AGENDA REPORT
MEETING DATE: June 23, 2026
TITLE: SB 1 Project List Adoption for FY 2026-27
PRESENTED BY: Shanita Tillman, Sr. Management Analyst
RECOMMENDATION: ADOPT RESOLUTION OF PROJECTS FUNDED BY SB 1: THE ROAD REPAIR AND ACCOUNTABILITY ACT OF 2017 FOR FY 2026-27
2030 VISION STATEMENT:
This staff report aligns with Goal #1, “Ensure Our Fiscal Viability,” by identifying additional revenue sources, and Goal #2, “Maintain Public Safety,” by investing in improvements to public infrastructure.
BACKGROUND:
The Road Maintenance and Rehabilitation Account (RMRA) was established through Senate Bill 1 (SB 1), also known as the Road Repair and Accountability Act of 2017. RMRA is funded by increased state fuel taxes and vehicle registration fees and is administered by the California State Controller’s Office. It is a designated component of the broader Highway Users Tax Account (Gas Tax).
RMRA funds are allocated annually to local jurisdictions and are restricted to eligible transportation projects, such as pavement rehabilitation, roadway safety improvements, ADA accessibility upgrades, and complete streets enhancements.
DISCUSSION:
Through SB 1, cities receive additional gas tax revenue to address deferred maintenance of local streets and road systems. The City of Grand Terrace is projected to receive $369,317 in SB 1 RMRA funds for Fiscal Year 2026-27.
Each year, the City Council is presented with an updated list of proposed street segments to be rehabilitated using these funds. For FY 2026-27, the following streets are included in the Capital Improvement Program (CIP):
Street From To
OBSERVATION DR PALM AVE VAN BUREN ST
ENVIRONMENTAL IMPACT:
The proposed improvements are categorically exempt from the California Environmental Quality Act (CEQA) under Section 15301, Existing Facilities.
FISCAL IMPACT:
The City is projected to receive $369,317 in SB 1 RMRA funds for FY 2026-27. These funds will be applied to the Street Improvement Project.
The Capital Improvement Program is supported through a combination of funding sources, including:
• RMRA (SB 1) – Fund 56
• Gas Tax – Fund 16
• Measure I – Fund 20 (administered by the San Bernardino County Transportation Authority) • City Reserves
Additional local funding may be allocated if necessary to fully fund construction and associated costs.
RESOLUTION NO. 2026-XX
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF
GRAND TERRACE ADOPTING A LIST OF PROJECTS FOR
FISCAL YEAR 2026-27 FUNDED BY SB 1: THE ROAD REPAIR
AND ACCOUNTABILITY ACT OF 2017
WHEREAS, Senate Bill 1 (SB 1), the Road Repair and Accountability Act of 2017 (Chapter 5, Statutes of 2017), was passed by the Legislature and signed into law by the Governor in April 2017 to address significant multi-modal transportation funding shortfalls statewide; and
WHEREAS, SB 1 includes accountability and transparency provisions to ensure that the residents of the City of Grand Terrace are aware of the projects proposed for funding in their community and which projects have been completed each fiscal year; and WHEREAS, the City of Grand Terrace must adopt, by resolution, a list of projects proposed to receive fiscal year funding from the Road Maintenance and Rehabilitation Account (RMRA), created by SB 1, which must include a description and location of each proposed project, a proposed schedule for project completion, and the estimated useful life of the improvement; and
WHEREAS, the City of Grand Terrace will receive an estimated $369,317 in RMRA funding in Fiscal Year 2026–27 from SB 1; and
WHEREAS, this is the seventh year in which the City of Grand Terrace is receiving SB 1 funding, which enables the City to continue essential road maintenance and rehabilitation projects, safety improvements, replacement of aging infrastructure, and enhancements to access and mobility for the traveling public—efforts that would not otherwise be possible without SB 1; and
WHEREAS, the City of Grand Terrace has conducted a thorough evaluation to ensure that streets heavily trafficked by residents are prioritized and included in the transportation project list; and
WHEREAS, funding from SB 1 will help the City maintain and rehabilitate several streets and expand active transportation infrastructure throughout the City in future years; and
WHEREAS, the 2023 California Statewide Local Streets and Roads Needs Assessment found that the City’s streets and roads are in an “at-risk” condition, and this revenue will help increase the overall quality of the road system, bringing it to a “good” condition over the next decade and improving safety and mobility citywide; and
WHEREAS, the SB 1 project list and overall investment in local streets and roads infrastructure will have a significant positive impact on the City of Grand Terrace. This funding allows the City to focus on basic maintenance and safety, invest in complete streets infrastructure, and utilize high-quality materials and practices. Without SB 1 funding, the City’s ability to undertake these crucial projects would be severely limited, hindering efforts to enhance the quality and safety of our transportation network. This investment ensures continued maintenance and improvement of heavily trafficked streets, supports safer and more efficient travel routes, and contributes to the long-term sustainability of the City’s infrastructure.
NOW, THEREFORE IT IS HEREBY RESOLVED, ORDERED AND FOUND BY
THE CITY COUNCIL OF THE CITY OF GRAND TERRACE, STATE OF CALIFORNIA, AS FOLLOWS:
SECTION 1. The City Council finds that the above recitals are true and correct and, accordingly, are incorporated herein as findings and made a material part of this Resolution.
SECTION 2. The following list of newly proposed projects will be funded in-part or solely with fiscal year 2026-27 Road Maintenance and Rehabilitation Account revenues:
Project Title: 2026-27 Street Improvement Project
Project Description: Rehabilitate Observation from Palm Ave to Van Buren St.
Project Location: Observation St, Grand Terrace, CA 92313 Estimated Project
Schedule: Start: 11/2026 - Completion: 01/2027
Estimated Project
Useful Life: 10-20 years
SECTION 3. This Resolution shall go into full force and effect immediately.
SECTION 4. The City Clerk shall certify to the adoption of this Resolution.
PASSED, APPROVED AND ADOPTED by the City Council of the City of Grand Terrace at a regular meeting held on the 23rd day of June 2026.
___________________________
Bill Hussey
Mayor
ATTEST:
Daysi Alcocer
City Clerk
APPROVED AS TO FORM:
Adrian R. Guerra
City Attorney
AGENDA REPORT
MEETING DATE: June 23, 2026
TITLE: Acceptance of the Storm Drain Master Plan
PRESENTED BY: Shanita Tillman, Sr. Management Analyst
RECOMMENDATION: RECEIVE AND FILE THE STORM DRAIN MASTER PLAN PREPARED BY Q3 CONSULTING
2030 VISION STATEMENT:
This report supports goal #2 maintain public safety.
BACKGROUND:
On June 25, 2024, the City Council approved a Professional Services Agreement with Q3 Consulting to prepare a comprehensive Storm Drain Master Plan (SDMP) for the City of Grand Terrace. The purpose of the SDMP was to evaluate the City's existing drainage system, identify areas susceptible to flooding, assess infrastructure deficiencies, and develop recommendations for future storm drain improvements.
Prior to this effort, the City had limited planning-level information regarding the capacity and performance of its drainage infrastructure. The SDMP provides a citywide evaluation of stormwater conveyance facilities and establishes a framework for addressing current and future drainage needs.
DISCUSSION:
The City retained Q3 Consulting to prepare a comprehensive Storm Drain Master Plan (SDMP) to evaluate existing drainage infrastructure, identify deficiencies, assess flood-prone areas, and develop recommendations for future storm drain improvements. The completed SDMP provides a citywide assessment of drainage conditions and establishes a framework for future capital improvement planning.
The Storm Drain Master Plan identified approximately $11 million in recommended storm drain improvements throughout the City, exclusive of regional drainage improvements currently being constructed through the Gateway Project. These recommendations provide the City with a prioritized roadmap for future infrastructure investments intended to reduce flooding risks and improve overall stormwater management.
The study further determined that several drainage challenges are influenced by existing regional constraints, including County-owned storm drain facilities, existing channel alignments, and downstream capacity limitations. As a result, certain long-term drainage solutions may require coordination with external agencies and regional partners.
