIX C DETENTION CALCULATIONS 40
APPENDIX D HYDROLOGY MAPS 127
APPENDIX E CONCEPTUAL STORM DRAIN PLANS 130
APPENDIX F CITY OF MENIFEE DETENTION MEMO 134
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 401
Menifee Mayor and City Council
July 15, 2026
Page
1031 of 3153
INTRODUCTION
A: PRO
JECT LOCATION
The project site is located on Trumble Road approximately 200 feet south of Watson Road and Sherman Road in Menifee, California. Please see the next page for a vicinity map.
B: STUDY PURPOSE
The purpose of this study is to determine the 100-year peak flow rate for the project site that will ultimately discharge to an existing box culvert running underneath the Interstate 215 Freeway.
C: PROJECT STAFF:
Thienes Engineering staff involved in this study include:
Reinhard Stenzel
Morgan Holve
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 402
Menifee Mayor and City Council
July 15, 2026
Page
1032 of 3153
Watson Rd
>
<,'l>.,e
~d
,ac Rd
n
"' "' "' "' a.
"O
0::
.,
"' "' u
"O
0::
.,
Vl
"' u
Lil ....
N
'
V
~
Lil ....
N
'
V
Ethan ac Rd
Watson Rd
"O
0::
.,
:0
E :,
~
f-
"O
0::
Illino is Ave .,
:0
E :,
~
f-
"O
0::
QI
:0
E :,
~
f-
Ethanac Rd
vs
~ 'Y.· ~ i',$
~ "'~ ~ '.J, >.
~ ~
lvatsol) ~' '?ct
Ethanac Rd
"' E
~ .,
.s::.
Vl
Vl
::T
"' ~
3 Q)
:,
"' a.
Vl
::T
"' ~
3 Q)
:,
"' a.
Baroni Rd
Watson Rd
q-
½"
"
'1:ro
,,,.0
I!!..., 1--,,
vs
~~'Y,<f",$ 'i-q <.} ~ ~ >~ l:,
~ "v<:'
~
, .
~
./aq
So ,, ...,
1--,,
q-
<:'l:, ~ 'v ,, Cf.
v,.,,
I) -1
1--,,
q-
,._l:> r,;
'Y. a,.,.1.
So ,, -1
1--,,
Ethanac Rd
.;
C :,
~
Ill
Baron i Rd
N
Watson Rd <~J
+
q-
Ii 0 ,}>
'v )
© ;§>tc,
{i
C!l
e
"/<l ' all/ ,,,,,
s-1 1--,,
q-
._l:> r,;
'1:ro
,,,.0
I!! -1 1--,,
vs
~ 'Y.· ~ i>,5
<:::ii "'~ ~ '.J, >
~ ~
~~ .
/a% ~
~~ vs So
~ 'Y;. ,, -1
1--,, ~ ;§>,5"'
~ ~
~It
q-
.s-I>'
Ethanac Rd
I so m I
300 ft
® 2022 MAPOUEST, © TOMTOM, © 2022 MAPBOX I LEGAL I PRIVACY I ABOUT OUR ADS I DO NOT SELL Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 403
Menifee Mayor and City Council
July 15, 2026
Page
1033 of 3153
DISCUSSION
Project Description
The project site encompasses approximately 17.20 acres. Proposed improvements include one warehouse-style building of approximately 328,208 square feet. There is a truck yard east of the building with trailer parking and vehicle parking to the west and south of the building. There will be landscaping along the northerly property line and located throughout the site.
FEMA Flood Zone
The project site is located in FEMA Flood Zone X, “area of minimal flood hazard”, per FEMA FIRM Map 06065C1445H effective August 8, 2014.
See Appendix “A” for referenced materials.
Public Storm Drain
The project site is tabeled to an existing 6’x5’ Caltrans concrete box culvert (RCB) that runs underneath the Interstate 215 Freeway. There is an existing public storm drain, Line “A”, that runs southerly parallel to Trumble Road and continues westerly in Illinois Avenue. This storm drain system, designed by Albert A. Webb Associates (City File No.
P8-921), discharges into the existing RCB. It appears the site is not tabled to discharge into the existing Line “A”. The existing pipe is also full, therefore, any additional flow added to the pipe will cause negative downstream hydraulic impacts.
However, it is assumed that the site is tabled to drain to the existing Caltrans drain, and furthermore, that the drain is designed to handle flows from the site and surrounding parcels. The westerly adjacent site has connected directly to the box via a proposed storm drain and parcels adjacent to Trumble Road enter the box via street flow in the existing condition. Therefore, it is assumed that there are no downstream hydraulic impacts to the existing RCB with the inclusion of the project site.
The project site will instead drain to the existing box culvert via a proposed 30” RCP public storm drain system. The onsite storm drain system will “bubble out” into the public storm drain system. Once sufficient head is lost, a proposed pump will dry the pipe. The storm drain will convey flows southerly in Trumble Road then westerly through Illinois Avenue, running parallel to the existing Line “A”. A proposed headwall will allow for both Line “A” and the proposed RCP to connect to the RCB.
See Appendix “A” for pertinent reference materials.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 404
Menifee Mayor and City Council
July 15, 2026
Page
1034 of 3153
Existing Condition
The site is currently a roughly graded, undeveloped open pit. Most of the site (Nodes 100-111 on the existing condition hydrology map) sheet flow easterly into the open pit and is detained onsite. The 100-year peak flow rate to this area is approximately 24.3 cfs.
A portion of the site along Trumble Road and the southerly property line (Nodes 120- 122) sheet flows southerly through the site and sits in a low spot along the southerly property line. A temporary solid fence prevents runoff from entering the residential houses to the south of the site. The 100-year peak flow rate from this area is approximately 1.0 cfs.
The total 100-year peak flow rate from the project site is approximately 25.8 cfs.
A portion of the northerly adjacent site (Nodes 200-201) sheet flow westerly onto the project site. These flows comingle with onsite runoff and are similarly detained onsite.
The 100-year peak flow rate from this area is approximately 2.1 cfs.
See Appendix “B” for existing condition hydrology calculations and Appendix “D” for existing condition hydrology map.
Proposed Condition
As previously mentioned, the site will discharge to the existing Caltrans RCB via a proposed public storm drain.
The easterly portion of the proposed building and easterly truckyard area (Nodes 100-115 on the proposed condition hydrology map) drain to catch basins located in the easterly truck yard. A proposed onsite storm drain system will convey flows southerly then westerly around the proposed building. The southerly drive aisle (Nodes 116-117) will be confluenced in the system as it continues westerly. The westerly portion of the proposed building, northerly drive aisle and northerly landscaped area (Nodes 200-213) drain to catch basins located in the westerly vehicle parking area. Flows will confluence with runoff from the east and ultimately discharge into the proposed public storm drain system. The 100-year peak flow rate from the project site is approximately 45.7 cfs.
The northerly offsite run-on will be captured in a v-gutter along the northerly property line and conveyed southerly through the site. Flows will ultimately discharge into the onsite storm drain past the water quality “bleed off” point.
The total 100-year peak flow rate to the proposed public storm drain system (including offsite runoff) is approximately 47.8 cfs.
See Appendix “B” for proposed condition hydrology calculations and Appendix “D” for proposed condition hydrology map.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 405
Menifee Mayor and City Council
July 15, 2026
Page
1035 of 3153
Detention
For final design, Riverside County typically requires detention analysis for the 1-hour, 3- hour, 6-hour and 24-hour duration events for the 2-year, 5-year and 10-year return frequencies. Detention basin and outlet sizing will ensure that none of these storm events has a higher peak discharge in the post-development condition than in the pre- development condition. Therefore, there will be no negative impact on existing downstream drainage facilities.
Hydrographs for the above-described events were established for both existing (pre- developed) and proposed (commercial) development conditions. Hydrograph parameters are as follows:
• For the 2-year and 5-year events, the loss rate will be determined using an AMC I condi
tion. For the 10-year event, AMC II was used.
• Undeveloped condition Low Loss=90%
• Basin site Low Loss=10%
• Rainfall values from the Riverside County Hydrology Manual
For p
reliminary design purposes, sizing may be based on the largest difference in runoff hydrograph volume between the “developed” condition and the “pre-developed” conditions.
Hydrographs were established using the area tributary to each underground system (site only, no offsite area) for the existing and proposed condition for the 1-hour, 3-hour, 6- hour and 24-hour events for the 10-year storm frequencies. The following table summarizes the volumes for the specified storm events:
Table 1: Easterly Truck Yard
Storm Duration Existing Condition
Volume (ac-ft)
Proposed
Condition Volume
(ac-ft)
Difference (ac-ft)
10 Year 1-Hour 0.4667 0.4947 0.028
10 Year 3-Hour 0.6568 0.7738 0.1171
10 Year 6-Hour 0.7548 1.0258 0.271
10 Year 24-Hour 0.8417 1.6281 0.7864
From the above table, the largest difference in volume occurs during the 10-year, 24-hour storm event and is approximately 0.7864 acre-feet. This volume can be stored at the surface of the truck year at a depth of approximately 0.74’.
Truck yard detention does not pose flooding risks to the proposed building or onsite operations. The proposed building has a finished floor of approximately 1429.26, while the detention water surface elevation is at approximately 1425.22. This leaves approximately 4.04’ of freeboard with the proposed building. Furthermore, there are no Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 406
Menifee Mayor and City Council
July 15, 2026
Page
1036 of 3153
pedestrian pathways within the detention area, allowing site operations to continue while detained water is present on the surface.
Table 2: Westerly Parking Lot
Storm Duration Existing Condition
Volume (ac-ft)
Proposed
Condition Volume
(ac-ft)
Difference (ac-ft)
10 Year 1-Hour 0.4901 0.5194 0.0293
10 Year 3-Hour 0.6897 0.8125 0.1228
10 Year 6-Hour 0.7926 1.0771 0.2845
10 Year 24-Hour 0.8838 1.7096 0.8258
From the above table, the largest difference in volume occurs during the 10-year, 24-hour storm event and is approximately 0.8258 acre-feet. This volume will be solely stored in the underground chamber systems located in the westerly truck yard.
The following table summarizes pre- and post-development peak flow rates for the specified events:
Table 3: Easterly Truck Yard
Storm Duration Existing Condition
Discharge (cfs)
Proposed
Condition
Discharge (cfs)
Difference (cfs)
10 Year 1-Hour 12.9 17.7 4.8
10 Year 3-Hour 8.3 9.2 0.9
10 Year 6-Hour 7.3 8.2 0.9
10 Year 24-Hour 2.3 2.7 0.4
Table 4: Westerly Truck Yard
Storm Duration Existing Condition
Discharge (cfs)
Proposed
Condition
Discharge (cfs)
Difference (cfs)
10 Year 1-Hour 14.0 17.7 3.7
10 Year 3-Hour 8.4 9.6 1.2
10 Year 6-Hour 7.4 8.5 1.1
10 Year 24-Hour 2.4 2.8 0.4
As previously stated, truck yard detention will be utilized such that the post-development peak flow rate does not exceed the pre-development peak flow rate. Therefore, there will be no negative impacts to existing downstream facilities, nor any adverse flooding affects in adjacent streets.
See Appendix “C” for existing and proposed condition hydrographs.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 407
Menifee Mayor and City Council
July 15, 2026
Page
1037 of 3153
Water Quality
Water quality requirements will be met with a system of low flow lines that convey required flows to proposed underground detention systems located in the easterly truck yard and westerly parking area. From here, low flows will be routed through a proposed modular wetland system before confluencing back into the proposed onsite storm drain system via a proposed sump pump.
The underground detention systems are also sized for peak flow detention and hydrologic conditions of concern (HCOC) mitigation. Separate pumps are also proposed to allow the appropriate discharge of HCOC and peak flows.
Methodology
Hydrology calculations were computed using the Riverside County Rational Method program (by AES Software). The soil type is “D” per the Riverside County Hydrology Manual. Hydrograph calculations were run in the CivilD hydrograph program. See Appendix “A” for pertinent reference materials.
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 408
Menifee Mayor and City Council
July 15, 2026
Page
1038 of 3153
APPENDIX DESCRIPTION
A
REFERENCE MATERIAL
B HYDROLOGY CALCULATIONS
C DETENTION ANALYSIS
D HYDROLOGY MAPS
E CONCEPTUAL STORM DRAIN PLANS
F CITY OF MENIFEE DETENTION MEMO
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 409
Menifee Mayor and City Council
July 15, 2026
Page
1039 of 3153
APPENDIX A
REFERENCE MATERIALS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 410
Menifee Mayor and City Council
July 15, 2026
Page
1040 of 3153
AND
WATER CONSERVATION DISTRICT
., 2-YEAR-1-HOUR
PRECIPITATION
PLATE D-4,3
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 411
Menifee Mayor and City Council
July 15, 2026
Page
1041 of 3153
~
AND
WATER CONSERVATION DISTRICT
2-YEAR -3-HOUR
PRECIPITATION
SHl:llT No
f A r4" i,1:11ri1-ag.,., ~i. L W ■ 11r .. " , _ N O
c;i •,.'l&
c,,rn::llu:i a l'
Ot,n g,!'lfl¥11'/fl
PLATE E-5.1
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 412
Menifee Mayor and City Council
July 15, 2026
Page
1042 of 3153
.
AND
WATER CONSERVATION DISTRICT
2-YEAR- 6-HOUR
PRECIPITATION
f Aff,IIC)V'f-.0 1 ,- I N<oll'ICIA
• o,.rr o-... w,,
S Hll: llT No
PLATE E-5.3
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 413
Menifee Mayor and City Council
July 15, 2026
Page
1043 of 3153
AND
WATER CONSERVATION DISTRICT
2-YEAR 24-HOUR
PRECIPITATION
f t,1 f .CT Ho
,_
PLATE E-5,5
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 414
Menifee Mayor and City Council
July 15, 2026
Page
1044 of 3153
AND
WATER CONSERVATION DISTRICT
100-YEAR- I-HOUR
PRECIPITATION
,,
I I
0 1r'l()C
(;OU
~
V'
r :f I _,
1. ' -
·r~~
w.
I
PLATE D-4.4
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 415
Menifee Mayor and City Council
July 15, 2026
Page
1045 of 3153
AND
WATER CONSERVATION DISTRICT
100 -YEAR - 3-HOUR
PRECIPITATION
c,1 1.cqo . ...
D,._r,. 0,,, ,.,1,,_;,c
!hr Cl'T No
PLATE E-5.2
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 416
Menifee Mayor and City Council
July 15, 2026
Page
1046 of 3153
AND
WATER CONSERVATION DISTRICT
100-YEAR- 6-HOUR
PRECIPITATION
(:,1 CC d P D Y
0 .a.T f - ~1, w ,r,
PLATE E-5.4
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 417
Menifee Mayor and City Council
July 15, 2026
Page
1047 of 3153
~- ·-- __ ..:, -, i:1 ..... • ,, .. =,_,-,_, ,._,. ___...v.· ' -'
'
Al'l'II O VC- C>
\ .; -~
L - --L
R8E
- -- -·- -· - -l.,-1,-
:.-
AND
WATER CONSERVATION DISTRICT
100-YEAR-24-HOUR
PRECIPITATION
G "'lll' 1:H~ l N(III fl Q ,1.C.• I.D ■ ~
OATl o,u,wN
PLATE E-5.6
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 418
Menifee Mayor and City Council
July 15, 2026
Page
1048 of 3153
) LEGEND
-- SOILS GROUP BOUNDARY
A SOILS GROUP DESIGNATION
RCFC a WCD
H YDROLOGY JYlANUAL - -- - -0 FEET 5000
HYDROLOGIC SOILS GROUP MAP
FOR
ROMOLAND
PLATE C-1.42
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 419
Menifee Mayor and City Council
July 15, 2026
Page
1049 of 3153
National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250
Feet
Ü
S E E F I S R E P O R T F O R D E T A I L E D L E G E N D A N D I N D E X M A P F O R F I R M P A N E L L A Y O U T
S P E C I A L F L O O D
H A Z A R D A R E A S
W i t h o u t B a s e F l o o d E l e v a t i o n ( B F E ) Z o n e A , V , A 9 9
W i t h B F E o r D e p t hZ o n e A E , A O , A H , V E , A R R e g u l a t o r y F l o o d w a y
0 . 2 % A n n u a l C h a n c e F l o o d H a z a r d , A r e a s o f 1 % a n n u a l c h a n c e f l o o d w i t h a v e r a g e d e p t h l e s s t h a n o n e f o o t o r w i t h d r a i n a g e a r e a s o f l e s s t h a n o n e s q u a r e m i l eZ o n e X F u t u r e C o n d i t i o n s 1 % A n n u a l
C h a n c e F l o o d H a z a r dZ o n e X
A r e a w i t h R e d u c e d F l o o d R i s k d u e t o L e v e e . S e e N o t e s .Z o n e X
A r e a w i t h F l o o d R i s k d u e t o L e v e eZ o n e D N O S C R E E NA r e a o f M i n i m a l F l o o d H a z a r dZ o n e X A r e a o f U n d e t e r m i n e d F l o o d H a z a r dZ o n e D C h a n n e l , C u l v e r t , o r S t o r m S e w e r L e v e e , D i k e , o r F l o o d w a l l
C r o s s S e c t i o n s w i t h 1 % A n n u a l C h a n c e 1 7 . 5W a t e r S u r f a c e E l e v a t i o n
C o a s t a l T r a n s e c t
C o a s t a l T r a n s e c t B a s e l i n e
P r o f i l e B a s e l i n e
H y d r o g r a p h i c F e a t u r e
B a s e F l o o d E l e v a t i o n L i n e ( B F E ) E f f e c t i v e L O M R s
L i m i t o f S t u d y
J u r i s d i c t i o n B o u n d a r y
D i g i t a l D a t a A v a i l a b l e
N o D i g i t a l D a t a A v a i l a b l e
U n m a p p e d
T h i s m a p c o m p l i e s w i t h F E M A 's s t a n d a r d s f o r t h e u s e o f d i g i t a l f l o o d m a p s i f i t i s n o t v o i d a s d e s c r i b e d b e l o w .
T h e b a s e m a p s h o w n c o m p l i e s w i t h F E M A 's b a s e m a p a c c u r a c y s t a n d a r d s
T h e f l o o d h a z a r d i n f o r m a t i o n i s d e r i v e d d i r e c t l y f r o m t h e a u t h o r i t a t i v e N F H L w e b s e r v i c e s p r o v i d e d b y F E M A . T h i s m a p w a s e x p o r t e d o n 4 / 5 / 2 0 2 2 a t 3 : 3 2 P M a n d d o e s n o t r e f l e c t c h a n g e s o r a m e n d m e n t s s u b s e q u e n t t o t h i s d a t e a n d t i m e . T h e N F H L a n d e f f e c t i v e i n f o r m a t i o n m a y c h a n g e o r b e c o m e s u p e r s e d e d b y n e w d a t a o v e r t i m e .
T h i s m a p i m a g e i s v o i d i f t h e o n e o r m o r e o f t h e f o l l o w i n g m a p e l e m e n t s d o n o t a p p e a r : b a s e m a p i m a g e r y , f l o o d z o n e l a b e l s , l e g e n d , s c a l e b a r , m a p c r e a t i o n d a t e , c o m m u n i t y i d e n t i f i e r s , F I R M p a n e l n u m b e r , a n d F I R M e f f e c t i v e d a t e . M a p i m a g e s f o r u n m a p p e d a n d u n m o d e r n i z e d a r e a s c a n n o t b e u s e d f o r r e g u l a t o r y p u r p o s e s .
Legend
O T H E R A R E A S O F
F L O O D H A Z A R D
O T H E R A R E A S
G E N E R A L
S T R U C T U R E S
O T H E R
F E A T U R E S
M A P P A N E L S
8 B 2 0 . 2
T h e p i n d i s p l a y e d o n t h e m a p i s a n a p p r o x i m a t e p o i n t s e l e c t e d b y t h e u s e r a n d d o e s n o t r e p r e s e n t a n a u t h o r i t a t i v e p r o p e r t y l o c a t i o n . 1:6,000
1 1 7 ° 1 1 '1 9 " W 3 3 ° 4 5 '9 " N
1 1 7 ° 1 0 '4 1 " W 3 3 ° 4 4 '3 9 " N
B a s e m a p : U S G S N a t i o n a l M a p : O r t h o i m a g e r y : D a t a r e f r e s h e d O c t o b e r , 2 0 2 0 FEMA
c:::::::::J
IIIIIII
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 420
Menifee Mayor and City Council
July 15, 2026
Page
1050 of 3153
STORM DRAIN IMPROVEMENT PLANS FOR:
CLASSIC PACIFIC BUSINESS PARK (PM 34082)
IN THE CITY OF PERRIS,
STORM DRAIN GENERAL NOTES
1. THE CONTRACTOR SHAU.. CONSTRUCT THE FLOOD CONTROL IMPROVEMENTS SHOWN ON THE DRAWINGS IN CONFORMANCE WITH THE
REQUIREMENTS OF THE RIVERSIDE COUNTY FLOOD CONTROL AND WATER CONSERVATION DISTRICT'S MEMORANDUM OF UNDERSTANDING STANDARD SPECIFICATIONS DATED SEPTEMBER 1984 AND DESIGN MANUAL STANDARD DRAWINGS DATED MAY 1971.
2. ALL STATIONING REFERS TO THE CENTERLINE OF CONSTRUCTION UNLESS OTHERWISE NOTED.
3. STATIONING FOR LATERALS AND CONNECTOR PIPES REFER TO THE CENTERLINE- CENTERLINE INTERSECTION STATION, UNLESS OTHERWISE NOTED.
4. FORTY-EIGHT HOURS BEFORE EXCAVATION, CALL UNDERGROUND SERVICE ALERT 1-800-227-2600.
5. ALL ELEVATIONS SHOWN ARE IN FEET AND DECIMALS THEREOF BASED ON U.S.C. & G.S. DATUM.
6. ALL CROSS SECTIONS ARE TAKEN LOOKING DOWNSTREAM.
7. ELEVATIONS OF UTILITIES ARE APPROXIMATE UNLESS OTHERWISE NOTED.
8. OPENlNGS RESULTING FROM THE cumNG OR PARTIAL REMOVAL OF EXISTING CULVERTS, PIPES, OR SIMILAR STRUCTURES TO BE ABANDONED SHALL BE SEALED WITH a• OF CLASS 'B" CONCRETE.
9. "V" IS THE DEPTH OF INLET OF CATCH BASlNS MEASURED FROM THE TOP OF CURB TO 1HE INVERT OF 1HE CONNECTOR PIPE.
10. ALL CURBS, GUTTERS, SIDEWALKS, DRIVEWAYS ANO 01HER EXISTING IMPROVEMENTS TO BE RECONSTRUCTED IN KIND ANO AT 1HE SAME ELEVATION AND LOCATION AS 1HE EXISTING IMPROVEMENTS UNLESS 01HERWISE NOTED.
11. ROAD CLOSURES SHALL BE PERMITTED FOR A SHORT PERIOD ONLY. THE CONTRACTOR IS TO SUBMIT A DETOUR PLAN TO THE CITY ENGINEER FOR APPROVAL AND PLACE SIGNS PER APPROVED PLANS PRIOR TO BEGINNING CONSTRUCTION.
12. VIDEO OF STORM DRAIN FACILITIES SHOWN ON THESE PLANS MUST BE SUBMITTED TO CITY ENGINEER FOR REVIEW.
13. TRAFFlC CONTROL PLAN SHALL BE SUBMITTED TO THE CITY ENGINEER FOR REVIEW AND APPROVAL,
14. ALL MANHOLE COVERS FOR STORM DRAIN LOCATED OUTSIDE OF DEDICATED RIGHT-OF-WAY SHALL BE LOCKED PRESSURE TYPE, AND SHALL READ 'CITY OF PERRIS S.D.'
15. VIDEO OF ALL ON-SITE AND OFF-SITE STORM DRAIN SHALL BE SUBMITTED TO CITY ENGINEER FOR REVIEW AND APPROVAL.
NOTICE TO CONTRACTOR:
"!HE EXISTENCE AND LOCATIONS OF ALL UNDERGROUND UTILITIES (UTILITY PIPES, STRUCTURES, ETC.) SHOWN ON THESE PLANS (MAIN LINES
ONLY - NO SERVICE LATERALS) WERE ASCERTAINED BY A REVIEW OF RECORDS PROVIDED BY THESE MEMBER AGENCIES AND ARE APPROXIMATE. NEITHER THE OWNER NOR "!HE ENGINEER ASSUMES ANY RESPONSIBILITY FOR UTILITIES NOT SHOWN OR NOT IN THE LOCATION SHOWN.
THE CONTRACTOR IS REQUIRED TO TAKE DUE PRECAUTIONARY MEASURES TO PROTECT THE UTILITY LINES SHOWN AND ANY OTHER LINES NOT OF RECORD OR NOT SHOWN ON 1HESE PLANS. LOCATIONS OF UTILITIES SHALL BE VERIFIED BY 1HE CONTRACTOR PRIOR TO COMMENCEMENT OF CONSTRUCTION.
BASIS OF BEARINGS
BASIS OF BEARING IS THE CENTERLINE OF PERRIS BOULEVARD TAKEN PS NOD' 16'30"E, AS SHOWN BY AMENDED PARCEL MAP 16950 PER P.M. 113/62- 70, RECORDS OF RIVERSIDE COUNTY, CALIFORNIA.
NOTE
ALL ON-SITE STORM DRAIN AND PRIVATE LATERALS REFERRED TO ON THESE PLANS ARE TO BE CONSTRUCTED PER SEPARAlE ON-SITE DRAINAGE PLANS AND CONCURRENTLY Wl"IH PUBLIC STORM DRAIN SHOWN HEREON.
CONSTRUCTION NOTES QUANTITIES
0 G)
@
0 @
©
(j)
@
INSTALL 48" RCP, D-LOAD PER PLAN
INSTALL 36' RCP, D-LOAD PER PLAN
INTENTIONALLY LEFT BLANK
INSTALL 24" RCP, D-LOAD PER PLAN
INSTALL 18" RCP, D-LOAD PER PLAN
CONSTRUCT CURB OPENING CATCH BASIN PER APWA STD. PLAN 300-2 (H=4• - W NOTED ON PLANS)
661 LF
638 LF
437 Lf
180 Lf
5 EA
S'LY R/W
1 I
11.0'
It)
N
w
I
<
I
V)
a::
w
1-
z
33.0'
C/L
22.0'
' I 9.0' I 6.0' , I
r PROP. IMPROVEMENTS (TYP.),
I '
'---- -------- -- -- .... - 1· .
150 75
33.0'
22.0·
6.0'
• I r PROP. AC PVM'T
- ·- - ,.
I
PROP. a• WTR_)-
~
't, I
. rPROP. a• SWR .-H
u "' ,,;
I • PROP. 48 /36
PUBLIC SD
• -H
0 UNDERGROUND UTILITIES TYPICAL SECTION
IWNOIS AVENUE
NOT TO SCALE
INDEX MAP
SCALE: 1" = 150'
GRAPHIC SCALE
I
0 150
N'LY R/W
11.0'
'
I
0 @
CONSTRUCT LOCAL DEPRESSION PER AWA STD. PLAN 313-1 CASE B CONSTRUCT MANHOLE NO. 2 PER RCFCD STD. DWG. NO. MH252
CONSTRUCT MANHOLE NO. 4 PER RCFCD STD. DWG. NO. MH254
INTENTIONALLY LEFT BLANK
5 EA
4 EA
1 EA E'LY R/W
20.0'
C/L
39.0'
W'LY R/W ESM'T
10.0'
®
@
CONSTRUCT MANHOLE NO. 1 PER RCFCD STD. DWG. NO. MH251
CONSTRUCT JUNCTION STRUCTURE NO. 2 PER RCFCD SID. DWG. NO. JS227 CONSTRUCT TRANSITION STRUCTURE NO. 3 PER RCFCD STD. DWG. NO. TS303 CONSTRUCT JUNCTION STRUCTURE NO. 4 PER RCFCD STD. DWG. NO. JS229 EA
4 EA
2 EA
2 EA
@
@
r-A. __ :S_B.---=--v /2-:-:-:~:----T-~~
T/fcSe ,"l 'S ,e,;,-zs::;r ANY S-~BSTANT/AL
!ES/$/f/ lt'#Vi T/tJAl'S' AS ,P,f!m//L>:P 70
l!:88 A5'~ci.fr.f.c_; BY m'i!" CfM/7i'!ACTO I<
C
0 e BENCHMARK
RIVERSIDE COUNJY B.M. M-26-2, BRASS DISC ON BRIDGE
';; ELEV : 1423.462, DATIJM NGVD29.
• AT THE SOUTHWEST CORNER Of THE BRIDGE SO 14-P OVER THE SAN JACINTO " RIVER fiI NUEVO ROAD; 14.0 FEET SOUTH Of NUEVO ROAD; A BRASS DISK SET ~ IN THE TOP Of A CONCRETE BRIDGE ABUTMENT AND MARKED IA-26-2 1963. ... ?1----------------------1 .;- THE PRIVATE ENGINEER SIGNING THESE PLANS IS RESPONSIBI.E FOR ~ ~
s.o· 15.0'
9.0' 6.0'
PROP. AC PVM'T
EX. 4" WTR
EX. 12" WTR_} •
28.0'
14.0'
PROP. IMPROVEMENTS (TYP.)
EX. 18" SWR
11.0'
PROP. 36" /24'
PUBLIC SD
UNDERGROUND UTILITIES TYPICAL SECTION
TRUMBLE ROAD
NOT TO SCALE
AS Bl//t.T
0 ASSURING THE ACCURACY AND ACCEPTABILITY OF THE DESIGN HEREON.
DIAL
BEFORE
YOU DIG
TWO WORKING
DAYS BEFORE
YOU DIG
DATE BY MARK APPR. DATE .,. IN 11iE EIIEN1° OF DISCREPANCIES ARISING AFTER CITY APPROVAL OR ~ DURING CONSTRUCllON, THE PRIVATE ENGINEER SHALL BE RESPONSIBLE FOR DETERMINING AN ACCEPTABLE SOLUTION AND RE\/JSING THE Pt.ANS 0 FOR APPROV>L BY THE CITY.
ENGINEER
TOLL FREE A PUBLIC SEVICE BY 1-800-227-2600
UNDERGROUND SERVICE ALERT DESIGNED BY:
REVISIONS CITY
RB DRAWN BY: BTE CHECKED BY: RB
PROP. SD
EASEMENT
' 5.0' 5.0'
1 300
CALIFORNIA
I-
1 "~ 150
450
LIST OF ABBREVIATIONS
AB
AC
APWA
BC
BCR
BTM
BVC
CB
C/L
C&G
EC
ECC.
ECR
ESMT
EVC
FH
FL
FS
HOPE
HP
INV
JS
LAT.
LF
LP
MC
MH
MVC
NTS
PCC
PRC
RCP
RED.
R/W
SCE
SEP.
S/W
TC
TS
XING
AGGREGATE BASE
ASPHALT CONCRETE
AMERICAN PUBLIC WORKS ASSOCIATION
BEGINNING OF CURVE
BEGINNING OF CURVE RETURN
BOTTOM
BEGINNING Of VERTICAL CURVE
CATCH BASIN
CENTERLINE
CURB & GUTTER
END OF CURVE
ECCENTRIC
END OF CURVE RETURN
EASEMENT
END OF VERTICAL CURVE
FIRE HYDRANT
FLOWUNE
FINISH SURFACE
HIGH DENSITY POLYETHYLENE PIPE
HIGH POINT
INVERT ELEVATION
JUNCTION STRUCTURE
LAlERAL
LINEAR FEET
LOW POINT
MEDIAN CURB
MANHOLE
MIDDLE OF VERTICAL CURVE
NOT TO SCALE
PORTLAND CEMENT CONCRETE
POINT OF REVERSE CURVE
REINFORCED CONCRETE PIPE
REDUCER
RIGHT OF WAY
SOUTHERN CALIFORNIA EDISON
SEPARATE
SIDEWALK
TOP OF CURB
TRANSITION STRUCTURE
CROSSING
APPROVED BY:
R.C.E. NO. EXP. DATE
CALTRANS R/W
ENCROACHMENT PERMIT REQ'D
EXIST. 6'x5' DBL RCB **
0:: < L,J ~
a. "" to 0
<.> z
0:: ::'i
al a..
0 .
"' 5; X
rJ ~
a: ~ ~<'.5 a.
' i ! I
I
I
;f;
r
I
I
i
I
I I
I
I
I
I ~,
<f:
13.00'
9.25' i----~=---=-i---t-1.17'
SECTION "A-A"
-1
/ / I
/ t
f I
'
i
'
12.33'
I
a.so•
0.50'
: 0.67'
0.50'
0.50'
X
W.Q. BASIN BTM. ~ ;"
/ ELEV.=1416.0 -" "'
1c g; !:;
j_; "' ~ a.. -
I
I
2.50' 2.50'
0.50'
0.50'
2.50' 2.50'
I
I
19.00'
WEIR/FOREBAY STRUCTURE DETAIL
SCALE: 1 • = 5'
CONC. SIDEWALK
BACK OF SIDEWALK
CATCH BASI
CATCH BASIN STENCILING
GUTTER UP
CATCH BASIN STENCILING DETAIL
NOT TO SCALE
A. STENCILS TO HAVE 2" LETTERS AS FOLLOW:
NO DUMPING
DRAINS TO RIVER
B. PLACE BOTH STENCILS CENTERED WITHIN THE CATCHBASIN
OPENING AND Wl1HIN THE TOP OF CURB.
C. SPRAY BOTH STENCILS WITH WHITE PAINT.
D. REMOVE STENCILS WHEN PAINT IS DRY.
I
i
I
l I
ii l
I
I
/
I
'
i
,/
"
ii
WATSON
ROAD
A
ROAD
3-31-08
INDEX OF SHEETS
TITLE SHEET SHEET 1
SHEET 2
SHEET 3
STA 10+00 TO 19+00 - PLAN & PROFILE
ST A 19+00 TO 28+06 - PLAN & PROFILE
ALBERT A.
WEBB
ASSOCIATES
ls'NGINEERING CONSULTANTS
SCALE: AS SHOWN
DATE: Feb 2007
CIVIL ENGINEERS
3788 McCRAY STREET
RIVERSIDE, CA. 92506
PH: (951) 686-1070
FAX: (951) 788-1256
SITE
VICINITY MAP 0
T.SS., R3W., SECTION 18
N.T.S.
CITY Of' PERRIS
STORM DRAIN PLANS
<USSIC PACIFIC BUSINESS PABK (PM /J4082)
TITLE SHEET
INDEX MAP
FOR: CLASSIC PACIFIC w.o. 04-0425
SHEET
1 OF~SHEETS
CITY FlLE NO:
P8-921
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 421
Menifee Mayor and City Council
July 15, 2026
Page
1051 of 3153
··+·4-4r28 -.i••···i· ••.. 1· ; •
i'ROi'OSED
fOREBAY/WSIR $J.R~CTUR
' ~cf: !)ffAltt Ot; Sr!T; 1·
.. / ..
10 !
~ .
J ..
.J
!
JS STA 10+21.99
ANGLE A 90'00'00"
B 24•
C 3.50'
D 48"
E 1.44'
F 1.84'
G 1.59'
L 2.88'
ELEV. R 1417.39
ELEV. S 1417.27
12 CURVE DATA TABLE
IC1
IC2
IC3
) q,~,,:§2,5.cfs
V1()0= $.0 fps :
- . 1 .
1 1
JS STA 12+09.59
ANGLE A 90'00'00"
B 24"
C 3.50'
D 48"
E 1.44'
F 1.84'
G 1.59'
L 2.88'
ELEV. R 1417.68
ELEV. S 1417.66
PROP.
RADIUS DELTA lENGlH
60.00' 13'10'44" 13.80'
90.00' 27'15'58" 42.83'
90.00' 27'15'58" 42.83'
·~ --- • • I ·•····-· •••• ~-- \ ________ ----;-
- , ..... ,_ .. _ ··--·
l.. S:i.0,0021
Qtl'.>c' 59 .z . cfs
V100= 4.7 fps
: Q1~= $j .8; (?fS_~
• V100= 4.1 fps
,-,, •~ •• ••~•'<• •! C ... -,~.
,, ...
:
12 JS STA 12+36.55
ANGLE A 90'00'00"
B 24•
C 3.50'
D 48"
E 1.44'
F 1.85'
G 1.59'
12 L 2.88'
ELEV. R 1417.71
ELEV. S 1417.70
12 8
TANGENT
6.93'
21.83'
21.83'
13 Q rnl,,,, 4~. 9 cfs ;
! V1ob= 3;,7 fps
14 JS STA 13+56.35
7 6
ANGLE A
B
C
D
E
F
G
L
ELEV. R
ELEV. S
90'00'00"
30"
3.50'
48"
2.25'
1.56'
1.35'
3.50'
1417.77
1417.76
··--...... -·· -- .. , ...
' , 1 I
Q,oo,,,:31,.9 cfs
v,oo,= 2.5 fps
15 8
15 0
·---· "t<j
· .. ·,·,,····'l;;;:==:c"fs;;::;;========8'=.c.c==7£cc=·ccc· c.c· "'~·· f=c· ~~~~-·~-¼¾ ,_. ' -----y---4\ - . ~ ,. 1
\
\
i
6 7
12 14 14 8
"' . .... IX)
.; -
NC,
+z OW
6 7
'--: - --·-·
48" RCf' (DH 6!)0) •. , •. -.. ··--"·"·-.,•-·· --•-'."--•··-· ~--·,-. ··•·····+·!I ,. ·:
.. ; Q•O\l= 2~.8 :cts
i. v,oo= 2:3 fps
:c... ' •
'
16 7
6 PROP. R/w
17 TS STA 16+75.68
ANGLE A 90'00'00"
B 36"
C 3.67'
48" & 36"
L 6.08'
ELEV. R 1418.40
ELEV. S 1418.39
13 ' - - ....-----, --
; .•• :•·.•• "15Jrrr··oF36i R¢P (D"'1'400~ •••
•. 9ioo=i!i,Q,ts. .. .1 ............ L...... L ... : ..... :
Vioo= ~.3 -fps •
18 MH STA 18+80.18
ANGLE A 45'00'00"
B 18"
C 5.01'
36"
L 5.18'
ELEV. R 1419.26
ELEV. S 1419.23
/
NOTE
_l___ '
JPRQP J F$ ~· ¢/U Of ~I)
' ;
+PROf!; FS @ C/L Qt sir,.'"" .
1 • : :
: 1-4i2;3~ - -1
.: ... tc. ,
1423;¾9
:IC·
1i423,29·
TC;.
' -, "
.
PROFILE SCALES
HORIZ. 1· = 40'
VERT. 1" = 4•
19 142f'
•. .
:·· k· • • c-·'1413··
15• RCP (D-1600)
. iAtE:AAI.. ;"M".'"~~ ...
· ! 1'423:26
:.re, ..
•. t"' ... i
:
AS Bt//LT
TIIE. ~AN'S ,fU'F/:§'CT ,,,NY 5VSSTAAIT/,U.
tJ ,P;/?()Y/,1).ez> TtJ
T
C#76Z
aJAff,f?ACTQ /4'
,,-~r
CONSTRUCTION NOTES
INSTALL 48" RCP. D-LOAD PER PLAN
INSTALL 36" RCP, D-LOAD PER PLAN
INTENTIONALLY LEFT BLANK
INSTALL 24" RCP, D-LOAD PER PLAN
INSTALL 18" RCP, D-LOAD PER PLAN
CONSTRUCT CURB OPENING CATCH BASIN PER Af'WA SID. PLAN 300-2 (H=4" - W NOTED ON PLANS)
CONSTRUCT LOCAL DEPRESSION PER AWA SID. PLAN 313-1 CASE B CONSTRUCT MANHOLE NO. 2 PER RCFCD STD. DWG. NO. MH252
CONSTRUCT MANHOLE NO. 4 PER RCFCD STD. DWG. NO. MH254
INTENTIONALLY LEFT BLANK
CONSTRUCT MANHOLE NO. 1 PER RCFCD STD. DWG. NO. MH251
CONSlRUCT JUNCTION STRUCTURE NO. 2 PER RCFCD STD. DWG. NO. JS227 CONSTRUCT J.RANSITION STRUC1UR£ NO. 3 PER RCFCD STD. DWG. NO. TS303 CONSTRUCT JUNCTION STRUCTURE NO. 4 PER RCFCD STD. OWG. NO. JS229 ALL ON-SITE STORM DRAIN AND PRIVATE LATERALS REFERRED TO ON THESE PLANS ARE ro BE CONSTRUCTED PER SEPARATE ON-SITE DRAINAGE PLANS AND CONCURRENTI.Y WITH PUBLIC STORM DRAIN SHOWN HEREON. GRAP)-lIC SCALE 1"=40' '
i
40 80 120
CITY Of" PERRIS SHEET
2 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 422
Menifee Mayor and City Council
July 15, 2026
Page
1052 of 3153
~
.,;
' ~ ,, . ., ---- . ..,....,,
-·I--
: __ 1 ll _ -:- ; _ : : _
--1:- ,-- -
ti
·• -,'--~-{ --
-+- -· -1421·.4 -
T i i't]'f· Ft"c.J:.:t:f . -:
•---~·"=-··'.i-'..:.c.·7"·.:;,::;::_:.;..·~:--.;_~-t---'--r-:-~ 'J
.. -
~-~-+
- ' . l • ---- ;-----··--:···· ----·.• ... ', .. ·u---~=,,-,--, ,:,C,=- o'"-'=o·,,, ="4,-, ,,="-• • ~j=-+,=· - ;. ---- -;- ~ J '
'";_I".
TC:
:142G.oQ
" , :UP --
' +- .
:PROP;' f~ t·c/t1°'; sp:s;_j
_..,,
1421(
' . -L .... :. -- I I
H
t I
. -- , -- - -- r
'
. l 18~ Ref' ($-1900}:
LATERAL: '"M-6.. -
- •,'" ; •·• C ,, V • •-~
'
1424.77
,re
, ·f· ... ,, "' .. ,, , ... , .... ,----
142~.35""
__ , ·""·'·+TG
'·iPROP;·Fs-•-e/1.-;t d~~~!
i ' ' ' ' j
' ' ,,;,. __ ,, 1--0-_,', .. ,,. --,--... -,, ... ,,., ,., ' .. , . ., . .,., .. ,,., '" ,- -l
1,4,21i
\
36, RCP (P-1!400)
,i-,_;,,,:_,..,_;:=4·'·="=' "-=+"""-'=4==="'+="""==4"'·=···4;=.,-=·,,;,·=r=+==b=+:Q;-'~~F;::;;.8~i~;,,;_~~--•-2.-·--b==.===y==-=,,fi=p·=·7··'=-,-=-4··=·=-==b='="==,==·=··cl'=---i--=c-=·'·=···'"-··=--='=·--.,=·'·~b=b4===+=+='=~Cl~.-'::,:""~-=:a:--6~_-2~----~cfs,----~·=t'=··+=='=4=-=F'=~=--4===+-='=4=""f=c==,-:';'o;:',"'::··--==";_-lif.:_3~-----'?-~::-":"·--=-='f"'=· -'='f"i' :~''1''.'.'1;4 fps V1ocj= 3,5 fps . v,'l'= ~2 fps
J
9. "' "' 0
r--
g
N
a,
N
e
19 TS STA 23+29.10
ANGLE A 90'00'00"
B 18"
C 3.04'
36" & 24"
L 4.25'
ELEV. R 1420.24
ELEV. S 1420.23
CUIM DATA TABLE RADIUS DEJJj
90.00' 89"59'11"
45.00' 45'00'00"
BENCHMARK
RIVERSIDE COUNTY B.M. M-26--2, BRASS DISC ON BRIDGE
El£V = 1423,462, DATUM NGV029.
LENGTH
141.35'
35.34'
• 'U
~
AT TiiE SOUTHWEST CORNER OF TiiE BRIDGE SO 14-P 0\/ER TiiE SAN JACIN10 RI\IER AT NIJE\/0 RO.AD; 14.0 FEET SOUTH Of NUEVO ROAO; A BRASS DISK SET IN THE TOP OF A CONCRETE BRIDGE ABUTIIOO AND MARKEO M-26-2 1963. st
'j''l----------------------------1 , THE PRIVATE ENGINEER SIGNING THESE PLANS IS RESPONSIBLE FOR 0 ASSURING THE ACCURACY ANO ACCfPTAfllUTY Of THE DESIGN HEREON. ,.. IN TiiE EVENT OF DISCREPANCIES ARISING AFTER Cl1Y APPROVAL OR g DURING CONS!RUCTION, TiiE PRIVATE ENGINEER SHALL BE RESPONSIBLE "' FOR DETERMINING AN ACCEPTABLE SOLUTION AND REVISING THE PLANS 0 FOR APPROVAL BY THE CTTY.
20 21
TANGENT
89.98'
18.64'
~
OIAL
BEFORE
YOU DIG
lWO WORKING
DAYS BEFORE
YOU DIG
TOLL FREE A PUBLIC SEVICE BY 1-800-227-2600
UNDERGROUND SERVICE ALERT
\
\\
22 \ -=---~--- --\ -~ ~- ~/
-~-- .S- --- ---
DATE BY MARK
ENGINEER
DESIGNED BY:
23 2-4 25
LINB
SEAL SEAL
APPR. DA'CE
REVISIONS CITY
RB DRAWN BY: BTE CHECKED BY: RB
26 27
\
\
\
'
PROFILE SCALES
HORIZ.
VERT.
28 ~- _____ ,,.-,- ~ -
1· = 40'
1· = 4'
JS STA 26+19.61
ANGLE A 90'00'00"
B 18"
C 2.33'
D 24"
l,+15:-
• '
. ' '
- ,,.,,.1i,o-+bf-Of .. ,
--l--
A5 8t/lLT
T/IESf.,..,LAN'S' /4'.£','LECT ,<NY 5VBSTA,VT/,<,;
,t),£'5'/, ,M,t)t)/~/a .:?AIS. ,,rs ,P,l'tJ/"/P£D TO
WE,I, ASS& :-9T. :,;- ',!I~ ';f'E L:'dAl./':PACTtJR
I ~~ '.1:,tE:::-~ b-l-r'
'PT ;,ATE
CONSTRUCTION NOTES
Ci)
©
@
@
@
@
@
@
INSTALL 48" RCP, 0-LOAD PER PlAN
INSTAU. 36" RCP, 0-LOAD PER PlAN
INTENTIONALLY LEFT Bt.ANK
INSTALL 24" RCP, D-LOAD PER PlAN
INSTALL 18" RCP, 0-LOAD PER PlAN
CONSTRUCT CURB OPENING CATCH BASIN PER APWf\. STD, PIAN 300-2 (H=4" - W NOTED ON PLANS)
/
CONSTRUCT LOCAL DEPRESSION PER AWA STD. PIAN 313-1 CASE B CONSTRUCT MANHOLE ~0, 2 PER RCFCO STD. OWG. NO. MH252
'
CONSTRUCT MANHOLE l'J,O. 4 PER RCFCO STD. DWG. NO. MH254 INTENTIONALLY LEFT BlANK
CONSTRUCT MANHOLE NO. 1 PER RCFCD STD, DWG. NO. MH251
CONSTRUCT JUNCTION STRUCTURE NO. 2 PER RCFCD STD. DWG, NO. JS227 CONSTRUCT TRANSmON STRUCTURE NO. 3 PER RCFCD STD. DWG. NO. TS303 CONSTRUCT JUNCTION STRUCTURE NO, 4 PER RCFCD STD. DWG, NO, JS229 ii E 1.13'
F 0.75'
12 APPROVED BY:
R.C.E. NO. C44762
• "' -
~~
~,;, -
~ .,> ~
G 0.65'
L 2.25'
"'"'· "'· ,:;,
9,
0 <
DATE:
EXP. DATE
ELEV. R 1420.81
ELEV. S 1420.79
NOTE
AU. ON-SITE STORM DRAIN AND PRIVATE LATERALS REFERRED TO ON THESE Pl.ANS ARE TO BE CONSTRUCTED PER SEPARATE ON-SITE DRAINAGE PlANS AND CONCURRENTLY WITH PUBLIC STORM DRAIN SHOWN HEREON.
3-31-08
ALBERT A.
WEBB
ASSOCIATES
ENGINEERING CONSULTANTS
SCALE: AS SHOWN
DATE: Feb 2007
CIVIL ENGINEERS
3788 McCRAY STREET
RIVERSIDE, CA. 92506
PH: (951) 686-1070
FAX: (951) 788-1256
GRAPHIC SCALE 1 "=40'
..::..~ '
40 20 0 40 80 120
CITY OF" PERRIS SHEET
STORM DRAIN Pl.ANS
CUSSIC PACIFIC BUSINII88 PARK (PM 94082. 3
Pl.AN AND PROFILE OF~SHEETS
STA. 19+00 TO STA. 28+06 CHY FlLE NO:
FOR: CLASSIC PACIFIC P8-921
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 423
Menifee Mayor and City Council
July 15, 2026
Page
1053 of 3153
APPENDIX B
HYDROLOGY CALCULATIONS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 424
Menifee Mayor and City Council
July 15, 2026
Page
1054 of 3153
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON
RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL
(c) Copyright 1982-2016 Advanced Engineering Software (aes) (Rational Tabling Version 23.0)
Release Date: 07/01/2016 License ID 1435
Analysis prepared by:
THIENES ENGINEERING, INC.
14349 FIRESTONE BLVD
LA MIRIADA, CA 90638
714-521-4811
************************** DESCRIPTION OF STUDY ************************** * TEI JOB NUMBER 4100 * * EXISTING CONDITIONS * * 100-YEAR STORM EVENT * ************************************************************************** FILE NAME: W:\4100\X100.DAT
TIME/DATE OF STUDY: 13:41 03/14/2024
---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
---------------------------------------------------------------------------- USER SPECIFIED STORM EVENT(YEAR) = 100.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 2-YEAR, 1-HOUR PRECIPITATION(INCH) = 0.450
100-YEAR, 1-HOUR PRECIPITATION(INCH) = 1.200
COMPUTED RAINFALL INTENSITY DATA:
STORM EVENT = 100.00 1-HOUR INTENSITY(INCH/HOUR) = 1.200 SLOPE OF INTENSITY DURATION CURVE = 0.5000
RCFC&WCD HYDROLOGY MANUAL "C"-VALUES USED FOR RATIONAL METHOD NOTE: CONSIDER ALL CONFLUENCE STREAM COMBINATIONS
FOR ALL DOWNSTREAM ANALYSES
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
**************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 829.00
UPSTREAM ELEVATION(FEET) = 1427.57
DOWNSTREAM ELEVATION(FEET) = 1383.71
ELEVATION DIFFERENCE(FEET) = 43.86
TC = 0.533*[( 829.00**3)/( 43.86)]**.2 = 14.097
100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 2.476
UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .7630
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 13.26
TOTAL AREA(ACRES) = 7.02 TOTAL RUNOFF(CFS) = 13.26 ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 7.0 TC(MIN.) = 14.10 PEAK FLOW RATE(CFS) = 13.26
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 425
Menifee Mayor and City Council
July 15, 2026
Page
1055 of 3153
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON
RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL
(c) Copyright 1982-2016 Advanced Engineering Software (aes) (Rational Tabling Version 23.0)
Release Date: 07/01/2016 License ID 1435
Analysis prepared by:
THIENES ENGINEERING, INC.
14349 FIRESTONE BLVD
LA MIRIADA, CA 90638
714-521-4811
************************** DESCRIPTION OF STUDY ************************** * TEI JOB NUMBER 4100 * * EXISTING CONDITIONS * * 100-YEAR STORM EVENT * ************************************************************************** FILE NAME: W:\4100\X110.DAT
TIME/DATE OF STUDY: 16:41 06/13/2022
---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
---------------------------------------------------------------------------- USER SPECIFIED STORM EVENT(YEAR) = 12.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 2-YEAR, 1-HOUR PRECIPITATION(INCH) = 0.450
100-YEAR, 1-HOUR PRECIPITATION(INCH) = 1.200
COMPUTED RAINFALL INTENSITY DATA:
STORM EVENT = 12.00 1-HOUR INTENSITY(INCH/HOUR) = 0.798 SLOPE OF INTENSITY DURATION CURVE = 0.5000
RCFC&WCD HYDROLOGY MANUAL "C"-VALUES USED FOR RATIONAL METHOD NOTE: CONSIDER ALL CONFLUENCE STREAM COMBINATIONS
FOR ALL DOWNSTREAM ANALYSES
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
**************************************************************************** FLOW PROCESS FROM NODE 110.00 TO NODE 111.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 719.00
UPSTREAM ELEVATION(FEET) = 1430.44
DOWNSTREAM ELEVATION(FEET) = 1383.71
ELEVATION DIFFERENCE(FEET) = 46.73
TC = 0.533*[( 719.00**3)/( 46.73)]**.2 = 12.780
12 YEAR RAINFALL INTENSITY(INCH/HOUR) = 1.730
USER-SPECIFIED RUNOFF COEFFICIENT = .7160
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 10.99
TOTAL AREA(ACRES) = 8.87 TOTAL RUNOFF(CFS) = 10.99 ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 8.9 TC(MIN.) = 12.78 PEAK FLOW RATE(CFS) = 10.99
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 426
Menifee Mayor and City Council
July 15, 2026
Page
1056 of 3153
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON
RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL
(c) Copyright 1982-2016 Advanced Engineering Software (aes) (Rational Tabling Version 23.0)
Release Date: 07/01/2016 License ID 1435
Analysis prepared by:
THIENES ENGINEERING, INC.
14349 FIRESTONE BLVD
LA MIRIADA, CA 90638
714-521-4811
************************** DESCRIPTION OF STUDY ************************** * TEI JOB NUMBER 4100 * * EXISTING CONDITIONS * * 100-YEAR STORM EVENT * ************************************************************************** FILE NAME: W:\4100\X120.DAT
TIME/DATE OF STUDY: 16:45 06/13/2022
---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
---------------------------------------------------------------------------- USER SPECIFIED STORM EVENT(YEAR) = 12.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 2-YEAR, 1-HOUR PRECIPITATION(INCH) = 0.450
100-YEAR, 1-HOUR PRECIPITATION(INCH) = 1.200
COMPUTED RAINFALL INTENSITY DATA:
STORM EVENT = 12.00 1-HOUR INTENSITY(INCH/HOUR) = 0.798 SLOPE OF INTENSITY DURATION CURVE = 0.5000
RCFC&WCD HYDROLOGY MANUAL "C"-VALUES USED FOR RATIONAL METHOD NOTE: CONSIDER ALL CONFLUENCE STREAM COMBINATIONS
FOR ALL DOWNSTREAM ANALYSES
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
**************************************************************************** FLOW PROCESS FROM NODE 120.00 TO NODE 121.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 515.00
UPSTREAM ELEVATION(FEET) = 1428.54
DOWNSTREAM ELEVATION(FEET) = 1427.76
ELEVATION DIFFERENCE(FEET) = 0.78
TC = 0.533*[( 515.00**3)/( 0.78)]**.2 = 23.717
12 YEAR RAINFALL INTENSITY(INCH/HOUR) = 1.270
UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .6667
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 0.28
TOTAL AREA(ACRES) = 0.33 TOTAL RUNOFF(CFS) = 0.28 **************************************************************************** FLOW PROCESS FROM NODE 121.00 TO NODE 122.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1427.76 DOWNSTREAM(FEET) = 1427.52 CHANNEL LENGTH THRU SUBAREA(FEET) = 186.00 CHANNEL SLOPE = 0.0013 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 427
Menifee Mayor and City Council
July 15, 2026
Page
1057 of 3153
NOTE: CHANNEL FLOW OF 1. CFS WAS ASSUMED IN VELOCITY ESTIMATION CHANNEL FLOW THRU SUBAREA(CFS) = 0.28
FLOW VELOCITY(FEET/SEC) = 0.54 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 5.75 Tc(MIN.) = 29.47
LONGEST FLOWPATH FROM NODE 120.00 TO NODE 122.00 = 701.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 122.00 TO NODE 122.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 12 YEAR RAINFALL INTENSITY(INCH/HOUR) = 1.139
UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .6474
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.98 SUBAREA RUNOFF(CFS) = 0.72 TOTAL AREA(ACRES) = 1.3 TOTAL RUNOFF(CFS) = 1.00 TC(MIN.) = 29.47
============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 1.3 TC(MIN.) = 29.47 PEAK FLOW RATE(CFS) = 1.00
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 428
Menifee Mayor and City Council
July 15, 2026
Page
1058 of 3153
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON
RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL
(c) Copyright 1982-2016 Advanced Engineering Software (aes) (Rational Tabling Version 23.0)
Release Date: 07/01/2016 License ID 1435
Analysis prepared by:
THIENES ENGINEERING, INC.
14349 FIRESTONE BLVD
LA MIRIADA, CA 90638
714-521-4811
************************** DESCRIPTION OF STUDY ************************** * TEI JOB NUMBER 4100 * * EXISTING OFFSITE CONDITIONS * * 100-YEAR STORM EVENT * ************************************************************************** FILE NAME: W:\4100\X200.DAT
TIME/DATE OF STUDY: 14:00 03/14/2024
---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
---------------------------------------------------------------------------- USER SPECIFIED STORM EVENT(YEAR) = 12.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 2-YEAR, 1-HOUR PRECIPITATION(INCH) = 0.450
100-YEAR, 1-HOUR PRECIPITATION(INCH) = 1.200
COMPUTED RAINFALL INTENSITY DATA:
STORM EVENT = 12.00 1-HOUR INTENSITY(INCH/HOUR) = 0.798 SLOPE OF INTENSITY DURATION CURVE = 0.5000
RCFC&WCD HYDROLOGY MANUAL "C"-VALUES USED FOR RATIONAL METHOD NOTE: CONSIDER ALL CONFLUENCE STREAM COMBINATIONS
FOR ALL DOWNSTREAM ANALYSES
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
**************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 201.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 675.00
UPSTREAM ELEVATION(FEET) = 1431.36
DOWNSTREAM ELEVATION(FEET) = 1428.21
ELEVATION DIFFERENCE(FEET) = 3.15
TC = 0.533*[( 675.00**3)/( 3.15)]**.2 = 21.102
12 YEAR RAINFALL INTENSITY(INCH/HOUR) = 1.346
UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .6766
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 2.08
TOTAL AREA(ACRES) = 2.28 TOTAL RUNOFF(CFS) = 2.08 ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 2.3 TC(MIN.) = 21.10 PEAK FLOW RATE(CFS) = 2.08
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 429
Menifee Mayor and City Council
July 15, 2026
Page
1059 of 3153
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON
RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL
(c) Copyright 1982-2016 Advanced Engineering Software (aes) (Rational Tabling Version 23.0)
Release Date: 07/01/2016 License ID 1435
Analysis prepared by:
************************** DESCRIPTION OF STUDY ************************** * TEI JOB NUMBER 4100 * * PROPOSED CONDITIONS * * 100-YEAR STORM EVENT * ************************************************************************** FILE NAME: Z:\4100\P100.DAT
TIME/DATE OF STUDY: 14:33 08/06/2025
---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
---------------------------------------------------------------------------- USER SPECIFIED STORM EVENT(YEAR) = 100.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 2-YEAR, 1-HOUR PRECIPITATION(INCH) = 0.450
100-YEAR, 1-HOUR PRECIPITATION(INCH) = 1.200
COMPUTED RAINFALL INTENSITY DATA:
STORM EVENT = 100.00 1-HOUR INTENSITY(INCH/HOUR) = 1.200 SLOPE OF INTENSITY DURATION CURVE = 0.5000
RCFC&WCD HYDROLOGY MANUAL "C"-VALUES USED FOR RATIONAL METHOD NOTE: CONSIDER ALL CONFLUENCE STREAM COMBINATIONS
FOR ALL DOWNSTREAM ANALYSES
*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) === ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
**************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS COMMERCIAL
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 224.00
UPSTREAM ELEVATION(FEET) = 1426.03
DOWNSTREAM ELEVATION(FEET) = 1422.50
ELEVATION DIFFERENCE(FEET) = 3.53
TC = 0.303*[( 224.00**3)/( 3.53)]**.2 = 6.056
100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.777
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8905
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 6.26
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 430
Menifee Mayor and City Council
July 15, 2026
Page
1060 of 3153
TOTAL AREA(ACRES) = 1.86 TOTAL RUNOFF(CFS) = 6.26 **************************************************************************** FLOW PROCESS FROM NODE 101.00 TO NODE 101.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.777
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8905
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.54 TOTAL AREA(ACRES) = 2.0 TOTAL RUNOFF(CFS) = 6.79 TC(MIN.) = 6.06
**************************************************************************** FLOW PROCESS FROM NODE 101.00 TO NODE 102.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1419.97 DOWNSTREAM(FEET) = 1419.76 FLOW LENGTH(FEET) = 100.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.60
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 6.79
PIPE TRAVEL TIME(MIN.) = 0.46 Tc(MIN.) = 6.52
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 102.00 = 324.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 102.00 TO NODE 102.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.641
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8902
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 1.05 SUBAREA RUNOFF(CFS) = 3.40 TOTAL AREA(ACRES) = 3.1 TOTAL RUNOFF(CFS) = 10.20 TC(MIN.) = 6.52
**************************************************************************** FLOW PROCESS FROM NODE 102.00 TO NODE 102.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.641
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8902
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.71 TOTAL AREA(ACRES) = 3.3 TOTAL RUNOFF(CFS) = 10.91 TC(MIN.) = 6.52
**************************************************************************** FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1419.76 DOWNSTREAM(FEET) = 1419.56 FLOW LENGTH(FEET) = 100.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 27.0 INCH PIPE IS 17.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.03
ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 10.91
PIPE TRAVEL TIME(MIN.) = 0.41 Tc(MIN.) = 6.93
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 103.00 = 424.00 FEET. **************************************************************************** Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 431
Menifee Mayor and City Council
July 15, 2026
Page
1061 of 3153
FLOW PROCESS FROM NODE 103.00 TO NODE 103.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.530
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8899
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 1.05 SUBAREA RUNOFF(CFS) = 3.30 TOTAL AREA(ACRES) = 4.3 TOTAL RUNOFF(CFS) = 14.21 TC(MIN.) = 6.93
**************************************************************************** FLOW PROCESS FROM NODE 103.00 TO NODE 103.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.530
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8899
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.69 TOTAL AREA(ACRES) = 4.6 TOTAL RUNOFF(CFS) = 14.90 TC(MIN.) = 6.93
**************************************************************************** FLOW PROCESS FROM NODE 103.00 TO NODE 104.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1419.56 DOWNSTREAM(FEET) = 1419.35 FLOW LENGTH(FEET) = 100.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 27.0 INCH PIPE IS 22.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.30
ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 14.90
PIPE TRAVEL TIME(MIN.) = 0.39 Tc(MIN.) = 7.32
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 104.00 = 524.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 104.00 TO NODE 104.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.436
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8897
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 1.05 SUBAREA RUNOFF(CFS) = 3.21 TOTAL AREA(ACRES) = 5.6 TOTAL RUNOFF(CFS) = 18.11 TC(MIN.) = 7.32
**************************************************************************** FLOW PROCESS FROM NODE 104.00 TO NODE 104.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.436
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8897
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.67 TOTAL AREA(ACRES) = 5.8 TOTAL RUNOFF(CFS) = 18.78 TC(MIN.) = 7.32
**************************************************************************** FLOW PROCESS FROM NODE 104.00 TO NODE 105.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1419.35 DOWNSTREAM(FEET) = 1419.12 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 432
Menifee Mayor and City Council
July 15, 2026
Page
1062 of 3153
FLOW LENGTH(FEET) = 119.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 30.0 INCH PIPE IS 24.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.42
ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 18.78
PIPE TRAVEL TIME(MIN.) = 0.45 Tc(MIN.) = 7.77
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 105.00 = 643.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 105.00 TO NODE 105.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.335
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8894
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 2.09 SUBAREA RUNOFF(CFS) = 6.20 TOTAL AREA(ACRES) = 7.9 TOTAL RUNOFF(CFS) = 24.98 TC(MIN.) = 7.77
**************************************************************************** FLOW PROCESS FROM NODE 105.00 TO NODE 105.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.335
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8894
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.47 SUBAREA RUNOFF(CFS) = 1.39 TOTAL AREA(ACRES) = 8.4 TOTAL RUNOFF(CFS) = 26.38 TC(MIN.) = 7.77
**************************************************************************** FLOW PROCESS FROM NODE 105.00 TO NODE 106.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1419.12 DOWNSTREAM(FEET) = 1418.77 FLOW LENGTH(FEET) = 174.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 36.0 INCH PIPE IS 25.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.00
ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 26.38
PIPE TRAVEL TIME(MIN.) = 0.58 Tc(MIN.) = 8.35
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 106.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 106.00 TO NODE 106.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.217
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8891
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.88 SUBAREA RUNOFF(CFS) = 2.52 TOTAL AREA(ACRES) = 9.3 TOTAL RUNOFF(CFS) = 28.89 TC(MIN.) = 8.35
**************************************************************************** FLOW PROCESS FROM NODE 106.00 TO NODE 107.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1418.77 DOWNSTREAM(FEET) = 1417.64 FLOW LENGTH(FEET) = 564.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 36.0 INCH PIPE IS 27.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.06
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 433
Menifee Mayor and City Council
July 15, 2026
Page
1063 of 3153
ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 28.89
PIPE TRAVEL TIME(MIN.) = 1.86 Tc(MIN.) = 10.21
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 107.00 = 1381.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 107.00 TO NODE 107.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 2.910
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8881
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 0.76 SUBAREA RUNOFF(CFS) = 1.96 TOTAL AREA(ACRES) = 10.0 TOTAL RUNOFF(CFS) = 30.86 TC(MIN.) = 10.21
**************************************************************************** FLOW PROCESS FROM NODE 107.00 TO NODE 214.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1417.64 DOWNSTREAM(FEET) = 1417.12 FLOW LENGTH(FEET) = 258.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 36.0 INCH PIPE IS 28.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.10
ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 30.86
PIPE TRAVEL TIME(MIN.) = 0.84 Tc(MIN.) = 11.05
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 214.00 = 1639.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 214.00 TO NODE 214.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 201.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS COMMERCIAL
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 256.00
UPSTREAM ELEVATION(FEET) = 1425.92
DOWNSTREAM ELEVATION(FEET) = 1424.65
ELEVATION DIFFERENCE(FEET) = 1.27
TC = 0.303*[( 256.00**3)/( 1.27)]**.2 = 8.049
100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.276
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8892
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 2.07
TOTAL AREA(ACRES) = 0.71 TOTAL RUNOFF(CFS) = 2.07 **************************************************************************** FLOW PROCESS FROM NODE 201.00 TO NODE 202.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1422.48 DOWNSTREAM(FEET) = 1420.79 FLOW LENGTH(FEET) = 339.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 12.0 INCH PIPE IS 7.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.75
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 2.07
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 434
Menifee Mayor and City Council
July 15, 2026
Page
1064 of 3153
PIPE TRAVEL TIME(MIN.) = 1.51 Tc(MIN.) = 9.56
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 202.00 = 595.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 202.00 TO NODE 202.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.007
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8884
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 1.57 SUBAREA RUNOFF(CFS) = 4.19 TOTAL AREA(ACRES) = 2.3 TOTAL RUNOFF(CFS) = 6.26 TC(MIN.) = 9.56
**************************************************************************** FLOW PROCESS FROM NODE 202.00 TO NODE 213.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1420.79 DOWNSTREAM(FEET) = 1420.69 FLOW LENGTH(FEET) = 347.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 30.0 INCH PIPE IS 21.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 1.68
ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 6.26
PIPE TRAVEL TIME(MIN.) = 3.44 Tc(MIN.) = 12.99
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 213.00 = 942.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 212.00 TO NODE 212.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 12.99
RAINFALL INTENSITY(INCH/HR) = 2.58
TOTAL STREAM AREA(ACRES) = 2.28
PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.26
**************************************************************************** FLOW PROCESS FROM NODE 210.00 TO NODE 211.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
============================================================================
ASSUMED INITIAL SUBAREA UNIFORM
DEVELOPMENT IS COMMERCIAL
TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2
INITIAL SUBAREA FLOW-LENGTH(FEET) = 292.00
UPSTREAM ELEVATION(FEET) = 1427.01
DOWNSTREAM ELEVATION(FEET) = 1424.61
ELEVATION DIFFERENCE(FEET) = 2.40
TC = 0.303*[( 292.00**3)/( 2.40)]**.2 = 7.670
100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.356
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8895
SOIL CLASSIFICATION IS "D"
SUBAREA RUNOFF(CFS) = 7.16
TOTAL AREA(ACRES) = 2.40 TOTAL RUNOFF(CFS) = 7.16 **************************************************************************** FLOW PROCESS FROM NODE 211.00 TO NODE 212.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1421.61 DOWNSTREAM(FEET) = 1420.89 FLOW LENGTH(FEET) = 144.00 MANNING'S N = 0.012
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 435
Menifee Mayor and City Council
July 15, 2026
Page
1065 of 3153
DEPTH OF FLOW IN 18.0 INCH PIPE IS 13.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.03
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 7.16
PIPE TRAVEL TIME(MIN.) = 0.48 Tc(MIN.) = 8.15
LONGEST FLOWPATH FROM NODE 210.00 TO NODE 212.00 = 436.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 212.00 TO NODE 212.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.257
COMMERCIAL DEVELOPMENT RUNOFF COEFFICIENT = .8892
SOIL CLASSIFICATION IS "D"
SUBAREA AREA(ACRES) = 2.47 SUBAREA RUNOFF(CFS) = 7.15 TOTAL AREA(ACRES) = 4.9 TOTAL RUNOFF(CFS) = 14.32 TC(MIN.) = 8.15
**************************************************************************** FLOW PROCESS FROM NODE 212.00 TO NODE 213.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1420.89 DOWNSTREAM(FEET) = 1420.69 FLOW LENGTH(FEET) = 40.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 24.0 INCH PIPE IS 17.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.03
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 14.32
PIPE TRAVEL TIME(MIN.) = 0.11 Tc(MIN.) = 8.26
LONGEST FLOWPATH FROM NODE 210.00 TO NODE 213.00 = 476.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 213.00 TO NODE 213.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 8.26
RAINFALL INTENSITY(INCH/HR) = 3.23
TOTAL STREAM AREA(ACRES) = 4.87
PEAK FLOW RATE(CFS) AT CONFLUENCE = 14.32
** CONFLUENCE DATA **
STREAM RUNOFF Tc INTENSITY AREA
NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE)
1 6.26 12.99 2.579 2.28
2 14.32 8.26 3.235 4.87
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM RUNOFF Tc INTENSITY
NUMBER (CFS) (MIN.) (INCH/HOUR)
1 18.30 8.26 3.235
2 17.68 12.99 2.579
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 18.30 Tc(MIN.) = 8.26
TOTAL AREA(ACRES) = 7.1
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 213.00 = 942.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 213.00 TO NODE 214.00 IS CODE = 31 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 436
Menifee Mayor and City Council
July 15, 2026
Page
1066 of 3153
---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1420.69 DOWNSTREAM(FEET) = 1417.12 FLOW LENGTH(FEET) = 293.00 MANNING'S N = 0.012
DEPTH OF FLOW IN 21.0 INCH PIPE IS 17.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.75
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 18.30
PIPE TRAVEL TIME(MIN.) = 0.56 Tc(MIN.) = 8.81
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 214.00 = 1235.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 214.00 TO NODE 214.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM RUNOFF Tc INTENSITY AREA
NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE)
1 18.30 8.81 3.131 7.15
2 17.68 13.55 2.525 7.15
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 214.00 = 1235.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM RUNOFF Tc INTENSITY AREA
NUMBER (CFS) (MIN.) (INCH/HOUR) (ACRE)
1 30.86 11.05 2.796 10.03
LONGEST FLOWPATH FROM NODE 100.00 TO NODE 214.00 = 1639.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM RUNOFF Tc INTENSITY
NUMBER (CFS) (MIN.) (INCH/HOUR)
1 42.92 8.81 3.131
2 47.20 11.05 2.796
3 45.54 13.55 2.525
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 47.20 Tc(MIN.) = 11.05
TOTAL AREA(ACRES) = 17.2
============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 17.2 TC(MIN.) = 11.05 PEAK FLOW RATE(CFS) = 47.20
*** PEAK FLOW RATE TABLE ***
Q(CFS) Tc(MIN.)
1 42.92 8.81
2 47.20 11.05
3 45.54 13.55
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 437
Menifee Mayor and City Council
July 15, 2026
Page
1067 of 3153
APPENDIX C
DETENTION CALCULATIONS
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 438
Menifee Mayor and City Council
July 15, 2026
Page
1068 of 3153
Elevation Depth Area Volume S Volume S Volume
(feet) (sq. ft.) (c.f.) (c.f.) (ac-ft)
1424.48 0.00 0
372 372 0.01
1424.60 0.12 6200
1363 1,735 0.04
1424.70 0.22 21065
3150 4,885 0.11
1424.80 0.32 41936
4993 9,878 0.23
1424.90 0.42 57915
6390 16,268 0.37
1425.00 0.52 69880
7594 23,861 0.55
1425.10 0.62 81997
8813 32,675 0.75
1425.20 0.72 94268
1910 34,585 0.79
1425.22 0.74 96741
8135 42,720 0.98
1425.30 0.82 106640
11281 54,001 1.24
1425.40 0.92 118978
LOVETT 215
PONDING IN EASTERLY TRUCK YARD
Of£S.SiQi,~
1,._00"~1
z
No.3147 fil
~
F CAI.I
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 439
Menifee Mayor and City Council
July 15, 2026
Page
1069 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10B110.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.051 Hr.
Lag time = 3.04 Min.
25% of lag time = 0.76 Min.
40% of lag time = 1.22 Min.
Unit time = 5.00 Min.
Duration of storm = 1 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 0.45 3.78
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.20 10.07
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.450(In)
Area Averaged 100-Year Rainfall = 1.200(In)
Point rain (area averaged) = 0.759(In)
Areal adjustment factor = 99.99 %
Adjusted average point rain = 0.758(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 440
Menifee Mayor and City Council
July 15, 2026
Page
1070 of 3153
8.390 93.00 0.000
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- Slope of intensity-duration curve for a 1 hour storm =0.5000 ---------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 164.477 36.504 3.087 2 0.167 328.955 45.930 3.884 3 0.250 493.432 10.407 0.880 4 0.333 657.909 4.440 0.375 5 0.417 822.386 2.719 0.230 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 4.20 0.382 0.091 ( 0.344) 0.291 2 0.17 4.30 0.391 0.091 ( 0.352) 0.300 3 0.25 5.00 0.455 0.091 ( 0.410) 0.364 4 0.33 5.00 0.455 0.091 ( 0.410) 0.364 5 0.42 5.80 0.528 0.091 ( 0.475) 0.437 6 0.50 6.50 0.592 0.091 ( 0.532) 0.501 7 0.58 7.40 0.674 0.091 ( 0.606) 0.583 8 0.67 8.60 0.783 0.091 ( 0.704) 0.692 9 0.75 12.30 1.120 0.091 ( 1.008) 1.029 10 0.83 29.10 2.649 0.091 ( 2.384) 2.558 11 0.92 6.80 0.619 0.091 ( 0.557) 0.528 12 1.00 5.00 0.455 0.091 ( 0.410) 0.364 (Loss Rate Not Used)
Sum = 100.0 Sum = 8.0 Flood volume = Effective rainfall 0.67(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 0.5(Ac.Ft) Total soil loss = 0.09(In)
Total soil loss = 0.064(Ac.Ft)
Total rainfall = 0.76(In)
Flood volume = 20329.1 Cubic Feet
Total soil loss = 2771.5 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 12.868(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 441
Menifee Mayor and City Council
July 15, 2026
Page
1071 of 3153
Time(h+m) Volume Ac.Ft Q(CFS) 0 5.0 10.0 15.0 20.0 ----------------------------------------------------------------------- 0+ 5 0.0062 0.90 VQ | | | | 0+10 0.0204 2.06 |V Q | | | | 0+15 0.0379 2.55 | V Q | | | | 0+20 0.0580 2.91 | VQ | | | | 0+25 0.0805 3.26 | Q | | | | 0+30 0.1064 3.77 | Q V| | | | 0+35 0.1364 4.35 | Q |V | | | 0+40 0.1714 5.09 | Q V | | | 0+45 0.2173 6.67 | | Q V | | | 0+50 0.3058 12.84 | | | QV | | 0+55 0.3944 12.87 | | | Q | V | 1+ 0 0.4355 5.97 | |Q | | V | 1+ 5 0.4567 3.08 | Q | | | V| 1+10 0.4643 1.11 | Q | | | V| 1+15 0.4661 0.26 Q | | | V| 1+20 0.4667 0.08 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 442
Menifee Mayor and City Council
July 15, 2026
Page
1072 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10B310.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.051 Hr.