The SDMP evaluated existing drainage conditions, reviewed available drainage studies and as-built information, performed hydraulic modeling, and identified locations experiencing known flooding
issues. Based on the analysis, the consultant developed conceptual improvement recommendations and planning-level cost estimates.
The report prioritizes future improvements based on system deficiencies and anticipated flood reduction benefits. The Pico Street drainage improvements were identified as the highest priority project, followed by improvements along Van Buren Street and the Grand Terrace Road crossing.
This prioritization will assist the City in evaluating future capital improvement programming and funding opportunities.
In addition to identifying infrastructure needs, the SDMP provides technical documentation, hydraulic modeling, project prioritization, and planning-level cost estimates that may be utilized to support future grant applications and funding requests. The completed plan positions the City to pursue external funding opportunities for stormwater infrastructure improvements while advancing long-term asset management and resiliency goals.
ENVIRONMENTAL IMPACT:
No environmental impact.
FISCAL IMPACT:
There is no fiscal impact associated with acceptance of the Storm Drain Master Plan.
The report identifies approximately $11 million in conceptual drainage improvements that may be considered by the City over time. Future implementation of any recommended improvements will be subject to separate funding identification, environmental review, design, and City Council approval.
Grand Terrace Storm Drain Master Plan
Grand Terrace, California
FINAL REPORT
Version 2
June 2026
Prepared for :
City of Grand Terrace
22795 Barton Road
Grand Terrace, CA 92313
Contact: Shanita Tillman
Prepared by:
27051 Towne Centre Drive, Suite 270
Foothill Ranch, CA 92610
Contact: Thomas J. Ryan, PE
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Table of Contents
1 Introduction ............................................................................................................................................ 1
1.1 Project Overview .......................................................................................................................... 1
1.2 Background ................................................................................................................................... 3
1.3 Known Flooded Areas .................................................................................................................. 4
1.4 Goals and Objectives .................................................................................................................... 4
1.5 Design Criteria .............................................................................................................................. 5
1.6 Data Research ............................................................................................................................... 6
1.7 Technical Software Description ................................................................................................... 6 2 Hydrology & Hydraulic Analysis ........................................................................................................... 7
2.1 Methodology ................................................................................................................................. 7
2.1.1 Direct Rainfall Method (XPSTORM Hydrology) ........................................................ 8
2.1.2 Proposed Regional Basin Evaluations .......................................................................... 8
2.2 Hydrologic Boundary Conditions ................................................................................................. 9
2.3 Hydrologic Models ..................................................................................................................... 10
2.4 Watershed and Flood Routing Parameters ................................................................................. 12
2.4.1 Precipitation ............................................................................................................... 12
2.4.2 Topography ................................................................................................................ 12
2.4.3 Vertical Datum ........................................................................................................... 12
2.4.4 Soil Types ................................................................................................................... 12
2.4.5 Land Uses ................................................................................................................... 12
2.4.6 Manning’s “n” Value.................................................................................................. 12
2.4.7 Grid Size (Detailed Method) ...................................................................................... 12
2.4.8 Computational Time Step (Detailed Method) ............................................................ 13
2.5 Modeling Analyses ..................................................................................................................... 13
2.5.1 XPSTORM Existing Condition Model Results .......................................................... 13
2.5.2 XPSTORM Ultimate (Proposed) Condition Models .................................................. 16 3 Estimated Construction Costs............................................................................................................... 19 4 Recommended Proposed Improvements .............................................................................................. 20
4.1 Pico Street Improvements ........................................................................................................... 20
4.2 Van Buren Street Improvements ................................................................................................ 22
4.3 Known Flooded Area Proposed Improvement Recommendations ............................................. 24 5 Conclusions .......................................................................................................................................... 28
5.1 Priority and Construction Phasing .............................................................................................. 29 Figures
Figure 1-1. Vicinity Map .............................................................................................................................. 2 Figure 1-2. Project Location Map ................................................................................................................. 2 Figure 1-3. Gateway Project Phased Regional Drainage Improvements ...................................................... 3 Figure 2-1. XPSTORM Model Extents....................................................................................................... 10 Figure 2-2. Gateway Project Footprint and Points of Comparison (POC) .................................................. 11 Figure 2-3. 100-Year, Existing Conditions XPSTORM Results ................................................................ 15 Figure 2-4. Ultimate Condition Phase 1 and Phase 2 Improvement Identifications ................................... 18 Figure 4-1. Phase 2 Pico Street and Van Buren Street Improvements ........................................................ 23
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Figure 4-2. Site 1 – Known Flood Location (Mount Vernon Avenue north of Barton Rd.) ....................... 24 Figure 4-3. Site 2 – Known Flood Location (Gage Canal/Pico Street)....................................................... 25 Figure 4-4. Site 3 – Known Flood Location (Vivienda Avenue) ................................................................ 26 Figure 4-5. Site 4 – Known Flood Location (Grand Terrace Rd. Low Crossing) ...................................... 26 Figure 4-6. Grand Terrace Road Crossing Proposed Improvements .......................................................... 27 Tables
Table 2-1. NOAA Atlas 14, 100-Year Point Precipitation Data used in XP Models ................................. 12 Table 2-2. Existing Conditions 100-Year POC Peak Flowrates (XPSTORM) ........................................... 14 Table 2-3. Proposed Basin Storage-Area Curve ......................................................................................... 16 Table 2-2. Ultimate versus Existing Conditions 100-Year POC Peak Flowrates (XPSTORM) ................ 17 Table 3-1. Construction Cost Unit Pricing .................................................................................................. 19 Table 3-2. Construction Cost Contingencies .............................................................................................. 19 Table 4-1. Phase 2 Pico Street Proposed Improvement Cost Estimates ..................................................... 21 Table 4-2. Phase 2 Van Buren Proposed Improvement Cost Estimates ..................................................... 22 Table 5-1. Ultimate Conditions Regional Basin 100-Year Results (XPSTORM) ...................................... 28 Table 5-2. Ultimate SDMP Proposed Improvement Construction Cost Summary ..................................... 28 Table 5-3. Prioritized Phasing of Proposed Improvements ........................................................................ 29 Technical Appendix
Appendix A- Hydrology
Appendix B – XPSTORM Profiles & Result Data
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1 INTRODUCTION
1.1 Project Overview
The City of Grand Terrace (City) is located in San Bernardino County on the southern border with Riverside County. The City’s drainage system primarily consists of street conveyance with limited surface and sub-surface conveyance facilities. The topography of the urbanized area is relatively steep, ranging from 6-percent on the upper (eastern) slopes at the base of the foothills to 1-percent on the western side of the City near the I-215 freeway. The City is situated between Blue Mountain to the east and La Loma Hills to the west. Figures 1-1 and 1-2 show the vicinity and location of the project and the Storm Drain Master Plan (SDMP) extents.
Previous hydrologic studies have been developed for the City, but the intent of this study is to provide a more detailed evaluation of a portion of the City. A draft master plan of drainage for the area was prepared by Albert A. Webb Associates in August of 2011. The City master plan area was divided into 3 watersheds, Newport, Dewberry, and Pico. The master plan used standard San Bernardino County hydrology methods to develop peak 100-year flow rates for the watershed areas within the City. WSPG hydraulic calculations were developed with the peak flow rates to determine the required storm drain facility sizes for the conceptual master drainage plan. The traditional modeling approach used in this study identified large conduit sizes that may not be constructible, due to the existing utilities and right-ofway constraints within the streets.
Gateway at Grand Terrace Project
The Gateway at Grand Terrace Specific Plan is a guide for City-wide development of underutilized land in the southwest corner of the City of Grand Terrace. The project site is approximately 109 acres and is roughly bound by the I-215 freeway to the west, Pico Street to the south, approximately 700ft to the west of Michigan Street, and Commerce Way to the north.