Lag time = 3.04 Min.
25% of lag time = 0.76 Min.
40% of lag time = 1.22 Min.
Unit time = 5.00 Min.
Duration of storm = 3 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 0.80 6.71
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.80 15.10
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.800(In)
Area Averaged 100-Year Rainfall = 1.800(In)
Point rain (area averaged) = 1.211(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.211(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 443
Menifee Mayor and City Council
July 15, 2026
Page
1073 of 3153
8.390 93.00 0.000
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 164.477 36.504 3.087 2 0.167 328.955 45.930 3.884 3 0.250 493.432 10.407 0.880 4 0.333 657.909 4.440 0.375 5 0.417 822.386 2.719 0.230 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 1.30 0.189 0.091 ( 0.170) 0.098 2 0.17 1.30 0.189 0.091 ( 0.170) 0.098 3 0.25 1.10 0.160 0.091 ( 0.144) 0.069 4 0.33 1.50 0.218 0.091 ( 0.196) 0.127 5 0.42 1.50 0.218 0.091 ( 0.196) 0.127 6 0.50 1.80 0.262 0.091 ( 0.235) 0.171 7 0.58 1.50 0.218 0.091 ( 0.196) 0.127 8 0.67 1.80 0.262 0.091 ( 0.235) 0.171 9 0.75 1.80 0.262 0.091 ( 0.235) 0.171 10 0.83 1.50 0.218 0.091 ( 0.196) 0.127 11 0.92 1.60 0.233 0.091 ( 0.209) 0.142 12 1.00 1.80 0.262 0.091 ( 0.235) 0.171 13 1.08 2.20 0.320 0.091 ( 0.288) 0.229 14 1.17 2.20 0.320 0.091 ( 0.288) 0.229 15 1.25 2.20 0.320 0.091 ( 0.288) 0.229 16 1.33 2.00 0.291 0.091 ( 0.262) 0.200 17 1.42 2.60 0.378 0.091 ( 0.340) 0.287 18 1.50 2.70 0.392 0.091 ( 0.353) 0.301 19 1.58 2.40 0.349 0.091 ( 0.314) 0.258 20 1.67 2.70 0.392 0.091 ( 0.353) 0.301 21 1.75 3.30 0.480 0.091 ( 0.432) 0.389 22 1.83 3.10 0.451 0.091 ( 0.406) 0.360 23 1.92 2.90 0.422 0.091 ( 0.379) 0.331 24 2.00 3.00 0.436 0.091 ( 0.392) 0.345 25 2.08 3.10 0.451 0.091 ( 0.406) 0.360 26 2.17 4.20 0.611 0.091 ( 0.549) 0.520 27 2.25 5.00 0.727 0.091 ( 0.654) 0.636 28 2.33 3.50 0.509 0.091 ( 0.458) 0.418 29 2.42 6.80 0.988 0.091 ( 0.890) 0.897 30 2.50 7.30 1.061 0.091 ( 0.955) 0.970 31 2.58 8.20 1.192 0.091 ( 1.073) 1.101 32 2.67 5.90 0.858 0.091 ( 0.772) 0.767 33 2.75 2.00 0.291 0.091 ( 0.262) 0.200 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 444
Menifee Mayor and City Council
July 15, 2026
Page
1074 of 3153
34 2.83 1.80 0.262 0.091 ( 0.235) 0.171 35 2.92 1.80 0.262 0.091 ( 0.235) 0.171 36 3.00 0.60 0.087 ( 0.091) 0.078 0.009 (Loss Rate Not Used)
Sum = 100.0 Sum = 11.3 Flood volume = Effective rainfall 0.94(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 0.7(Ac.Ft) Total soil loss = 0.27(In)
Total soil loss = 0.190(Ac.Ft)
Total rainfall = 1.21(In)
Flood volume = 28610.3 Cubic Feet
Total soil loss = 8282.7 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 8.263(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0021 0.30 VQ | | | | 0+10 0.0068 0.68 V Q | | | | 0+15 0.0115 0.68 V Q | | | | 0+20 0.0169 0.78 |V Q | | | | 0+25 0.0238 1.01 |V Q | | | | 0+30 0.0319 1.18 |V Q | | | | 0+35 0.0404 1.23 | V Q | | | | 0+40 0.0490 1.25 | V Q | | | | 0+45 0.0586 1.40 | V Q | | | | 0+50 0.0675 1.29 | VQ | | | | 0+55 0.0756 1.17 | Q | | | | 1+ 0 0.0845 1.29 | Q | | | | 1+ 5 0.0954 1.58 | VQ | | | | 1+10 0.1080 1.83 | VQ | | | | 1+15 0.1210 1.89 | Q | | | | 1+20 0.1336 1.83 | QV | | | | 1+25 0.1474 2.00 | Q | | | | 1+30 0.1637 2.36 | Q| | | | 1+35 0.1799 2.35 | QV | | | 1+40 0.1961 2.35 | Q|V | | | 1+45 0.2152 2.78 | |Q V | | | 1+50 0.2362 3.05 | | Q V | | | 1+55 0.2564 2.93 | |Q V | | | 2+ 0 0.2763 2.88 | |Q V | | | 2+ 5 0.2967 2.97 | |Q V | | | 2+10 0.3209 3.51 | | Q V| | | 2+15 0.3519 4.50 | | Q |V | | 2+20 0.3824 4.43 | | Q | V | | 2+25 0.4185 5.23 | | Q V | | 2+30 0.4681 7.21 | | | Q | | 2+35 0.5250 8.26 | | | |V Q | 2+40 0.5797 7.93 | | | |Q V | 2+45 0.6150 5.14 | | Q | V | 2+50 0.6331 2.61 | Q | | V | 2+55 0.6462 1.91 | Q | | | V| 3+ 0 0.6537 1.09 | Q | | | V| 3+ 5 0.6557 0.29 |Q | | | V| 3+10 0.6565 0.11 Q | | | V| 3+15 0.6568 0.04 Q | | | V| 3+20 0.6568 0.00 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 445
Menifee Mayor and City Council
July 15, 2026
Page
1075 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10B610.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.051 Hr.
Lag time = 3.04 Min.
25% of lag time = 0.76 Min.
40% of lag time = 1.22 Min.
Unit time = 5.00 Min.
Duration of storm = 6 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.00 8.39
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 2.50 20.98
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.000(In)
Area Averaged 100-Year Rainfall = 2.500(In)
Point rain (area averaged) = 1.617(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.617(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 446
Menifee Mayor and City Council
July 15, 2026
Page
1076 of 3153
8.390 93.00 0.000
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 164.477 36.504 3.087 2 0.167 328.955 45.930 3.884 3 0.250 493.432 10.407 0.880 4 0.333 657.909 4.440 0.375 5 0.417 822.386 2.719 0.230 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.50 0.097 ( 0.091) 0.087 0.010 2 0.17 0.60 0.116 0.091 ( 0.105) 0.025 3 0.25 0.60 0.116 0.091 ( 0.105) 0.025 4 0.33 0.60 0.116 0.091 ( 0.105) 0.025 5 0.42 0.60 0.116 0.091 ( 0.105) 0.025 6 0.50 0.70 0.136 0.091 ( 0.122) 0.045 7 0.58 0.70 0.136 0.091 ( 0.122) 0.045 8 0.67 0.70 0.136 0.091 ( 0.122) 0.045 9 0.75 0.70 0.136 0.091 ( 0.122) 0.045 10 0.83 0.70 0.136 0.091 ( 0.122) 0.045 11 0.92 0.70 0.136 0.091 ( 0.122) 0.045 12 1.00 0.80 0.155 0.091 ( 0.140) 0.064 13 1.08 0.80 0.155 0.091 ( 0.140) 0.064 14 1.17 0.80 0.155 0.091 ( 0.140) 0.064 15 1.25 0.80 0.155 0.091 ( 0.140) 0.064 16 1.33 0.80 0.155 0.091 ( 0.140) 0.064 17 1.42 0.80 0.155 0.091 ( 0.140) 0.064 18 1.50 0.80 0.155 0.091 ( 0.140) 0.064 19 1.58 0.80 0.155 0.091 ( 0.140) 0.064 20 1.67 0.80 0.155 0.091 ( 0.140) 0.064 21 1.75 0.80 0.155 0.091 ( 0.140) 0.064 22 1.83 0.80 0.155 0.091 ( 0.140) 0.064 23 1.92 0.80 0.155 0.091 ( 0.140) 0.064 24 2.00 0.90 0.175 0.091 ( 0.157) 0.084 25 2.08 0.80 0.155 0.091 ( 0.140) 0.064 26 2.17 0.90 0.175 0.091 ( 0.157) 0.084 27 2.25 0.90 0.175 0.091 ( 0.157) 0.084 28 2.33 0.90 0.175 0.091 ( 0.157) 0.084 29 2.42 0.90 0.175 0.091 ( 0.157) 0.084 30 2.50 0.90 0.175 0.091 ( 0.157) 0.084 31 2.58 0.90 0.175 0.091 ( 0.157) 0.084 32 2.67 0.90 0.175 0.091 ( 0.157) 0.084 33 2.75 1.00 0.194 0.091 ( 0.175) 0.103 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 447
Menifee Mayor and City Council
July 15, 2026
Page
1077 of 3153
34 2.83 1.00 0.194 0.091 ( 0.175) 0.103 35 2.92 1.00 0.194 0.091 ( 0.175) 0.103 36 3.00 1.00 0.194 0.091 ( 0.175) 0.103 37 3.08 1.00 0.194 0.091 ( 0.175) 0.103 38 3.17 1.10 0.213 0.091 ( 0.192) 0.122 39 3.25 1.10 0.213 0.091 ( 0.192) 0.122 40 3.33 1.10 0.213 0.091 ( 0.192) 0.122 41 3.42 1.20 0.233 0.091 ( 0.210) 0.142 42 3.50 1.30 0.252 0.091 ( 0.227) 0.161 43 3.58 1.40 0.272 0.091 ( 0.245) 0.181 44 3.67 1.40 0.272 0.091 ( 0.245) 0.181 45 3.75 1.50 0.291 0.091 ( 0.262) 0.200 46 3.83 1.50 0.291 0.091 ( 0.262) 0.200 47 3.92 1.60 0.310 0.091 ( 0.279) 0.219 48 4.00 1.60 0.310 0.091 ( 0.279) 0.219 49 4.08 1.70 0.330 0.091 ( 0.297) 0.239 50 4.17 1.80 0.349 0.091 ( 0.314) 0.258 51 4.25 1.90 0.369 0.091 ( 0.332) 0.278 52 4.33 2.00 0.388 0.091 ( 0.349) 0.297 53 4.42 2.10 0.408 0.091 ( 0.367) 0.317 54 4.50 2.10 0.408 0.091 ( 0.367) 0.317 55 4.58 2.20 0.427 0.091 ( 0.384) 0.336 56 4.67 2.30 0.446 0.091 ( 0.402) 0.355 57 4.75 2.40 0.466 0.091 ( 0.419) 0.375 58 4.83 2.40 0.466 0.091 ( 0.419) 0.375 59 4.92 2.50 0.485 0.091 ( 0.437) 0.394 60 5.00 2.60 0.505 0.091 ( 0.454) 0.414 61 5.08 3.10 0.602 0.091 ( 0.541) 0.511 62 5.17 3.60 0.699 0.091 ( 0.629) 0.608 63 5.25 3.90 0.757 0.091 ( 0.681) 0.666 64 5.33 4.20 0.815 0.091 ( 0.734) 0.724 65 5.42 4.70 0.912 0.091 ( 0.821) 0.821 66 5.50 5.60 1.087 0.091 ( 0.978) 0.996 67 5.58 1.90 0.369 0.091 ( 0.332) 0.278 68 5.67 0.90 0.175 0.091 ( 0.157) 0.084 69 5.75 0.60 0.116 0.091 ( 0.105) 0.025 70 5.83 0.50 0.097 ( 0.091) 0.087 0.010 71 5.92 0.30 0.058 ( 0.091) 0.052 0.006 72 6.00 0.20 0.039 ( 0.091) 0.035 0.004 (Loss Rate Not Used)
Sum = 100.0 Sum = 13.0 Flood volume = Effective rainfall 1.08(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 0.8(Ac.Ft) Total soil loss = 0.54(In)
Total soil loss = 0.376(Ac.Ft)
Total rainfall = 1.62(In)
Flood volume = 32879.0 Cubic Feet
Total soil loss = 16369.8 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 7.292(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 6 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0002 0.03 Q | | | | 0+10 0.0010 0.12 Q | | | | 0+15 0.0023 0.19 Q | | | | 0+20 0.0037 0.20 Q | | | | 0+25 0.0051 0.21 Q | | | | 0+30 0.0070 0.28 VQ | | | | 0+35 0.0095 0.35 VQ | | | | 0+40 0.0120 0.37 VQ | | | | 0+45 0.0146 0.37 VQ | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 448
Menifee Mayor and City Council
July 15, 2026
Page
1078 of 3153
0+50 0.0172 0.38 VQ | | | | 0+55 0.0198 0.38 |Q | | | | 1+ 0 0.0228 0.44 |Q | | | | 1+ 5 0.0264 0.51 |VQ | | | | 1+10 0.0300 0.53 |VQ | | | | 1+15 0.0337 0.54 |VQ | | | | 1+20 0.0375 0.54 |VQ | | | | 1+25 0.0412 0.54 | Q | | | | 1+30 0.0450 0.54 | Q | | | | 1+35 0.0487 0.54 | Q | | | | 1+40 0.0524 0.54 | Q | | | | 1+45 0.0562 0.54 | Q | | | | 1+50 0.0599 0.54 | QV | | | | 1+55 0.0637 0.54 | QV | | | | 2+ 0 0.0678 0.60 | QV | | | | 2+ 5 0.0721 0.62 | QV | | | | 2+10 0.0764 0.62 | Q V | | | | 2+15 0.0811 0.69 | Q V | | | | 2+20 0.0859 0.70 | Q V | | | | 2+25 0.0908 0.70 | Q V | | | | 2+30 0.0956 0.71 | Q V | | | | 2+35 0.1005 0.71 | Q V | | | | 2+40 0.1054 0.71 | Q V | | | | 2+45 0.1107 0.77 | Q V | | | | 2+50 0.1165 0.84 | Q V | | | | 2+55 0.1224 0.86 | Q V | | | | 3+ 0 0.1284 0.87 | Q V | | | | 3+ 5 0.1344 0.87 | Q V | | | | 3+10 0.1408 0.93 | Q V | | | | 3+15 0.1477 1.01 | Q V | | | | 3+20 0.1548 1.02 | Q V | | | | 3+25 0.1623 1.09 | Q V | | | | 3+30 0.1708 1.23 | Q V| | | | 3+35 0.1803 1.38 | Q V| | | | 3+40 0.1905 1.48 | Q V | | | 3+45 0.2013 1.57 | Q V | | | 3+50 0.2128 1.66 | Q |V | | | 3+55 0.2248 1.74 | Q |V | | | 4+ 0 0.2373 1.82 | Q | V | | | 4+ 5 0.2504 1.90 | Q | V | | | 4+10 0.2645 2.05 | Q | V | | | 4+15 0.2797 2.20 | Q | V | | | 4+20 0.2960 2.36 | Q| V | | | 4+25 0.3134 2.53 | Q V | | | 4+30 0.3315 2.63 | Q V | | | 4+35 0.3503 2.72 | Q V | | | 4+40 0.3700 2.87 | |Q V| | | 4+45 0.3909 3.03 | | Q V | | 4+50 0.4124 3.13 | | Q |V | | 4+55 0.4345 3.21 | | Q | V | | 5+ 0 0.4577 3.36 | | Q | V | | 5+ 5 0.4836 3.76 | | Q | V | | 5+10 0.5143 4.46 | | Q | V | | 5+15 0.5495 5.11 | | Q V| | 5+20 0.5883 5.64 | | | Q |V | 5+25 0.6316 6.28 | | | Q | V | 5+30 0.6818 7.29 | | | Q| V | 5+35 0.7223 5.87 | | | Q | V | 5+40 0.7408 2.69 | Q | | V| 5+45 0.7491 1.21 | Q | | | V| 5+50 0.7528 0.54 | Q | | | V| 5+55 0.7540 0.17 Q | | | V| 6+ 0 0.7545 0.07 Q | | | V| 6+ 5 0.7547 0.03 Q | | | V| 6+10 0.7548 0.01 Q | | | V| 6+15 0.7548 0.00 Q | | | V| 6+20 0.7548 0.00 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 449
Menifee Mayor and City Council
July 15, 2026
Page
1079 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10B2410.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.051 Hr.
Lag time = 3.04 Min.
25% of lag time = 0.76 Min.
40% of lag time = 1.22 Min.
Unit time = 5.00 Min.
Duration of storm = 24 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.60 13.42
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 4.00 33.56
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.600(In)
Area Averaged 100-Year Rainfall = 4.000(In)
Point rain (area averaged) = 2.587(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 2.587(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 450
Menifee Mayor and City Council
July 15, 2026
Page
1080 of 3153
8.390 93.00 0.000
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 164.477 36.504 3.087 2 0.167 328.955 45.930 3.884 3 0.250 493.432 10.407 0.880 4 0.333 657.909 4.440 0.375 5 0.417 822.386 2.719 0.230 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.07 0.021 ( 0.161) 0.019 0.002 2 0.17 0.07 0.021 ( 0.161) 0.019 0.002 3 0.25 0.07 0.021 ( 0.160) 0.019 0.002 4 0.33 0.10 0.031 ( 0.159) 0.028 0.003 5 0.42 0.10 0.031 ( 0.159) 0.028 0.003 6 0.50 0.10 0.031 ( 0.158) 0.028 0.003 7 0.58 0.10 0.031 ( 0.158) 0.028 0.003 8 0.67 0.10 0.031 ( 0.157) 0.028 0.003 9 0.75 0.10 0.031 ( 0.156) 0.028 0.003 10 0.83 0.13 0.041 ( 0.156) 0.037 0.004 11 0.92 0.13 0.041 ( 0.155) 0.037 0.004 12 1.00 0.13 0.041 ( 0.155) 0.037 0.004 13 1.08 0.10 0.031 ( 0.154) 0.028 0.003 14 1.17 0.10 0.031 ( 0.153) 0.028 0.003 15 1.25 0.10 0.031 ( 0.153) 0.028 0.003 16 1.33 0.10 0.031 ( 0.152) 0.028 0.003 17 1.42 0.10 0.031 ( 0.151) 0.028 0.003 18 1.50 0.10 0.031 ( 0.151) 0.028 0.003 19 1.58 0.10 0.031 ( 0.150) 0.028 0.003 20 1.67 0.10 0.031 ( 0.150) 0.028 0.003 21 1.75 0.10 0.031 ( 0.149) 0.028 0.003 22 1.83 0.13 0.041 ( 0.148) 0.037 0.004 23 1.92 0.13 0.041 ( 0.148) 0.037 0.004 24 2.00 0.13 0.041 ( 0.147) 0.037 0.004 25 2.08 0.13 0.041 ( 0.147) 0.037 0.004 26 2.17 0.13 0.041 ( 0.146) 0.037 0.004 27 2.25 0.13 0.041 ( 0.145) 0.037 0.004 28 2.33 0.13 0.041 ( 0.145) 0.037 0.004 29 2.42 0.13 0.041 ( 0.144) 0.037 0.004 30 2.50 0.13 0.041 ( 0.144) 0.037 0.004 31 2.58 0.17 0.052 ( 0.143) 0.047 0.005 32 2.67 0.17 0.052 ( 0.143) 0.047 0.005 33 2.75 0.17 0.052 ( 0.142) 0.047 0.005 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 451
Menifee Mayor and City Council
July 15, 2026
Page
1081 of 3153
34 2.83 0.17 0.052 ( 0.141) 0.047 0.005 35 2.92 0.17 0.052 ( 0.141) 0.047 0.005 36 3.00 0.17 0.052 ( 0.140) 0.047 0.005 37 3.08 0.17 0.052 ( 0.140) 0.047 0.005 38 3.17 0.17 0.052 ( 0.139) 0.047 0.005 39 3.25 0.17 0.052 ( 0.138) 0.047 0.005 40 3.33 0.17 0.052 ( 0.138) 0.047 0.005 41 3.42 0.17 0.052 ( 0.137) 0.047 0.005 42 3.50 0.17 0.052 ( 0.137) 0.047 0.005 43 3.58 0.17 0.052 ( 0.136) 0.047 0.005 44 3.67 0.17 0.052 ( 0.136) 0.047 0.005 45 3.75 0.17 0.052 ( 0.135) 0.047 0.005 46 3.83 0.20 0.062 ( 0.134) 0.056 0.006 47 3.92 0.20 0.062 ( 0.134) 0.056 0.006 48 4.00 0.20 0.062 ( 0.133) 0.056 0.006 49 4.08 0.20 0.062 ( 0.133) 0.056 0.006 50 4.17 0.20 0.062 ( 0.132) 0.056 0.006 51 4.25 0.20 0.062 ( 0.132) 0.056 0.006 52 4.33 0.23 0.072 ( 0.131) 0.065 0.007 53 4.42 0.23 0.072 ( 0.131) 0.065 0.007 54 4.50 0.23 0.072 ( 0.130) 0.065 0.007 55 4.58 0.23 0.072 ( 0.129) 0.065 0.007 56 4.67 0.23 0.072 ( 0.129) 0.065 0.007 57 4.75 0.23 0.072 ( 0.128) 0.065 0.007 58 4.83 0.27 0.083 ( 0.128) 0.075 0.008 59 4.92 0.27 0.083 ( 0.127) 0.075 0.008 60 5.00 0.27 0.083 ( 0.127) 0.075 0.008 61 5.08 0.20 0.062 ( 0.126) 0.056 0.006 62 5.17 0.20 0.062 ( 0.126) 0.056 0.006 63 5.25 0.20 0.062 ( 0.125) 0.056 0.006 64 5.33 0.23 0.072 ( 0.124) 0.065 0.007 65 5.42 0.23 0.072 ( 0.124) 0.065 0.007 66 5.50 0.23 0.072 ( 0.123) 0.065 0.007 67 5.58 0.27 0.083 ( 0.123) 0.075 0.008 68 5.67 0.27 0.083 ( 0.122) 0.075 0.008 69 5.75 0.27 0.083 ( 0.122) 0.075 0.008 70 5.83 0.27 0.083 ( 0.121) 0.075 0.008 71 5.92 0.27 0.083 ( 0.121) 0.075 0.008 72 6.00 0.27 0.083 ( 0.120) 0.075 0.008 73 6.08 0.30 0.093 ( 0.120) 0.084 0.009 74 6.17 0.30 0.093 ( 0.119) 0.084 0.009 75 6.25 0.30 0.093 ( 0.119) 0.084 0.009 76 6.33 0.30 0.093 ( 0.118) 0.084 0.009 77 6.42 0.30 0.093 ( 0.117) 0.084 0.009 78 6.50 0.30 0.093 ( 0.117) 0.084 0.009 79 6.58 0.33 0.103 ( 0.116) 0.093 0.010 80 6.67 0.33 0.103 ( 0.116) 0.093 0.010 81 6.75 0.33 0.103 ( 0.115) 0.093 0.010 82 6.83 0.33 0.103 ( 0.115) 0.093 0.010 83 6.92 0.33 0.103 ( 0.114) 0.093 0.010 84 7.00 0.33 0.103 ( 0.114) 0.093 0.010 85 7.08 0.33 0.103 ( 0.113) 0.093 0.010 86 7.17 0.33 0.103 ( 0.113) 0.093 0.010 87 7.25 0.33 0.103 ( 0.112) 0.093 0.010 88 7.33 0.37 0.114 ( 0.112) 0.102 0.011 89 7.42 0.37 0.114 ( 0.111) 0.102 0.011 90 7.50 0.37 0.114 ( 0.111) 0.102 0.011 91 7.58 0.40 0.124 0.110 ( 0.112) 0.014 92 7.67 0.40 0.124 0.110 ( 0.112) 0.014 93 7.75 0.40 0.124 0.109 ( 0.112) 0.015 94 7.83 0.43 0.135 0.109 ( 0.121) 0.026 95 7.92 0.43 0.135 0.108 ( 0.121) 0.026 96 8.00 0.43 0.135 0.108 ( 0.121) 0.027 97 8.08 0.50 0.155 0.107 ( 0.140) 0.048 98 8.17 0.50 0.155 0.107 ( 0.140) 0.049 99 8.25 0.50 0.155 0.106 ( 0.140) 0.049 100 8.33 0.50 0.155 0.106 ( 0.140) 0.050 101 8.42 0.50 0.155 0.105 ( 0.140) 0.050 102 8.50 0.50 0.155 0.105 ( 0.140) 0.051 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 452
Menifee Mayor and City Council
July 15, 2026
Page
1082 of 3153
103 8.58 0.53 0.166 0.104 ( 0.149) 0.061 104 8.67 0.53 0.166 0.104 ( 0.149) 0.062 105 8.75 0.53 0.166 0.103 ( 0.149) 0.062 106 8.83 0.57 0.176 0.103 ( 0.158) 0.073 107 8.92 0.57 0.176 0.102 ( 0.158) 0.074 108 9.00 0.57 0.176 0.102 ( 0.158) 0.074 109 9.08 0.63 0.197 0.101 ( 0.177) 0.095 110 9.17 0.63 0.197 0.101 ( 0.177) 0.096 111 9.25 0.63 0.197 0.100 ( 0.177) 0.096 112 9.33 0.67 0.207 0.100 ( 0.186) 0.107 113 9.42 0.67 0.207 0.099 ( 0.186) 0.108 114 9.50 0.67 0.207 0.099 ( 0.186) 0.108 115 9.58 0.70 0.217 0.098 ( 0.196) 0.119 116 9.67 0.70 0.217 0.098 ( 0.196) 0.119 117 9.75 0.70 0.217 0.097 ( 0.196) 0.120 118 9.83 0.73 0.228 0.097 ( 0.205) 0.131 119 9.92 0.73 0.228 0.097 ( 0.205) 0.131 120 10.00 0.73 0.228 0.096 ( 0.205) 0.132 121 10.08 0.50 0.155 0.096 ( 0.140) 0.060 122 10.17 0.50 0.155 0.095 ( 0.140) 0.060 123 10.25 0.50 0.155 0.095 ( 0.140) 0.061 124 10.33 0.50 0.155 0.094 ( 0.140) 0.061 125 10.42 0.50 0.155 0.094 ( 0.140) 0.061 126 10.50 0.50 0.155 0.093 ( 0.140) 0.062 127 10.58 0.67 0.207 0.093 ( 0.186) 0.114 128 10.67 0.67 0.207 0.092 ( 0.186) 0.115 129 10.75 0.67 0.207 0.092 ( 0.186) 0.115 130 10.83 0.67 0.207 0.092 ( 0.186) 0.115 131 10.92 0.67 0.207 0.091 ( 0.186) 0.116 132 11.00 0.67 0.207 0.091 ( 0.186) 0.116 133 11.08 0.63 0.197 0.090 ( 0.177) 0.106 134 11.17 0.63 0.197 0.090 ( 0.177) 0.107 135 11.25 0.63 0.197 0.089 ( 0.177) 0.107 136 11.33 0.63 0.197 0.089 ( 0.177) 0.108 137 11.42 0.63 0.197 0.088 ( 0.177) 0.108 138 11.50 0.63 0.197 0.088 ( 0.177) 0.109 139 11.58 0.57 0.176 0.088 ( 0.158) 0.088 140 11.67 0.57 0.176 0.087 ( 0.158) 0.089 141 11.75 0.57 0.176 0.087 ( 0.158) 0.089 142 11.83 0.60 0.186 0.086 ( 0.168) 0.100 143 11.92 0.60 0.186 0.086 ( 0.168) 0.100 144 12.00 0.60 0.186 0.085 ( 0.168) 0.101 145 12.08 0.83 0.259 0.085 ( 0.233) 0.174 146 12.17 0.83 0.259 0.085 ( 0.233) 0.174 147 12.25 0.83 0.259 0.084 ( 0.233) 0.175 148 12.33 0.87 0.269 0.084 ( 0.242) 0.185 149 12.42 0.87 0.269 0.083 ( 0.242) 0.186 150 12.50 0.87 0.269 0.083 ( 0.242) 0.186 151 12.58 0.93 0.290 0.082 ( 0.261) 0.207 152 12.67 0.93 0.290 0.082 ( 0.261) 0.208 153 12.75 0.93 0.290 0.082 ( 0.261) 0.208 154 12.83 0.97 0.300 0.081 ( 0.270) 0.219 155 12.92 0.97 0.300 0.081 ( 0.270) 0.219 156 13.00 0.97 0.300 0.080 ( 0.270) 0.220 157 13.08 1.13 0.352 0.080 ( 0.317) 0.272 158 13.17 1.13 0.352 0.080 ( 0.317) 0.272 159 13.25 1.13 0.352 0.079 ( 0.317) 0.273 160 13.33 1.13 0.352 0.079 ( 0.317) 0.273 161 13.42 1.13 0.352 0.078 ( 0.317) 0.274 162 13.50 1.13 0.352 0.078 ( 0.317) 0.274 163 13.58 0.77 0.238 0.078 ( 0.214) 0.160 164 13.67 0.77 0.238 0.077 ( 0.214) 0.161 165 13.75 0.77 0.238 0.077 ( 0.214) 0.161 166 13.83 0.77 0.238 0.076 ( 0.214) 0.162 167 13.92 0.77 0.238 0.076 ( 0.214) 0.162 168 14.00 0.77 0.238 0.076 ( 0.214) 0.162 169 14.08 0.90 0.279 0.075 ( 0.251) 0.204 170 14.17 0.90 0.279 0.075 ( 0.251) 0.205 171 14.25 0.90 0.279 0.074 ( 0.251) 0.205 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 453
Menifee Mayor and City Council
July 15, 2026
Page
1083 of 3153
172 14.33 0.87 0.269 0.074 ( 0.242) 0.195 173 14.42 0.87 0.269 0.074 ( 0.242) 0.195 174 14.50 0.87 0.269 0.073 ( 0.242) 0.196 175 14.58 0.87 0.269 0.073 ( 0.242) 0.196 176 14.67 0.87 0.269 0.073 ( 0.242) 0.197 177 14.75 0.87 0.269 0.072 ( 0.242) 0.197 178 14.83 0.83 0.259 0.072 ( 0.233) 0.187 179 14.92 0.83 0.259 0.071 ( 0.233) 0.187 180 15.00 0.83 0.259 0.071 ( 0.233) 0.188 181 15.08 0.80 0.248 0.071 ( 0.224) 0.178 182 15.17 0.80 0.248 0.070 ( 0.224) 0.178 183 15.25 0.80 0.248 0.070 ( 0.224) 0.178 184 15.33 0.77 0.238 0.070 ( 0.214) 0.168 185 15.42 0.77 0.238 0.069 ( 0.214) 0.169 186 15.50 0.77 0.238 0.069 ( 0.214) 0.169 187 15.58 0.63 0.197 0.069 ( 0.177) 0.128 188 15.67 0.63 0.197 0.068 ( 0.177) 0.128 189 15.75 0.63 0.197 0.068 ( 0.177) 0.129 190 15.83 0.63 0.197 0.068 ( 0.177) 0.129 191 15.92 0.63 0.197 0.067 ( 0.177) 0.129 192 16.00 0.63 0.197 0.067 ( 0.177) 0.130 193 16.08 0.13 0.041 ( 0.066) 0.037 0.004 194 16.17 0.13 0.041 ( 0.066) 0.037 0.004 195 16.25 0.13 0.041 ( 0.066) 0.037 0.004 196 16.33 0.13 0.041 ( 0.065) 0.037 0.004 197 16.42 0.13 0.041 ( 0.065) 0.037 0.004 198 16.50 0.13 0.041 ( 0.065) 0.037 0.004 199 16.58 0.10 0.031 ( 0.064) 0.028 0.003 200 16.67 0.10 0.031 ( 0.064) 0.028 0.003 201 16.75 0.10 0.031 ( 0.064) 0.028 0.003 202 16.83 0.10 0.031 ( 0.063) 0.028 0.003 203 16.92 0.10 0.031 ( 0.063) 0.028 0.003 204 17.00 0.10 0.031 ( 0.063) 0.028 0.003 205 17.08 0.17 0.052 ( 0.063) 0.047 0.005 206 17.17 0.17 0.052 ( 0.062) 0.047 0.005 207 17.25 0.17 0.052 ( 0.062) 0.047 0.005 208 17.33 0.17 0.052 ( 0.062) 0.047 0.005 209 17.42 0.17 0.052 ( 0.061) 0.047 0.005 210 17.50 0.17 0.052 ( 0.061) 0.047 0.005 211 17.58 0.17 0.052 ( 0.061) 0.047 0.005 212 17.67 0.17 0.052 ( 0.060) 0.047 0.005 213 17.75 0.17 0.052 ( 0.060) 0.047 0.005 214 17.83 0.13 0.041 ( 0.060) 0.037 0.004 215 17.92 0.13 0.041 ( 0.059) 0.037 0.004 216 18.00 0.13 0.041 ( 0.059) 0.037 0.004 217 18.08 0.13 0.041 ( 0.059) 0.037 0.004 218 18.17 0.13 0.041 ( 0.059) 0.037 0.004 219 18.25 0.13 0.041 ( 0.058) 0.037 0.004 220 18.33 0.13 0.041 ( 0.058) 0.037 0.004 221 18.42 0.13 0.041 ( 0.058) 0.037 0.004 222 18.50 0.13 0.041 ( 0.057) 0.037 0.004 223 18.58 0.10 0.031 ( 0.057) 0.028 0.003 224 18.67 0.10 0.031 ( 0.057) 0.028 0.003 225 18.75 0.10 0.031 ( 0.057) 0.028 0.003 226 18.83 0.07 0.021 ( 0.056) 0.019 0.002 227 18.92 0.07 0.021 ( 0.056) 0.019 0.002 228 19.00 0.07 0.021 ( 0.056) 0.019 0.002 229 19.08 0.10 0.031 ( 0.056) 0.028 0.003 230 19.17 0.10 0.031 ( 0.055) 0.028 0.003 231 19.25 0.10 0.031 ( 0.055) 0.028 0.003 232 19.33 0.13 0.041 ( 0.055) 0.037 0.004 233 19.42 0.13 0.041 ( 0.055) 0.037 0.004 234 19.50 0.13 0.041 ( 0.054) 0.037 0.004 235 19.58 0.10 0.031 ( 0.054) 0.028 0.003 236 19.67 0.10 0.031 ( 0.054) 0.028 0.003 237 19.75 0.10 0.031 ( 0.054) 0.028 0.003 238 19.83 0.07 0.021 ( 0.053) 0.019 0.002 239 19.92 0.07 0.021 ( 0.053) 0.019 0.002 240 20.00 0.07 0.021 ( 0.053) 0.019 0.002 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 454
Menifee Mayor and City Council
July 15, 2026
Page
1084 of 3153
241 20.08 0.10 0.031 ( 0.053) 0.028 0.003 242 20.17 0.10 0.031 ( 0.052) 0.028 0.003 243 20.25 0.10 0.031 ( 0.052) 0.028 0.003 244 20.33 0.10 0.031 ( 0.052) 0.028 0.003 245 20.42 0.10 0.031 ( 0.052) 0.028 0.003 246 20.50 0.10 0.031 ( 0.051) 0.028 0.003 247 20.58 0.10 0.031 ( 0.051) 0.028 0.003 248 20.67 0.10 0.031 ( 0.051) 0.028 0.003 249 20.75 0.10 0.031 ( 0.051) 0.028 0.003 250 20.83 0.07 0.021 ( 0.051) 0.019 0.002 251 20.92 0.07 0.021 ( 0.050) 0.019 0.002 252 21.00 0.07 0.021 ( 0.050) 0.019 0.002 253 21.08 0.10 0.031 ( 0.050) 0.028 0.003 254 21.17 0.10 0.031 ( 0.050) 0.028 0.003 255 21.25 0.10 0.031 ( 0.050) 0.028 0.003 256 21.33 0.07 0.021 ( 0.049) 0.019 0.002 257 21.42 0.07 0.021 ( 0.049) 0.019 0.002 258 21.50 0.07 0.021 ( 0.049) 0.019 0.002 259 21.58 0.10 0.031 ( 0.049) 0.028 0.003 260 21.67 0.10 0.031 ( 0.049) 0.028 0.003 261 21.75 0.10 0.031 ( 0.049) 0.028 0.003 262 21.83 0.07 0.021 ( 0.048) 0.019 0.002 263 21.92 0.07 0.021 ( 0.048) 0.019 0.002 264 22.00 0.07 0.021 ( 0.048) 0.019 0.002 265 22.08 0.10 0.031 ( 0.048) 0.028 0.003 266 22.17 0.10 0.031 ( 0.048) 0.028 0.003 267 22.25 0.10 0.031 ( 0.048) 0.028 0.003 268 22.33 0.07 0.021 ( 0.047) 0.019 0.002 269 22.42 0.07 0.021 ( 0.047) 0.019 0.002 270 22.50 0.07 0.021 ( 0.047) 0.019 0.002 271 22.58 0.07 0.021 ( 0.047) 0.019 0.002 272 22.67 0.07 0.021 ( 0.047) 0.019 0.002 273 22.75 0.07 0.021 ( 0.047) 0.019 0.002 274 22.83 0.07 0.021 ( 0.047) 0.019 0.002 275 22.92 0.07 0.021 ( 0.047) 0.019 0.002 276 23.00 0.07 0.021 ( 0.046) 0.019 0.002 277 23.08 0.07 0.021 ( 0.046) 0.019 0.002 278 23.17 0.07 0.021 ( 0.046) 0.019 0.002 279 23.25 0.07 0.021 ( 0.046) 0.019 0.002 280 23.33 0.07 0.021 ( 0.046) 0.019 0.002 281 23.42 0.07 0.021 ( 0.046) 0.019 0.002 282 23.50 0.07 0.021 ( 0.046) 0.019 0.002 283 23.58 0.07 0.021 ( 0.046) 0.019 0.002 284 23.67 0.07 0.021 ( 0.046) 0.019 0.002 285 23.75 0.07 0.021 ( 0.046) 0.019 0.002 286 23.83 0.07 0.021 ( 0.046) 0.019 0.002 287 23.92 0.07 0.021 ( 0.046) 0.019 0.002 288 24.00 0.07 0.021 ( 0.046) 0.019 0.002 (Loss Rate Not Used)
Sum = 100.0 Sum = 14.4 Flood volume = Effective rainfall 1.20(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 0.8(Ac.Ft) Total soil loss = 1.38(In)
Total soil loss = 0.967(Ac.Ft)
Total rainfall = 2.59(In)
Flood volume = 36664.5 Cubic Feet
Total soil loss = 42134.7 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 2.314(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 455
Menifee Mayor and City Council
July 15, 2026
Page
1085 of 3153
0+ 5 0.0000 0.01 Q | | | | 0+10 0.0001 0.01 Q | | | | 0+15 0.0003 0.02 Q | | | | 0+20 0.0004 0.02 Q | | | | 0+25 0.0006 0.02 Q | | | | 0+30 0.0007 0.03 Q | | | | 0+35 0.0009 0.03 Q | | | | 0+40 0.0011 0.03 Q | | | | 0+45 0.0013 0.03 Q | | | | 0+50 0.0015 0.03 Q | | | | 0+55 0.0017 0.03 Q | | | | 1+ 0 0.0020 0.03 Q | | | | 1+ 5 0.0022 0.03 Q | | | | 1+10 0.0024 0.03 Q | | | | 1+15 0.0025 0.03 Q | | | | 1+20 0.0027 0.03 Q | | | | 1+25 0.0029 0.03 Q | | | | 1+30 0.0031 0.03 Q | | | | 1+35 0.0033 0.03 Q | | | | 1+40 0.0035 0.03 Q | | | | 1+45 0.0036 0.03 Q | | | | 1+50 0.0038 0.03 Q | | | | 1+55 0.0041 0.03 Q | | | | 2+ 0 0.0043 0.03 Q | | | | 2+ 5 0.0045 0.03 Q | | | | 2+10 0.0048 0.04 Q | | | | 2+15 0.0050 0.04 Q | | | | 2+20 0.0053 0.04 Q | | | | 2+25 0.0055 0.04 Q | | | | 2+30 0.0058 0.04 Q | | | | 2+35 0.0060 0.04 Q | | | | 2+40 0.0063 0.04 Q | | | | 2+45 0.0066 0.04 Q | | | | 2+50 0.0069 0.04 Q | | | | 2+55 0.0072 0.04 Q | | | | 3+ 0 0.0075 0.04 Q | | | | 3+ 5 0.0078 0.04 Q | | | | 3+10 0.0081 0.04 Q | | | | 3+15 0.0084 0.04 Q | | | | 3+20 0.0087 0.04 Q | | | | 3+25 0.0090 0.04 Q | | | | 3+30 0.0093 0.04 Q | | | | 3+35 0.0096 0.04 Q | | | | 3+40 0.0099 0.04 Q | | | | 3+45 0.0102 0.04 Q | | | | 3+50 0.0105 0.05 Q | | | | 3+55 0.0109 0.05 Q | | | | 4+ 0 0.0113 0.05 Q | | | | 4+ 5 0.0116 0.05 Q | | | | 4+10 0.0120 0.05 Q | | | | 4+15 0.0123 0.05 Q | | | | 4+20 0.0127 0.06 Q | | | | 4+25 0.0131 0.06 Q | | | | 4+30 0.0135 0.06 Q | | | | 4+35 0.0140 0.06 Q | | | | 4+40 0.0144 0.06 Q | | | | 4+45 0.0148 0.06 Q | | | | 4+50 0.0153 0.06 Q | | | | 4+55 0.0157 0.07 Q | | | | 5+ 0 0.0162 0.07 Q | | | | 5+ 5 0.0166 0.06 Q | | | | 5+10 0.0170 0.06 Q | | | | 5+15 0.0174 0.05 Q | | | | 5+20 0.0178 0.06 Q | | | | 5+25 0.0182 0.06 Q | | | | 5+30 0.0186 0.06 Q | | | | 5+35 0.0191 0.06 Q | | | | 5+40 0.0195 0.07 Q | | | | 5+45 0.0200 0.07 Q | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 456
Menifee Mayor and City Council
July 15, 2026
Page
1086 of 3153
5+50 0.0205 0.07 Q | | | | 5+55 0.0210 0.07 Q | | | | 6+ 0 0.0214 0.07 QV | | | | 6+ 5 0.0220 0.07 QV | | | | 6+10 0.0225 0.08 QV | | | | 6+15 0.0230 0.08 QV | | | | 6+20 0.0236 0.08 QV | | | | 6+25 0.0241 0.08 QV | | | | 6+30 0.0247 0.08 QV | | | | 6+35 0.0252 0.08 QV | | | | 6+40 0.0258 0.09 QV | | | | 6+45 0.0264 0.09 QV | | | | 6+50 0.0270 0.09 QV | | | | 6+55 0.0276 0.09 QV | | | | 7+ 0 0.0282 0.09 QV | | | | 7+ 5 0.0288 0.09 QV | | | | 7+10 0.0294 0.09 QV | | | | 7+15 0.0300 0.09 QV | | | | 7+20 0.0306 0.09 QV | | | | 7+25 0.0313 0.09 QV | | | | 7+30 0.0320 0.10 QV | | | | 7+35 0.0327 0.10 QV | | | | 7+40 0.0335 0.12 QV | | | | 7+45 0.0343 0.12 QV | | | | 7+50 0.0354 0.16 QV | | | | 7+55 0.0368 0.20 QV | | | | 8+ 0 0.0383 0.22 QV | | | | 8+ 5 0.0403 0.29 |Q | | | | 8+10 0.0429 0.38 |QV | | | | 8+15 0.0456 0.40 |QV | | | | 8+20 0.0485 0.41 |QV | | | | 8+25 0.0513 0.42 |QV | | | | 8+30 0.0543 0.42 |QV | | | | 8+35 0.0574 0.46 |QV | | | | 8+40 0.0609 0.50 | Q | | | | 8+45 0.0645 0.52 | QV | | | | 8+50 0.0683 0.56 | QV | | | | 8+55 0.0725 0.60 | QV | | | | 9+ 0 0.0767 0.62 | QV | | | | 9+ 5 0.0815 0.69 | QV | | | | 9+10 0.0868 0.78 | QV | | | | 9+15 0.0923 0.80 | QV | | | | 9+20 0.0981 0.84 | QV | | | | 9+25 0.1042 0.89 | QV | | | | 9+30 0.1105 0.90 | Q V | | | | 9+35 0.1170 0.94 | Q V | | | | 9+40 0.1238 0.99 | Q V | | | | 9+45 0.1307 1.00 | Q V | | | | 9+50 0.1379 1.04 | Q V | | | | 9+55 0.1454 1.09 | Q V | | | | 10+ 0 0.1530 1.10 | Q V | | | | 10+ 5 0.1591 0.89 | Q V | | | | 10+10 0.1633 0.61 | Q V | | | | 10+15 0.1671 0.55 | Q V | | | | 10+20 0.1708 0.53 | Q V | | | | 10+25 0.1743 0.52 | Q V | | | | 10+30 0.1779 0.52 | Q V | | | | 10+35 0.1826 0.68 | Q V | | | | 10+40 0.1888 0.89 | Q V | | | | 10+45 0.1952 0.94 | Q V| | | | 10+50 0.2018 0.96 | Q V| | | | 10+55 0.2086 0.98 | Q V| | | | 11+ 0 0.2153 0.98 | Q V | | | 11+ 5 0.2219 0.95 | Q V | | | 11+10 0.2282 0.92 | Q V | | | 11+15 0.2345 0.91 | Q |V | | | 11+20 0.2407 0.91 | Q |V | | | 11+25 0.2470 0.91 | Q |V | | | 11+30 0.2533 0.92 | Q | V | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 457
Menifee Mayor and City Council
July 15, 2026
Page
1087 of 3153
11+35 0.2592 0.86 | Q | V | | | 11+40 0.2646 0.78 | Q | V | | | 11+45 0.2699 0.76 | Q | V | | | 11+50 0.2753 0.79 | Q | V | | | 11+55 0.2810 0.83 | Q | V | | | 12+ 0 0.2869 0.84 | Q | V | | | 12+ 5 0.2943 1.08 | Q | V | | | 12+10 0.3036 1.36 | Q | V | | | 12+15 0.3135 1.43 | Q | V | | | 12+20 0.3238 1.49 | Q | V | | | 12+25 0.3345 1.55 | Q | V | | | 12+30 0.3453 1.57 | Q | V | | | 12+35 0.3565 1.64 | Q | V | | | 12+40 0.3684 1.72 | Q | V | | | 12+45 0.3804 1.75 | Q | V | | | 12+50 0.3928 1.79 | Q | V | | | 12+55 0.4054 1.84 | Q | V| | | 13+ 0 0.4182 1.85 | Q | V| | | 13+ 5 0.4320 2.02 | Q | V | | 13+10 0.4474 2.22 | Q | |V | | 13+15 0.4630 2.27 | Q| | V | | 13+20 0.4788 2.30 | Q| | V | | 13+25 0.4947 2.31 | Q| | V | | 13+30 0.5107 2.31 | Q| | V | | 13+35 0.5242 1.97 | Q | | V | | 13+40 0.5347 1.53 | Q | | V | | 13+45 0.5446 1.43 | Q | | V | | 13+50 0.5542 1.39 | Q | | V | | 13+55 0.5636 1.37 | Q | | V | | 14+ 0 0.5730 1.37 | Q | | V | | 14+ 5 0.5834 1.50 | Q | | V | | 14+10 0.5949 1.67 | Q | | V | | 14+15 0.6066 1.71 | Q | | V | | 14+20 0.6183 1.69 | Q | | V| | 14+25 0.6297 1.67 | Q | | V| | 14+30 0.6412 1.66 | Q | | V | 14+35 0.6526 1.66 | Q | | |V | 14+40 0.6640 1.66 | Q | | |V | 14+45 0.6755 1.66 | Q | | | V | 14+50 0.6867 1.63 | Q | | | V | 14+55 0.6977 1.60 | Q | | | V | 15+ 0 0.7087 1.59 | Q | | | V | 15+ 5 0.7194 1.56 | Q | | | V | 15+10 0.7299 1.52 | Q | | | V | 15+15 0.7403 1.51 | Q | | | V | 15+20 0.7505 1.48 | Q | | | V | 15+25 0.7604 1.44 | Q | | | V | 15+30 0.7703 1.43 | Q | | | V | 15+35 0.7793 1.31 | Q | | | V | 15+40 0.7872 1.15 | Q | | | V | 15+45 0.7948 1.11 | Q | | | V | 15+50 0.8024 1.10 | Q | | | V | 15+55 0.8099 1.09 | Q | | | V | 16+ 0 0.8175 1.10 | Q | | | V | 16+ 5 0.8223 0.71 | Q | | | V| 16+10 0.8239 0.22 Q | | | V| 16+15 0.8246 0.11 Q | | | V| 16+20 0.8251 0.06 Q | | | V| 16+25 0.8253 0.04 Q | | | V| 16+30 0.8256 0.04 Q | | | V| 16+35 0.8258 0.03 Q | | | V| 16+40 0.8260 0.03 Q | | | V| 16+45 0.8262 0.03 Q | | | V| 16+50 0.8263 0.03 Q | | | V| 16+55 0.8265 0.03 Q | | | V| 17+ 0 0.8267 0.03 Q | | | V| 17+ 5 0.8269 0.03 Q | | | V| 17+10 0.8272 0.04 Q | | | V| 17+15 0.8275 0.04 Q | | | V| Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 458
Menifee Mayor and City Council
July 15, 2026
Page
1088 of 3153
17+20 0.8278 0.04 Q | | | V| 17+25 0.8281 0.04 Q | | | V| 17+30 0.8284 0.04 Q | | | V| 17+35 0.8287 0.04 Q | | | V| 17+40 0.8290 0.04 Q | | | V| 17+45 0.8293 0.04 Q | | | V| 17+50 0.8296 0.04 Q | | | V| 17+55 0.8298 0.04 Q | | | V| 18+ 0 0.8301 0.04 Q | | | V| 18+ 5 0.8303 0.04 Q | | | V| 18+10 0.8306 0.04 Q | | | V| 18+15 0.8308 0.04 Q | | | V| 18+20 0.8310 0.04 Q | | | V| 18+25 0.8313 0.04 Q | | | V| 18+30 0.8315 0.04 Q | | | V| 18+35 0.8318 0.03 Q | | | V| 18+40 0.8319 0.03 Q | | | V| 18+45 0.8321 0.03 Q | | | V| 18+50 0.8323 0.02 Q | | | V| 18+55 0.8324 0.02 Q | | | V| 19+ 0 0.8325 0.02 Q | | | V| 19+ 5 0.8327 0.02 Q | | | V| 19+10 0.8329 0.02 Q | | | V| 19+15 0.8330 0.03 Q | | | V| 19+20 0.8332 0.03 Q | | | V| 19+25 0.8335 0.03 Q | | | V| 19+30 0.8337 0.03 Q | | | V| 19+35 0.8339 0.03 Q | | | V| 19+40 0.8341 0.03 Q | | | V| 19+45 0.8343 0.03 Q | | | V| 19+50 0.8345 0.02 Q | | | V| 19+55 0.8346 0.02 Q | | | V| 20+ 0 0.8347 0.02 Q | | | V| 20+ 5 0.8349 0.02 Q | | | V| 20+10 0.8350 0.02 Q | | | V| 20+15 0.8352 0.03 Q | | | V| 20+20 0.8354 0.03 Q | | | V| 20+25 0.8356 0.03 Q | | | V| 20+30 0.8357 0.03 Q | | | V| 20+35 0.8359 0.03 Q | | | V| 20+40 0.8361 0.03 Q | | | V| 20+45 0.8363 0.03 Q | | | V| 20+50 0.8364 0.02 Q | | | V| 20+55 0.8366 0.02 Q | | | V| 21+ 0 0.8367 0.02 Q | | | V| 21+ 5 0.8368 0.02 Q | | | V| 21+10 0.8370 0.02 Q | | | V| 21+15 0.8372 0.03 Q | | | V| 21+20 0.8374 0.02 Q | | | V| 21+25 0.8375 0.02 Q | | | V| 21+30 0.8376 0.02 Q | | | V| 21+35 0.8378 0.02 Q | | | V| 21+40 0.8379 0.02 Q | | | V| 21+45 0.8381 0.03 Q | | | V| 21+50 0.8383 0.02 Q | | | V| 21+55 0.8384 0.02 Q | | | V| 22+ 0 0.8385 0.02 Q | | | V| 22+ 5 0.8387 0.02 Q | | | V| 22+10 0.8388 0.02 Q | | | V| 22+15 0.8390 0.03 Q | | | V| 22+20 0.8392 0.02 Q | | | V| 22+25 0.8393 0.02 Q | | | V| 22+30 0.8394 0.02 Q | | | V| 22+35 0.8395 0.02 Q | | | V| 22+40 0.8397 0.02 Q | | | V| 22+45 0.8398 0.02 Q | | | V| 22+50 0.8399 0.02 Q | | | V| 22+55 0.8400 0.02 Q | | | V| 23+ 0 0.8401 0.02 Q | | | V| Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 459
Menifee Mayor and City Council
July 15, 2026
Page
1089 of 3153
23+ 5 0.8403 0.02 Q | | | V| 23+10 0.8404 0.02 Q | | | V| 23+15 0.8405 0.02 Q | | | V| 23+20 0.8406 0.02 Q | | | V| 23+25 0.8407 0.02 Q | | | V| 23+30 0.8409 0.02 Q | | | V| 23+35 0.8410 0.02 Q | | | V| 23+40 0.8411 0.02 Q | | | V| 23+45 0.8412 0.02 Q | | | V| 23+50 0.8413 0.02 Q | | | V| 23+55 0.8415 0.02 Q | | | V| 24+ 0 0.8416 0.02 Q | | | V| 24+ 5 0.8417 0.01 Q | | | V| 24+10 0.8417 0.00 Q | | | V| 24+15 0.8417 0.00 Q | | | V| 24+20 0.8417 0.00 Q | | | V| ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 460
Menifee Mayor and City Council
July 15, 2026
Page
1090 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10B110.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.019 Hr.
Lag time = 1.14 Min.
25% of lag time = 0.28 Min.
40% of lag time = 0.46 Min.
Unit time = 5.00 Min.
Duration of storm = 1 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 0.45 3.78
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.20 10.07
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.450(In)
Area Averaged 100-Year Rainfall = 1.200(In)
Point rain (area averaged) = 0.759(In)
Areal adjustment factor = 99.99 %
Adjusted average point rain = 0.758(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 461
Menifee Mayor and City Council
July 15, 2026
Page
1091 of 3153
8.390 75.00 0.900
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- Slope of intensity-duration curve for a 1 hour storm =0.5000 ---------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 438.606 67.570 5.713 2 0.167 877.212 32.430 2.742 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 4.20 0.382 ( 0.058) 0.038 0.344 2 0.17 4.30 0.391 ( 0.058) 0.039 0.352 3 0.25 5.00 0.455 ( 0.058) 0.046 0.410 4 0.33 5.00 0.455 ( 0.058) 0.046 0.410 5 0.42 5.80 0.528 ( 0.058) 0.053 0.475 6 0.50 6.50 0.592 0.058 ( 0.059) 0.534 7 0.58 7.40 0.674 0.058 ( 0.067) 0.616 8 0.67 8.60 0.783 0.058 ( 0.078) 0.725 9 0.75 12.30 1.120 0.058 ( 0.112) 1.062 10 0.83 29.10 2.649 0.058 ( 0.265) 2.591 11 0.92 6.80 0.619 0.058 ( 0.062) 0.561 12 1.00 5.00 0.455 ( 0.058) 0.046 0.410 (Loss Rate Not Used)
Sum = 100.0 Sum = 8.5 Flood volume = Effective rainfall 0.71(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 0.5(Ac.Ft) Total soil loss = 0.05(In)
Total soil loss = 0.036(Ac.Ft)
Total rainfall = 0.76(In)
Flood volume = 21547.1 Cubic Feet
Total soil loss = 1553.5 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 17.725(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 5.0 10.0 15.0 20.0 ----------------------------------------------------------------------- 0+ 5 0.0135 1.97 |V Q | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 462
Menifee Mayor and City Council
July 15, 2026
Page
1092 of 3153
0+10 0.0339 2.96 | V Q | | | | 0+15 0.0567 3.31 | V Q | | | | 0+20 0.0806 3.47 | Q | | | | 0+25 0.1070 3.84 | QV | | | | 0+30 0.1370 4.36 | Q |V | | | 0+35 0.1713 4.99 | Q| V | | | 0+40 0.2115 5.84 | |Q V | | | 0+45 0.2670 8.06 | | Q |V | | 0+50 0.3891 17.73 | | | |V Q | 0+55 0.4602 10.32 | | Q | V | 1+ 0 0.4869 3.88 | Q | | | V| 1+ 5 0.4947 1.12 | Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 463
Menifee Mayor and City Council
July 15, 2026
Page
1093 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10B310.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.019 Hr.
Lag time = 1.14 Min.
25% of lag time = 0.28 Min.
40% of lag time = 0.46 Min.
Unit time = 5.00 Min.
Duration of storm = 3 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 0.80 6.71
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.80 15.10
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.800(In)
Area Averaged 100-Year Rainfall = 1.800(In)
Point rain (area averaged) = 1.211(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.211(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 464
Menifee Mayor and City Council
July 15, 2026
Page
1094 of 3153
8.390 75.00 0.900
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 438.606 67.570 5.713 2 0.167 877.212 32.430 2.742 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 1.30 0.189 ( 0.058) 0.019 0.170 2 0.17 1.30 0.189 ( 0.058) 0.019 0.170 3 0.25 1.10 0.160 ( 0.058) 0.016 0.144 4 0.33 1.50 0.218 ( 0.058) 0.022 0.196 5 0.42 1.50 0.218 ( 0.058) 0.022 0.196 6 0.50 1.80 0.262 ( 0.058) 0.026 0.235 7 0.58 1.50 0.218 ( 0.058) 0.022 0.196 8 0.67 1.80 0.262 ( 0.058) 0.026 0.235 9 0.75 1.80 0.262 ( 0.058) 0.026 0.235 10 0.83 1.50 0.218 ( 0.058) 0.022 0.196 11 0.92 1.60 0.233 ( 0.058) 0.023 0.209 12 1.00 1.80 0.262 ( 0.058) 0.026 0.235 13 1.08 2.20 0.320 ( 0.058) 0.032 0.288 14 1.17 2.20 0.320 ( 0.058) 0.032 0.288 15 1.25 2.20 0.320 ( 0.058) 0.032 0.288 16 1.33 2.00 0.291 ( 0.058) 0.029 0.262 17 1.42 2.60 0.378 ( 0.058) 0.038 0.340 18 1.50 2.70 0.392 ( 0.058) 0.039 0.353 19 1.58 2.40 0.349 ( 0.058) 0.035 0.314 20 1.67 2.70 0.392 ( 0.058) 0.039 0.353 21 1.75 3.30 0.480 ( 0.058) 0.048 0.432 22 1.83 3.10 0.451 ( 0.058) 0.045 0.406 23 1.92 2.90 0.422 ( 0.058) 0.042 0.379 24 2.00 3.00 0.436 ( 0.058) 0.044 0.392 25 2.08 3.10 0.451 ( 0.058) 0.045 0.406 26 2.17 4.20 0.611 0.058 ( 0.061) 0.553 27 2.25 5.00 0.727 0.058 ( 0.073) 0.669 28 2.33 3.50 0.509 ( 0.058) 0.051 0.458 29 2.42 6.80 0.988 0.058 ( 0.099) 0.931 30 2.50 7.30 1.061 0.058 ( 0.106) 1.004 31 2.58 8.20 1.192 0.058 ( 0.119) 1.134 32 2.67 5.90 0.858 0.058 ( 0.086) 0.800 33 2.75 2.00 0.291 ( 0.058) 0.029 0.262 34 2.83 1.80 0.262 ( 0.058) 0.026 0.235 35 2.92 1.80 0.262 ( 0.058) 0.026 0.235 36 3.00 0.60 0.087 ( 0.058) 0.009 0.078 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 465
Menifee Mayor and City Council
July 15, 2026
Page
1095 of 3153
(Loss Rate Not Used)
Sum = 100.0 Sum = 13.3 Flood volume = Effective rainfall 1.11(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 0.8(Ac.Ft) Total soil loss = 0.10(In)
Total soil loss = 0.073(Ac.Ft)
Total rainfall = 1.21(In)
Flood volume = 33706.8 Cubic Feet
Total soil loss = 3186.2 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 9.238(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0067 0.97 V Q | | | | 0+10 0.0166 1.44 V Q | | | | 0+15 0.0255 1.29 |V Q | | | | 0+20 0.0359 1.52 |V Q | | | | 0+25 0.0474 1.66 | V Q | | | | 0+30 0.0603 1.88 | V Q | | | | 0+35 0.0725 1.77 | V Q | | | | 0+40 0.0855 1.88 | V Q | | | | 0+45 0.0992 1.99 | V Q | | | | 0+50 0.1114 1.77 | V Q | | | | 0+55 0.1233 1.73 | Q | | | | 1+ 0 0.1366 1.92 | Q | | | | 1+ 5 0.1523 2.29 | V Q| | | | 1+10 0.1691 2.43 | VQ| | | | 1+15 0.1859 2.43 | Q| | | | 1+20 0.2016 2.29 | QV | | | 1+25 0.2200 2.66 | QV | | | 1+30 0.2403 2.95 | |QV | | | 1+35 0.2593 2.76 | |Q V | | | 1+40 0.2792 2.88 | |Q V | | | 1+45 0.3028 3.44 | | Q V | | | 1+50 0.3270 3.50 | | Q V | | | 1+55 0.3496 3.28 | | Q V | | | 2+ 0 0.3722 3.28 | | Q V| | | 2+ 5 0.3956 3.40 | | Q V | | 2+10 0.4250 4.27 | | Q |V | | 2+15 0.4618 5.34 | | |Q V | | 2+20 0.4925 4.45 | | Q | V | | 2+25 0.5378 6.58 | | | QV | | 2+30 0.5949 8.29 | | | V Q | 2+35 0.6585 9.24 | | | | V Q | 2+40 0.7114 7.69 | | | Q V | 2+45 0.7368 3.69 | | Q | | V | 2+50 0.7511 2.06 | Q | | | V | 2+55 0.7648 1.99 | Q | | | V| 3+ 0 0.7723 1.09 | Q | | | V| 3+ 5 0.7738 0.22 Q | | | V| ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 466
Menifee Mayor and City Council
July 15, 2026
Page
1096 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10B610.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.019 Hr.
Lag time = 1.14 Min.
25% of lag time = 0.28 Min.
40% of lag time = 0.46 Min.
Unit time = 5.00 Min.
Duration of storm = 6 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.00 8.39
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 2.50 20.98
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.000(In)
Area Averaged 100-Year Rainfall = 2.500(In)
Point rain (area averaged) = 1.617(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.617(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 467
Menifee Mayor and City Council
July 15, 2026
Page
1097 of 3153
8.390 75.00 0.900
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 438.606 67.570 5.713 2 0.167 877.212 32.430 2.742 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.50 0.097 ( 0.058) 0.010 0.087 2 0.17 0.60 0.116 ( 0.058) 0.012 0.105 3 0.25 0.60 0.116 ( 0.058) 0.012 0.105 4 0.33 0.60 0.116 ( 0.058) 0.012 0.105 5 0.42 0.60 0.116 ( 0.058) 0.012 0.105 6 0.50 0.70 0.136 ( 0.058) 0.014 0.122 7 0.58 0.70 0.136 ( 0.058) 0.014 0.122 8 0.67 0.70 0.136 ( 0.058) 0.014 0.122 9 0.75 0.70 0.136 ( 0.058) 0.014 0.122 10 0.83 0.70 0.136 ( 0.058) 0.014 0.122 11 0.92 0.70 0.136 ( 0.058) 0.014 0.122 12 1.00 0.80 0.155 ( 0.058) 0.016 0.140 13 1.08 0.80 0.155 ( 0.058) 0.016 0.140 14 1.17 0.80 0.155 ( 0.058) 0.016 0.140 15 1.25 0.80 0.155 ( 0.058) 0.016 0.140 16 1.33 0.80 0.155 ( 0.058) 0.016 0.140 17 1.42 0.80 0.155 ( 0.058) 0.016 0.140 18 1.50 0.80 0.155 ( 0.058) 0.016 0.140 19 1.58 0.80 0.155 ( 0.058) 0.016 0.140 20 1.67 0.80 0.155 ( 0.058) 0.016 0.140 21 1.75 0.80 0.155 ( 0.058) 0.016 0.140 22 1.83 0.80 0.155 ( 0.058) 0.016 0.140 23 1.92 0.80 0.155 ( 0.058) 0.016 0.140 24 2.00 0.90 0.175 ( 0.058) 0.017 0.157 25 2.08 0.80 0.155 ( 0.058) 0.016 0.140 26 2.17 0.90 0.175 ( 0.058) 0.017 0.157 27 2.25 0.90 0.175 ( 0.058) 0.017 0.157 28 2.33 0.90 0.175 ( 0.058) 0.017 0.157 29 2.42 0.90 0.175 ( 0.058) 0.017 0.157 30 2.50 0.90 0.175 ( 0.058) 0.017 0.157 31 2.58 0.90 0.175 ( 0.058) 0.017 0.157 32 2.67 0.90 0.175 ( 0.058) 0.017 0.157 33 2.75 1.00 0.194 ( 0.058) 0.019 0.175 34 2.83 1.00 0.194 ( 0.058) 0.019 0.175 35 2.92 1.00 0.194 ( 0.058) 0.019 0.175 36 3.00 1.00 0.194 ( 0.058) 0.019 0.175 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 468
Menifee Mayor and City Council
July 15, 2026
Page
1098 of 3153
37 3.08 1.00 0.194 ( 0.058) 0.019 0.175 38 3.17 1.10 0.213 ( 0.058) 0.021 0.192 39 3.25 1.10 0.213 ( 0.058) 0.021 0.192 40 3.33 1.10 0.213 ( 0.058) 0.021 0.192 41 3.42 1.20 0.233 ( 0.058) 0.023 0.210 42 3.50 1.30 0.252 ( 0.058) 0.025 0.227 43 3.58 1.40 0.272 ( 0.058) 0.027 0.245 44 3.67 1.40 0.272 ( 0.058) 0.027 0.245 45 3.75 1.50 0.291 ( 0.058) 0.029 0.262 46 3.83 1.50 0.291 ( 0.058) 0.029 0.262 47 3.92 1.60 0.310 ( 0.058) 0.031 0.279 48 4.00 1.60 0.310 ( 0.058) 0.031 0.279 49 4.08 1.70 0.330 ( 0.058) 0.033 0.297 50 4.17 1.80 0.349 ( 0.058) 0.035 0.314 51 4.25 1.90 0.369 ( 0.058) 0.037 0.332 52 4.33 2.00 0.388 ( 0.058) 0.039 0.349 53 4.42 2.10 0.408 ( 0.058) 0.041 0.367 54 4.50 2.10 0.408 ( 0.058) 0.041 0.367 55 4.58 2.20 0.427 ( 0.058) 0.043 0.384 56 4.67 2.30 0.446 ( 0.058) 0.045 0.402 57 4.75 2.40 0.466 ( 0.058) 0.047 0.419 58 4.83 2.40 0.466 ( 0.058) 0.047 0.419 59 4.92 2.50 0.485 ( 0.058) 0.049 0.437 60 5.00 2.60 0.505 ( 0.058) 0.050 0.454 61 5.08 3.10 0.602 0.058 ( 0.060) 0.544 62 5.17 3.60 0.699 0.058 ( 0.070) 0.641 63 5.25 3.90 0.757 0.058 ( 0.076) 0.699 64 5.33 4.20 0.815 0.058 ( 0.082) 0.757 65 5.42 4.70 0.912 0.058 ( 0.091) 0.854 66 5.50 5.60 1.087 0.058 ( 0.109) 1.029 67 5.58 1.90 0.369 ( 0.058) 0.037 0.332 68 5.67 0.90 0.175 ( 0.058) 0.017 0.157 69 5.75 0.60 0.116 ( 0.058) 0.012 0.105 70 5.83 0.50 0.097 ( 0.058) 0.010 0.087 71 5.92 0.30 0.058 ( 0.058) 0.006 0.052 72 6.00 0.20 0.039 ( 0.058) 0.004 0.035 (Loss Rate Not Used)
Sum = 100.0 Sum = 17.6 Flood volume = Effective rainfall 1.47(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 1.0(Ac.Ft) Total soil loss = 0.15(In)
Total soil loss = 0.105(Ac.Ft)
Total rainfall = 1.62(In)
Flood volume = 44683.5 Cubic Feet
Total soil loss = 4565.4 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 8.227(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 6 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0034 0.50 VQ | | | | 0+10 0.0092 0.84 V Q | | | | 0+15 0.0153 0.89 V Q | | | | 0+20 0.0214 0.89 V Q | | | | 0+25 0.0275 0.89 |V Q | | | | 0+30 0.0343 0.99 |V Q | | | | 0+35 0.0414 1.03 |V Q | | | | 0+40 0.0486 1.03 |V Q | | | | 0+45 0.0557 1.03 | V Q | | | | 0+50 0.0628 1.03 | V Q | | | | 0+55 0.0699 1.03 | V Q | | | | 1+ 0 0.0777 1.13 | VQ | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 469
Menifee Mayor and City Council
July 15, 2026
Page
1099 of 3153
1+ 5 0.0859 1.18 | VQ | | | | 1+10 0.0940 1.18 | VQ | | | | 1+15 0.1022 1.18 | VQ | | | | 1+20 0.1103 1.18 | Q | | | | 1+25 0.1184 1.18 | Q | | | | 1+30 0.1266 1.18 | Q | | | | 1+35 0.1347 1.18 | QV | | | | 1+40 0.1429 1.18 | QV | | | | 1+45 0.1510 1.18 | QV | | | | 1+50 0.1591 1.18 | Q V | | | | 1+55 0.1673 1.18 | Q V | | | | 2+ 0 0.1761 1.28 | QV | | | | 2+ 5 0.1846 1.23 | Q V | | | | 2+10 0.1934 1.28 | Q V | | | | 2+15 0.2026 1.33 | Q V | | | | 2+20 0.2117 1.33 | Q V | | | | 2+25 0.2209 1.33 | Q V | | | | 2+30 0.2300 1.33 | Q V | | | | 2+35 0.2392 1.33 | Q V| | | | 2+40 0.2484 1.33 | Q V| | | | 2+45 0.2582 1.43 | Q V | | | 2+50 0.2684 1.48 | Q V | | | 2+55 0.2786 1.48 | Q V | | | 3+ 0 0.2887 1.48 | Q |V | | | 3+ 5 0.2989 1.48 | Q |V | | | 3+10 0.3098 1.58 | Q | V | | | 3+15 0.3210 1.63 | Q | V | | | 3+20 0.3322 1.63 | Q | V | | | 3+25 0.3440 1.73 | Q | V | | | 3+30 0.3569 1.87 | Q | V | | | 3+35 0.3709 2.02 | Q | V | | | 3+40 0.3851 2.07 | Q | V | | | 3+45 0.4000 2.17 | Q | V | | | 3+50 0.4153 2.22 | Q | V | | | 3+55 0.4312 2.32 | Q| V | | | 4+ 0 0.4475 2.36 | Q| V | | | 4+ 5 0.4645 2.46 | Q| V | | | 4+10 0.4825 2.61 | Q V | | | 4+15 0.5015 2.76 | |Q V| | | 4+20 0.5215 2.91 | |Q V | | 4+25 0.5425 3.05 | | Q |V | | 4+30 0.5639 3.10 | | Q |V | | 4+35 0.5860 3.20 | | Q | V | | 4+40 0.6090 3.35 | | Q | V | | 4+45 0.6331 3.50 | | Q | V | | 4+50 0.6576 3.55 | | Q | V | | 4+55 0.6827 3.65 | | Q | V | | 5+ 0 0.7088 3.79 | | Q | V | | 5+ 5 0.7388 4.36 | | Q | V | | 5+10 0.7743 5.16 | | Q V | 5+15 0.8139 5.76 | | | Q |V | 5+20 0.8570 6.25 | | | Q | V | 5+25 0.9049 6.96 | | | Q | V | 5+30 0.9616 8.23 | | | | Q V | 5+35 0.9941 4.72 | | Q | | V | 5+40 1.0065 1.81 | Q | | | V| 5+45 1.0136 1.03 | Q | | | V| 5+50 1.0191 0.79 | Q | | | V| 5+55 1.0228 0.54 | Q | | | V| 6+ 0 1.0251 0.34 |Q | | | V| 6+ 5 1.0258 0.10 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 470
Menifee Mayor and City Council
July 15, 2026
Page
1100 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10B2410.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
EASTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.39(Ac.) = 0.013 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.39(Ac.) = 0.013 Sq. Mi.
Length along longest watercourse = 425.00(Ft.)
Length along longest watercourse measured to centroid = 215.00(Ft.) Length along longest watercourse = 0.080 Mi.
Length along longest watercourse measured to centroid = 0.041 Mi.
Difference in elevation = 4.58(Ft.)
Slope along watercourse = 56.8998 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.019 Hr.
Lag time = 1.14 Min.
25% of lag time = 0.28 Min.
40% of lag time = 0.46 Min.
Unit time = 5.00 Min.