This project has become the genesis of the City’s drive to prepare a new Storm Drain Master Plan. As part of the Gateway project conditions, the developer was responsible for evaluating and sizing new regional storm drain systems along Pico Street, Van Buren Street, and De Berry Street and constructing a regional flood control basin. This SDMP includes these proposed improvements and extends the watershed analysis to the remainder of the city.
As part of the Gateway project, regional storm drain systems are being constructed along De Berry Street, Van Buren Street, and downstream of Pico Street as discussed in the “Gateway at Grand Terrace Specific Plan Hydrology and Hydraulics Report”, prepared by Q3 Consulting for Lewis Management Corporation in March 2023 (Q3, 2023). The proposed De Berry system consists of approximately 840 linear feet of storm drain that runs parallel to the County storm drain, discharging into the proposed detention basin.
The proposed Van Buren system consists of 2,500 linear feet of storm drain that extends from the proposed basin east to Michigan Street. The proposed Pico Street system consists of 2,200 linear feet of storm drain from the basin to the west end of Pico Street (cul-de-sac).
The Q3, 2023 study identifies proposed improvements for the three main watersheds (Pico, Van Buren, and De Berry) and identified their proposed implementation of these improvements in two phases. Phase 1 consists of final design and construction of a portion of the regional drainage improvements for each of the three regional drainage system (See Figure 1-3).
Regional drainage improvements were evaluated and are currently being developed (and funded) as part of the Gateway at Grand Terrace development project (Gateway Project). Details of these Phase 1 projects are identified in the Q3,2023 report. The developer for the Gateway Project was conditioned to design and construct a portion of these proposed improvements, referred to as Phase 1 improvements.
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Phase 2 proposed improvements identified in these three watersheds are to be designed and constructed by the City. Since these improvements will be City projects, their associated construction costs will be included in this SDMP capital improvement costs estimates.
Figure 1-1. Vicinity Map
Figure 1-2. Project Location Map
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Figure 1-3. Gateway Project Phased Regional Drainage Improvements Figure 1-3 is a representation of the two phases of regional drainage improvements associated with the Gateway project. Phase 1 may slightly change before final design approval. Phase 1 (in red above) shows the regional storm drain facilities to be constructed as part of the Gateway project. Phase 2 (yellow) shows the remaining improvements to be constructed by the City in the future. Phase 1 and Phase 2 (together) are the proposed ultimate improvements for each respective watershed. For example, Phase 1 of the Pico watershed includes constructing regional storm drain infrastructure from the proposed detention basin (downstream) to the cul-de-sac at the west end of Pico Street. The remaining ultimate storm drain for the Pico watershed (yellow) will be constructed in the future by the City. It should be noted, the Phase 1 facilities (sizes) shown above are subject to change as the project is still in the review phase. Nonetheless, the hydrology and hydraulic calculations and alignments are unchanged.
This SDMP will focus on evaluating the remaining City drainage infrastructure within the City by developing a city-wide hydrologic and hydraulic model, to identify feasible regional drainage solutions.
1.2 Background
When steep streets are the only form of runoff conveyance, some issues can arise. Bifurcation occurs when flow depths rise above curb heights, allowing flows to travel through properties, into adjacent watersheds, ultimately overburdening those conveyance systems.
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Bifurcation occurs in locations where street slopes go from steep to flatter flow velocities reduce, depth increases, and the sediment within the runoff also begins to drop out on the streets.
With the current hydrologic and hydraulic software available, more advanced processes can be modeled to identify complex drainage situation, such as flow bifurcation to better understand the necessary improvements needed to protect against flooding. For this analysis, it was recommended that a more advanced model be used capable of creating a comprehensive, linked 1-Dimensional/2-Dimensional hydrodynamic model.
1.3 Known Flooded Areas
As part of this SDMP, Q3 will review and evaluate some of the most common flooding issues within the City. These areas were identified by the City as “known flooded areas”. The purpose is not focus on minor local ponding, but rather the larger issues that can be a regional safety concern. Smaller ponded issues are typically solved by local drainage projects and solutions.
Three areas known for most of the regional flooding are associated with the Pico Street (east), De Berry Street (east), and Van Buren Street (east) watersheds. These areas have been analyzed as part of the (Q3,2023) report. Four other areas of known flooding have been targeted for further evaluation as part of this SDMP and are listed below:
Site 1: This site is located along Mount Vernon Avenue, north of Barton Road occurs at inlets along the main street, a part of the Barton Storm Drain system. Evaluation of this site showed that the existing Barton Storm Drain (County owned) is undersized.
Site 2: This site is located within the Gage Canal easement just north of Pico Street. Flows from the neighborhood east drain through this easement and onto Pico Street. Flooding of the residential areas west of the easement have been recorded.
Site 3: Vivienda Avenue is located at the northwest end of the City and is known to flood during moderate to large storm events. Recent development at the end of the cul-de-sac has tried to remove some of the flooding hazard that occurs in this area. Due to the flat topography in the area and the lack of slope in the relatively recent constructed bioswale, flows still pond.
Site 4: The Grand Terrace Road low crossing is located north of the Vivienda Avenue/Grand Terrace Road intersection. This area consists of a small 24-inch pipe undercrossing. Subject to clogging, this pipe backs up and overtops the roadway.
1.4 Goals and Objectives
The purpose of this report is to present a detailed engineering analysis of the existing drainage infrastructure within the City and to provide recommendations for future drainage improvements.
The primary objectives of this study include the following:
Research, collect, and review previous studies completed in the watershed and along with the project.
Establish the design criteria and requirements to be used for the city-owned proposed drainage infrastructure.
Extend the analysis of the proposed improvements of the Gateway project and incorporate them into a City-wide model.
Develop the existing condition and proposed condition models using XPSTORM and direct rainon-grid approach to help size the non-County storm drain systems tributary to the proposed detention/retention basin.
Evaluate only the City-owned storm drain systems.
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1.5 Design Criteria
The hydrology and hydraulic criteria for the design of storm drain systems is based on the County of San Bernardino requirements. In general, the hydrology guidelines are stated in the San Bernardino County Hydrology Manual. San Bernardino County Flood Control District (SBCFCD) uses Los Angeles County criteria for hydraulic and design standards in urbanized areas.
The City of Grand Terrace requested the use of a more robust and detailed hydrologic and hydraulic modeling software for this SDMP to more accurately size and predict impact of proposed improvements.
The evaluation and preliminary design of drainage infrastructure was based on the 1-percent annual chance (100-year) storm event. Rainfall data was extrapolated from the latest version of the National Oceanic and Atmospheric Administration (NOAA) atlas for precipitation frequency estimates (NOAA Atlas 14).
Criteria used for evaluation of public streets typically include containment of a 10-year storm event within the top of curb of the street section. In addition, the 100-year 24-hour event shall be contained with the City’s right-of-way, with a minimum of one (1) foot of freeboard to the adjacent pad elevations.
Due to steep streets and existing surface drainage infrastructure within the City, much of the 100-year storm event is contained within the streets, as can be see by the, in some cases, 18-inch high curbs.
Design Restrictions:
The City of Grand Terrace contains several design restrictions that had to be considered when proposing flood control solutions. Below is a list of project restrictions that impacted the siting of proposed facilities.
Pico Street: A few design restrictions within Pico Street limited the available options for proposed drainage improvements. Within the street right-of-way, west of Michigan Avenue, existing utilities are induced restrictions to the maximum proposed pipe size. Based on the available space within the street cross section, the maximum diameter pipe that can be implemented is estimated to be 54-inches.
Consequently, solutions consisting of maximizing surface flows, in addition to subsurface pipe conveyance, had to be optimized.
Gage Canal: Another restriction is the Gage Canal easement that crosses the City from north to south, generally bound between Michigan Avenue and Mt. Vernan Avenue. The subsurface canal crosses Pico Street, Van Buren Street, De Berry Street, and Barton Road, restricting the possibility of aligning any new storm drain along these roads through this easement.