Duration of storm = 24 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 1.60 13.42
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.39 4.00 33.56
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.600(In)
Area Averaged 100-Year Rainfall = 4.000(In)
Point rain (area averaged) = 2.587(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 2.587(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 471
Menifee Mayor and City Council
July 15, 2026
Page
1101 of 3153
8.390 75.00 0.900
Total Area Entered = 8.39(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 438.606 67.570 5.713 2 0.167 877.212 32.430 2.742 Sum = 100.000 Sum= 8.456
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.07 0.021 ( 0.102) 0.002 0.019 2 0.17 0.07 0.021 ( 0.102) 0.002 0.019 3 0.25 0.07 0.021 ( 0.101) 0.002 0.019 4 0.33 0.10 0.031 ( 0.101) 0.003 0.028 5 0.42 0.10 0.031 ( 0.100) 0.003 0.028 6 0.50 0.10 0.031 ( 0.100) 0.003 0.028 7 0.58 0.10 0.031 ( 0.100) 0.003 0.028 8 0.67 0.10 0.031 ( 0.099) 0.003 0.028 9 0.75 0.10 0.031 ( 0.099) 0.003 0.028 10 0.83 0.13 0.041 ( 0.099) 0.004 0.037 11 0.92 0.13 0.041 ( 0.098) 0.004 0.037 12 1.00 0.13 0.041 ( 0.098) 0.004 0.037 13 1.08 0.10 0.031 ( 0.097) 0.003 0.028 14 1.17 0.10 0.031 ( 0.097) 0.003 0.028 15 1.25 0.10 0.031 ( 0.097) 0.003 0.028 16 1.33 0.10 0.031 ( 0.096) 0.003 0.028 17 1.42 0.10 0.031 ( 0.096) 0.003 0.028 18 1.50 0.10 0.031 ( 0.095) 0.003 0.028 19 1.58 0.10 0.031 ( 0.095) 0.003 0.028 20 1.67 0.10 0.031 ( 0.095) 0.003 0.028 21 1.75 0.10 0.031 ( 0.094) 0.003 0.028 22 1.83 0.13 0.041 ( 0.094) 0.004 0.037 23 1.92 0.13 0.041 ( 0.094) 0.004 0.037 24 2.00 0.13 0.041 ( 0.093) 0.004 0.037 25 2.08 0.13 0.041 ( 0.093) 0.004 0.037 26 2.17 0.13 0.041 ( 0.092) 0.004 0.037 27 2.25 0.13 0.041 ( 0.092) 0.004 0.037 28 2.33 0.13 0.041 ( 0.092) 0.004 0.037 29 2.42 0.13 0.041 ( 0.091) 0.004 0.037 30 2.50 0.13 0.041 ( 0.091) 0.004 0.037 31 2.58 0.17 0.052 ( 0.091) 0.005 0.047 32 2.67 0.17 0.052 ( 0.090) 0.005 0.047 33 2.75 0.17 0.052 ( 0.090) 0.005 0.047 34 2.83 0.17 0.052 ( 0.089) 0.005 0.047 35 2.92 0.17 0.052 ( 0.089) 0.005 0.047 36 3.00 0.17 0.052 ( 0.089) 0.005 0.047 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 472
Menifee Mayor and City Council
July 15, 2026
Page
1102 of 3153
37 3.08 0.17 0.052 ( 0.088) 0.005 0.047 38 3.17 0.17 0.052 ( 0.088) 0.005 0.047 39 3.25 0.17 0.052 ( 0.088) 0.005 0.047 40 3.33 0.17 0.052 ( 0.087) 0.005 0.047 41 3.42 0.17 0.052 ( 0.087) 0.005 0.047 42 3.50 0.17 0.052 ( 0.087) 0.005 0.047 43 3.58 0.17 0.052 ( 0.086) 0.005 0.047 44 3.67 0.17 0.052 ( 0.086) 0.005 0.047 45 3.75 0.17 0.052 ( 0.085) 0.005 0.047 46 3.83 0.20 0.062 ( 0.085) 0.006 0.056 47 3.92 0.20 0.062 ( 0.085) 0.006 0.056 48 4.00 0.20 0.062 ( 0.084) 0.006 0.056 49 4.08 0.20 0.062 ( 0.084) 0.006 0.056 50 4.17 0.20 0.062 ( 0.084) 0.006 0.056 51 4.25 0.20 0.062 ( 0.083) 0.006 0.056 52 4.33 0.23 0.072 ( 0.083) 0.007 0.065 53 4.42 0.23 0.072 ( 0.083) 0.007 0.065 54 4.50 0.23 0.072 ( 0.082) 0.007 0.065 55 4.58 0.23 0.072 ( 0.082) 0.007 0.065 56 4.67 0.23 0.072 ( 0.082) 0.007 0.065 57 4.75 0.23 0.072 ( 0.081) 0.007 0.065 58 4.83 0.27 0.083 ( 0.081) 0.008 0.075 59 4.92 0.27 0.083 ( 0.080) 0.008 0.075 60 5.00 0.27 0.083 ( 0.080) 0.008 0.075 61 5.08 0.20 0.062 ( 0.080) 0.006 0.056 62 5.17 0.20 0.062 ( 0.079) 0.006 0.056 63 5.25 0.20 0.062 ( 0.079) 0.006 0.056 64 5.33 0.23 0.072 ( 0.079) 0.007 0.065 65 5.42 0.23 0.072 ( 0.078) 0.007 0.065 66 5.50 0.23 0.072 ( 0.078) 0.007 0.065 67 5.58 0.27 0.083 ( 0.078) 0.008 0.075 68 5.67 0.27 0.083 ( 0.077) 0.008 0.075 69 5.75 0.27 0.083 ( 0.077) 0.008 0.075 70 5.83 0.27 0.083 ( 0.077) 0.008 0.075 71 5.92 0.27 0.083 ( 0.076) 0.008 0.075 72 6.00 0.27 0.083 ( 0.076) 0.008 0.075 73 6.08 0.30 0.093 ( 0.076) 0.009 0.084 74 6.17 0.30 0.093 ( 0.075) 0.009 0.084 75 6.25 0.30 0.093 ( 0.075) 0.009 0.084 76 6.33 0.30 0.093 ( 0.075) 0.009 0.084 77 6.42 0.30 0.093 ( 0.074) 0.009 0.084 78 6.50 0.30 0.093 ( 0.074) 0.009 0.084 79 6.58 0.33 0.103 ( 0.074) 0.010 0.093 80 6.67 0.33 0.103 ( 0.073) 0.010 0.093 81 6.75 0.33 0.103 ( 0.073) 0.010 0.093 82 6.83 0.33 0.103 ( 0.073) 0.010 0.093 83 6.92 0.33 0.103 ( 0.072) 0.010 0.093 84 7.00 0.33 0.103 ( 0.072) 0.010 0.093 85 7.08 0.33 0.103 ( 0.072) 0.010 0.093 86 7.17 0.33 0.103 ( 0.071) 0.010 0.093 87 7.25 0.33 0.103 ( 0.071) 0.010 0.093 88 7.33 0.37 0.114 ( 0.071) 0.011 0.102 89 7.42 0.37 0.114 ( 0.070) 0.011 0.102 90 7.50 0.37 0.114 ( 0.070) 0.011 0.102 91 7.58 0.40 0.124 ( 0.070) 0.012 0.112 92 7.67 0.40 0.124 ( 0.069) 0.012 0.112 93 7.75 0.40 0.124 ( 0.069) 0.012 0.112 94 7.83 0.43 0.135 ( 0.069) 0.013 0.121 95 7.92 0.43 0.135 ( 0.068) 0.013 0.121 96 8.00 0.43 0.135 ( 0.068) 0.013 0.121 97 8.08 0.50 0.155 ( 0.068) 0.016 0.140 98 8.17 0.50 0.155 ( 0.067) 0.016 0.140 99 8.25 0.50 0.155 ( 0.067) 0.016 0.140 100 8.33 0.50 0.155 ( 0.067) 0.016 0.140 101 8.42 0.50 0.155 ( 0.067) 0.016 0.140 102 8.50 0.50 0.155 ( 0.066) 0.016 0.140 103 8.58 0.53 0.166 ( 0.066) 0.017 0.149 104 8.67 0.53 0.166 ( 0.066) 0.017 0.149 105 8.75 0.53 0.166 ( 0.065) 0.017 0.149 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 473
Menifee Mayor and City Council
July 15, 2026
Page
1103 of 3153
106 8.83 0.57 0.176 ( 0.065) 0.018 0.158 107 8.92 0.57 0.176 ( 0.065) 0.018 0.158 108 9.00 0.57 0.176 ( 0.064) 0.018 0.158 109 9.08 0.63 0.197 ( 0.064) 0.020 0.177 110 9.17 0.63 0.197 ( 0.064) 0.020 0.177 111 9.25 0.63 0.197 ( 0.063) 0.020 0.177 112 9.33 0.67 0.207 ( 0.063) 0.021 0.186 113 9.42 0.67 0.207 ( 0.063) 0.021 0.186 114 9.50 0.67 0.207 ( 0.063) 0.021 0.186 115 9.58 0.70 0.217 ( 0.062) 0.022 0.196 116 9.67 0.70 0.217 ( 0.062) 0.022 0.196 117 9.75 0.70 0.217 ( 0.062) 0.022 0.196 118 9.83 0.73 0.228 ( 0.061) 0.023 0.205 119 9.92 0.73 0.228 ( 0.061) 0.023 0.205 120 10.00 0.73 0.228 ( 0.061) 0.023 0.205 121 10.08 0.50 0.155 ( 0.060) 0.016 0.140 122 10.17 0.50 0.155 ( 0.060) 0.016 0.140 123 10.25 0.50 0.155 ( 0.060) 0.016 0.140 124 10.33 0.50 0.155 ( 0.060) 0.016 0.140 125 10.42 0.50 0.155 ( 0.059) 0.016 0.140 126 10.50 0.50 0.155 ( 0.059) 0.016 0.140 127 10.58 0.67 0.207 ( 0.059) 0.021 0.186 128 10.67 0.67 0.207 ( 0.058) 0.021 0.186 129 10.75 0.67 0.207 ( 0.058) 0.021 0.186 130 10.83 0.67 0.207 ( 0.058) 0.021 0.186 131 10.92 0.67 0.207 ( 0.058) 0.021 0.186 132 11.00 0.67 0.207 ( 0.057) 0.021 0.186 133 11.08 0.63 0.197 ( 0.057) 0.020 0.177 134 11.17 0.63 0.197 ( 0.057) 0.020 0.177 135 11.25 0.63 0.197 ( 0.056) 0.020 0.177 136 11.33 0.63 0.197 ( 0.056) 0.020 0.177 137 11.42 0.63 0.197 ( 0.056) 0.020 0.177 138 11.50 0.63 0.197 ( 0.056) 0.020 0.177 139 11.58 0.57 0.176 ( 0.055) 0.018 0.158 140 11.67 0.57 0.176 ( 0.055) 0.018 0.158 141 11.75 0.57 0.176 ( 0.055) 0.018 0.158 142 11.83 0.60 0.186 ( 0.055) 0.019 0.168 143 11.92 0.60 0.186 ( 0.054) 0.019 0.168 144 12.00 0.60 0.186 ( 0.054) 0.019 0.168 145 12.08 0.83 0.259 ( 0.054) 0.026 0.233 146 12.17 0.83 0.259 ( 0.053) 0.026 0.233 147 12.25 0.83 0.259 ( 0.053) 0.026 0.233 148 12.33 0.87 0.269 ( 0.053) 0.027 0.242 149 12.42 0.87 0.269 ( 0.053) 0.027 0.242 150 12.50 0.87 0.269 ( 0.052) 0.027 0.242 151 12.58 0.93 0.290 ( 0.052) 0.029 0.261 152 12.67 0.93 0.290 ( 0.052) 0.029 0.261 153 12.75 0.93 0.290 ( 0.052) 0.029 0.261 154 12.83 0.97 0.300 ( 0.051) 0.030 0.270 155 12.92 0.97 0.300 ( 0.051) 0.030 0.270 156 13.00 0.97 0.300 ( 0.051) 0.030 0.270 157 13.08 1.13 0.352 ( 0.051) 0.035 0.317 158 13.17 1.13 0.352 ( 0.050) 0.035 0.317 159 13.25 1.13 0.352 ( 0.050) 0.035 0.317 160 13.33 1.13 0.352 ( 0.050) 0.035 0.317 161 13.42 1.13 0.352 ( 0.050) 0.035 0.317 162 13.50 1.13 0.352 ( 0.049) 0.035 0.317 163 13.58 0.77 0.238 ( 0.049) 0.024 0.214 164 13.67 0.77 0.238 ( 0.049) 0.024 0.214 165 13.75 0.77 0.238 ( 0.049) 0.024 0.214 166 13.83 0.77 0.238 ( 0.048) 0.024 0.214 167 13.92 0.77 0.238 ( 0.048) 0.024 0.214 168 14.00 0.77 0.238 ( 0.048) 0.024 0.214 169 14.08 0.90 0.279 ( 0.048) 0.028 0.251 170 14.17 0.90 0.279 ( 0.047) 0.028 0.251 171 14.25 0.90 0.279 ( 0.047) 0.028 0.251 172 14.33 0.87 0.269 ( 0.047) 0.027 0.242 173 14.42 0.87 0.269 ( 0.047) 0.027 0.242 174 14.50 0.87 0.269 ( 0.046) 0.027 0.242 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 474
Menifee Mayor and City Council
July 15, 2026
Page
1104 of 3153
175 14.58 0.87 0.269 ( 0.046) 0.027 0.242 176 14.67 0.87 0.269 ( 0.046) 0.027 0.242 177 14.75 0.87 0.269 ( 0.046) 0.027 0.242 178 14.83 0.83 0.259 ( 0.045) 0.026 0.233 179 14.92 0.83 0.259 ( 0.045) 0.026 0.233 180 15.00 0.83 0.259 ( 0.045) 0.026 0.233 181 15.08 0.80 0.248 ( 0.045) 0.025 0.224 182 15.17 0.80 0.248 ( 0.045) 0.025 0.224 183 15.25 0.80 0.248 ( 0.044) 0.025 0.224 184 15.33 0.77 0.238 ( 0.044) 0.024 0.214 185 15.42 0.77 0.238 ( 0.044) 0.024 0.214 186 15.50 0.77 0.238 ( 0.044) 0.024 0.214 187 15.58 0.63 0.197 ( 0.043) 0.020 0.177 188 15.67 0.63 0.197 ( 0.043) 0.020 0.177 189 15.75 0.63 0.197 ( 0.043) 0.020 0.177 190 15.83 0.63 0.197 ( 0.043) 0.020 0.177 191 15.92 0.63 0.197 ( 0.042) 0.020 0.177 192 16.00 0.63 0.197 ( 0.042) 0.020 0.177 193 16.08 0.13 0.041 ( 0.042) 0.004 0.037 194 16.17 0.13 0.041 ( 0.042) 0.004 0.037 195 16.25 0.13 0.041 ( 0.042) 0.004 0.037 196 16.33 0.13 0.041 ( 0.041) 0.004 0.037 197 16.42 0.13 0.041 ( 0.041) 0.004 0.037 198 16.50 0.13 0.041 ( 0.041) 0.004 0.037 199 16.58 0.10 0.031 ( 0.041) 0.003 0.028 200 16.67 0.10 0.031 ( 0.041) 0.003 0.028 201 16.75 0.10 0.031 ( 0.040) 0.003 0.028 202 16.83 0.10 0.031 ( 0.040) 0.003 0.028 203 16.92 0.10 0.031 ( 0.040) 0.003 0.028 204 17.00 0.10 0.031 ( 0.040) 0.003 0.028 205 17.08 0.17 0.052 ( 0.040) 0.005 0.047 206 17.17 0.17 0.052 ( 0.039) 0.005 0.047 207 17.25 0.17 0.052 ( 0.039) 0.005 0.047 208 17.33 0.17 0.052 ( 0.039) 0.005 0.047 209 17.42 0.17 0.052 ( 0.039) 0.005 0.047 210 17.50 0.17 0.052 ( 0.039) 0.005 0.047 211 17.58 0.17 0.052 ( 0.038) 0.005 0.047 212 17.67 0.17 0.052 ( 0.038) 0.005 0.047 213 17.75 0.17 0.052 ( 0.038) 0.005 0.047 214 17.83 0.13 0.041 ( 0.038) 0.004 0.037 215 17.92 0.13 0.041 ( 0.038) 0.004 0.037 216 18.00 0.13 0.041 ( 0.037) 0.004 0.037 217 18.08 0.13 0.041 ( 0.037) 0.004 0.037 218 18.17 0.13 0.041 ( 0.037) 0.004 0.037 219 18.25 0.13 0.041 ( 0.037) 0.004 0.037 220 18.33 0.13 0.041 ( 0.037) 0.004 0.037 221 18.42 0.13 0.041 ( 0.037) 0.004 0.037 222 18.50 0.13 0.041 ( 0.036) 0.004 0.037 223 18.58 0.10 0.031 ( 0.036) 0.003 0.028 224 18.67 0.10 0.031 ( 0.036) 0.003 0.028 225 18.75 0.10 0.031 ( 0.036) 0.003 0.028 226 18.83 0.07 0.021 ( 0.036) 0.002 0.019 227 18.92 0.07 0.021 ( 0.035) 0.002 0.019 228 19.00 0.07 0.021 ( 0.035) 0.002 0.019 229 19.08 0.10 0.031 ( 0.035) 0.003 0.028 230 19.17 0.10 0.031 ( 0.035) 0.003 0.028 231 19.25 0.10 0.031 ( 0.035) 0.003 0.028 232 19.33 0.13 0.041 ( 0.035) 0.004 0.037 233 19.42 0.13 0.041 ( 0.035) 0.004 0.037 234 19.50 0.13 0.041 ( 0.034) 0.004 0.037 235 19.58 0.10 0.031 ( 0.034) 0.003 0.028 236 19.67 0.10 0.031 ( 0.034) 0.003 0.028 237 19.75 0.10 0.031 ( 0.034) 0.003 0.028 238 19.83 0.07 0.021 ( 0.034) 0.002 0.019 239 19.92 0.07 0.021 ( 0.034) 0.002 0.019 240 20.00 0.07 0.021 ( 0.033) 0.002 0.019 241 20.08 0.10 0.031 ( 0.033) 0.003 0.028 242 20.17 0.10 0.031 ( 0.033) 0.003 0.028 243 20.25 0.10 0.031 ( 0.033) 0.003 0.028 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 475
Menifee Mayor and City Council
July 15, 2026
Page
1105 of 3153
244 20.33 0.10 0.031 ( 0.033) 0.003 0.028 245 20.42 0.10 0.031 ( 0.033) 0.003 0.028 246 20.50 0.10 0.031 ( 0.033) 0.003 0.028 247 20.58 0.10 0.031 ( 0.032) 0.003 0.028 248 20.67 0.10 0.031 ( 0.032) 0.003 0.028 249 20.75 0.10 0.031 ( 0.032) 0.003 0.028 250 20.83 0.07 0.021 ( 0.032) 0.002 0.019 251 20.92 0.07 0.021 ( 0.032) 0.002 0.019 252 21.00 0.07 0.021 ( 0.032) 0.002 0.019 253 21.08 0.10 0.031 ( 0.032) 0.003 0.028 254 21.17 0.10 0.031 ( 0.032) 0.003 0.028 255 21.25 0.10 0.031 ( 0.031) 0.003 0.028 256 21.33 0.07 0.021 ( 0.031) 0.002 0.019 257 21.42 0.07 0.021 ( 0.031) 0.002 0.019 258 21.50 0.07 0.021 ( 0.031) 0.002 0.019 259 21.58 0.10 0.031 ( 0.031) 0.003 0.028 260 21.67 0.10 0.031 ( 0.031) 0.003 0.028 261 21.75 0.10 0.031 ( 0.031) 0.003 0.028 262 21.83 0.07 0.021 ( 0.031) 0.002 0.019 263 21.92 0.07 0.021 ( 0.030) 0.002 0.019 264 22.00 0.07 0.021 ( 0.030) 0.002 0.019 265 22.08 0.10 0.031 ( 0.030) 0.003 0.028 266 22.17 0.10 0.031 ( 0.030) 0.003 0.028 267 22.25 0.10 0.031 ( 0.030) 0.003 0.028 268 22.33 0.07 0.021 ( 0.030) 0.002 0.019 269 22.42 0.07 0.021 ( 0.030) 0.002 0.019 270 22.50 0.07 0.021 ( 0.030) 0.002 0.019 271 22.58 0.07 0.021 ( 0.030) 0.002 0.019 272 22.67 0.07 0.021 ( 0.030) 0.002 0.019 273 22.75 0.07 0.021 ( 0.030) 0.002 0.019 274 22.83 0.07 0.021 ( 0.029) 0.002 0.019 275 22.92 0.07 0.021 ( 0.029) 0.002 0.019 276 23.00 0.07 0.021 ( 0.029) 0.002 0.019 277 23.08 0.07 0.021 ( 0.029) 0.002 0.019 278 23.17 0.07 0.021 ( 0.029) 0.002 0.019 279 23.25 0.07 0.021 ( 0.029) 0.002 0.019 280 23.33 0.07 0.021 ( 0.029) 0.002 0.019 281 23.42 0.07 0.021 ( 0.029) 0.002 0.019 282 23.50 0.07 0.021 ( 0.029) 0.002 0.019 283 23.58 0.07 0.021 ( 0.029) 0.002 0.019 284 23.67 0.07 0.021 ( 0.029) 0.002 0.019 285 23.75 0.07 0.021 ( 0.029) 0.002 0.019 286 23.83 0.07 0.021 ( 0.029) 0.002 0.019 287 23.92 0.07 0.021 ( 0.029) 0.002 0.019 288 24.00 0.07 0.021 ( 0.029) 0.002 0.019 (Loss Rate Not Used)
Sum = 100.0 Sum = 27.9 Flood volume = Effective rainfall 2.33(In)
times area 8.4(Ac.)/[(In)/(Ft.)] = 1.6(Ac.Ft) Total soil loss = 0.26(In)
Total soil loss = 0.181(Ac.Ft)
Total rainfall = 2.59(In)
Flood volume = 70919.2 Cubic Feet
Total soil loss = 7879.9 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 2.679(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0007 0.11 Q | | | | 0+10 0.0018 0.16 Q | | | | 0+15 0.0029 0.16 Q | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 476
Menifee Mayor and City Council
July 15, 2026
Page
1106 of 3153
0+20 0.0044 0.21 Q | | | | 0+25 0.0060 0.24 Q | | | | 0+30 0.0076 0.24 Q | | | | 0+35 0.0092 0.24 Q | | | | 0+40 0.0109 0.24 Q | | | | 0+45 0.0125 0.24 Q | | | | 0+50 0.0145 0.29 VQ | | | | 0+55 0.0167 0.32 VQ | | | | 1+ 0 0.0188 0.32 VQ | | | | 1+ 5 0.0206 0.26 VQ | | | | 1+10 0.0223 0.24 Q | | | | 1+15 0.0239 0.24 Q | | | | 1+20 0.0255 0.24 Q | | | | 1+25 0.0271 0.24 Q | | | | 1+30 0.0288 0.24 Q | | | | 1+35 0.0304 0.24 Q | | | | 1+40 0.0320 0.24 Q | | | | 1+45 0.0337 0.24 Q | | | | 1+50 0.0357 0.29 VQ | | | | 1+55 0.0378 0.32 VQ | | | | 2+ 0 0.0400 0.32 VQ | | | | 2+ 5 0.0422 0.32 |Q | | | | 2+10 0.0443 0.32 |Q | | | | 2+15 0.0465 0.32 |Q | | | | 2+20 0.0487 0.32 |Q | | | | 2+25 0.0509 0.32 |Q | | | | 2+30 0.0530 0.32 |Q | | | | 2+35 0.0556 0.37 |Q | | | | 2+40 0.0583 0.39 |Q | | | | 2+45 0.0610 0.39 |Q | | | | 2+50 0.0637 0.39 |Q | | | | 2+55 0.0664 0.39 |Q | | | | 3+ 0 0.0691 0.39 |Q | | | | 3+ 5 0.0718 0.39 |Q | | | | 3+10 0.0746 0.39 |Q | | | | 3+15 0.0773 0.39 |Q | | | | 3+20 0.0800 0.39 |Q | | | | 3+25 0.0827 0.39 |QV | | | | 3+30 0.0854 0.39 |QV | | | | 3+35 0.0881 0.39 |QV | | | | 3+40 0.0908 0.39 |QV | | | | 3+45 0.0935 0.39 |QV | | | | 3+50 0.0966 0.45 |QV | | | | 3+55 0.0999 0.47 |QV | | | | 4+ 0 0.1031 0.47 |QV | | | | 4+ 5 0.1064 0.47 |QV | | | | 4+10 0.1097 0.47 |QV | | | | 4+15 0.1129 0.47 |QV | | | | 4+20 0.1165 0.53 | Q | | | | 4+25 0.1203 0.55 | Q | | | | 4+30 0.1241 0.55 | QV | | | | 4+35 0.1279 0.55 | QV | | | | 4+40 0.1317 0.55 | QV | | | | 4+45 0.1355 0.55 | QV | | | | 4+50 0.1397 0.60 | QV | | | | 4+55 0.1440 0.63 | QV | | | | 5+ 0 0.1484 0.63 | QV | | | | 5+ 5 0.1520 0.52 | QV | | | | 5+10 0.1552 0.47 |Q V | | | | 5+15 0.1585 0.47 |Q V | | | | 5+20 0.1621 0.53 | QV | | | | 5+25 0.1659 0.55 | Q V | | | | 5+30 0.1697 0.55 | Q V | | | | 5+35 0.1739 0.60 | Q V | | | | 5+40 0.1782 0.63 | Q V | | | | 5+45 0.1826 0.63 | Q V | | | | 5+50 0.1869 0.63 | Q V | | | | 5+55 0.1912 0.63 | Q V | | | | 6+ 0 0.1956 0.63 | Q V | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 477
Menifee Mayor and City Council
July 15, 2026
Page
1107 of 3153
6+ 5 0.2003 0.68 | Q V | | | | 6+10 0.2052 0.71 | Q V | | | | 6+15 0.2101 0.71 | Q V | | | | 6+20 0.2150 0.71 | Q V | | | | 6+25 0.2198 0.71 | Q V | | | | 6+30 0.2247 0.71 | Q V | | | | 6+35 0.2300 0.76 | Q V | | | | 6+40 0.2354 0.79 | Q V | | | | 6+45 0.2408 0.79 | Q V | | | | 6+50 0.2463 0.79 | Q V | | | | 6+55 0.2517 0.79 | Q V | | | | 7+ 0 0.2571 0.79 | Q V | | | | 7+ 5 0.2625 0.79 | Q V | | | | 7+10 0.2680 0.79 | Q V | | | | 7+15 0.2734 0.79 | Q V | | | | 7+20 0.2792 0.84 | Q V | | | | 7+25 0.2851 0.87 | Q V | | | | 7+30 0.2911 0.87 | Q V | | | | 7+35 0.2975 0.92 | Q V | | | | 7+40 0.3040 0.95 | Q V | | | | 7+45 0.3105 0.95 | Q V | | | | 7+50 0.3174 1.00 | Q V | | | | 7+55 0.3244 1.02 | Q V | | | | 8+ 0 0.3315 1.02 | Q V | | | | 8+ 5 0.3393 1.13 | Q V | | | | 8+10 0.3474 1.18 | Q V | | | | 8+15 0.3555 1.18 | Q V | | | | 8+20 0.3637 1.18 | Q V | | | | 8+25 0.3718 1.18 | Q V| | | | 8+30 0.3800 1.18 | Q V| | | | 8+35 0.3885 1.24 | Q V| | | | 8+40 0.3971 1.26 | Q V| | | | 8+45 0.4058 1.26 | Q V| | | | 8+50 0.4149 1.31 | Q V | | | 8+55 0.4241 1.34 | Q V | | | 9+ 0 0.4333 1.34 | Q V | | | 9+ 5 0.4433 1.45 | Q V | | | 9+10 0.4536 1.50 | Q |V | | | 9+15 0.4639 1.50 | Q |V | | | 9+20 0.4746 1.55 | Q |V | | | 9+25 0.4854 1.58 | Q |V | | | 9+30 0.4963 1.58 | Q | V | | | 9+35 0.5075 1.63 | Q | V | | | 9+40 0.5189 1.65 | Q | V | | | 9+45 0.5303 1.65 | Q | V | | | 9+50 0.5421 1.71 | Q | V | | | 9+55 0.5540 1.73 | Q | V | | | 10+ 0 0.5660 1.73 | Q | V | | | 10+ 5 0.5753 1.36 | Q | V | | | 10+10 0.5835 1.18 | Q | V | | | 10+15 0.5916 1.18 | Q | V | | | 10+20 0.5998 1.18 | Q | V | | | 10+25 0.6079 1.18 | Q | V | | | 10+30 0.6160 1.18 | Q | V | | | 10+35 0.6260 1.45 | Q | V | | | 10+40 0.6369 1.58 | Q | V | | | 10+45 0.6477 1.58 | Q | V | | | 10+50 0.6586 1.58 | Q | V | | | 10+55 0.6694 1.58 | Q | V | | | 11+ 0 0.6803 1.58 | Q | V | | | 11+ 5 0.6908 1.52 | Q | V | | | 11+10 0.7011 1.50 | Q | V | | | 11+15 0.7114 1.50 | Q | V | | | 11+20 0.7217 1.50 | Q | V | | | 11+25 0.7320 1.50 | Q | V | | | 11+30 0.7423 1.50 | Q | V | | | 11+35 0.7519 1.39 | Q | V | | | 11+40 0.7611 1.34 | Q | V | | | 11+45 0.7703 1.34 | Q | V | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 478
Menifee Mayor and City Council
July 15, 2026
Page
1108 of 3153
11+50 0.7799 1.39 | Q | V| | | 11+55 0.7897 1.42 | Q | V| | | 12+ 0 0.7995 1.42 | Q | V| | | 12+ 5 0.8118 1.79 | Q | V| | | 12+10 0.8254 1.97 | Q | V | | 12+15 0.8389 1.97 | Q | V | | 12+20 0.8529 2.02 | Q | V | | 12+25 0.8670 2.05 | Q | |V | | 12+30 0.8811 2.05 | Q | |V | | 12+35 0.8959 2.16 | Q | | V | | 12+40 0.9111 2.21 | Q | | V | | 12+45 0.9263 2.21 | Q | | V | | 12+50 0.9419 2.26 | Q| | V | | 12+55 0.9576 2.29 | Q| | V | | 13+ 0 0.9734 2.29 | Q| | V | | 13+ 5 0.9909 2.55 | Q | V | | 13+10 1.0094 2.68 | Q | V | | 13+15 1.0278 2.68 | Q | V | | 13+20 1.0463 2.68 | Q | V | | 13+25 1.0648 2.68 | Q | V | | 13+30 1.0832 2.68 | Q | V | | 13+35 1.0976 2.09 | Q | | V | | 13+40 1.1101 1.81 | Q | | V | | 13+45 1.1226 1.81 | Q | | V | | 13+50 1.1351 1.81 | Q | | V | | 13+55 1.1475 1.81 | Q | | V | | 14+ 0 1.1600 1.81 | Q | | V | | 14+ 5 1.1740 2.03 | Q | | V | | 14+10 1.1886 2.13 | Q | | V| | 14+15 1.2033 2.13 | Q | | V| | 14+20 1.2176 2.07 | Q | | V| | 14+25 1.2317 2.05 | Q | | V | 14+30 1.2458 2.05 | Q | | V | 14+35 1.2599 2.05 | Q | | V | 14+40 1.2740 2.05 | Q | | |V | 14+45 1.2881 2.05 | Q | | |V | 14+50 1.3019 2.00 | Q | | |V | 14+55 1.3154 1.97 | Q | | | V | 15+ 0 1.3290 1.97 | Q | | | V | 15+ 5 1.3422 1.92 | Q | | | V | 15+10 1.3552 1.89 | Q | | | V | 15+15 1.3682 1.89 | Q | | | V | 15+20 1.3809 1.84 | Q | | | V | 15+25 1.3934 1.81 | Q | | | V | 15+30 1.4059 1.81 | Q | | | V | 15+35 1.4169 1.60 | Q | | | V | 15+40 1.4272 1.50 | Q | | | V | 15+45 1.4375 1.50 | Q | | | V | 15+50 1.4478 1.50 | Q | | | V | 15+55 1.4581 1.50 | Q | | | V | 16+ 0 1.4684 1.50 | Q | | | V | 16+ 5 1.4733 0.70 | Q | | | V | 16+10 1.4754 0.32 |Q | | | V | 16+15 1.4776 0.32 |Q | | | V | 16+20 1.4798 0.32 |Q | | | V | 16+25 1.4819 0.32 |Q | | | V | 16+30 1.4841 0.32 |Q | | | V | 16+35 1.4859 0.26 |Q | | | V | 16+40 1.4875 0.24 Q | | | V | 16+45 1.4892 0.24 Q | | | V | 16+50 1.4908 0.24 Q | | | V | 16+55 1.4924 0.24 Q | | | V | 17+ 0 1.4941 0.24 Q | | | V | 17+ 5 1.4964 0.34 |Q | | | V | 17+10 1.4991 0.39 |Q | | | V | 17+15 1.5018 0.39 |Q | | | V | 17+20 1.5046 0.39 |Q | | | V | 17+25 1.5073 0.39 |Q | | | V | 17+30 1.5100 0.39 |Q | | | V | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 479
Menifee Mayor and City Council
July 15, 2026
Page
1109 of 3153
17+35 1.5127 0.39 |Q | | | V | 17+40 1.5154 0.39 |Q | | | V | 17+45 1.5181 0.39 |Q | | | V | 17+50 1.5205 0.34 |Q | | | V | 17+55 1.5226 0.32 |Q | | | V | 18+ 0 1.5248 0.32 |Q | | | V | 18+ 5 1.5270 0.32 |Q | | | V | 18+10 1.5292 0.32 |Q | | | V | 18+15 1.5313 0.32 |Q | | | V | 18+20 1.5335 0.32 |Q | | | V | 18+25 1.5357 0.32 |Q | | | V | 18+30 1.5378 0.32 |Q | | | V | 18+35 1.5396 0.26 |Q | | | V | 18+40 1.5413 0.24 Q | | | V | 18+45 1.5429 0.24 Q | | | V | 18+50 1.5442 0.18 Q | | | V | 18+55 1.5452 0.16 Q | | | V | 19+ 0 1.5463 0.16 Q | | | V | 19+ 5 1.5478 0.21 Q | | | V | 19+10 1.5494 0.24 Q | | | V | 19+15 1.5510 0.24 Q | | | V | 19+20 1.5530 0.29 |Q | | | V | 19+25 1.5552 0.32 |Q | | | V | 19+30 1.5574 0.32 |Q | | | V | 19+35 1.5592 0.26 |Q | | | V | 19+40 1.5608 0.24 Q | | | V | 19+45 1.5624 0.24 Q | | | V | 19+50 1.5637 0.18 Q | | | V | 19+55 1.5648 0.16 Q | | | V | 20+ 0 1.5659 0.16 Q | | | V | 20+ 5 1.5673 0.21 Q | | | V | 20+10 1.5689 0.24 Q | | | V | 20+15 1.5706 0.24 Q | | | V | 20+20 1.5722 0.24 Q | | | V | 20+25 1.5738 0.24 Q | | | V | 20+30 1.5755 0.24 Q | | | V | 20+35 1.5771 0.24 Q | | | V | 20+40 1.5787 0.24 Q | | | V | 20+45 1.5803 0.24 Q | | | V | 20+50 1.5816 0.18 Q | | | V | 20+55 1.5827 0.16 Q | | | V | 21+ 0 1.5838 0.16 Q | | | V | 21+ 5 1.5852 0.21 Q | | | V | 21+10 1.5869 0.24 Q | | | V | 21+15 1.5885 0.24 Q | | | V| 21+20 1.5897 0.18 Q | | | V| 21+25 1.5908 0.16 Q | | | V| 21+30 1.5919 0.16 Q | | | V| 21+35 1.5934 0.21 Q | | | V| 21+40 1.5950 0.24 Q | | | V| 21+45 1.5966 0.24 Q | | | V| 21+50 1.5979 0.18 Q | | | V| 21+55 1.5990 0.16 Q | | | V| 22+ 0 1.6001 0.16 Q | | | V| 22+ 5 1.6015 0.21 Q | | | V| 22+10 1.6031 0.24 Q | | | V| 22+15 1.6048 0.24 Q | | | V| 22+20 1.6060 0.18 Q | | | V| 22+25 1.6071 0.16 Q | | | V| 22+30 1.6082 0.16 Q | | | V| 22+35 1.6093 0.16 Q | | | V| 22+40 1.6104 0.16 Q | | | V| 22+45 1.6114 0.16 Q | | | V| 22+50 1.6125 0.16 Q | | | V| 22+55 1.6136 0.16 Q | | | V| 23+ 0 1.6147 0.16 Q | | | V| 23+ 5 1.6158 0.16 Q | | | V| 23+10 1.6169 0.16 Q | | | V| 23+15 1.6180 0.16 Q | | | V| Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 480
Menifee Mayor and City Council
July 15, 2026
Page
1110 of 3153
23+20 1.6190 0.16 Q | | | V| 23+25 1.6201 0.16 Q | | | V| 23+30 1.6212 0.16 Q | | | V| 23+35 1.6223 0.16 Q | | | V| 23+40 1.6234 0.16 Q | | | V| 23+45 1.6245 0.16 Q | | | V| 23+50 1.6256 0.16 Q | | | V| 23+55 1.6266 0.16 Q | | | V| 24+ 0 1.6277 0.16 Q | | | V| 24+ 5 1.6281 0.05 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 481
Menifee Mayor and City Council
July 15, 2026
Page
1111 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10A110.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
WESTERLY PARKING AREA
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.063 Hr.
Lag time = 3.78 Min.
25% of lag time = 0.95 Min.
40% of lag time = 1.51 Min.
Unit time = 5.00 Min.