County Storm Drains: Several of the main storm drains within the City are County owned. The Barton Storm Drain, the De-Berry Storm Drain, and the Highgrove Channel are County owned facilities. Special care was taken to evaluate solutions that did not adversely impact these existing facilities. Any increase in flows or modifications to any of the existing inlets or laterals associated with these facilities would require County coordination and permitting resulting in upsizing the entire facility.
Riverside Canal: The Riverside Canal currently accepts all flows from the Pico Street watershed, including runoff from the Grand Terrace High School. During initial planning for the Gateway Project, the City of Riverside requested that all flows currently tributary to this facility be re-routed back to Highgrove Channel, stating that the Riverside Canal was not originally designed to be a flood control facility.
Caltrans Freeway Culvert Crossing The Grand Terrace Storm Drain, also known as the Highgrove Channel accepts flows from the Barton, De Berry, and Van Buren storm drain systems. The channel ultimately drains to a double 6’H x 6’W reinforced concrete box (RCB) that crosses the I-215 freeway.
This Caltrans facility creates a maximum flow restriction at this location. Any plan to improve this
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facility would require extensive permitting and downstream improvements beyond the limits of the City.
Consequently, this location was identified as a hydrologic critical point of concentration for the regional models herein with the goal to not increase flows currently tables to go to this facility.
1.6 Data Research
The data research and acquisition process included coordination with County, adjacent city, City of Grand Terrace staff, and field review. The goal of the research was to identify all available data, including previous drainage related studies, drainage related as-built plans, and information regarding previous flooding issues. Items acquired included the following:
Storm Drain As-Builts
Previous Drainage Studies
Storm Drain Maintenance Notes (based on discussion)
Field Drainage Facility Investigations, and
Historical flow patterns.
1.7 Technical Software Description
The city-wide study was performed using an advanced hydrologic and hydraulic modeling approach as a result of the area’s unique hydrologic and drainage characteristics. Autodesk’s XPSTORM software model was used to model both the complex hydrology and hydraulic simulations. The XPSTORM model solves the full St. Venant Equations (or shallow flow equations). In other words, the program solves the highest level of computations available for storm drain modeling. The model utilizes full rainstorm patterns, not just peak flows, to calculate expected runoff and storm drain capture and conveyance efficiencies. Surface flows are evaluated in two dimensions (2D) based on a 3D surface or digital terrain model (DTM).
Linking the surface to the subsurface storm drains, lakes or basins, and channels produces a comprehensive and realistic analysis of the entire drainage system. Rain-on-Grid Hydrology
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2 HYDROLOGY & HYDRAULIC ANALYSIS
Four (4) regional watersheds (Pico Street, Van Buren Street, De Berry Street, and Barton Road) encompass a majority of the City’s runoff. The remainder of the City runoff is to the north, where flows are conveyed north to northwest where they ultimately terminate into the Santa Ana River. Runoff is generally transported downstream (east to west) via surface flow along a network of streets. Steep slopes and high curbs allow the flows to be contained within the streets for the most part. Runoff from Van Buren, De Berry, and Barton watershed discharge into the Highgrove Channel. The Pico watershed currently discharges into the Riverside Canal, which routes the flow south. Coordination between the City of Grand Terrace and Riverside has resulted in a request to rerout flows from the Pico watershed back into Highgrove Channel as part of the new Gateway project.
In 2020, Q3 Consulting prepared a detailed regional drainage study focused on sizing a drainage system for the Pico and Van Buren Watersheds, “Pico Watershed Focused Drainage Study”, January 2020 (Pico Study). This study identified the main storm drain system required to capture flows tributary to Pico Street and Van Buren Street. Both systems would discharge into one of two proposed retention basins constructed as part of the Gateway project, per the Pico Study.
The Gateway project has since consolidated the two basins into one large detention/retention basin. This study discusses the latest project proposed improvements for a single basin alternative, discharging into the Highgrove Channel. The Gateway project design is designed to ensure peak outflow for the single basin, combined with flows from Van Buren, De Berry, and Barton storm drains is less than what is currently tabled to go to the Highgrove Channel.
County Requirements for the Gateway Regional Basin Design:
A majority of the Highgrove Channel is a County owned facility. The proposed detention basin discharges to a portion of the Highgrove Channel that is not owned or operated by the County.
Regardless, the proposed Gateway basin was evaluated and sized using traditional models, per the San Bernardino County Flood Control District methodology. This was performed as part of the site-specific Gateway Project Design Report. This method of sizing the basin is very conservative, compared to methodologies used in the more advanced models, resulting in an oversized basin. For this SDMP, the more advanced stormwater model (XPSTORM) was used for analysis of the entire City-wide watershed, which show results of the proposed basin functioning at less than maximum capacity. This analysis was outlined in the (Q3, 2023) Gateway draft report.
All other proposed storm drain facilities (tributary to the basin) were evaluated and sized using XPSTORM. Even though the detention basin was sized based on traditional (conservative) models, it was also evaluated and included in the City-wide XPSTORM model to identify tail water controls for the adjoining proposed storm drains as part of the Gateway project.
2.1 Methodology
An advanced stormwater modeling method was prepared to evaluate existing capacity and proposed improvements for the local drainage infrastructure. This method was used to analyze and size the main lines proposed within the boundaries of the city. The analysis was a continuation and extension of the work previously performed in the (Q3, 2023) project hydrology and hydraulics report.
The methods used in this SDMP utilize aspects of the SBCFCD Hydrology methodology, such as hydrologic loss rate calculations and precipitation. XPSTORM was selected due to the complexities of the City watershed, which include steep terrain with evidence of bifurcations.
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As mentioned previously, a second methodology was used to develop the regional basin discharges into the County owned facility (Highgrove Channel). This method consisted of the use of AES Software to calculate and size the proposed regional detention basin. Runoff from the tributary watersheds were also calculated using the AES Software for the purposed of sizing the detention basins. This method was only used for the basin sizing and was not used to evaluate the city storm drain facilities.
2.1.1 Direct Rainfall Method (XPSTORM Hydrology)
The XPSTORM model was used to support the sizing and future design of the City storm drain main-line systems. XPSTORM is a dynamic-wave model that solves the full St. Venant Equations. XPSTORM can model the surface in 2-dimensions, while linking to the subsurface infrastructure, or storm drain system.
The result is a comprehensive model that can communicate between the surface and subsurface facilities throughout the modeled design storm duration.
XPSTORM is not currently on the County’s accepted model list, therefore it was only used for the City drainage system sizing. Although the County is updating their Hydrology Manual and are contemplating the use of advanced models.
Due to the topographic and climatic characteristics of this region, this project study benefited from the use of an advanced surface model which identifies flow quantity and direction as it moves through the urban area. Traditional hydraulic modeling techniques cannot accurately predict the existing flooding potential or the impacts of proposed improvements for these areas. Using these advanced modeling techniques, hydraulic analyses were completed for existing and ultimate conditions using a linked 2-dimensional surface model, and 1-dimensional subsurface model (1D/2D) in XPSTORM.
Areas within the urbanized study area were evaluated in XPSTORM using a rain-on-grid approach, or Direct Rainfall Method (DRM). DRM is the process of adding (net) rainfall directly to the twodimensional surface, or digital terrain model. This method allows the surface’s physical characteristics (i.e. topography, land use) to dictate the flow patterns, resulting in a more realistic rainfall-runoff modeling approach.
Offsite areas, mainly hillside slopes, were evaluated externally using the Advanced Engineering Software’s (AES) program to develop Unit Hydrographs for the design storm events. The offsite hydrographs were added to the DRM at the locations where the offsite hydrographs entered the urbanized area. This was implemented to reduce the runtime of the 1D/2D models.
For a given watershed, DRM will yield different peak flow values than the traditional hydrology methods, such as the Unit Hydrograph. This is a result of the response of the runoff on the 2D surface.
Theoretically, the peak flows produced by the Unit Hydrograph are calculated based on “lag”, which is similar to time-of-concentration, that assumes all flows are concentrated and conveyed from one concentration point to the next. This assumption has a tendency to fictitiously reduce travel time.