Duration of storm = 1 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 0.45 3.96
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.20 10.57
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.450(In)
Area Averaged 100-Year Rainfall = 1.200(In)
Point rain (area averaged) = 0.759(In)
Areal adjustment factor = 99.99 %
Adjusted average point rain = 0.758(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 482
Menifee Mayor and City Council
July 15, 2026
Page
1112 of 3153
8.810 93.00 0.000
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- Slope of intensity-duration curve for a 1 hour storm =0.5000 ---------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 132.225 28.626 2.542 2 0.167 264.451 48.173 4.277 3 0.250 396.676 12.339 1.096 4 0.333 528.901 5.498 0.488 5 0.417 661.127 3.009 0.267 6 0.500 793.352 1.627 0.144 7 0.583 925.578 0.728 0.065 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 4.20 0.382 0.091 ( 0.344) 0.291 2 0.17 4.30 0.391 0.091 ( 0.352) 0.300 3 0.25 5.00 0.455 0.091 ( 0.410) 0.364 4 0.33 5.00 0.455 0.091 ( 0.410) 0.364 5 0.42 5.80 0.528 0.091 ( 0.475) 0.437 6 0.50 6.50 0.592 0.091 ( 0.532) 0.501 7 0.58 7.40 0.674 0.091 ( 0.606) 0.583 8 0.67 8.60 0.783 0.091 ( 0.704) 0.692 9 0.75 12.30 1.120 0.091 ( 1.008) 1.029 10 0.83 29.10 2.649 0.091 ( 2.384) 2.558 11 0.92 6.80 0.619 0.091 ( 0.557) 0.528 12 1.00 5.00 0.455 0.091 ( 0.410) 0.364 (Loss Rate Not Used)
Sum = 100.0 Sum = 8.0 Flood volume = Effective rainfall 0.67(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 0.5(Ac.Ft) Total soil loss = 0.09(In)
Total soil loss = 0.067(Ac.Ft)
Total rainfall = 0.76(In)
Flood volume = 21346.7 Cubic Feet
Total soil loss = 2910.2 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 14.009(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 483
Menifee Mayor and City Council
July 15, 2026
Page
1113 of 3153
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 5.0 10.0 15.0 20.0 ----------------------------------------------------------------------- 0+ 5 0.0051 0.74 VQ | | | | 0+10 0.0189 2.01 |V Q | | | | 0+15 0.0364 2.53 | V Q | | | | 0+20 0.0567 2.96 | VQ | | | | 0+25 0.0794 3.29 | Q | | | | 0+30 0.1059 3.84 | QV | | | | 0+35 0.1364 4.44 | Q |V | | | 0+40 0.1721 5.18 | Q V | | | 0+45 0.2180 6.65 | | Q V | | | 0+50 0.3018 12.17 | | | Q | | 0+55 0.3983 14.01 | | | Q | V | 1+ 0 0.4450 6.79 | | Q | | V | 1+ 5 0.4712 3.80 | Q | | | V | 1+10 0.4818 1.53 | Q | | | V| 1+15 0.4870 0.76 |Q | | | V| 1+20 0.4893 0.34 Q | | | V| 1+25 0.4899 0.09 Q | | | V| 1+30 0.4901 0.02 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 484
Menifee Mayor and City Council
July 15, 2026
Page
1114 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10A310.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
WESTERLY PARKING AREA
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.063 Hr.
Lag time = 3.78 Min.
25% of lag time = 0.95 Min.
40% of lag time = 1.51 Min.
Unit time = 5.00 Min.
Duration of storm = 3 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 0.80 7.05
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.80 15.86
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.800(In)
Area Averaged 100-Year Rainfall = 1.800(In)
Point rain (area averaged) = 1.211(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.211(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 485
Menifee Mayor and City Council
July 15, 2026
Page
1115 of 3153
8.810 93.00 0.000
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 132.225 28.626 2.542 2 0.167 264.451 48.173 4.277 3 0.250 396.676 12.339 1.096 4 0.333 528.901 5.498 0.488 5 0.417 661.127 3.009 0.267 6 0.500 793.352 1.627 0.144 7 0.583 925.578 0.728 0.065 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 1.30 0.189 0.091 ( 0.170) 0.098 2 0.17 1.30 0.189 0.091 ( 0.170) 0.098 3 0.25 1.10 0.160 0.091 ( 0.144) 0.069 4 0.33 1.50 0.218 0.091 ( 0.196) 0.127 5 0.42 1.50 0.218 0.091 ( 0.196) 0.127 6 0.50 1.80 0.262 0.091 ( 0.235) 0.171 7 0.58 1.50 0.218 0.091 ( 0.196) 0.127 8 0.67 1.80 0.262 0.091 ( 0.235) 0.171 9 0.75 1.80 0.262 0.091 ( 0.235) 0.171 10 0.83 1.50 0.218 0.091 ( 0.196) 0.127 11 0.92 1.60 0.233 0.091 ( 0.209) 0.142 12 1.00 1.80 0.262 0.091 ( 0.235) 0.171 13 1.08 2.20 0.320 0.091 ( 0.288) 0.229 14 1.17 2.20 0.320 0.091 ( 0.288) 0.229 15 1.25 2.20 0.320 0.091 ( 0.288) 0.229 16 1.33 2.00 0.291 0.091 ( 0.262) 0.200 17 1.42 2.60 0.378 0.091 ( 0.340) 0.287 18 1.50 2.70 0.392 0.091 ( 0.353) 0.301 19 1.58 2.40 0.349 0.091 ( 0.314) 0.258 20 1.67 2.70 0.392 0.091 ( 0.353) 0.301 21 1.75 3.30 0.480 0.091 ( 0.432) 0.389 22 1.83 3.10 0.451 0.091 ( 0.406) 0.360 23 1.92 2.90 0.422 0.091 ( 0.379) 0.331 24 2.00 3.00 0.436 0.091 ( 0.392) 0.345 25 2.08 3.10 0.451 0.091 ( 0.406) 0.360 26 2.17 4.20 0.611 0.091 ( 0.549) 0.520 27 2.25 5.00 0.727 0.091 ( 0.654) 0.636 28 2.33 3.50 0.509 0.091 ( 0.458) 0.418 29 2.42 6.80 0.988 0.091 ( 0.890) 0.897 30 2.50 7.30 1.061 0.091 ( 0.955) 0.970 31 2.58 8.20 1.192 0.091 ( 1.073) 1.101 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 486
Menifee Mayor and City Council
July 15, 2026
Page
1116 of 3153
32 2.67 5.90 0.858 0.091 ( 0.772) 0.767 33 2.75 2.00 0.291 0.091 ( 0.262) 0.200 34 2.83 1.80 0.262 0.091 ( 0.235) 0.171 35 2.92 1.80 0.262 0.091 ( 0.235) 0.171 36 3.00 0.60 0.087 ( 0.091) 0.078 0.009 (Loss Rate Not Used)
Sum = 100.0 Sum = 11.3 Flood volume = Effective rainfall 0.94(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 0.7(Ac.Ft) Total soil loss = 0.27(In)
Total soil loss = 0.200(Ac.Ft)
Total rainfall = 1.21(In)
Flood volume = 30042.4 Cubic Feet
Total soil loss = 8697.3 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 8.408(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0017 0.25 Q | | | | 0+10 0.0063 0.67 V Q | | | | 0+15 0.0112 0.70 V Q | | | | 0+20 0.0165 0.77 V Q | | | | 0+25 0.0235 1.02 |V Q | | | | 0+30 0.0317 1.19 |V Q | | | | 0+35 0.0406 1.29 | V Q | | | | 0+40 0.0494 1.28 | V Q | | | | 0+45 0.0593 1.44 | V Q | | | | 0+50 0.0688 1.37 | V Q | | | | 0+55 0.0773 1.24 | Q | | | | 1+ 0 0.0866 1.34 | Q | | | | 1+ 5 0.0976 1.61 | VQ | | | | 1+10 0.1106 1.89 | VQ | | | | 1+15 0.1241 1.96 | Q | | | | 1+20 0.1374 1.92 | Q | | | | 1+25 0.1514 2.04 | Q | | | | 1+30 0.1682 2.43 | Q| | | | 1+35 0.1852 2.47 | QV | | | 1+40 0.2020 2.44 | Q|V | | | 1+45 0.2215 2.83 | |QV | | | 1+50 0.2433 3.17 | | Q V | | | 1+55 0.2645 3.08 | | Q V | | | 2+ 0 0.2853 3.01 | | Q V | | | 2+ 5 0.3066 3.09 | | Q V | | | 2+10 0.3312 3.57 | | Q V| | | 2+15 0.3627 4.57 | | Q |V | | 2+20 0.3950 4.69 | | Q | V | | 2+25 0.4307 5.19 | | Q V | | 2+30 0.4809 7.29 | | | V Q| | 2+35 0.5388 8.41 | | | |V Q | 2+40 0.5967 8.40 | | | | QV | 2+45 0.6367 5.81 | | | Q | V | 2+50 0.6579 3.08 | | Q | | V | 2+55 0.6734 2.25 | Q| | | V| 3+ 0 0.6835 1.46 | Q | | | V| 3+ 5 0.6872 0.54 | Q | | | V| 3+10 0.6887 0.22 Q | | | V| 3+15 0.6893 0.09 Q | | | V| 3+20 0.6896 0.04 Q | | | V| 3+25 0.6897 0.01 Q | | | V| 3+30 0.6897 0.00 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 487
Menifee Mayor and City Council
July 15, 2026
Page
1117 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10A610.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
WESTERLY PARKING AREA
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.063 Hr.
Lag time = 3.78 Min.
25% of lag time = 0.95 Min.
40% of lag time = 1.51 Min.
Unit time = 5.00 Min.
Duration of storm = 6 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.00 8.81
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 2.50 22.03
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.000(In)
Area Averaged 100-Year Rainfall = 2.500(In)
Point rain (area averaged) = 1.617(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.617(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 488
Menifee Mayor and City Council
July 15, 2026
Page
1118 of 3153
8.810 93.00 0.000
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 132.225 28.626 2.542 2 0.167 264.451 48.173 4.277 3 0.250 396.676 12.339 1.096 4 0.333 528.901 5.498 0.488 5 0.417 661.127 3.009 0.267 6 0.500 793.352 1.627 0.144 7 0.583 925.578 0.728 0.065 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.50 0.097 ( 0.091) 0.087 0.010 2 0.17 0.60 0.116 0.091 ( 0.105) 0.025 3 0.25 0.60 0.116 0.091 ( 0.105) 0.025 4 0.33 0.60 0.116 0.091 ( 0.105) 0.025 5 0.42 0.60 0.116 0.091 ( 0.105) 0.025 6 0.50 0.70 0.136 0.091 ( 0.122) 0.045 7 0.58 0.70 0.136 0.091 ( 0.122) 0.045 8 0.67 0.70 0.136 0.091 ( 0.122) 0.045 9 0.75 0.70 0.136 0.091 ( 0.122) 0.045 10 0.83 0.70 0.136 0.091 ( 0.122) 0.045 11 0.92 0.70 0.136 0.091 ( 0.122) 0.045 12 1.00 0.80 0.155 0.091 ( 0.140) 0.064 13 1.08 0.80 0.155 0.091 ( 0.140) 0.064 14 1.17 0.80 0.155 0.091 ( 0.140) 0.064 15 1.25 0.80 0.155 0.091 ( 0.140) 0.064 16 1.33 0.80 0.155 0.091 ( 0.140) 0.064 17 1.42 0.80 0.155 0.091 ( 0.140) 0.064 18 1.50 0.80 0.155 0.091 ( 0.140) 0.064 19 1.58 0.80 0.155 0.091 ( 0.140) 0.064 20 1.67 0.80 0.155 0.091 ( 0.140) 0.064 21 1.75 0.80 0.155 0.091 ( 0.140) 0.064 22 1.83 0.80 0.155 0.091 ( 0.140) 0.064 23 1.92 0.80 0.155 0.091 ( 0.140) 0.064 24 2.00 0.90 0.175 0.091 ( 0.157) 0.084 25 2.08 0.80 0.155 0.091 ( 0.140) 0.064 26 2.17 0.90 0.175 0.091 ( 0.157) 0.084 27 2.25 0.90 0.175 0.091 ( 0.157) 0.084 28 2.33 0.90 0.175 0.091 ( 0.157) 0.084 29 2.42 0.90 0.175 0.091 ( 0.157) 0.084 30 2.50 0.90 0.175 0.091 ( 0.157) 0.084 31 2.58 0.90 0.175 0.091 ( 0.157) 0.084 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 489
Menifee Mayor and City Council
July 15, 2026
Page
1119 of 3153
32 2.67 0.90 0.175 0.091 ( 0.157) 0.084 33 2.75 1.00 0.194 0.091 ( 0.175) 0.103 34 2.83 1.00 0.194 0.091 ( 0.175) 0.103 35 2.92 1.00 0.194 0.091 ( 0.175) 0.103 36 3.00 1.00 0.194 0.091 ( 0.175) 0.103 37 3.08 1.00 0.194 0.091 ( 0.175) 0.103 38 3.17 1.10 0.213 0.091 ( 0.192) 0.122 39 3.25 1.10 0.213 0.091 ( 0.192) 0.122 40 3.33 1.10 0.213 0.091 ( 0.192) 0.122 41 3.42 1.20 0.233 0.091 ( 0.210) 0.142 42 3.50 1.30 0.252 0.091 ( 0.227) 0.161 43 3.58 1.40 0.272 0.091 ( 0.244) 0.181 44 3.67 1.40 0.272 0.091 ( 0.244) 0.181 45 3.75 1.50 0.291 0.091 ( 0.262) 0.200 46 3.83 1.50 0.291 0.091 ( 0.262) 0.200 47 3.92 1.60 0.310 0.091 ( 0.279) 0.219 48 4.00 1.60 0.310 0.091 ( 0.279) 0.219 49 4.08 1.70 0.330 0.091 ( 0.297) 0.239 50 4.17 1.80 0.349 0.091 ( 0.314) 0.258 51 4.25 1.90 0.369 0.091 ( 0.332) 0.278 52 4.33 2.00 0.388 0.091 ( 0.349) 0.297 53 4.42 2.10 0.407 0.091 ( 0.367) 0.316 54 4.50 2.10 0.407 0.091 ( 0.367) 0.316 55 4.58 2.20 0.427 0.091 ( 0.384) 0.336 56 4.67 2.30 0.446 0.091 ( 0.402) 0.355 57 4.75 2.40 0.466 0.091 ( 0.419) 0.375 58 4.83 2.40 0.466 0.091 ( 0.419) 0.375 59 4.92 2.50 0.485 0.091 ( 0.437) 0.394 60 5.00 2.60 0.505 0.091 ( 0.454) 0.414 61 5.08 3.10 0.602 0.091 ( 0.541) 0.511 62 5.17 3.60 0.699 0.091 ( 0.629) 0.608 63 5.25 3.90 0.757 0.091 ( 0.681) 0.666 64 5.33 4.20 0.815 0.091 ( 0.733) 0.724 65 5.42 4.70 0.912 0.091 ( 0.821) 0.821 66 5.50 5.60 1.087 0.091 ( 0.978) 0.996 67 5.58 1.90 0.369 0.091 ( 0.332) 0.278 68 5.67 0.90 0.175 0.091 ( 0.157) 0.084 69 5.75 0.60 0.116 0.091 ( 0.105) 0.025 70 5.83 0.50 0.097 ( 0.091) 0.087 0.010 71 5.92 0.30 0.058 ( 0.091) 0.052 0.006 72 6.00 0.20 0.039 ( 0.091) 0.035 0.004 (Loss Rate Not Used)
Sum = 100.0 Sum = 13.0 Flood volume = Effective rainfall 1.08(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 0.8(Ac.Ft) Total soil loss = 0.54(In)
Total soil loss = 0.395(Ac.Ft)
Total rainfall = 1.62(In)
Flood volume = 34524.8 Cubic Feet
Total soil loss = 17189.3 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 7.427(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 6 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0002 0.02 Q | | | | 0+10 0.0009 0.11 Q | | | | 0+15 0.0022 0.18 Q | | | | 0+20 0.0036 0.21 Q | | | | 0+25 0.0051 0.22 Q | | | | 0+30 0.0069 0.27 VQ | | | | 0+35 0.0094 0.36 VQ | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 490
Menifee Mayor and City Council
July 15, 2026
Page
1120 of 3153
0+40 0.0120 0.38 VQ | | | | 0+45 0.0147 0.39 VQ | | | | 0+50 0.0174 0.39 VQ | | | | 0+55 0.0202 0.40 |Q | | | | 1+ 0 0.0232 0.45 |Q | | | | 1+ 5 0.0269 0.53 |VQ | | | | 1+10 0.0307 0.55 |VQ | | | | 1+15 0.0346 0.56 |VQ | | | | 1+20 0.0385 0.57 |VQ | | | | 1+25 0.0424 0.57 | Q | | | | 1+30 0.0463 0.57 | Q | | | | 1+35 0.0502 0.57 | Q | | | | 1+40 0.0542 0.57 | Q | | | | 1+45 0.0581 0.57 | Q | | | | 1+50 0.0620 0.57 | QV | | | | 1+55 0.0660 0.57 | QV | | | | 2+ 0 0.0702 0.62 | QV | | | | 2+ 5 0.0747 0.65 | QV | | | | 2+10 0.0791 0.64 | QV | | | | 2+15 0.0841 0.71 | Q V | | | | 2+20 0.0891 0.73 | Q V | | | | 2+25 0.0942 0.74 | Q V | | | | 2+30 0.0993 0.74 | Q V | | | | 2+35 0.1044 0.74 | Q V | | | | 2+40 0.1095 0.74 | Q V | | | | 2+45 0.1149 0.79 | Q V | | | | 2+50 0.1210 0.88 | Q V | | | | 2+55 0.1271 0.90 | Q V | | | | 3+ 0 0.1334 0.91 | Q V | | | | 3+ 5 0.1397 0.91 | Q V | | | | 3+10 0.1463 0.96 | Q V | | | | 3+15 0.1535 1.05 | Q V | | | | 3+20 0.1609 1.07 | Q V | | | | 3+25 0.1686 1.13 | Q V | | | | 3+30 0.1774 1.27 | Q V | | | | 3+35 0.1871 1.42 | Q V| | | | 3+40 0.1977 1.54 | Q V| | | | 3+45 0.2089 1.62 | Q V | | | 3+50 0.2208 1.72 | Q |V | | | 3+55 0.2332 1.80 | Q |V | | | 4+ 0 0.2463 1.90 | Q | V | | | 4+ 5 0.2599 1.98 | Q | V | | | 4+10 0.2745 2.12 | Q | V | | | 4+15 0.2902 2.28 | Q| V | | | 4+20 0.3070 2.45 | Q| V | | | 4+25 0.3251 2.62 | Q V | | | 4+30 0.3439 2.74 | Q V | | | 4+35 0.3634 2.83 | |Q V | | | 4+40 0.3839 2.98 | |Q V| | | 4+45 0.4055 3.14 | | Q V | | 4+50 0.4280 3.26 | | Q |V | | 4+55 0.4510 3.35 | | Q | V | | 5+ 0 0.4751 3.50 | | Q | V | | 5+ 5 0.5017 3.86 | | Q | V | | 5+10 0.5330 4.55 | | Q | V | | 5+15 0.5691 5.24 | | Q V | | 5+20 0.6090 5.80 | | | Q V | 5+25 0.6534 6.43 | | | Q | V | 5+30 0.7045 7.43 | | | Q| V | 5+35 0.7494 6.52 | | | Q | V | 5+40 0.7716 3.22 | | Q | | V | 5+45 0.7825 1.58 | Q | | | V| 5+50 0.7879 0.79 | Q | | | V| 5+55 0.7907 0.40 |Q | | | V| 6+ 0 0.7919 0.18 Q | | | V| 6+ 5 0.7924 0.06 Q | | | V| 6+10 0.7925 0.02 Q | | | V| 6+15 0.7926 0.01 Q | | | V| 6+20 0.7926 0.00 Q | | | V| Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 491
Menifee Mayor and City Council
July 15, 2026
Page
1121 of 3153
6+25 0.7926 0.00 Q | | | V| 6+30 0.7926 0.00 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 492
Menifee Mayor and City Council
July 15, 2026
Page
1122 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100EX10A2410.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
EXISTING CONDITIONS
WESTERLY PARKING AREA
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.040
Lag time = 0.063 Hr.
Lag time = 3.78 Min.
25% of lag time = 0.95 Min.
40% of lag time = 1.51 Min.
Unit time = 5.00 Min.
Duration of storm = 24 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.60 14.10
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 4.00 35.24
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.600(In)
Area Averaged 100-Year Rainfall = 4.000(In)
Point rain (area averaged) = 2.587(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 2.587(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 493
Menifee Mayor and City Council
July 15, 2026
Page
1123 of 3153
8.810 93.00 0.000
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
93.0 93.0 0.091 0.000 0.091 1.000 0.091 Sum (F) = 0.091
Area averaged mean soil loss (F) (In/Hr) = 0.091
Minimum soil loss rate ((In/Hr)) = 0.045
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.900
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 132.225 28.626 2.542 2 0.167 264.451 48.173 4.277 3 0.250 396.676 12.339 1.096 4 0.333 528.901 5.498 0.488 5 0.417 661.127 3.009 0.267 6 0.500 793.352 1.627 0.144 7 0.583 925.578 0.728 0.065 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.07 0.021 ( 0.161) 0.019 0.002 2 0.17 0.07 0.021 ( 0.161) 0.019 0.002 3 0.25 0.07 0.021 ( 0.160) 0.019 0.002 4 0.33 0.10 0.031 ( 0.159) 0.028 0.003 5 0.42 0.10 0.031 ( 0.159) 0.028 0.003 6 0.50 0.10 0.031 ( 0.158) 0.028 0.003 7 0.58 0.10 0.031 ( 0.158) 0.028 0.003 8 0.67 0.10 0.031 ( 0.157) 0.028 0.003 9 0.75 0.10 0.031 ( 0.156) 0.028 0.003 10 0.83 0.13 0.041 ( 0.156) 0.037 0.004 11 0.92 0.13 0.041 ( 0.155) 0.037 0.004 12 1.00 0.13 0.041 ( 0.155) 0.037 0.004 13 1.08 0.10 0.031 ( 0.154) 0.028 0.003 14 1.17 0.10 0.031 ( 0.153) 0.028 0.003 15 1.25 0.10 0.031 ( 0.153) 0.028 0.003 16 1.33 0.10 0.031 ( 0.152) 0.028 0.003 17 1.42 0.10 0.031 ( 0.151) 0.028 0.003 18 1.50 0.10 0.031 ( 0.151) 0.028 0.003 19 1.58 0.10 0.031 ( 0.150) 0.028 0.003 20 1.67 0.10 0.031 ( 0.150) 0.028 0.003 21 1.75 0.10 0.031 ( 0.149) 0.028 0.003 22 1.83 0.13 0.041 ( 0.148) 0.037 0.004 23 1.92 0.13 0.041 ( 0.148) 0.037 0.004 24 2.00 0.13 0.041 ( 0.147) 0.037 0.004 25 2.08 0.13 0.041 ( 0.147) 0.037 0.004 26 2.17 0.13 0.041 ( 0.146) 0.037 0.004 27 2.25 0.13 0.041 ( 0.145) 0.037 0.004 28 2.33 0.13 0.041 ( 0.145) 0.037 0.004 29 2.42 0.13 0.041 ( 0.144) 0.037 0.004 30 2.50 0.13 0.041 ( 0.144) 0.037 0.004 31 2.58 0.17 0.052 ( 0.143) 0.047 0.005 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 494
Menifee Mayor and City Council
July 15, 2026
Page
1124 of 3153
32 2.67 0.17 0.052 ( 0.143) 0.047 0.005 33 2.75 0.17 0.052 ( 0.142) 0.047 0.005 34 2.83 0.17 0.052 ( 0.141) 0.047 0.005 35 2.92 0.17 0.052 ( 0.141) 0.047 0.005 36 3.00 0.17 0.052 ( 0.140) 0.047 0.005 37 3.08 0.17 0.052 ( 0.140) 0.047 0.005 38 3.17 0.17 0.052 ( 0.139) 0.047 0.005 39 3.25 0.17 0.052 ( 0.138) 0.047 0.005 40 3.33 0.17 0.052 ( 0.138) 0.047 0.005 41 3.42 0.17 0.052 ( 0.137) 0.047 0.005 42 3.50 0.17 0.052 ( 0.137) 0.047 0.005 43 3.58 0.17 0.052 ( 0.136) 0.047 0.005 44 3.67 0.17 0.052 ( 0.136) 0.047 0.005 45 3.75 0.17 0.052 ( 0.135) 0.047 0.005 46 3.83 0.20 0.062 ( 0.134) 0.056 0.006 47 3.92 0.20 0.062 ( 0.134) 0.056 0.006 48 4.00 0.20 0.062 ( 0.133) 0.056 0.006 49 4.08 0.20 0.062 ( 0.133) 0.056 0.006 50 4.17 0.20 0.062 ( 0.132) 0.056 0.006 51 4.25 0.20 0.062 ( 0.132) 0.056 0.006 52 4.33 0.23 0.072 ( 0.131) 0.065 0.007 53 4.42 0.23 0.072 ( 0.131) 0.065 0.007 54 4.50 0.23 0.072 ( 0.130) 0.065 0.007 55 4.58 0.23 0.072 ( 0.129) 0.065 0.007 56 4.67 0.23 0.072 ( 0.129) 0.065 0.007 57 4.75 0.23 0.072 ( 0.128) 0.065 0.007 58 4.83 0.27 0.083 ( 0.128) 0.075 0.008 59 4.92 0.27 0.083 ( 0.127) 0.075 0.008 60 5.00 0.27 0.083 ( 0.127) 0.075 0.008 61 5.08 0.20 0.062 ( 0.126) 0.056 0.006 62 5.17 0.20 0.062 ( 0.126) 0.056 0.006 63 5.25 0.20 0.062 ( 0.125) 0.056 0.006 64 5.33 0.23 0.072 ( 0.124) 0.065 0.007 65 5.42 0.23 0.072 ( 0.124) 0.065 0.007 66 5.50 0.23 0.072 ( 0.123) 0.065 0.007 67 5.58 0.27 0.083 ( 0.123) 0.075 0.008 68 5.67 0.27 0.083 ( 0.122) 0.075 0.008 69 5.75 0.27 0.083 ( 0.122) 0.075 0.008 70 5.83 0.27 0.083 ( 0.121) 0.075 0.008 71 5.92 0.27 0.083 ( 0.121) 0.075 0.008 72 6.00 0.27 0.083 ( 0.120) 0.075 0.008 73 6.08 0.30 0.093 ( 0.120) 0.084 0.009 74 6.17 0.30 0.093 ( 0.119) 0.084 0.009 75 6.25 0.30 0.093 ( 0.119) 0.084 0.009 76 6.33 0.30 0.093 ( 0.118) 0.084 0.009 77 6.42 0.30 0.093 ( 0.117) 0.084 0.009 78 6.50 0.30 0.093 ( 0.117) 0.084 0.009 79 6.58 0.33 0.103 ( 0.116) 0.093 0.010 80 6.67 0.33 0.103 ( 0.116) 0.093 0.010 81 6.75 0.33 0.103 ( 0.115) 0.093 0.010 82 6.83 0.33 0.103 ( 0.115) 0.093 0.010 83 6.92 0.33 0.103 ( 0.114) 0.093 0.010 84 7.00 0.33 0.103 ( 0.114) 0.093 0.010 85 7.08 0.33 0.103 ( 0.113) 0.093 0.010 86 7.17 0.33 0.103 ( 0.113) 0.093 0.010 87 7.25 0.33 0.103 ( 0.112) 0.093 0.010 88 7.33 0.37 0.114 ( 0.112) 0.102 0.011 89 7.42 0.37 0.114 ( 0.111) 0.102 0.011 90 7.50 0.37 0.114 ( 0.111) 0.102 0.011 91 7.58 0.40 0.124 0.110 ( 0.112) 0.014 92 7.67 0.40 0.124 0.110 ( 0.112) 0.014 93 7.75 0.40 0.124 0.109 ( 0.112) 0.015 94 7.83 0.43 0.135 0.109 ( 0.121) 0.026 95 7.92 0.43 0.135 0.108 ( 0.121) 0.026 96 8.00 0.43 0.135 0.108 ( 0.121) 0.027 97 8.08 0.50 0.155 0.107 ( 0.140) 0.048 98 8.17 0.50 0.155 0.107 ( 0.140) 0.049 99 8.25 0.50 0.155 0.106 ( 0.140) 0.049 100 8.33 0.50 0.155 0.106 ( 0.140) 0.050 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 495
Menifee Mayor and City Council
July 15, 2026
Page
1125 of 3153
101 8.42 0.50 0.155 0.105 ( 0.140) 0.050 102 8.50 0.50 0.155 0.105 ( 0.140) 0.051 103 8.58 0.53 0.166 0.104 ( 0.149) 0.061 104 8.67 0.53 0.166 0.104 ( 0.149) 0.062 105 8.75 0.53 0.166 0.103 ( 0.149) 0.062 106 8.83 0.57 0.176 0.103 ( 0.158) 0.073 107 8.92 0.57 0.176 0.102 ( 0.158) 0.074 108 9.00 0.57 0.176 0.102 ( 0.158) 0.074 109 9.08 0.63 0.197 0.101 ( 0.177) 0.095 110 9.17 0.63 0.197 0.101 ( 0.177) 0.096 111 9.25 0.63 0.197 0.100 ( 0.177) 0.096 112 9.33 0.67 0.207 0.100 ( 0.186) 0.107 113 9.42 0.67 0.207 0.099 ( 0.186) 0.108 114 9.50 0.67 0.207 0.099 ( 0.186) 0.108 115 9.58 0.70 0.217 0.098 ( 0.196) 0.119 116 9.67 0.70 0.217 0.098 ( 0.196) 0.119 117 9.75 0.70 0.217 0.097 ( 0.196) 0.120 118 9.83 0.73 0.228 0.097 ( 0.205) 0.131 119 9.92 0.73 0.228 0.097 ( 0.205) 0.131 120 10.00 0.73 0.228 0.096 ( 0.205) 0.132 121 10.08 0.50 0.155 0.096 ( 0.140) 0.060 122 10.17 0.50 0.155 0.095 ( 0.140) 0.060 123 10.25 0.50 0.155 0.095 ( 0.140) 0.061 124 10.33 0.50 0.155 0.094 ( 0.140) 0.061 125 10.42 0.50 0.155 0.094 ( 0.140) 0.061 126 10.50 0.50 0.155 0.093 ( 0.140) 0.062 127 10.58 0.67 0.207 0.093 ( 0.186) 0.114 128 10.67 0.67 0.207 0.092 ( 0.186) 0.115 129 10.75 0.67 0.207 0.092 ( 0.186) 0.115 130 10.83 0.67 0.207 0.092 ( 0.186) 0.115 131 10.92 0.67 0.207 0.091 ( 0.186) 0.116 132 11.00 0.67 0.207 0.091 ( 0.186) 0.116 133 11.08 0.63 0.197 0.090 ( 0.177) 0.106 134 11.17 0.63 0.197 0.090 ( 0.177) 0.107 135 11.25 0.63 0.197 0.089 ( 0.177) 0.107 136 11.33 0.63 0.197 0.089 ( 0.177) 0.108 137 11.42 0.63 0.197 0.088 ( 0.177) 0.108 138 11.50 0.63 0.197 0.088 ( 0.177) 0.109 139 11.58 0.57 0.176 0.088 ( 0.158) 0.088 140 11.67 0.57 0.176 0.087 ( 0.158) 0.089 141 11.75 0.57 0.176 0.087 ( 0.158) 0.089 142 11.83 0.60 0.186 0.086 ( 0.168) 0.100 143 11.92 0.60 0.186 0.086 ( 0.168) 0.100 144 12.00 0.60 0.186 0.085 ( 0.168) 0.101 145 12.08 0.83 0.259 0.085 ( 0.233) 0.174 146 12.17 0.83 0.259 0.085 ( 0.233) 0.174 147 12.25 0.83 0.259 0.084 ( 0.233) 0.175 148 12.33 0.87 0.269 0.084 ( 0.242) 0.185 149 12.42 0.87 0.269 0.083 ( 0.242) 0.186 150 12.50 0.87 0.269 0.083 ( 0.242) 0.186 151 12.58 0.93 0.290 0.082 ( 0.261) 0.207 152 12.67 0.93 0.290 0.082 ( 0.261) 0.208 153 12.75 0.93 0.290 0.082 ( 0.261) 0.208 154 12.83 0.97 0.300 0.081 ( 0.270) 0.219 155 12.92 0.97 0.300 0.081 ( 0.270) 0.219 156 13.00 0.97 0.300 0.080 ( 0.270) 0.220 157 13.08 1.13 0.352 0.080 ( 0.317) 0.272 158 13.17 1.13 0.352 0.080 ( 0.317) 0.272 159 13.25 1.13 0.352 0.079 ( 0.317) 0.273 160 13.33 1.13 0.352 0.079 ( 0.317) 0.273 161 13.42 1.13 0.352 0.078 ( 0.317) 0.274 162 13.50 1.13 0.352 0.078 ( 0.317) 0.274 163 13.58 0.77 0.238 0.078 ( 0.214) 0.160 164 13.67 0.77 0.238 0.077 ( 0.214) 0.161 165 13.75 0.77 0.238 0.077 ( 0.214) 0.161 166 13.83 0.77 0.238 0.076 ( 0.214) 0.162 167 13.92 0.77 0.238 0.076 ( 0.214) 0.162 168 14.00 0.77 0.238 0.076 ( 0.214) 0.162 169 14.08 0.90 0.279 0.075 ( 0.251) 0.204 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 496
Menifee Mayor and City Council
July 15, 2026
Page
1126 of 3153
170 14.17 0.90 0.279 0.075 ( 0.251) 0.205 171 14.25 0.90 0.279 0.074 ( 0.251) 0.205 172 14.33 0.87 0.269 0.074 ( 0.242) 0.195 173 14.42 0.87 0.269 0.074 ( 0.242) 0.195 174 14.50 0.87 0.269 0.073 ( 0.242) 0.196 175 14.58 0.87 0.269 0.073 ( 0.242) 0.196 176 14.67 0.87 0.269 0.073 ( 0.242) 0.197 177 14.75 0.87 0.269 0.072 ( 0.242) 0.197 178 14.83 0.83 0.259 0.072 ( 0.233) 0.187 179 14.92 0.83 0.259 0.071 ( 0.233) 0.187 180 15.00 0.83 0.259 0.071 ( 0.233) 0.188 181 15.08 0.80 0.248 0.071 ( 0.224) 0.178 182 15.17 0.80 0.248 0.070 ( 0.224) 0.178 183 15.25 0.80 0.248 0.070 ( 0.224) 0.178 184 15.33 0.77 0.238 0.070 ( 0.214) 0.168 185 15.42 0.77 0.238 0.069 ( 0.214) 0.169 186 15.50 0.77 0.238 0.069 ( 0.214) 0.169 187 15.58 0.63 0.197 0.069 ( 0.177) 0.128 188 15.67 0.63 0.197 0.068 ( 0.177) 0.128 189 15.75 0.63 0.197 0.068 ( 0.177) 0.129 190 15.83 0.63 0.197 0.068 ( 0.177) 0.129 191 15.92 0.63 0.197 0.067 ( 0.177) 0.129 192 16.00 0.63 0.197 0.067 ( 0.177) 0.130 193 16.08 0.13 0.041 ( 0.066) 0.037 0.004 194 16.17 0.13 0.041 ( 0.066) 0.037 0.004 195 16.25 0.13 0.041 ( 0.066) 0.037 0.004 196 16.33 0.13 0.041 ( 0.065) 0.037 0.004 197 16.42 0.13 0.041 ( 0.065) 0.037 0.004 198 16.50 0.13 0.041 ( 0.065) 0.037 0.004 199 16.58 0.10 0.031 ( 0.064) 0.028 0.003 200 16.67 0.10 0.031 ( 0.064) 0.028 0.003 201 16.75 0.10 0.031 ( 0.064) 0.028 0.003 202 16.83 0.10 0.031 ( 0.063) 0.028 0.003 203 16.92 0.10 0.031 ( 0.063) 0.028 0.003 204 17.00 0.10 0.031 ( 0.063) 0.028 0.003 205 17.08 0.17 0.052 ( 0.063) 0.047 0.005 206 17.17 0.17 0.052 ( 0.062) 0.047 0.005 207 17.25 0.17 0.052 ( 0.062) 0.047 0.005 208 17.33 0.17 0.052 ( 0.062) 0.047 0.005 209 17.42 0.17 0.052 ( 0.061) 0.047 0.005 210 17.50 0.17 0.052 ( 0.061) 0.047 0.005 211 17.58 0.17 0.052 ( 0.061) 0.047 0.005 212 17.67 0.17 0.052 ( 0.060) 0.047 0.005 213 17.75 0.17 0.052 ( 0.060) 0.047 0.005 214 17.83 0.13 0.041 ( 0.060) 0.037 0.004 215 17.92 0.13 0.041 ( 0.059) 0.037 0.004 216 18.00 0.13 0.041 ( 0.059) 0.037 0.004 217 18.08 0.13 0.041 ( 0.059) 0.037 0.004 218 18.17 0.13 0.041 ( 0.059) 0.037 0.004 219 18.25 0.13 0.041 ( 0.058) 0.037 0.004 220 18.33 0.13 0.041 ( 0.058) 0.037 0.004 221 18.42 0.13 0.041 ( 0.058) 0.037 0.004 222 18.50 0.13 0.041 ( 0.057) 0.037 0.004 223 18.58 0.10 0.031 ( 0.057) 0.028 0.003 224 18.67 0.10 0.031 ( 0.057) 0.028 0.003 225 18.75 0.10 0.031 ( 0.057) 0.028 0.003 226 18.83 0.07 0.021 ( 0.056) 0.019 0.002 227 18.92 0.07 0.021 ( 0.056) 0.019 0.002 228 19.00 0.07 0.021 ( 0.056) 0.019 0.002 229 19.08 0.10 0.031 ( 0.056) 0.028 0.003 230 19.17 0.10 0.031 ( 0.055) 0.028 0.003 231 19.25 0.10 0.031 ( 0.055) 0.028 0.003 232 19.33 0.13 0.041 ( 0.055) 0.037 0.004 233 19.42 0.13 0.041 ( 0.055) 0.037 0.004 234 19.50 0.13 0.041 ( 0.054) 0.037 0.004 235 19.58 0.10 0.031 ( 0.054) 0.028 0.003 236 19.67 0.10 0.031 ( 0.054) 0.028 0.003 237 19.75 0.10 0.031 ( 0.054) 0.028 0.003 238 19.83 0.07 0.021 ( 0.053) 0.019 0.002 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 497
Menifee Mayor and City Council
July 15, 2026
Page
1127 of 3153
239 19.92 0.07 0.021 ( 0.053) 0.019 0.002 240 20.00 0.07 0.021 ( 0.053) 0.019 0.002 241 20.08 0.10 0.031 ( 0.053) 0.028 0.003 242 20.17 0.10 0.031 ( 0.052) 0.028 0.003 243 20.25 0.10 0.031 ( 0.052) 0.028 0.003 244 20.33 0.10 0.031 ( 0.052) 0.028 0.003 245 20.42 0.10 0.031 ( 0.052) 0.028 0.003 246 20.50 0.10 0.031 ( 0.051) 0.028 0.003 247 20.58 0.10 0.031 ( 0.051) 0.028 0.003 248 20.67 0.10 0.031 ( 0.051) 0.028 0.003 249 20.75 0.10 0.031 ( 0.051) 0.028 0.003 250 20.83 0.07 0.021 ( 0.051) 0.019 0.002 251 20.92 0.07 0.021 ( 0.050) 0.019 0.002 252 21.00 0.07 0.021 ( 0.050) 0.019 0.002 253 21.08 0.10 0.031 ( 0.050) 0.028 0.003 254 21.17 0.10 0.031 ( 0.050) 0.028 0.003 255 21.25 0.10 0.031 ( 0.050) 0.028 0.003 256 21.33 0.07 0.021 ( 0.049) 0.019 0.002 257 21.42 0.07 0.021 ( 0.049) 0.019 0.002 258 21.50 0.07 0.021 ( 0.049) 0.019 0.002 259 21.58 0.10 0.031 ( 0.049) 0.028 0.003 260 21.67 0.10 0.031 ( 0.049) 0.028 0.003 261 21.75 0.10 0.031 ( 0.049) 0.028 0.003 262 21.83 0.07 0.021 ( 0.048) 0.019 0.002 263 21.92 0.07 0.021 ( 0.048) 0.019 0.002 264 22.00 0.07 0.021 ( 0.048) 0.019 0.002 265 22.08 0.10 0.031 ( 0.048) 0.028 0.003 266 22.17 0.10 0.031 ( 0.048) 0.028 0.003 267 22.25 0.10 0.031 ( 0.048) 0.028 0.003 268 22.33 0.07 0.021 ( 0.047) 0.019 0.002 269 22.42 0.07 0.021 ( 0.047) 0.019 0.002 270 22.50 0.07 0.021 ( 0.047) 0.019 0.002 271 22.58 0.07 0.021 ( 0.047) 0.019 0.002 272 22.67 0.07 0.021 ( 0.047) 0.019 0.002 273 22.75 0.07 0.021 ( 0.047) 0.019 0.002 274 22.83 0.07 0.021 ( 0.047) 0.019 0.002 275 22.92 0.07 0.021 ( 0.047) 0.019 0.002 276 23.00 0.07 0.021 ( 0.046) 0.019 0.002 277 23.08 0.07 0.021 ( 0.046) 0.019 0.002 278 23.17 0.07 0.021 ( 0.046) 0.019 0.002 279 23.25 0.07 0.021 ( 0.046) 0.019 0.002 280 23.33 0.07 0.021 ( 0.046) 0.019 0.002 281 23.42 0.07 0.021 ( 0.046) 0.019 0.002 282 23.50 0.07 0.021 ( 0.046) 0.019 0.002 283 23.58 0.07 0.021 ( 0.046) 0.019 0.002 284 23.67 0.07 0.021 ( 0.046) 0.019 0.002 285 23.75 0.07 0.021 ( 0.046) 0.019 0.002 286 23.83 0.07 0.021 ( 0.046) 0.019 0.002 287 23.92 0.07 0.021 ( 0.046) 0.019 0.002 288 24.00 0.07 0.021 ( 0.046) 0.019 0.002 (Loss Rate Not Used)
Sum = 100.0 Sum = 14.4 Flood volume = Effective rainfall 1.20(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 0.9(Ac.Ft) Total soil loss = 1.38(In)
Total soil loss = 1.016(Ac.Ft)
Total rainfall = 2.59(In)
Flood volume = 38499.8 Cubic Feet
Total soil loss = 44243.9 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 2.426(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 498
Menifee Mayor and City Council
July 15, 2026
Page
1128 of 3153
Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0000 0.01 Q | | | | 0+10 0.0001 0.01 Q | | | | 0+15 0.0002 0.02 Q | | | | 0+20 0.0004 0.02 Q | | | | 0+25 0.0006 0.03 Q | | | | 0+30 0.0007 0.03 Q | | | | 0+35 0.0009 0.03 Q | | | | 0+40 0.0011 0.03 Q | | | | 0+45 0.0013 0.03 Q | | | | 0+50 0.0015 0.03 Q | | | | 0+55 0.0017 0.03 Q | | | | 1+ 0 0.0020 0.04 Q | | | | 1+ 5 0.0022 0.03 Q | | | | 1+10 0.0024 0.03 Q | | | | 1+15 0.0026 0.03 Q | | | | 1+20 0.0028 0.03 Q | | | | 1+25 0.0030 0.03 Q | | | | 1+30 0.0032 0.03 Q | | | | 1+35 0.0034 0.03 Q | | | | 1+40 0.0036 0.03 Q | | | | 1+45 0.0038 0.03 Q | | | | 1+50 0.0040 0.03 Q | | | | 1+55 0.0042 0.03 Q | | | | 2+ 0 0.0045 0.04 Q | | | | 2+ 5 0.0047 0.04 Q | | | | 2+10 0.0050 0.04 Q | | | | 2+15 0.0052 0.04 Q | | | | 2+20 0.0055 0.04 Q | | | | 2+25 0.0057 0.04 Q | | | | 2+30 0.0060 0.04 Q | | | | 2+35 0.0063 0.04 Q | | | | 2+40 0.0066 0.04 Q | | | | 2+45 0.0069 0.04 Q | | | | 2+50 0.0072 0.05 Q | | | | 2+55 0.0075 0.05 Q | | | | 3+ 0 0.0078 0.05 Q | | | | 3+ 5 0.0081 0.05 Q | | | | 3+10 0.0084 0.05 Q | | | | 3+15 0.0088 0.05 Q | | | | 3+20 0.0091 0.05 Q | | | | 3+25 0.0094 0.05 Q | | | | 3+30 0.0097 0.05 Q | | | | 3+35 0.0100 0.05 Q | | | | 3+40 0.0103 0.05 Q | | | | 3+45 0.0107 0.05 Q | | | | 3+50 0.0110 0.05 Q | | | | 3+55 0.0114 0.05 Q | | | | 4+ 0 0.0117 0.05 Q | | | | 4+ 5 0.0121 0.05 Q | | | | 4+10 0.0125 0.05 Q | | | | 4+15 0.0129 0.06 Q | | | | 4+20 0.0133 0.06 Q | | | | 4+25 0.0137 0.06 Q | | | | 4+30 0.0141 0.06 Q | | | | 4+35 0.0146 0.06 Q | | | | 4+40 0.0150 0.06 Q | | | | 4+45 0.0155 0.06 Q | | | | 4+50 0.0159 0.07 Q | | | | 4+55 0.0164 0.07 Q | | | | 5+ 0 0.0169 0.07 Q | | | | 5+ 5 0.0174 0.07 Q | | | | 5+10 0.0178 0.06 Q | | | | 5+15 0.0182 0.06 Q | | | | 5+20 0.0186 0.06 Q | | | | 5+25 0.0190 0.06 Q | | | | 5+30 0.0194 0.06 Q | | | | 5+35 0.0199 0.07 Q | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 499
Menifee Mayor and City Council
July 15, 2026
Page
1129 of 3153
5+40 0.0204 0.07 Q | | | | 5+45 0.0209 0.07 Q | | | | 5+50 0.0214 0.07 Q | | | | 5+55 0.0219 0.07 Q | | | | 6+ 0 0.0224 0.07 QV | | | | 6+ 5 0.0229 0.08 QV | | | | 6+10 0.0235 0.08 QV | | | | 6+15 0.0241 0.08 QV | | | | 6+20 0.0246 0.08 QV | | | | 6+25 0.0252 0.08 QV | | | | 6+30 0.0258 0.08 QV | | | | 6+35 0.0263 0.09 QV | | | | 6+40 0.0270 0.09 QV | | | | 6+45 0.0276 0.09 QV | | | | 6+50 0.0282 0.09 QV | | | | 6+55 0.0288 0.09 QV | | | | 7+ 0 0.0295 0.09 QV | | | | 7+ 5 0.0301 0.09 QV | | | | 7+10 0.0307 0.09 QV | | | | 7+15 0.0314 0.09 QV | | | | 7+20 0.0320 0.09 QV | | | | 7+25 0.0327 0.10 QV | | | | 7+30 0.0334 0.10 QV | | | | 7+35 0.0341 0.11 QV | | | | 7+40 0.0350 0.12 QV | | | | 7+45 0.0358 0.13 QV | | | | 7+50 0.0369 0.16 QV | | | | 7+55 0.0384 0.21 QV | | | | 8+ 0 0.0399 0.22 QV | | | | 8+ 5 0.0419 0.29 |Q | | | | 8+10 0.0445 0.38 |QV | | | | 8+15 0.0473 0.41 |QV | | | | 8+20 0.0502 0.43 |QV | | | | 8+25 0.0532 0.44 |QV | | | | 8+30 0.0563 0.44 |QV | | | | 8+35 0.0595 0.47 |QV | | | | 8+40 0.0632 0.52 | Q | | | | 8+45 0.0669 0.54 | QV | | | | 8+50 0.0708 0.57 | QV | | | | 8+55 0.0751 0.63 | QV | | | | 9+ 0 0.0796 0.64 | QV | | | | 9+ 5 0.0844 0.71 | QV | | | | 9+10 0.0899 0.80 | QV | | | | 9+15 0.0957 0.83 | QV | | | | 9+20 0.1017 0.87 | QV | | | | 9+25 0.1080 0.93 | QV | | | | 9+30 0.1145 0.94 | Q V | | | | 9+35 0.1213 0.98 | Q V | | | | 9+40 0.1284 1.03 | QV | | | | 9+45 0.1356 1.05 | Q V | | | | 9+50 0.1431 1.09 | Q V | | | | 9+55 0.1509 1.14 | Q V | | | | 10+ 0 0.1589 1.15 | Q V | | | | 10+ 5 0.1656 0.98 | Q V | | | | 10+10 0.1703 0.68 | Q V | | | | 10+15 0.1744 0.60 | Q V | | | | 10+20 0.1784 0.57 | Q V | | | | 10+25 0.1822 0.56 | Q V | | | | 10+30 0.1860 0.55 | Q V | | | | 10+35 0.1907 0.68 | Q V | | | | 10+40 0.1969 0.91 | Q V | | | | 10+45 0.2036 0.97 | Q V| | | | 10+50 0.2104 1.00 | Q V| | | | 10+55 0.2174 1.01 | Q V| | | | 11+ 0 0.2245 1.03 | Q V | | | 11+ 5 0.2314 1.01 | Q V | | | 11+10 0.2381 0.97 | Q V | | | 11+15 0.2447 0.96 | Q |V | | | 11+20 0.2513 0.96 | Q |V | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 500
Menifee Mayor and City Council
July 15, 2026
Page
1130 of 3153
11+25 0.2579 0.96 | Q |V | | | 11+30 0.2645 0.96 | Q |V | | | 11+35 0.2708 0.91 | Q | V | | | 11+40 0.2765 0.83 | Q | V | | | 11+45 0.2821 0.81 | Q | V | | | 11+50 0.2878 0.83 | Q | V | | | 11+55 0.2938 0.87 | Q | V | | | 12+ 0 0.2998 0.88 | Q | V | | | 12+ 5 0.3072 1.08 | Q | V | | | 12+10 0.3168 1.39 | Q | V | | | 12+15 0.3270 1.48 | Q | V | | | 12+20 0.3376 1.54 | Q | V | | | 12+25 0.3487 1.61 | Q | V | | | 12+30 0.3600 1.64 | Q | V | | | 12+35 0.3717 1.70 | Q | V | | | 12+40 0.3841 1.80 | Q | V | | | 12+45 0.3966 1.82 | Q | V | | | 12+50 0.4095 1.87 | Q | V | | | 12+55 0.4227 1.92 | Q | V| | | 13+ 0 0.4360 1.94 | Q | V| | | 13+ 5 0.4504 2.08 | Q | V | | 13+10 0.4662 2.31 | Q| |V | | 13+15 0.4825 2.37 | Q| |V | | 13+20 0.4991 2.40 | Q| | V | | 13+25 0.5157 2.42 | Q| | V | | 13+30 0.5324 2.43 | Q| | V | | 13+35 0.5472 2.14 | Q | | V | | 13+40 0.5586 1.66 | Q | | V | | 13+45 0.5692 1.54 | Q | | V | | 13+50 0.5794 1.49 | Q | | V | | 13+55 0.5895 1.46 | Q | | V | | 14+ 0 0.5994 1.45 | Q | | V | | 14+ 5 0.6101 1.55 | Q | | V | | 14+10 0.6220 1.73 | Q | | V | | 14+15 0.6342 1.78 | Q | | V | | 14+20 0.6465 1.77 | Q | | V| | 14+25 0.6585 1.74 | Q | | V| | 14+30 0.6705 1.74 | Q | | V | 14+35 0.6825 1.74 | Q | | V | 14+40 0.6945 1.74 | Q | | |V | 14+45 0.7065 1.75 | Q | | |V | 14+50 0.7184 1.72 | Q | | | V | 14+55 0.7300 1.68 | Q | | | V | 15+ 0 0.7415 1.67 | Q | | | V | 15+ 5 0.7528 1.65 | Q | | | V | 15+10 0.7639 1.60 | Q | | | V | 15+15 0.7748 1.59 | Q | | | V | 15+20 0.7856 1.56 | Q | | | V | 15+25 0.7960 1.52 | Q | | | V | 15+30 0.8064 1.51 | Q | | | V | 15+35 0.8161 1.40 | Q | | | V | 15+40 0.8245 1.22 | Q | | | V | 15+45 0.8327 1.18 | Q | | | V | 15+50 0.8407 1.16 | Q | | | V | 15+55 0.8486 1.16 | Q | | | V | 16+ 0 0.8566 1.15 | Q | | | V | 16+ 5 0.8623 0.83 | Q | | | V| 16+10 0.8643 0.30 |Q | | | V| 16+15 0.8654 0.16 Q | | | V| 16+20 0.8661 0.10 Q | | | V| 16+25 0.8665 0.06 Q | | | V| 16+30 0.8668 0.04 Q | | | V| 16+35 0.8671 0.03 Q | | | V| 16+40 0.8673 0.03 Q | | | V| 16+45 0.8675 0.03 Q | | | V| 16+50 0.8677 0.03 Q | | | V| 16+55 0.8679 0.03 Q | | | V| 17+ 0 0.8680 0.03 Q | | | V| 17+ 5 0.8683 0.03 Q | | | V| Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 501
Menifee Mayor and City Council
July 15, 2026
Page
1131 of 3153
17+10 0.8686 0.04 Q | | | V| 17+15 0.8689 0.04 Q | | | V| 17+20 0.8692 0.04 Q | | | V| 17+25 0.8695 0.05 Q | | | V| 17+30 0.8698 0.05 Q | | | V| 17+35 0.8701 0.05 Q | | | V| 17+40 0.8704 0.05 Q | | | V| 17+45 0.8707 0.05 Q | | | V| 17+50 0.8710 0.04 Q | | | V| 17+55 0.8713 0.04 Q | | | V| 18+ 0 0.8716 0.04 Q | | | V| 18+ 5 0.8718 0.04 Q | | | V| 18+10 0.8721 0.04 Q | | | V| 18+15 0.8723 0.04 Q | | | V| 18+20 0.8726 0.04 Q | | | V| 18+25 0.8728 0.04 Q | | | V| 18+30 0.8731 0.04 Q | | | V| 18+35 0.8733 0.03 Q | | | V| 18+40 0.8735 0.03 Q | | | V| 18+45 0.8737 0.03 Q | | | V| 18+50 0.8739 0.03 Q | | | V| 18+55 0.8741 0.02 Q | | | V| 19+ 0 0.8742 0.02 Q | | | V| 19+ 5 0.8743 0.02 Q | | | V| 19+10 0.8745 0.03 Q | | | V| 19+15 0.8747 0.03 Q | | | V| 19+20 0.8749 0.03 Q | | | V| 19+25 0.8751 0.03 Q | | | V| 19+30 0.8754 0.04 Q | | | V| 19+35 0.8756 0.03 Q | | | V| 19+40 0.8758 0.03 Q | | | V| 19+45 0.8760 0.03 Q | | | V| 19+50 0.8762 0.03 Q | | | V| 19+55 0.8763 0.02 Q | | | V| 20+ 0 0.8765 0.02 Q | | | V| 20+ 5 0.8766 0.02 Q | | | V| 20+10 0.8768 0.03 Q | | | V| 20+15 0.8770 0.03 Q | | | V| 20+20 0.8772 0.03 Q | | | V| 20+25 0.8773 0.03 Q | | | V| 20+30 0.8775 0.03 Q | | | V| 20+35 0.8777 0.03 Q | | | V| 20+40 0.8779 0.03 Q | | | V| 20+45 0.8781 0.03 Q | | | V| 20+50 0.8783 0.02 Q | | | V| 20+55 0.8784 0.02 Q | | | V| 21+ 0 0.8786 0.02 Q | | | V| 21+ 5 0.8787 0.02 Q | | | V| 21+10 0.8789 0.03 Q | | | V| 21+15 0.8791 0.03 Q | | | V| 21+20 0.8792 0.02 Q | | | V| 21+25 0.8794 0.02 Q | | | V| 21+30 0.8795 0.02 Q | | | V| 21+35 0.8797 0.02 Q | | | V| 21+40 0.8798 0.03 Q | | | V| 21+45 0.8800 0.03 Q | | | V| 21+50 0.8802 0.02 Q | | | V| 21+55 0.8803 0.02 Q | | | V| 22+ 0 0.8805 0.02 Q | | | V| 22+ 5 0.8806 0.02 Q | | | V| 22+10 0.8808 0.03 Q | | | V| 22+15 0.8810 0.03 Q | | | V| 22+20 0.8811 0.02 Q | | | V| 22+25 0.8813 0.02 Q | | | V| 22+30 0.8814 0.02 Q | | | V| 22+35 0.8815 0.02 Q | | | V| 22+40 0.8817 0.02 Q | | | V| 22+45 0.8818 0.02 Q | | | V| 22+50 0.8819 0.02 Q | | | V| Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 502
Menifee Mayor and City Council
July 15, 2026
Page
1132 of 3153
22+55 0.8820 0.02 Q | | | V| 23+ 0 0.8822 0.02 Q | | | V| 23+ 5 0.8823 0.02 Q | | | V| 23+10 0.8824 0.02 Q | | | V| 23+15 0.8826 0.02 Q | | | V| 23+20 0.8827 0.02 Q | | | V| 23+25 0.8828 0.02 Q | | | V| 23+30 0.8829 0.02 Q | | | V| 23+35 0.8831 0.02 Q | | | V| 23+40 0.8832 0.02 Q | | | V| 23+45 0.8833 0.02 Q | | | V| 23+50 0.8834 0.02 Q | | | V| 23+55 0.8836 0.02 Q | | | V| 24+ 0 0.8837 0.02 Q | | | V| 24+ 5 0.8838 0.01 Q | | | V| 24+10 0.8838 0.00 Q | | | V| 24+15 0.8838 0.00 Q | | | V| 24+20 0.8838 0.00 Q | | | V| 24+25 0.8838 0.00 Q | | | V| 24+30 0.8838 0.00 Q | | | V| ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 503
Menifee Mayor and City Council
July 15, 2026
Page
1133 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10A110.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
WESTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.024 Hr.
Lag time = 1.42 Min.
25% of lag time = 0.35 Min.
40% of lag time = 0.57 Min.
Unit time = 5.00 Min.
Duration of storm = 1 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 0.45 3.96
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.20 10.57
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.450(In)
Area Averaged 100-Year Rainfall = 1.200(In)
Point rain (area averaged) = 0.759(In)
Areal adjustment factor = 99.99 %
Adjusted average point rain = 0.758(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 504
Menifee Mayor and City Council
July 15, 2026
Page
1134 of 3153
8.810 75.00 0.900
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- Slope of intensity-duration curve for a 1 hour storm =0.5000 ---------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 352.601 61.513 5.462 2 0.167 705.202 34.395 3.054 3 0.250 1057.803 4.092 0.363 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 4.20 0.382 ( 0.058) 0.038 0.344 2 0.17 4.30 0.391 ( 0.058) 0.039 0.352 3 0.25 5.00 0.455 ( 0.058) 0.046 0.410 4 0.33 5.00 0.455 ( 0.058) 0.046 0.410 5 0.42 5.80 0.528 ( 0.058) 0.053 0.475 6 0.50 6.50 0.592 0.058 ( 0.059) 0.534 7 0.58 7.40 0.674 0.058 ( 0.067) 0.616 8 0.67 8.60 0.783 0.058 ( 0.078) 0.725 9 0.75 12.30 1.120 0.058 ( 0.112) 1.062 10 0.83 29.10 2.649 0.058 ( 0.265) 2.591 11 0.92 6.80 0.619 0.058 ( 0.062) 0.561 12 1.00 5.00 0.455 ( 0.058) 0.046 0.410 (Loss Rate Not Used)
Sum = 100.0 Sum = 8.5 Flood volume = Effective rainfall 0.71(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 0.5(Ac.Ft) Total soil loss = 0.05(In)
Total soil loss = 0.037(Ac.Ft)
Total rainfall = 0.76(In)
Flood volume = 22625.6 Cubic Feet
Total soil loss = 1631.3 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 17.667(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 5.0 10.0 15.0 20.0 ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 505
Menifee Mayor and City Council
July 15, 2026
Page
1135 of 3153
0+ 5 0.0129 1.88 V Q | | | | 0+10 0.0334 2.98 | V Q | | | | 0+15 0.0571 3.44 | V Q | | | | 0+20 0.0820 3.62 | VQ | | | | 0+25 0.1096 4.00 | QV | | | | 0+30 0.1407 4.52 | QV | | | 0+35 0.1763 5.17 | Q V | | | 0+40 0.2179 6.04 | | Q V | | | 0+45 0.2747 8.24 | | Q |V | | 0+50 0.3963 17.67 | | | V Q | 0+55 0.4746 11.37 | | | Q | V | 1+ 0 0.5084 4.90 | Q| | | V| 1+ 5 0.5184 1.46 | Q | | | V| 1+10 0.5194 0.15 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 506
Menifee Mayor and City Council
July 15, 2026
Page
1136 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10A310.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
WESTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.024 Hr.
Lag time = 1.42 Min.
25% of lag time = 0.35 Min.
40% of lag time = 0.57 Min.
Unit time = 5.00 Min.
Duration of storm = 3 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 0.80 7.05
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.80 15.86
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 0.800(In)
Area Averaged 100-Year Rainfall = 1.800(In)
Point rain (area averaged) = 1.211(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.211(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 507
Menifee Mayor and City Council
July 15, 2026
Page
1137 of 3153
8.810 75.00 0.900
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 352.601 61.513 5.462 2 0.167 705.202 34.395 3.054 3 0.250 1057.803 4.092 0.363 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 1.30 0.189 ( 0.058) 0.019 0.170 2 0.17 1.30 0.189 ( 0.058) 0.019 0.170 3 0.25 1.10 0.160 ( 0.058) 0.016 0.144 4 0.33 1.50 0.218 ( 0.058) 0.022 0.196 5 0.42 1.50 0.218 ( 0.058) 0.022 0.196 6 0.50 1.80 0.262 ( 0.058) 0.026 0.235 7 0.58 1.50 0.218 ( 0.058) 0.022 0.196 8 0.67 1.80 0.262 ( 0.058) 0.026 0.235 9 0.75 1.80 0.262 ( 0.058) 0.026 0.235 10 0.83 1.50 0.218 ( 0.058) 0.022 0.196 11 0.92 1.60 0.233 ( 0.058) 0.023 0.209 12 1.00 1.80 0.262 ( 0.058) 0.026 0.235 13 1.08 2.20 0.320 ( 0.058) 0.032 0.288 14 1.17 2.20 0.320 ( 0.058) 0.032 0.288 15 1.25 2.20 0.320 ( 0.058) 0.032 0.288 16 1.33 2.00 0.291 ( 0.058) 0.029 0.262 17 1.42 2.60 0.378 ( 0.058) 0.038 0.340 18 1.50 2.70 0.392 ( 0.058) 0.039 0.353 19 1.58 2.40 0.349 ( 0.058) 0.035 0.314 20 1.67 2.70 0.392 ( 0.058) 0.039 0.353 21 1.75 3.30 0.480 ( 0.058) 0.048 0.432 22 1.83 3.10 0.451 ( 0.058) 0.045 0.406 23 1.92 2.90 0.422 ( 0.058) 0.042 0.379 24 2.00 3.00 0.436 ( 0.058) 0.044 0.392 25 2.08 3.10 0.451 ( 0.058) 0.045 0.406 26 2.17 4.20 0.611 0.058 ( 0.061) 0.553 27 2.25 5.00 0.727 0.058 ( 0.073) 0.669 28 2.33 3.50 0.509 ( 0.058) 0.051 0.458 29 2.42 6.80 0.988 0.058 ( 0.099) 0.931 30 2.50 7.30 1.061 0.058 ( 0.106) 1.004 31 2.58 8.20 1.192 0.058 ( 0.119) 1.134 32 2.67 5.90 0.858 0.058 ( 0.086) 0.800 33 2.75 2.00 0.291 ( 0.058) 0.029 0.262 34 2.83 1.80 0.262 ( 0.058) 0.026 0.235 35 2.92 1.80 0.262 ( 0.058) 0.026 0.235 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 508
Menifee Mayor and City Council
July 15, 2026
Page
1138 of 3153
36 3.00 0.60 0.087 ( 0.058) 0.009 0.078 (Loss Rate Not Used)
Sum = 100.0 Sum = 13.3 Flood volume = Effective rainfall 1.11(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 0.8(Ac.Ft) Total soil loss = 0.10(In)
Total soil loss = 0.077(Ac.Ft)
Total rainfall = 1.21(In)
Flood volume = 35394.0 Cubic Feet
Total soil loss = 3345.7 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 9.604(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0064 0.93 V Q | | | | 0+10 0.0164 1.45 V Q | | | | 0+15 0.0258 1.37 |V Q | | | | 0+20 0.0366 1.57 |V Q | | | | 0+25 0.0485 1.72 | V Q | | | | 0+30 0.0620 1.96 | V Q | | | | 0+35 0.0748 1.86 | V Q | | | | 0+40 0.0884 1.97 | V Q | | | | 0+45 0.1027 2.08 | V Q | | | | 0+50 0.1157 1.88 | V Q | | | | 0+55 0.1282 1.83 | VQ | | | | 1+ 0 0.1420 2.00 | VQ | | | | 1+ 5 0.1583 2.37 | V Q| | | | 1+10 0.1758 2.54 | V Q | | | 1+15 0.1934 2.56 | VQ | | | 1+20 0.2100 2.41 | QV | | | 1+25 0.2291 2.76 | |Q | | | 1+30 0.2502 3.06 | | Q | | | 1+35 0.2703 2.92 | |Q V | | | 1+40 0.2910 3.02 | | Q V | | | 1+45 0.3155 3.55 | | QV | | | 1+50 0.3407 3.66 | | Q V | | | 1+55 0.3646 3.47 | | Q V | | | 2+ 0 0.3884 3.45 | | Q V| | | 2+ 5 0.4129 3.55 | | Q V | | 2+10 0.4432 4.40 | | Q |V | | 2+15 0.4810 5.49 | | |Q V | | 2+20 0.5137 4.75 | | Q | V | | 2+25 0.5601 6.73 | | | QV | | 2+30 0.6186 8.49 | | | V Q | 2+35 0.6847 9.60 | | | | V Q | 2+40 0.7412 8.20 | | | | Q V | 2+45 0.7708 4.29 | | Q | | V | 2+50 0.7871 2.38 | Q| | | V | 2+55 0.8016 2.10 | Q | | | V| 3+ 0 0.8101 1.23 | Q | | | V| 3+ 5 0.8123 0.33 |Q | | | V| 3+10 0.8125 0.03 Q | | | V ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 509
Menifee Mayor and City Council
July 15, 2026
Page
1139 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10A610.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
WESTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.024 Hr.
Lag time = 1.42 Min.
25% of lag time = 0.35 Min.
40% of lag time = 0.57 Min.
Unit time = 5.00 Min.
Duration of storm = 6 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.00 8.81
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 2.50 22.03
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.000(In)
Area Averaged 100-Year Rainfall = 2.500(In)
Point rain (area averaged) = 1.617(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 1.617(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 510
Menifee Mayor and City Council
July 15, 2026
Page
1140 of 3153
8.810 75.00 0.900
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 352.601 61.513 5.462 2 0.167 705.202 34.395 3.054 3 0.250 1057.803 4.092 0.363 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.50 0.097 ( 0.058) 0.010 0.087 2 0.17 0.60 0.116 ( 0.058) 0.012 0.105 3 0.25 0.60 0.116 ( 0.058) 0.012 0.105 4 0.33 0.60 0.116 ( 0.058) 0.012 0.105 5 0.42 0.60 0.116 ( 0.058) 0.012 0.105 6 0.50 0.70 0.136 ( 0.058) 0.014 0.122 7 0.58 0.70 0.136 ( 0.058) 0.014 0.122 8 0.67 0.70 0.136 ( 0.058) 0.014 0.122 9 0.75 0.70 0.136 ( 0.058) 0.014 0.122 10 0.83 0.70 0.136 ( 0.058) 0.014 0.122 11 0.92 0.70 0.136 ( 0.058) 0.014 0.122 12 1.00 0.80 0.155 ( 0.058) 0.016 0.140 13 1.08 0.80 0.155 ( 0.058) 0.016 0.140 14 1.17 0.80 0.155 ( 0.058) 0.016 0.140 15 1.25 0.80 0.155 ( 0.058) 0.016 0.140 16 1.33 0.80 0.155 ( 0.058) 0.016 0.140 17 1.42 0.80 0.155 ( 0.058) 0.016 0.140 18 1.50 0.80 0.155 ( 0.058) 0.016 0.140 19 1.58 0.80 0.155 ( 0.058) 0.016 0.140 20 1.67 0.80 0.155 ( 0.058) 0.016 0.140 21 1.75 0.80 0.155 ( 0.058) 0.016 0.140 22 1.83 0.80 0.155 ( 0.058) 0.016 0.140 23 1.92 0.80 0.155 ( 0.058) 0.016 0.140 24 2.00 0.90 0.175 ( 0.058) 0.017 0.157 25 2.08 0.80 0.155 ( 0.058) 0.016 0.140 26 2.17 0.90 0.175 ( 0.058) 0.017 0.157 27 2.25 0.90 0.175 ( 0.058) 0.017 0.157 28 2.33 0.90 0.175 ( 0.058) 0.017 0.157 29 2.42 0.90 0.175 ( 0.058) 0.017 0.157 30 2.50 0.90 0.175 ( 0.058) 0.017 0.157 31 2.58 0.90 0.175 ( 0.058) 0.017 0.157 32 2.67 0.90 0.175 ( 0.058) 0.017 0.157 33 2.75 1.00 0.194 ( 0.058) 0.019 0.175 34 2.83 1.00 0.194 ( 0.058) 0.019 0.175 35 2.92 1.00 0.194 ( 0.058) 0.019 0.175 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 511
Menifee Mayor and City Council
July 15, 2026
Page
1141 of 3153
36 3.00 1.00 0.194 ( 0.058) 0.019 0.175 37 3.08 1.00 0.194 ( 0.058) 0.019 0.175 38 3.17 1.10 0.213 ( 0.058) 0.021 0.192 39 3.25 1.10 0.213 ( 0.058) 0.021 0.192 40 3.33 1.10 0.213 ( 0.058) 0.021 0.192 41 3.42 1.20 0.233 ( 0.058) 0.023 0.210 42 3.50 1.30 0.252 ( 0.058) 0.025 0.227 43 3.58 1.40 0.272 ( 0.058) 0.027 0.244 44 3.67 1.40 0.272 ( 0.058) 0.027 0.244 45 3.75 1.50 0.291 ( 0.058) 0.029 0.262 46 3.83 1.50 0.291 ( 0.058) 0.029 0.262 47 3.92 1.60 0.310 ( 0.058) 0.031 0.279 48 4.00 1.60 0.310 ( 0.058) 0.031 0.279 49 4.08 1.70 0.330 ( 0.058) 0.033 0.297 50 4.17 1.80 0.349 ( 0.058) 0.035 0.314 51 4.25 1.90 0.369 ( 0.058) 0.037 0.332 52 4.33 2.00 0.388 ( 0.058) 0.039 0.349 53 4.42 2.10 0.407 ( 0.058) 0.041 0.367 54 4.50 2.10 0.407 ( 0.058) 0.041 0.367 55 4.58 2.20 0.427 ( 0.058) 0.043 0.384 56 4.67 2.30 0.446 ( 0.058) 0.045 0.402 57 4.75 2.40 0.466 ( 0.058) 0.047 0.419 58 4.83 2.40 0.466 ( 0.058) 0.047 0.419 59 4.92 2.50 0.485 ( 0.058) 0.049 0.437 60 5.00 2.60 0.505 ( 0.058) 0.050 0.454 61 5.08 3.10 0.602 0.058 ( 0.060) 0.544 62 5.17 3.60 0.699 0.058 ( 0.070) 0.641 63 5.25 3.90 0.757 0.058 ( 0.076) 0.699 64 5.33 4.20 0.815 0.058 ( 0.081) 0.757 65 5.42 4.70 0.912 0.058 ( 0.091) 0.854 66 5.50 5.60 1.087 0.058 ( 0.109) 1.029 67 5.58 1.90 0.369 ( 0.058) 0.037 0.332 68 5.67 0.90 0.175 ( 0.058) 0.017 0.157 69 5.75 0.60 0.116 ( 0.058) 0.012 0.105 70 5.83 0.50 0.097 ( 0.058) 0.010 0.087 71 5.92 0.30 0.058 ( 0.058) 0.006 0.052 72 6.00 0.20 0.039 ( 0.058) 0.004 0.035 (Loss Rate Not Used)
Sum = 100.0 Sum = 17.6 Flood volume = Effective rainfall 1.47(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 1.1(Ac.Ft) Total soil loss = 0.15(In)
Total soil loss = 0.110(Ac.Ft)
Total rainfall = 1.62(In)
Flood volume = 46920.2 Cubic Feet
Total soil loss = 4793.9 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 8.510(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 6 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0033 0.48 VQ | | | | 0+10 0.0091 0.84 V Q | | | | 0+15 0.0154 0.92 V Q | | | | 0+20 0.0218 0.93 V Q | | | | 0+25 0.0283 0.93 |V Q | | | | 0+30 0.0353 1.03 |V Q | | | | 0+35 0.0428 1.08 |V Q | | | | 0+40 0.0502 1.09 |V Q | | | | 0+45 0.0577 1.09 | V Q | | | | 0+50 0.0652 1.09 | V Q | | | | 0+55 0.0727 1.09 | V Q | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 512
Menifee Mayor and City Council
July 15, 2026
Page
1142 of 3153
1+ 0 0.0808 1.18 | VQ | | | | 1+ 5 0.0893 1.23 | VQ | | | | 1+10 0.0979 1.24 | VQ | | | | 1+15 0.1064 1.24 | VQ | | | | 1+20 0.1150 1.24 | Q | | | | 1+25 0.1235 1.24 | Q | | | | 1+30 0.1321 1.24 | Q | | | | 1+35 0.1406 1.24 | QV | | | | 1+40 0.1492 1.24 | QV | | | | 1+45 0.1577 1.24 | QV | | | | 1+50 0.1662 1.24 | Q V | | | | 1+55 0.1748 1.24 | Q V | | | | 2+ 0 0.1840 1.34 | QV | | | | 2+ 5 0.1929 1.29 | Q V | | | | 2+10 0.2022 1.34 | Q V | | | | 2+15 0.2117 1.39 | Q V | | | | 2+20 0.2214 1.40 | Q V | | | | 2+25 0.2310 1.40 | Q V | | | | 2+30 0.2406 1.40 | Q V | | | | 2+35 0.2502 1.40 | Q V| | | | 2+40 0.2598 1.40 | Q V| | | | 2+45 0.2701 1.49 | Q V | | | 2+50 0.2807 1.55 | Q V | | | 2+55 0.2914 1.55 | Q V | | | 3+ 0 0.3021 1.55 | Q |V | | | 3+ 5 0.3128 1.55 | Q |V | | | 3+10 0.3241 1.65 | Q | V | | | 3+15 0.3358 1.70 | Q | V | | | 3+20 0.3476 1.71 | Q | V | | | 3+25 0.3600 1.80 | Q | V | | | 3+30 0.3734 1.95 | Q | V | | | 3+35 0.3879 2.11 | Q | V | | | 3+40 0.4029 2.17 | Q | V | | | 3+45 0.4185 2.27 | Q| V | | | 3+50 0.4345 2.32 | Q| V | | | 3+55 0.4511 2.42 | Q| V | | | 4+ 0 0.4682 2.48 | Q| V | | | 4+ 5 0.4859 2.58 | Q V | | | 4+10 0.5047 2.73 | Q V | | | 4+15 0.5246 2.88 | |Q V| | | 4+20 0.5455 3.04 | | Q V | | 4+25 0.5675 3.19 | | Q |V | | 4+30 0.5899 3.25 | | Q |V | | 4+35 0.6130 3.35 | | Q | V | | 4+40 0.6371 3.50 | | Q | V | | 4+45 0.6623 3.66 | | Q | V | | 4+50 0.6879 3.72 | | Q | V | | 4+55 0.7142 3.82 | | Q | V | | 5+ 0 0.7415 3.97 | | Q | V | | 5+ 5 0.7726 4.52 | | Q | V | | 5+10 0.8093 5.33 | | |Q V | 5+15 0.8505 5.98 | | | Q |V | 5+20 0.8953 6.51 | | | Q | V | 5+25 0.9452 7.24 | | | Q | V | 5+30 1.0038 8.51 | | | | Q V | 5+35 1.0400 5.27 | | |Q | V | 5+40 1.0555 2.25 | Q | | | V| 5+45 1.0636 1.17 | Q | | | V| 5+50 1.0695 0.85 | Q | | | V| 5+55 1.0736 0.59 | Q | | | V| 6+ 0 1.0762 0.38 |Q | | | V| 6+ 5 1.0771 0.13 Q | | | V| 6+10 1.0771 0.01 Q | | | V| ----------------------------------------------------------------------- Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 513
Menifee Mayor and City Council
July 15, 2026
Page
1143 of 3153
U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989 - 2014, Version 9.0 Study date 08/07/25 File: 4100PR10A2410.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Riverside County Synthetic Unit Hydrology Method
RCFC & WCD Manual date - April 1978
Program License Serial Number 6400
--------------------------------------------------------------------- English (in-lb) Input Units Used
English Rainfall Data (Inches) Input Values Used
English Units used in output format
--------------------------------------------------------------------- TEI JOB NUMBER 4100
PROPOSED CONDITIONS
WESTERLY TRUCK YARD
10-YEAR STORM EVENT
-------------------------------------------------------------------- Drainage Area = 8.81(Ac.) = 0.014 Sq. Mi.