Reduced time-of-concentration yields higher peak flow rate estimates. DRM models will allow the topography to dictate the runoff paths and velocities and do not require manual calculations.
Loss rates for the DRM were calculated based on the San Bernardino County Hydrology Manual. Loss rates in XPSTORM were incorporated into the gross rainfall data, to yield a net rainfall to use on the 3D surface. Loss rates were calculated and incorporated into the rainfall point precipitation depths based on Land Uses, Soil Type, and using Antecedent Moisture Condition 3 (AMC 3) for the 100-year storm.
2.1.2 Proposed Regional Basin Evaluations
The proposed basin is a part of the Phase 1 improvements, and detailed design results can be found in the Gateway project design report.
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As seen on Exhibit 1 and Exhibit 2 from the (Q3, 2023) report, included herein, three regional subwatersheds were delineated based on drainage patterns and outlet points (general topography). The northern drainage boundary (Subarea 1A) and middle drainage boundary (Subarea 2A) eventually discharge into the existing double 6’x6’RCB underneath the I-215 freeway. The southern drainage boundary (Subarea 3B) eventually discharges into the Riverside Canal in existing conditions. Guidelines for establishing the longest flow path, Lca, and effective slope were performed per the County Hydrology Manual.
In the (Q3, 2023) report, a series of regional hydrology analyses were prepared in accordance with the San Bernardino County Hydrology Manual for the 2, 5, 10, 25, and 100-year storm events to evaluate the potential project impacts on the County-owned Highgrove Channel. See (Q3, 2023) report. For existing, project and ultimate conditions, loss rates and unit hydrographs were developed using AES. For the project and ultimate conditions, the hydrographs were routed using EPA’s SWMM5. SWMM5 (an advanced model) was used to route the basin since the basin outlet is a consortium of several pipes discharging flows to two different water bodies.
EPA’s SWMM 5 software program is a dynamic wave model, used in this analysis to evaluate the proposed basin’s outlet structures. This model has been used in San Bernardino County, and multiple agencies within the County, over the last several years. In this project, it is only used to route the basin, due to the complexity of the outlet facilities.
The purpose of this analysis was to identify the maximum size of the basin and outlet configuration. For this SDMP, the basin was added to the XPSTORM model to establish the 100-year maximum water surface elevation. Since the XPSTORM model is a single comprehensive model, which includes all storm drain features, a more accurate depiction of how the basin water surface elevation impacts the connected storm drains allowed for more precise sizing.
2.2 Hydrologic Boundary Conditions
The regional hydrology for the design of storm drain systems is based on the County of San Bernardino requirements prescribed in the Hydrology Manual. The evaluation and preliminary design of drainage infrastructure was based on the 1-percent annual chance (100-year) storm event based on the methodology identified in herein.
Points of Comparison (POC):
For the Gateway Basis of Design analysis, two discharge points were selected to serve as point of comparisons (POC) of the peak discharges between existing and ultimate conditions to ensure the project conditions did not produce adverse impacts to the downstream receiving water bodies. POC #1 is located at the inlet of the existing double 6’Hx6’W RCBs located under the I-215 freeway and railroad crossing.
For existing conditions, another location was evaluated to identify how much existing condition runoff was discharging from the Pico watershed into the Riverside Canal (POC #2). Coordination with the City of Riverside resulted in conditions to divert 100-percent of the runoff (Pico) to Highgrove Channel (POC #1). Consequently, for any future plans for drainage within the City of Grand Terrace, runoff to POC #2 would be zero.
Boundary Conditions (XPSTORM):
In XPSTORM existing and ultimate condition models, the open channels downstream of POC #1 was set to normal depth.
Existing 48” Culvert in Highgrove Channel
The existing 48” culvert located in the Highgrove Channel does not have the capacity to convey 100-year design storm flows. In the event of a 100-year storm event, flows would bypass the existing 48” culvert and overtop the embankment continuing towards POC #1. Therefore, for this analysis the existing 48” culvert was disregarded.
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2.3 Hydrologic Models
Hydrology was prepared for two conditions: Existing Conditions and Ultimate Conditions. The extents of the XPSTORM model can be seen in Figure 2-1.
Existing Condition analyses were prepared with no proposed improvements. This run established the target flowrate at Point of Comparison #1 (POC #1) for ultimate conditions. It also identified how much flow was currently being discharged to the Riverside Canal or POC #2 (See Figure 2-2). POC #2 was identified only for reference, since the City of Riverside has required that all flows from the Pico watershed be rerouted to POC #1.
The existing conditions model extended beyond the entire City boundary. Modeled results for this condition were developed to provide a baseline for areas needing flood control mitigation.
Ultimate Condition analyses were prepared assuming all the proposed improvements from the Gateway project (Phase 1) are constructed in addition to the extended proposed improvements (Phase 2). Ultimate condition peak flows from the proposed detention basin and drainage facilities were compared to the existing condition flows at POC #1 to ensure ultimate peak flows were less than existing condition peak flows. Figure 2-1 shows the limits of the proposed Gateway project and the POC locations where peak 100-year flows were compared.
The Ultimate conditions models also include other proposed improvements outside the watersheds tributary to the Gateway project.
Figure 2-1. XPSTORM Model Extents
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Figure 2-2. Gateway Project Footprint and Points of Comparison (POC)
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2.4 Watershed and Flood Routing Parameters
2.4.1 Precipitation
For the Detailed Method XP models, direct rainfall method (DRM) data was prepared using the San Bernardino County Hydrology rainfall pattern to develop hyetographs. The point precipitation data for the 100-year storm event (or 1% annual chance) was based on the NOAA Atlas 14 data.
Table 2-1. NOAA Atlas 14, 100-Year Point Precipitation Data used in XP Models Duration 100-Year Point Precipitation
5-min 0.29
30-min 0.77
60-min 1.12
3-hr 1.89
6-hr 2.61
24-hr 4.65
2.4.2 Topography
Existing topography (2013) was provided by the City. This data was used to develop the 2-D surface within XPSTORM.
2.4.3 Vertical Datum
The project uses the North American Vertical Datum of 1988 (NAVD88).
2.4.4 Soil Types
Soil data from USDA Natural Resources Conservation Services Web Soil Survey was used for this analysis.
2.4.5 Land Uses
Land use data was taken from the General Plan Land Use obtained from the San Bernardino County ArcGIS website.
2.4.6 Manning’s “n” Value
A varying Manning’s value was used for the model. The Manning’s designations were as follows:
0.06 – Open Space
0.045– Residential/Commercial Landscaping
0.025 - Streets
Blocked– buildings/obstructions were not modeled with a Manning’s roughness.
For 2-D modeling (used in the Detailed Method), the surface roughness coefficients are higher than standard drainage conduit values. The primary reason is, flows are generally shallow on 2-D surfaces, therefore roughness is relatively more impactful on flows regimes.
2.4.7 Grid Size (Detailed Method)
The grid cell resolution is an important consideration in two-dimensional modeling. Small grid cell sizes increase accuracy but require additional computation times; while larger grid sizes compromise accuracy but increase computation time. The determination of grid size requires a trade-off to ensure a workable model without compromising satisfactory accuracy.
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Multiple cell sizes can be specified within one model, allowing a larger grid size to be used in areas where high detail is not required and a smaller grid size to be used in primary areas of interest. Multiple cells sizes were evaluated and a 10-foot grid cell size was used for the Grand Terrace model. This cell size was sufficient to adequate capture the street flow conveyance, and refined enough to provide a higher level of detail in areas where bifurcation could be present
2.4.8 Computational Time Step (Detailed Method)
The computational time step is very important for 2-D modeling. At each time increment, the software computes a flow depth at each cell as well as each cell boundary, and assigns flow accordingly, resulting in a new computation at the subsequent time step therefore increasing the simulation time. Grid size is directly proportion to the computational time step. A time-step of 0.8 seconds was used for 10-foot grid cells.