Drainage Area for Depth-Area Areal Adjustment = 8.81(Ac.) = 0.014 Sq. Mi.
Length along longest watercourse = 506.00(Ft.)
Length along longest watercourse measured to centroid = 292.00(Ft.) Length along longest watercourse = 0.096 Mi.
Length along longest watercourse measured to centroid = 0.055 Mi.
Difference in elevation = 4.52(Ft.)
Slope along watercourse = 47.1652 Ft./Mi.
Average Manning's 'N' = 0.015
Lag time = 0.024 Hr.
Lag time = 1.42 Min.
25% of lag time = 0.35 Min.
40% of lag time = 0.57 Min.
Unit time = 5.00 Min.
Duration of storm = 24 Hour(s)
User Entered Base Flow = 0.00(CFS)
2 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 1.60 14.10
100 YEAR Area rainfall data:
Area(Ac.)[1] Rainfall(In)[2] Weighting[1*2]
8.81 4.00 35.24
STORM EVENT (YEAR) = 10.00
Area Averaged 2-Year Rainfall = 1.600(In)
Area Averaged 100-Year Rainfall = 4.000(In)
Point rain (area averaged) = 2.587(In)
Areal adjustment factor = 100.00 %
Adjusted average point rain = 2.587(In)
Sub-Area Data:
Area(Ac.) Runoff Index Impervious %
Revised 11/15
Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 514
Menifee Mayor and City Council
July 15, 2026
Page
1144 of 3153
8.810 75.00 0.900
Total Area Entered = 8.81(Ac.)
RI RI Infil. Rate Impervious Adj. Infil. Rate Area% F AMC2 AMC-2 (In/Hr) (Dec.%) (In/Hr) (Dec.) (In/Hr)
75.0 75.0 0.303 0.900 0.058 1.000 0.058 Sum (F) = 0.058
Area averaged mean soil loss (F) (In/Hr) = 0.058
Minimum soil loss rate ((In/Hr)) = 0.029
(for 24 hour storm duration)
Soil low loss rate (decimal) = 0.100
--------------------------------------------------------------------- U n i t H y d r o g r a p h
VALLEY S-Curve
-------------------------------------------------------------------- Unit Hydrograph Data
--------------------------------------------------------------------- Unit time period Time % of lag Distribution Unit Hydrograph (hrs) Graph % (CFS) --------------------------------------------------------------------- 1 0.083 352.601 61.513 5.462 2 0.167 705.202 34.395 3.054 3 0.250 1057.803 4.092 0.363 Sum = 100.000 Sum= 8.879
----------------------------------------------------------------------- The following loss rate calculations reflect use of the minimum calculated loss rate subtracted from the Storm Rain to produce the maximum Effective Rain value Unit Time Pattern Storm Rain Loss rate(In./Hr) Effective (Hr.) Percent (In/Hr) Max | Low (In/Hr) 1 0.08 0.07 0.021 ( 0.102) 0.002 0.019 2 0.17 0.07 0.021 ( 0.102) 0.002 0.019 3 0.25 0.07 0.021 ( 0.101) 0.002 0.019 4 0.33 0.10 0.031 ( 0.101) 0.003 0.028 5 0.42 0.10 0.031 ( 0.100) 0.003 0.028 6 0.50 0.10 0.031 ( 0.100) 0.003 0.028 7 0.58 0.10 0.031 ( 0.100) 0.003 0.028 8 0.67 0.10 0.031 ( 0.099) 0.003 0.028 9 0.75 0.10 0.031 ( 0.099) 0.003 0.028 10 0.83 0.13 0.041 ( 0.099) 0.004 0.037 11 0.92 0.13 0.041 ( 0.098) 0.004 0.037 12 1.00 0.13 0.041 ( 0.098) 0.004 0.037 13 1.08 0.10 0.031 ( 0.097) 0.003 0.028 14 1.17 0.10 0.031 ( 0.097) 0.003 0.028 15 1.25 0.10 0.031 ( 0.097) 0.003 0.028 16 1.33 0.10 0.031 ( 0.096) 0.003 0.028 17 1.42 0.10 0.031 ( 0.096) 0.003 0.028 18 1.50 0.10 0.031 ( 0.095) 0.003 0.028 19 1.58 0.10 0.031 ( 0.095) 0.003 0.028 20 1.67 0.10 0.031 ( 0.095) 0.003 0.028 21 1.75 0.10 0.031 ( 0.094) 0.003 0.028 22 1.83 0.13 0.041 ( 0.094) 0.004 0.037 23 1.92 0.13 0.041 ( 0.094) 0.004 0.037 24 2.00 0.13 0.041 ( 0.093) 0.004 0.037 25 2.08 0.13 0.041 ( 0.093) 0.004 0.037 26 2.17 0.13 0.041 ( 0.092) 0.004 0.037 27 2.25 0.13 0.041 ( 0.092) 0.004 0.037 28 2.33 0.13 0.041 ( 0.092) 0.004 0.037 29 2.42 0.13 0.041 ( 0.091) 0.004 0.037 30 2.50 0.13 0.041 ( 0.091) 0.004 0.037 31 2.58 0.17 0.052 ( 0.091) 0.005 0.047 32 2.67 0.17 0.052 ( 0.090) 0.005 0.047 33 2.75 0.17 0.052 ( 0.090) 0.005 0.047 34 2.83 0.17 0.052 ( 0.089) 0.005 0.047 35 2.92 0.17 0.052 ( 0.089) 0.005 0.047 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 515
Menifee Mayor and City Council
July 15, 2026
Page
1145 of 3153
36 3.00 0.17 0.052 ( 0.089) 0.005 0.047 37 3.08 0.17 0.052 ( 0.088) 0.005 0.047 38 3.17 0.17 0.052 ( 0.088) 0.005 0.047 39 3.25 0.17 0.052 ( 0.088) 0.005 0.047 40 3.33 0.17 0.052 ( 0.087) 0.005 0.047 41 3.42 0.17 0.052 ( 0.087) 0.005 0.047 42 3.50 0.17 0.052 ( 0.087) 0.005 0.047 43 3.58 0.17 0.052 ( 0.086) 0.005 0.047 44 3.67 0.17 0.052 ( 0.086) 0.005 0.047 45 3.75 0.17 0.052 ( 0.085) 0.005 0.047 46 3.83 0.20 0.062 ( 0.085) 0.006 0.056 47 3.92 0.20 0.062 ( 0.085) 0.006 0.056 48 4.00 0.20 0.062 ( 0.084) 0.006 0.056 49 4.08 0.20 0.062 ( 0.084) 0.006 0.056 50 4.17 0.20 0.062 ( 0.084) 0.006 0.056 51 4.25 0.20 0.062 ( 0.083) 0.006 0.056 52 4.33 0.23 0.072 ( 0.083) 0.007 0.065 53 4.42 0.23 0.072 ( 0.083) 0.007 0.065 54 4.50 0.23 0.072 ( 0.082) 0.007 0.065 55 4.58 0.23 0.072 ( 0.082) 0.007 0.065 56 4.67 0.23 0.072 ( 0.082) 0.007 0.065 57 4.75 0.23 0.072 ( 0.081) 0.007 0.065 58 4.83 0.27 0.083 ( 0.081) 0.008 0.075 59 4.92 0.27 0.083 ( 0.080) 0.008 0.075 60 5.00 0.27 0.083 ( 0.080) 0.008 0.075 61 5.08 0.20 0.062 ( 0.080) 0.006 0.056 62 5.17 0.20 0.062 ( 0.079) 0.006 0.056 63 5.25 0.20 0.062 ( 0.079) 0.006 0.056 64 5.33 0.23 0.072 ( 0.079) 0.007 0.065 65 5.42 0.23 0.072 ( 0.078) 0.007 0.065 66 5.50 0.23 0.072 ( 0.078) 0.007 0.065 67 5.58 0.27 0.083 ( 0.078) 0.008 0.075 68 5.67 0.27 0.083 ( 0.077) 0.008 0.075 69 5.75 0.27 0.083 ( 0.077) 0.008 0.075 70 5.83 0.27 0.083 ( 0.077) 0.008 0.075 71 5.92 0.27 0.083 ( 0.076) 0.008 0.075 72 6.00 0.27 0.083 ( 0.076) 0.008 0.075 73 6.08 0.30 0.093 ( 0.076) 0.009 0.084 74 6.17 0.30 0.093 ( 0.075) 0.009 0.084 75 6.25 0.30 0.093 ( 0.075) 0.009 0.084 76 6.33 0.30 0.093 ( 0.075) 0.009 0.084 77 6.42 0.30 0.093 ( 0.074) 0.009 0.084 78 6.50 0.30 0.093 ( 0.074) 0.009 0.084 79 6.58 0.33 0.103 ( 0.074) 0.010 0.093 80 6.67 0.33 0.103 ( 0.073) 0.010 0.093 81 6.75 0.33 0.103 ( 0.073) 0.010 0.093 82 6.83 0.33 0.103 ( 0.073) 0.010 0.093 83 6.92 0.33 0.103 ( 0.072) 0.010 0.093 84 7.00 0.33 0.103 ( 0.072) 0.010 0.093 85 7.08 0.33 0.103 ( 0.072) 0.010 0.093 86 7.17 0.33 0.103 ( 0.071) 0.010 0.093 87 7.25 0.33 0.103 ( 0.071) 0.010 0.093 88 7.33 0.37 0.114 ( 0.071) 0.011 0.102 89 7.42 0.37 0.114 ( 0.070) 0.011 0.102 90 7.50 0.37 0.114 ( 0.070) 0.011 0.102 91 7.58 0.40 0.124 ( 0.070) 0.012 0.112 92 7.67 0.40 0.124 ( 0.069) 0.012 0.112 93 7.75 0.40 0.124 ( 0.069) 0.012 0.112 94 7.83 0.43 0.135 ( 0.069) 0.013 0.121 95 7.92 0.43 0.135 ( 0.068) 0.013 0.121 96 8.00 0.43 0.135 ( 0.068) 0.013 0.121 97 8.08 0.50 0.155 ( 0.068) 0.016 0.140 98 8.17 0.50 0.155 ( 0.067) 0.016 0.140 99 8.25 0.50 0.155 ( 0.067) 0.016 0.140 100 8.33 0.50 0.155 ( 0.067) 0.016 0.140 101 8.42 0.50 0.155 ( 0.067) 0.016 0.140 102 8.50 0.50 0.155 ( 0.066) 0.016 0.140 103 8.58 0.53 0.166 ( 0.066) 0.017 0.149 104 8.67 0.53 0.166 ( 0.066) 0.017 0.149 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 516
Menifee Mayor and City Council
July 15, 2026
Page
1146 of 3153
105 8.75 0.53 0.166 ( 0.065) 0.017 0.149 106 8.83 0.57 0.176 ( 0.065) 0.018 0.158 107 8.92 0.57 0.176 ( 0.065) 0.018 0.158 108 9.00 0.57 0.176 ( 0.064) 0.018 0.158 109 9.08 0.63 0.197 ( 0.064) 0.020 0.177 110 9.17 0.63 0.197 ( 0.064) 0.020 0.177 111 9.25 0.63 0.197 ( 0.063) 0.020 0.177 112 9.33 0.67 0.207 ( 0.063) 0.021 0.186 113 9.42 0.67 0.207 ( 0.063) 0.021 0.186 114 9.50 0.67 0.207 ( 0.063) 0.021 0.186 115 9.58 0.70 0.217 ( 0.062) 0.022 0.196 116 9.67 0.70 0.217 ( 0.062) 0.022 0.196 117 9.75 0.70 0.217 ( 0.062) 0.022 0.196 118 9.83 0.73 0.228 ( 0.061) 0.023 0.205 119 9.92 0.73 0.228 ( 0.061) 0.023 0.205 120 10.00 0.73 0.228 ( 0.061) 0.023 0.205 121 10.08 0.50 0.155 ( 0.060) 0.016 0.140 122 10.17 0.50 0.155 ( 0.060) 0.016 0.140 123 10.25 0.50 0.155 ( 0.060) 0.016 0.140 124 10.33 0.50 0.155 ( 0.060) 0.016 0.140 125 10.42 0.50 0.155 ( 0.059) 0.016 0.140 126 10.50 0.50 0.155 ( 0.059) 0.016 0.140 127 10.58 0.67 0.207 ( 0.059) 0.021 0.186 128 10.67 0.67 0.207 ( 0.058) 0.021 0.186 129 10.75 0.67 0.207 ( 0.058) 0.021 0.186 130 10.83 0.67 0.207 ( 0.058) 0.021 0.186 131 10.92 0.67 0.207 ( 0.058) 0.021 0.186 132 11.00 0.67 0.207 ( 0.057) 0.021 0.186 133 11.08 0.63 0.197 ( 0.057) 0.020 0.177 134 11.17 0.63 0.197 ( 0.057) 0.020 0.177 135 11.25 0.63 0.197 ( 0.056) 0.020 0.177 136 11.33 0.63 0.197 ( 0.056) 0.020 0.177 137 11.42 0.63 0.197 ( 0.056) 0.020 0.177 138 11.50 0.63 0.197 ( 0.056) 0.020 0.177 139 11.58 0.57 0.176 ( 0.055) 0.018 0.158 140 11.67 0.57 0.176 ( 0.055) 0.018 0.158 141 11.75 0.57 0.176 ( 0.055) 0.018 0.158 142 11.83 0.60 0.186 ( 0.055) 0.019 0.168 143 11.92 0.60 0.186 ( 0.054) 0.019 0.168 144 12.00 0.60 0.186 ( 0.054) 0.019 0.168 145 12.08 0.83 0.259 ( 0.054) 0.026 0.233 146 12.17 0.83 0.259 ( 0.053) 0.026 0.233 147 12.25 0.83 0.259 ( 0.053) 0.026 0.233 148 12.33 0.87 0.269 ( 0.053) 0.027 0.242 149 12.42 0.87 0.269 ( 0.053) 0.027 0.242 150 12.50 0.87 0.269 ( 0.052) 0.027 0.242 151 12.58 0.93 0.290 ( 0.052) 0.029 0.261 152 12.67 0.93 0.290 ( 0.052) 0.029 0.261 153 12.75 0.93 0.290 ( 0.052) 0.029 0.261 154 12.83 0.97 0.300 ( 0.051) 0.030 0.270 155 12.92 0.97 0.300 ( 0.051) 0.030 0.270 156 13.00 0.97 0.300 ( 0.051) 0.030 0.270 157 13.08 1.13 0.352 ( 0.051) 0.035 0.317 158 13.17 1.13 0.352 ( 0.050) 0.035 0.317 159 13.25 1.13 0.352 ( 0.050) 0.035 0.317 160 13.33 1.13 0.352 ( 0.050) 0.035 0.317 161 13.42 1.13 0.352 ( 0.050) 0.035 0.317 162 13.50 1.13 0.352 ( 0.049) 0.035 0.317 163 13.58 0.77 0.238 ( 0.049) 0.024 0.214 164 13.67 0.77 0.238 ( 0.049) 0.024 0.214 165 13.75 0.77 0.238 ( 0.049) 0.024 0.214 166 13.83 0.77 0.238 ( 0.048) 0.024 0.214 167 13.92 0.77 0.238 ( 0.048) 0.024 0.214 168 14.00 0.77 0.238 ( 0.048) 0.024 0.214 169 14.08 0.90 0.279 ( 0.048) 0.028 0.251 170 14.17 0.90 0.279 ( 0.047) 0.028 0.251 171 14.25 0.90 0.279 ( 0.047) 0.028 0.251 172 14.33 0.87 0.269 ( 0.047) 0.027 0.242 173 14.42 0.87 0.269 ( 0.047) 0.027 0.242 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 517
Menifee Mayor and City Council
July 15, 2026
Page
1147 of 3153
174 14.50 0.87 0.269 ( 0.046) 0.027 0.242 175 14.58 0.87 0.269 ( 0.046) 0.027 0.242 176 14.67 0.87 0.269 ( 0.046) 0.027 0.242 177 14.75 0.87 0.269 ( 0.046) 0.027 0.242 178 14.83 0.83 0.259 ( 0.045) 0.026 0.233 179 14.92 0.83 0.259 ( 0.045) 0.026 0.233 180 15.00 0.83 0.259 ( 0.045) 0.026 0.233 181 15.08 0.80 0.248 ( 0.045) 0.025 0.224 182 15.17 0.80 0.248 ( 0.045) 0.025 0.224 183 15.25 0.80 0.248 ( 0.044) 0.025 0.224 184 15.33 0.77 0.238 ( 0.044) 0.024 0.214 185 15.42 0.77 0.238 ( 0.044) 0.024 0.214 186 15.50 0.77 0.238 ( 0.044) 0.024 0.214 187 15.58 0.63 0.197 ( 0.043) 0.020 0.177 188 15.67 0.63 0.197 ( 0.043) 0.020 0.177 189 15.75 0.63 0.197 ( 0.043) 0.020 0.177 190 15.83 0.63 0.197 ( 0.043) 0.020 0.177 191 15.92 0.63 0.197 ( 0.042) 0.020 0.177 192 16.00 0.63 0.197 ( 0.042) 0.020 0.177 193 16.08 0.13 0.041 ( 0.042) 0.004 0.037 194 16.17 0.13 0.041 ( 0.042) 0.004 0.037 195 16.25 0.13 0.041 ( 0.042) 0.004 0.037 196 16.33 0.13 0.041 ( 0.041) 0.004 0.037 197 16.42 0.13 0.041 ( 0.041) 0.004 0.037 198 16.50 0.13 0.041 ( 0.041) 0.004 0.037 199 16.58 0.10 0.031 ( 0.041) 0.003 0.028 200 16.67 0.10 0.031 ( 0.041) 0.003 0.028 201 16.75 0.10 0.031 ( 0.040) 0.003 0.028 202 16.83 0.10 0.031 ( 0.040) 0.003 0.028 203 16.92 0.10 0.031 ( 0.040) 0.003 0.028 204 17.00 0.10 0.031 ( 0.040) 0.003 0.028 205 17.08 0.17 0.052 ( 0.040) 0.005 0.047 206 17.17 0.17 0.052 ( 0.039) 0.005 0.047 207 17.25 0.17 0.052 ( 0.039) 0.005 0.047 208 17.33 0.17 0.052 ( 0.039) 0.005 0.047 209 17.42 0.17 0.052 ( 0.039) 0.005 0.047 210 17.50 0.17 0.052 ( 0.039) 0.005 0.047 211 17.58 0.17 0.052 ( 0.038) 0.005 0.047 212 17.67 0.17 0.052 ( 0.038) 0.005 0.047 213 17.75 0.17 0.052 ( 0.038) 0.005 0.047 214 17.83 0.13 0.041 ( 0.038) 0.004 0.037 215 17.92 0.13 0.041 ( 0.038) 0.004 0.037 216 18.00 0.13 0.041 ( 0.037) 0.004 0.037 217 18.08 0.13 0.041 ( 0.037) 0.004 0.037 218 18.17 0.13 0.041 ( 0.037) 0.004 0.037 219 18.25 0.13 0.041 ( 0.037) 0.004 0.037 220 18.33 0.13 0.041 ( 0.037) 0.004 0.037 221 18.42 0.13 0.041 ( 0.037) 0.004 0.037 222 18.50 0.13 0.041 ( 0.036) 0.004 0.037 223 18.58 0.10 0.031 ( 0.036) 0.003 0.028 224 18.67 0.10 0.031 ( 0.036) 0.003 0.028 225 18.75 0.10 0.031 ( 0.036) 0.003 0.028 226 18.83 0.07 0.021 ( 0.036) 0.002 0.019 227 18.92 0.07 0.021 ( 0.035) 0.002 0.019 228 19.00 0.07 0.021 ( 0.035) 0.002 0.019 229 19.08 0.10 0.031 ( 0.035) 0.003 0.028 230 19.17 0.10 0.031 ( 0.035) 0.003 0.028 231 19.25 0.10 0.031 ( 0.035) 0.003 0.028 232 19.33 0.13 0.041 ( 0.035) 0.004 0.037 233 19.42 0.13 0.041 ( 0.035) 0.004 0.037 234 19.50 0.13 0.041 ( 0.034) 0.004 0.037 235 19.58 0.10 0.031 ( 0.034) 0.003 0.028 236 19.67 0.10 0.031 ( 0.034) 0.003 0.028 237 19.75 0.10 0.031 ( 0.034) 0.003 0.028 238 19.83 0.07 0.021 ( 0.034) 0.002 0.019 239 19.92 0.07 0.021 ( 0.034) 0.002 0.019 240 20.00 0.07 0.021 ( 0.033) 0.002 0.019 241 20.08 0.10 0.031 ( 0.033) 0.003 0.028 242 20.17 0.10 0.031 ( 0.033) 0.003 0.028 Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 518
Menifee Mayor and City Council
July 15, 2026
Page
1148 of 3153
243 20.25 0.10 0.031 ( 0.033) 0.003 0.028 244 20.33 0.10 0.031 ( 0.033) 0.003 0.028 245 20.42 0.10 0.031 ( 0.033) 0.003 0.028 246 20.50 0.10 0.031 ( 0.033) 0.003 0.028 247 20.58 0.10 0.031 ( 0.032) 0.003 0.028 248 20.67 0.10 0.031 ( 0.032) 0.003 0.028 249 20.75 0.10 0.031 ( 0.032) 0.003 0.028 250 20.83 0.07 0.021 ( 0.032) 0.002 0.019 251 20.92 0.07 0.021 ( 0.032) 0.002 0.019 252 21.00 0.07 0.021 ( 0.032) 0.002 0.019 253 21.08 0.10 0.031 ( 0.032) 0.003 0.028 254 21.17 0.10 0.031 ( 0.032) 0.003 0.028 255 21.25 0.10 0.031 ( 0.031) 0.003 0.028 256 21.33 0.07 0.021 ( 0.031) 0.002 0.019 257 21.42 0.07 0.021 ( 0.031) 0.002 0.019 258 21.50 0.07 0.021 ( 0.031) 0.002 0.019 259 21.58 0.10 0.031 ( 0.031) 0.003 0.028 260 21.67 0.10 0.031 ( 0.031) 0.003 0.028 261 21.75 0.10 0.031 ( 0.031) 0.003 0.028 262 21.83 0.07 0.021 ( 0.031) 0.002 0.019 263 21.92 0.07 0.021 ( 0.030) 0.002 0.019 264 22.00 0.07 0.021 ( 0.030) 0.002 0.019 265 22.08 0.10 0.031 ( 0.030) 0.003 0.028 266 22.17 0.10 0.031 ( 0.030) 0.003 0.028 267 22.25 0.10 0.031 ( 0.030) 0.003 0.028 268 22.33 0.07 0.021 ( 0.030) 0.002 0.019 269 22.42 0.07 0.021 ( 0.030) 0.002 0.019 270 22.50 0.07 0.021 ( 0.030) 0.002 0.019 271 22.58 0.07 0.021 ( 0.030) 0.002 0.019 272 22.67 0.07 0.021 ( 0.030) 0.002 0.019 273 22.75 0.07 0.021 ( 0.030) 0.002 0.019 274 22.83 0.07 0.021 ( 0.029) 0.002 0.019 275 22.92 0.07 0.021 ( 0.029) 0.002 0.019 276 23.00 0.07 0.021 ( 0.029) 0.002 0.019 277 23.08 0.07 0.021 ( 0.029) 0.002 0.019 278 23.17 0.07 0.021 ( 0.029) 0.002 0.019 279 23.25 0.07 0.021 ( 0.029) 0.002 0.019 280 23.33 0.07 0.021 ( 0.029) 0.002 0.019 281 23.42 0.07 0.021 ( 0.029) 0.002 0.019 282 23.50 0.07 0.021 ( 0.029) 0.002 0.019 283 23.58 0.07 0.021 ( 0.029) 0.002 0.019 284 23.67 0.07 0.021 ( 0.029) 0.002 0.019 285 23.75 0.07 0.021 ( 0.029) 0.002 0.019 286 23.83 0.07 0.021 ( 0.029) 0.002 0.019 287 23.92 0.07 0.021 ( 0.029) 0.002 0.019 288 24.00 0.07 0.021 ( 0.029) 0.002 0.019 (Loss Rate Not Used)
Sum = 100.0 Sum = 27.9 Flood volume = Effective rainfall 2.33(In)
times area 8.8(Ac.)/[(In)/(Ft.)] = 1.7(Ac.Ft) Total soil loss = 0.26(In)
Total soil loss = 0.190(Ac.Ft)
Total rainfall = 2.59(In)
Flood volume = 74469.4 Cubic Feet
Total soil loss = 8274.4 Cubic Feet
-------------------------------------------------------------------- Peak flow rate of this hydrograph = 2.813(CFS)
-------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0 ----------------------------------------------------------------------- 0+ 5 0.0007 0.10 Q | | | | 0+10 0.0018 0.16 Q | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 519
Menifee Mayor and City Council
July 15, 2026
Page
1149 of 3153
0+15 0.0029 0.17 Q | | | | 0+20 0.0044 0.22 Q | | | | 0+25 0.0061 0.24 Q | | | | 0+30 0.0078 0.25 Q | | | | 0+35 0.0095 0.25 Q | | | | 0+40 0.0112 0.25 Q | | | | 0+45 0.0129 0.25 Q | | | | 0+50 0.0150 0.30 VQ | | | | 0+55 0.0173 0.33 VQ | | | | 1+ 0 0.0195 0.33 VQ | | | | 1+ 5 0.0215 0.28 VQ | | | | 1+10 0.0232 0.25 VQ | | | | 1+15 0.0249 0.25 Q | | | | 1+20 0.0266 0.25 Q | | | | 1+25 0.0283 0.25 Q | | | | 1+30 0.0300 0.25 Q | | | | 1+35 0.0318 0.25 Q | | | | 1+40 0.0335 0.25 Q | | | | 1+45 0.0352 0.25 Q | | | | 1+50 0.0372 0.30 VQ | | | | 1+55 0.0395 0.33 VQ | | | | 2+ 0 0.0418 0.33 VQ | | | | 2+ 5 0.0440 0.33 |Q | | | | 2+10 0.0463 0.33 |Q | | | | 2+15 0.0486 0.33 |Q | | | | 2+20 0.0509 0.33 |Q | | | | 2+25 0.0532 0.33 |Q | | | | 2+30 0.0554 0.33 |Q | | | | 2+35 0.0581 0.38 |Q | | | | 2+40 0.0609 0.41 |Q | | | | 2+45 0.0638 0.41 |Q | | | | 2+50 0.0666 0.41 |Q | | | | 2+55 0.0694 0.41 |Q | | | | 3+ 0 0.0723 0.41 |Q | | | | 3+ 5 0.0751 0.41 |Q | | | | 3+10 0.0780 0.41 |Q | | | | 3+15 0.0808 0.41 |Q | | | | 3+20 0.0837 0.41 |Q | | | | 3+25 0.0865 0.41 |QV | | | | 3+30 0.0894 0.41 |QV | | | | 3+35 0.0922 0.41 |QV | | | | 3+40 0.0951 0.41 |QV | | | | 3+45 0.0979 0.41 |QV | | | | 3+50 0.1011 0.46 |QV | | | | 3+55 0.1045 0.49 |QV | | | | 4+ 0 0.1080 0.50 |QV | | | | 4+ 5 0.1114 0.50 |QV | | | | 4+10 0.1148 0.50 |QV | | | | 4+15 0.1182 0.50 |QV | | | | 4+20 0.1220 0.55 | Q | | | | 4+25 0.1260 0.58 | Q | | | | 4+30 0.1299 0.58 | QV | | | | 4+35 0.1339 0.58 | QV | | | | 4+40 0.1379 0.58 | QV | | | | 4+45 0.1419 0.58 | QV | | | | 4+50 0.1462 0.63 | QV | | | | 4+55 0.1508 0.66 | QV | | | | 5+ 0 0.1553 0.66 | QV | | | | 5+ 5 0.1592 0.56 | QV | | | | 5+10 0.1627 0.50 | QV | | | | 5+15 0.1661 0.50 |Q V | | | | 5+20 0.1699 0.55 | QV | | | | 5+25 0.1738 0.58 | Q V | | | | 5+30 0.1778 0.58 | Q V | | | | 5+35 0.1821 0.63 | Q V | | | | 5+40 0.1867 0.66 | Q V | | | | 5+45 0.1912 0.66 | Q V | | | | 5+50 0.1958 0.66 | Q V | | | | 5+55 0.2004 0.66 | Q V | | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 520
Menifee Mayor and City Council
July 15, 2026
Page
1150 of 3153
6+ 0 0.2049 0.66 | Q V | | | | 6+ 5 0.2098 0.71 | Q V | | | | 6+10 0.2149 0.74 | Q V | | | | 6+15 0.2201 0.74 | Q V | | | | 6+20 0.2252 0.74 | Q V | | | | 6+25 0.2303 0.74 | Q V | | | | 6+30 0.2354 0.74 | Q V | | | | 6+35 0.2409 0.80 | Q V | | | | 6+40 0.2466 0.82 | Q V | | | | 6+45 0.2523 0.83 | Q V | | | | 6+50 0.2580 0.83 | Q V | | | | 6+55 0.2637 0.83 | Q V | | | | 7+ 0 0.2694 0.83 | Q V | | | | 7+ 5 0.2751 0.83 | Q V | | | | 7+10 0.2808 0.83 | Q V | | | | 7+15 0.2865 0.83 | Q V | | | | 7+20 0.2925 0.88 | Q V | | | | 7+25 0.2988 0.91 | Q V | | | | 7+30 0.3051 0.91 | Q V | | | | 7+35 0.3117 0.96 | Q V | | | | 7+40 0.3185 0.99 | Q V | | | | 7+45 0.3253 0.99 | Q V | | | | 7+50 0.3325 1.04 | Q V | | | | 7+55 0.3399 1.07 | Q V | | | | 8+ 0 0.3473 1.08 | Q V | | | | 8+ 5 0.3554 1.18 | Q V | | | | 8+10 0.3639 1.23 | Q V | | | | 8+15 0.3725 1.24 | Q V | | | | 8+20 0.3810 1.24 | Q V | | | | 8+25 0.3896 1.24 | Q V| | | | 8+30 0.3981 1.24 | Q V| | | | 8+35 0.4070 1.29 | Q V| | | | 8+40 0.4161 1.32 | Q V| | | | 8+45 0.4252 1.32 | Q V| | | | 8+50 0.4347 1.37 | Q V | | | 8+55 0.4444 1.40 | Q V | | | 9+ 0 0.4540 1.41 | Q V | | | 9+ 5 0.4644 1.51 | Q V | | | 9+10 0.4752 1.57 | Q |V | | | 9+15 0.4860 1.57 | Q |V | | | 9+20 0.4972 1.62 | Q |V | | | 9+25 0.5086 1.65 | Q |V | | | 9+30 0.5200 1.65 | Q | V | | | 9+35 0.5317 1.71 | Q | V | | | 9+40 0.5437 1.73 | Q | V | | | 9+45 0.5556 1.74 | Q | V | | | 9+50 0.5680 1.79 | Q | V | | | 9+55 0.5805 1.82 | Q | V | | | 10+ 0 0.5930 1.82 | Q | V | | | 10+ 5 0.6031 1.46 | Q | V | | | 10+10 0.6118 1.26 | Q | V | | | 10+15 0.6204 1.24 | Q | V | | | 10+20 0.6289 1.24 | Q | V | | | 10+25 0.6375 1.24 | Q | V | | | 10+30 0.6460 1.24 | Q | V | | | 10+35 0.6563 1.50 | Q | V | | | 10+40 0.6676 1.64 | Q | V | | | 10+45 0.6790 1.65 | Q | V | | | 10+50 0.6904 1.65 | Q | V | | | 10+55 0.7018 1.65 | Q | V | | | 11+ 0 0.7132 1.65 | Q | V | | | 11+ 5 0.7242 1.60 | Q | V | | | 11+10 0.7351 1.58 | Q | V | | | 11+15 0.7459 1.57 | Q | V | | | 11+20 0.7567 1.57 | Q | V | | | 11+25 0.7676 1.57 | Q | V | | | 11+30 0.7784 1.57 | Q | V | | | 11+35 0.7885 1.47 | Q | V | | | 11+40 0.7982 1.41 | Q | V | | | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 521
Menifee Mayor and City Council
July 15, 2026
Page
1151 of 3153
11+45 0.8079 1.41 | Q | V | | | 11+50 0.8180 1.46 | Q | V| | | 11+55 0.8282 1.49 | Q | V| | | 12+ 0 0.8385 1.49 | Q | V| | | 12+ 5 0.8512 1.85 | Q | V| | | 12+10 0.8653 2.04 | Q | V | | 12+15 0.8795 2.07 | Q | V | | 12+20 0.8941 2.12 | Q | V | | 12+25 0.9089 2.15 | Q | |V | | 12+30 0.9237 2.15 | Q | |V | | 12+35 0.9392 2.25 | Q| |V | | 12+40 0.9551 2.31 | Q| | V | | 12+45 0.9711 2.32 | Q| | V | | 12+50 0.9874 2.37 | Q| | V | | 12+55 1.0039 2.40 | Q| | V | | 13+ 0 1.0204 2.40 | Q| | V | | 13+ 5 1.0387 2.65 | Q | V | | 13+10 1.0580 2.80 | |Q | V | | 13+15 1.0773 2.81 | |Q | V | | 13+20 1.0967 2.81 | |Q | V | | 13+25 1.1161 2.81 | |Q | V | | 13+30 1.1355 2.81 | |Q | V | | 13+35 1.1510 2.25 | Q| | V | | 13+40 1.1643 1.94 | Q | | V | | 13+45 1.1774 1.90 | Q | | V | | 13+50 1.1906 1.90 | Q | | V | | 13+55 1.2037 1.90 | Q | | V | | 14+ 0 1.2168 1.90 | Q | | V | | 14+ 5 1.2313 2.11 | Q | | V | | 14+10 1.2466 2.22 | Q | | V| | 14+15 1.2620 2.23 | Q | | V| | 14+20 1.2770 2.18 | Q | | V| | 14+25 1.2918 2.15 | Q | | V | 14+30 1.3066 2.15 | Q | | V | 14+35 1.3215 2.15 | Q | | V | 14+40 1.3363 2.15 | Q | | |V | 14+45 1.3511 2.15 | Q | | |V | 14+50 1.3656 2.10 | Q | | |V | 14+55 1.3798 2.07 | Q | | | V | 15+ 0 1.3941 2.07 | Q | | | V | 15+ 5 1.4080 2.02 | Q | | | V | 15+10 1.4217 1.99 | Q | | | V | 15+15 1.4354 1.99 | Q | | | V | 15+20 1.4487 1.93 | Q | | | V | 15+25 1.4618 1.91 | Q | | | V | 15+30 1.4749 1.90 | Q | | | V | 15+35 1.4866 1.70 | Q | | | V | 15+40 1.4975 1.59 | Q | | | V | 15+45 1.5084 1.57 | Q | | | V | 15+50 1.5192 1.57 | Q | | | V | 15+55 1.5300 1.57 | Q | | | V | 16+ 0 1.5409 1.57 | Q | | | V | 16+ 5 1.5464 0.81 | Q | | | V | 16+10 1.5491 0.38 |Q | | | V | 16+15 1.5513 0.33 |Q | | | V | 16+20 1.5536 0.33 |Q | | | V | 16+25 1.5559 0.33 |Q | | | V | 16+30 1.5582 0.33 |Q | | | V | 16+35 1.5601 0.28 |Q | | | V | 16+40 1.5618 0.25 |Q | | | V | 16+45 1.5635 0.25 Q | | | V | 16+50 1.5652 0.25 Q | | | V | 16+55 1.5670 0.25 Q | | | V | 17+ 0 1.5687 0.25 Q | | | V | 17+ 5 1.5711 0.35 |Q | | | V | 17+10 1.5739 0.41 |Q | | | V | 17+15 1.5767 0.41 |Q | | | V | 17+20 1.5796 0.41 |Q | | | V | 17+25 1.5824 0.41 |Q | | | V | Item Title: 11.1
Trumble and Watson Warehouse Appeals
Item Page Number: 522
Menifee Mayor and City Council
July 15, 2026
Page
1152 of 3153