2.5 Modeling Analyses
As part of the ultimate conditions modeling, the proposed basin was sized based on the requirements of the SBCFCD Hydrology Manual per the Gateway H&H Study (Q3, 2023). The analysis included using County standard models AES and SWMM5, for basin outlet hydraulic (County Method). Detailed descriptions of this method can be found in the (Q3, 2023) report. Delineation maps for both existing and ultimate conditions (Phase 1) are shown in Exhibits 1 and 2. The analysis supported the grading plan and outlet size for the Gateway project regional detention basins. This basin (as sized in the previous study) was used in the SDMP final models.
For this SDMP, XPSTORM was used to evaluate all drainage infrastructure. The County facilities were included in the models to understand the total flows tributary to the POC’s downstream. This comparison was necessary to ensure no increase in runoff was occurring.
2.5.1 XPSTORM Existing Condition Model Results
The baseline existing condition model was developed and run for the 100-year event. The maximum water surface elevations for the event were plotted on an aerial of the focused study area. Several locations were identified where flows breakout (bifurcate) into adjacent sub-watersheds. Figure 2-3 shows the result of the Existing Conditions 100-Year storm model for the area tributary to the Phase 1 proposed detention basin and shows the locations of bifurcation. As can be seen, some areas along Pico Street reach over 2 feet in depth. Both Pico Street and Van Buren Streets contain areas of flooding and breakout. As a result, Michigan Street, particularly the area between Pico and Van Buren also experiences flooding.
Some areas were considered for “Hazard”, which is the product of velocity * depth. Areas with the Hazard product of “6.0” and greater were marked for potential surface water capture. The focus areas exist along Pico, west of Michigan Street. Van Buren also experiences high “hazard” levels north of Michigan Street. Much further up in the watershed, both Pico and Raven Way also show high “hazard” levels, but the only way to alleviate this would be to reduce flows tributary, via attenuation, or extend a storm drain up Pico Street to intercept flows. This later method may prove to be infeasible.
Breakout Locations
The primary benefit in evaluating the watershed drainage conditions is XPSTORM’s ability to evaluate and quantify areas of bifurcation and/or breakout. The images below show the main locations where this occurs. Locations where the XPSTORM model predicted breakouts were field verified by the team.
Each site contained evidence of flood issues. The breakout #1 image shows a location along Pico Street at Michigan Avenue. The street curb along this field is slightly lower than the upstream curb height, and the longitudinal slope is slightly less as well. As storm runoff reach the flatter section of street, the velocity drops and the depth increases. The result is a breakout, where flows migrate northwest through the lot towards Michigan Avenue. The sandbags seen in this photo are evidence of an attempt to mitigate the breakout.
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The second breakout point (#2) shows the breakout
identified along Pico Street just west of Mt. Vernon
Avenue. Here it is apparent that the curb height is 6
inches, whereas on the other side of Pico Street, the curb is 12-inches. Just downstream of this location, the
property owners installed a railroad tie along the top of curb to help thwart potential flooding.
Breakout #3 occurs along Van Buren Street, just east of Vivienda Avenue. This location is less obvious but can
be seen as the upstream curb face is over 12-inches. A
driveway is at or just a few inches above street flowline causes flows to route into this property owner’s yard.
The curb face just downstream of the driveway is also 6 inches.
The model analysis showed that standard delineations
of the Pico Street, Van Buren Street, and De Berry
Street watersheds are not standard, and do not follow
the previously identified watershed delineations.
Previous delineations suggested very clean, straight
boundaries. Although this may be true for small storm
events, larger storm events such as the 100-year event
bifurcate and cross over to adjacent drainage
watersheds.
One result of this analysis was a better understanding of where and how to phase each proposed drainage
improvement and their respective impacts on adjacent
watersheds.
XPSTORM results were calculated at the two POC’s for
comparison to ultimate conditions. Table 2-2 shows the
peak 100-year runoff at POC #1 (Caltrans double 6’x6’)
RCB, and POC #2 (Riverside Canal).
Table 2-2. Existing Conditions 100-Year POC Peak Flowrates (XPSTORM) Location Peak Flow (cfs)
POC #1 / Node 101 933
POC #2 / Node 200 320
In reviewing the current conditions at the Caltrans double 6’H x 6’W RCB (POC #1), the existing 100- year peak flow tributary to this facility was calculated to be 933 cfs. One goal of this SDMP is to ensure that with the proposed Phase 2 improvements, the flowrates from XPSTORM ultimate conditions are less than this value. POC #2 does not exist in ultimate conditions. Consequently, the flow at that location is zero, as they are being diverted to the basin.
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ExistingCondition100-YearMaxDepth
GrandTerraceStormDrainMasterPlan
EXHIBIT
B.1-1
POC #2
Ex 5'hx8'w RCB Q100=320 cfs
POC #1
Ex Dbl 6'x6' RCB Q100=933 cfs
Figure 2-3 Page 201 of 847
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2.5.2 XPSTORM Ultimate (Proposed) Condition Models
The ultimate condition models consisted of the proposed Gateway improvements (Phase 1) and the new proposed improvements as part of the SDMP (Phase 2). The improvements in Phase 2 are extensions of the Phase 1 improvements.
The ultimate condition models are highly dependent upon the Phase 1 proposed regional detention basin, as discussed in the Gateway H&H Study (Q3, 2023). Figure 2-4 shows the Ultimate Conditions traditional County method watershed delineations for the proposed detention basin. As stated previously, this hydrology was prepared only163 to size the detention basin, not to quantify flows for the storm drain infrastructure. That being said, the sizes shown for Phase 1 on Figure 2-4 may change during the Phase 1 Final Design for the Gateway project.
The regional detention basin sized in previous studies was included in the XPSTORM model evaluation.
The goal of the basin was to not only reduce the peak runoff of the Gateway project site but also reduce the peak runoff of the regional watershed. The proposed basin is approximately 65 ac-ft and has a bottom elevation of 925 feet and a top elevation of 945 feet, with a primary outlet structure consisting of a 3’high by 5’ wide RCB. Table 2-3 shows the stage-storage relationship. The basin will discharge into the existing double 6’hx6’w RCB underneath the I-215 freeway (POC #1/ Node 101).
Table 2-3. Proposed Basin Storage-Area Curve
Figure 2-4 shows the Phase 1 and Phase 2 storm drain systems. The “blue” lines and proposed basin represent proposed drainage infrastructure associated with the Gateway project (Phase 1). The “red” lines Elevation Depth (ft) Area (sf) Total Vol (ac-ft)
920 0 72,173.9 0.00
921 1 75,871.4 1.70
922 2 79,625.4 3.48
923 3 83,435.7 5.36
924 4 87,302.2 7.32
925 5 91,225.0 9.36
926 6 95,204.1 11.50
927 7 99,239.4 13.74
928 8 103,331.0 16.06
929 9 107,478.8 18.48
930 10 111,684.9 21.00
931 11 115,943.1 23.61
932 12 120,259.7 26.32
933 13 124,632.5 29.13
934 14 129,061.6 32.04
935 15 133,547.0 35.06
936 16 138,088.6 38.18
937 17 142,686.5 41.40
938 18 147,340.7 44.73
939 19 152,051.1 48.17
940 20 156,817.9 51.71
941 21 161,640.9 55.37
942 22 166,520.3 59.13
943 23 171,455.9 63.01
944 24 176,448.0 67.01
945 25 181,496.4 71.11
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are identified as proposed infrastructure as part of this SDMP (Phase 2). “Orange” lines represent improved curb areas and associated with Phase 2 improvements All Phase 1 and Phase 2 proposed improvements were modeled as ultimate conditions. The results of this analysis and breakdown of proposed SDMP (Phase 2) improvements are identified in Section 4.
Table 2-4. Ultimate versus Existing Conditions 100-Year POC Peak Flowrates (XPSTORM) Location Existing Condition Peak
Flow (cfs)
Ultimate Condition Peak
Flow (cfs)
POC #1 / Node 101 933 820
POC #2 / Node 200 320 51*
*Note: Flow in canal from not associated with grand City runoff.
Table 2-2 shows the comparison of the two primary points of concentration assuming a free-flowing watershed. In other words, no blockage or accumulation of sediment that may impede flows within the system are assumed.
POC #2 Discussion:
The Caltrans double RCB is tabled to convey flows from the watershed with the assumption of a freeflowing watershed. All traditional hydrologic models, with tributary drainage areas larger than 640 acres (which is the case for POC #2) are recommended to use the Unit Hydrograph approach, as shown in the SBCFCD Hydrology manual. As such, a hydrologic analysis of tributary drainage for a single large area assumes free, unrestricted flow from the headworks to the concentration point (lag time calculation). This assumption can result in lag times slightly shorter than what actually exists, resulting in higher peak flow estimations. The Unit Hydrograph method was used to size the proposed basin, but XPSTORM was used to size the surrounding facilities. This includes identifying the flows tributary to POC #2.
Per the results of the Ultimate Conditions XPSTORM model, both the existing condition and ultimate condition peak 100-year flowrates are conveyed through the Caltrans double 6’W x 6’H RCB culverts without overtopping. The models, however, only are conveyed a short distance downstream of the existing culvert. A full model of the Highgrove Channel was not prepared as part of this analysis.
Traditional hydraulic models may show that this facility does not adequately convey 100-percent of either the existing or ultimate condition flows. Yet several conservative assumptions are associated with these traditional models, such as approach velocity limitations and/or over conservative loss rate projections.
Regardless of the modeling technique, it was the goal of the MP to reduce the ultimate 100-year watershed runoff peak flow to less than that of the free flowing existing condition peak runoff to reduce risk of future adverse impacts to the downstream system.
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maxdepth(ft)
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EXHIBIT
B.1-1
POC #2
Ex 5'hx8'w RCB Q100=51 cfs
POC #1
Ex Dbl 6'x6' RCB Q100=820 cfs
Prop Basin Design Bottom elev= 920' Top elev= 945'
100yr Max WSE= 937'
Freeboard = 8ft
Prop Basin Outlet to Ex Dbl 6x6 RCB
3'hx5'w RCB
Note: Proposed SD sizes shown for Phases 1 and 2 are based on what was used in the XP models. Design plan SD sizes may differ from XP SD sizes Prop 3'hx5'w RCB Q100= 380 cfs
Prop 60" SD Prop 48" SD Prop 78" SD Prop 54" SD
Prop 36" SD
Prop 42" SD Prop 48" SD Prop 60" SD
Figure 2-4
*NOTE: Phase 1 sizes shown in this figure were used in the MPD XP Model but may change during the Final
Design of the Phase 1 improvements prepared by
others. These changes will not impact the offsite
inflows in this model. Page 204 of 847
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3 ESTIMATED CONSTRUCTION COSTS
Preliminary construction cost estimates were developed for the Phase 2 improvements. Unit prices were based on recent bid project and associated unit pricing. A list of unit costs can be seen in Table 3-1. The current California Construction Cost Index for January 2026 is 10,159.
Table 3-1. Construction Cost Unit Pricing
Item Unit Quantity Unit Price
18" RCP LF 1 $178
24" RCP LF 1 $200
30" RCP LF 1 $215
36" RCP LF 1 $230
42" RCP LF 1 $252
48" RCP LF 1 $274
54" RCP LF 1 $297
60" RCP LF 1 $326
66" RCP LF 1 $348
84" RCP LF 1 $408
7' CB EA 1 $14,826
14' CB EA 1 $25,205
21' CB EA 1 $32,618
28' CB EA 1 $44,479
18" Curb and Gutter LF 1 $222
Sawcut and Remove Existing AC SF 1 $44
RipRap (Protection) CY 1 $120
Grouted Riprap (Protection) Cy 1 $160
Reinforced Concrete Structures CY 1 $1,200
Contingencies were developed based on similar City drainage master plan projects. The following contingencies were used in this project.
Table 3-2. Construction Cost Contingencies
Item Unit Quantity
Junctions/Manholes (10%) LS 1
Mobilization (10%) LS 1
Engineering & Design (15%) LS 1
Surveying (2%) LS 1
Environmental/Permitting (15%) LF 1
Construction Management (6%) LF 1
A total contingency was set at 58-percent for each proposed project. Individual costs are estimated in Sections 4.1, 4.2, and 4.3. These costs are preliminary engineer’s estimates. The estimates do not include utility relocations or roadway improvements.
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4 RECOMMENDED PROPOSED IMPROVEMENTS
The improvements recommended in this SDMP do not include the Gateway project Phase 1 improvements. This SDMP focuses on the “ultimate” proposed improvements of the Gateway project Phase 2 and the proposed improvements within the rest of the City.
As discussed previously, the ultimate proposed improvements focus on the known flooded areas within the City and the extension of Phase 1 Gateway improvements. The extension of the Phase 1 and Phase 2 improvements are primarily intended to capture and convey flows to the proposed regional detention basin. One major project constraint was to reduce the flows to POC #1 (Caltrans culvert) to below existing condition using the SBCFCD methodology (Unit Hydrograph) approach. The UH approach assumes single area drainage from the entire watershed tributary to this point.
The watershed used for existing versus ultimate at POC #1, slightly change as a result of the City of Riverside’s request to reroute flows from the Pico watershed back to the Highgrove Channel instead of the Riverside Canal. This creates a diversion of watersheds back to historical flow paths, but does change the current drainage characteristics for both the Highgrove Channel and Riverside Canal. The proposed detention basin is designed to reduce the ultimate flow (based on single area UH methodology at POC#1) to below existing conditions even with this diversion.
Another constraint included the existence of County owned storm drain facilities within the City. Three of the main storm drain facilities; De Berry, Highgrove, and Barton storm drain are County owned. Any changes to these facilities would require County review and design methodologies, which include much more conservative modeling procedures that would ultimately require larger storm drain conduit sizing.
This would result in improvement costs much greater than using the more advanced hydraulic software models. Consequently, proposed improvements for this SDMP focused on Pico Street, Van Buren, and a parallel system along De Berry Street.
As a part of the Gateway project, main line improvements have been proposed for each of the City-owned lines, including drainage infrastructure improvements within the future development site. This study focuses on the extension of these improvements and reviewing locations of known flooded areas outside of the sphere of the Gateway project improvements.
4.1 Pico Street Improvements
The Gateway (Phase 1) project proposes to construct storm drain from the proposed regional basin to the western end of Pico Street. This study proposes to extend additional storm drain along Pico Street from the western end to the Gage Canal easement (Phase 2). Figure 4-1 shows the proposed storm drain, which includes 42-inch to 54-inch RCP, fourteen inlets, and improvements to the existing curb and gutter.
Raising the curb and gutter from 6-inchs to 12- to 18-inchs will help maintain street flow and not allow for bifurcation.
The total estimated costs for Pico Street, Phase 2 proposed improvements are identified in Table 4-1.
Phase 1 improvements are currently ongoing and not a part of the SDMP cost estimates.
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Table 4-1. Phase 2 Pico Street Proposed Improvement Cost Estimates Pico Storm Drain
Item Unit Quantity Unit Price Unit Cost Subtotal
18" RCP LF 420 $178 $265 $111,340
42" RCP LF 1137 $252 $376 $427,001
48" RCP LF 103 $274 $409 $42,095
54" RCP LF 1257 $297 $442 $555,373
21' CB EA 10 $32,618 $48,601 $486,007
28' CB EA 6 $44,479 $66,274 $397,642
18" Curb and Gutter LF 2876 $222 $331 $953,016
R&R AC Paving (T-CAP) SF 1 $130,000 $130,000 $130,000
Traffic Control LS 1 $80,000 $80,000 $80,000
Subtotal $3,182,474
Contingencies
Junctions/Manholes (%) LS 1 10 $318,247
Mobilization (%) LS 1 10 $318,247
Engineering & Design (%) LS 1 15 $477,371
Surveying (%) LS 1 2 $63,649
Environmental/Permitting (%) LS 1 15 $477,371
Construction Management (%) LS 1 6 $190,948
Subtotal $1,845,835
SUBTOTAL COST $5,028,309
GENERAL CONTINGENCY (%) 58 $2,916,419
GRAND TOTAL $7,944,729
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4.2 Van Buren Street Improvements
The Gateway (Phase 1) project proposes to construct storm drain from the proposed regional basin to Michigan Avenue. This study proposes to extend this facility further east approximately 800 linear feet (Phase 2). The proposed storm drain consists of 36-inch RCP with four inlets. Figure 4-1 shows the proposed storm drain, and a section of raised curb along the south side of the street.
Table 4-2. Phase 2 Van Buren Proposed Improvement Cost Estimates Van Buren Storm Drain
Item Unit Quantity Unit Price Unit Cost Subtotal
18" RCP LF 304 120 $178 $54,086
24" RCP LF 183 135 $200 $36,628
36" RCP LF 942 155 $230 $216,479
48" RCP LF 966 185 $274 $264,961
21' CB EA 5 22000 $32,618 $163,090
18" Curb and Gutter LF 250 150 $222 $55,599
Sawcut and Remove Existing AC SF 250 30 $44 $11,120
R&R AC Paving (T-CAP) LS 1 80000 $80,000 $80,000
Traffic Control LS 1 50000 $50,000 $50,000
Subtotal $931,963
Contingencies
Junctions/Manholes (%) LS 1 10 $93,196
Mobilization (%) LS 1 10 $93,196
Engineering & Design (%) LS 1 15 $139,795
Surveying (%) LS 1 2 $18,639
Environmental/Permitting (%) LS 1 15 $139,795
Construction Management (%) LS 1 6 $55,918
Subtotal $540,539
SUBTOTAL COST $1,472,502
GENERAL CONTINGENCY (%) 58 $854,051
GRAND TOTAL $2,326,554
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4.3 Known Flooded Area Proposed Improvement Recommendations Improvements beyond the Gateway project Phase 2 focus on the areas of known flood hazards within the City. In particular, these areas include major flooding along main flow paths. At a master plan level, minor flooding, or areas of shallow ponding, are not considered major flow paths. These minor areas can be addressed individually using local solutions. Four locations were identified in this study for further evaluation and potential improvement.
Site 1: This site is located along Mount Vernon Avenue, north of Barton Road occurs at inlets along the main street, a part of the Barton Storm Drain system. This site consists of several major constraints including major utilities within the street. Evaluation of this site showed that the existing Barton Storm Drain (County owned) is undersized. Any additional flows to this system would require upsizing the entire drainage system. A local lot adjacent to the inlet along the west side of the street is not developed and could potentially be used as a small basin (above or below grade). This would only serve flows along the west side of the street and would most likely require a pump system to drain, in addition to purchasing the lot. A proposed solution for this site would be to prepare a detailed study to identify if detention and/or retention would be feasible to reduce flooding at this location. It is recommended to conduct a more detailed site evaluation for potential local improvements.
Figure 4-2. Site 1 – Known Flood Location (Mount Vernon Avenue north of Barton Rd.)
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Site 2: This site is located within the Gage Canal easement just north of Pico Street (Figure 4-3). Flows from the neighborhood east drain through this easement and onto Pico Street. After evaluation, the model showed that by adding an earthen berm (2+ feet) along the western side of the easement, and cleaning the existing channel reduced the ponding to approximately 1 foot. Since this site is maintained by other agencies, it is recommended that coordination with the agency would be more economically feasible than taking ownership of the easement. This site requires maintenance and no structural drainage improvements are recommended as part of this SDMP. The recommendation for this site is to coordinate with appropriate agencies and potentially grade an earthen berm to protect properties to the west.
Maintenance of the existing swale should be performed in a routine matter to allow flows to drain towards Pico Street.
Figure 4-3. Site 2 – Known Flood Location (Gage Canal/Pico Street) Site 3: Vivienda Avenue is located at the north westernmost end of the City and is known to flood during moderate to large storm events (Figure 4-4). Recent development at the end of the cul-de-sac has tried to remove some of the flooding hazard that occurs in this area. Due to the flat topography in the area and the lack of slope in the relatively recent constructed bioswale, flows still pond. It is recommended to not attempt to improve this area with new storm drainage facilities but rather improve the outlet located at the north end of the development. This outlet would require coordination with the Railroad company and the County due to the leveed conditions. Improvements to this area would require easements through privately owned land. Also, much of the required improvements would be outside city boundaries. It is recommended that additional coordination be conducted with all agencies and a more detailed study to identify a mult-agency solution.
Site 4: The Grand Terrace Road low crossing is located north of the Vivienda Avenue/Grand Terrace Road intersection (Figure 4-5). This facility is design to pass low flows via a 24-inch pipe, and overtop during large storm events. Small pipes (such as a 24-inch) are subject to clogging which can cause overtopping more frequently that designed. Hydraulic analyses showed that improving the size of the undercrossing to a 48-inch RCP will provide enough conveyance to greatly reduce potential for overtopping (assuming no debris plugs the entrance). This headwall can be equipped with a debris rack to minimize debris accumulation potential. Figure 4-6 shows the proposed improvements.
Final - Grand Terrace Storm Drain Master Plan
June 2026 26 Q3 Consulting
Figure 4-4. Site 3 – Known Flood Location (Vivienda Avenue) Figure 4-5. Site 4 – Known Flood Location (Grand Terrace Rd. Low Crossing)
Final - Grand Terrace Storm Drain Master Plan
June 2026 28 Q3 Consulting
5 CONCLUSIONS
The goal of this storm drain master plans is to identify feasible regional drainage solutions that provide the most benefit for the city. Several factors exist that create infeasible opportunities for extending local improvements for some areas that experience minor to moderate flooding during large storm events.
These factors include the presence of undersized County storm drain facilities, the location and alignment of the Gage Canal, and the lack of subsurface storm drain currently within the City.
The new development, being constructed just east of the I-215 freeway, has provided the City with the opportunity to construct improvements to the regional drainage infrastructure. Referred to in this report as Phase 1, the Gateway project was conditioned to develop regional drainage improvements for the Pico Street, Van Buren Street, and De Berry Street watersheds. These improvements also include the construction of a large regional detention basin to mitigate not just project runoff, but regional runoff from the City. This SDMP builds on the Phase 1 improvements (Phase 2) and includes other proposed improvements within the City. All proposed improvements, city-wide, including Phase 1 and Phase 2 are referred to as the Ultimate Condition.
The proposed regional detention basin (Phase 1) was design to mitigate flows and discharge to the existing Highgrove Channel just upstream from the Caltrans double 6’H x 6’W RCB (POC #1). The basin also was designed to mitigate the increase of expected flows due to the redirecting of runoff originally tributary to the Riverside Canal (POC #2). Table 5-1 shows the existing versus the ultimate condition flows at both points of comparison.
Table 5-1. Ultimate Conditions Regional Basin 100-Year Results (XPSTORM) Location Existing Peak Flow
(cfs)
Ultimate Peak Flow
(cfs)
Basin Maximum Water Surface Elevation N/A 937.0
POC #1 (Caltrans Double RCB) 933 820
POC #2 (Riverside Canal) 320 51*
*Note: Flow within Canal (not storm runoff)
The ultimate SDMP proposed facilities (other than Phase 1) were divided into three systems: the Phase 2 Pico Street storm drain, the Phase 2 Van Buren Storm drain, and the Grand Terrace Road crossing. Table 5-2 shows the summary of the estimated construction costs for each.
Table 5-2. Ultimate SDMP Proposed Improvement Construction Cost Summary System Name Estimated Cost
Pico Storm Drain Improvements (Phase 2) $2,327,000
Van Buren Storm Drain Improvements (Phase 2) $7,945,000 Grand Terrace Road Crossing $714,000
Subtotal $10,986,000
This cost is the recommended amount to complete the improvements necessary to construct the recommendations for this SDMP. These costs do not include the Phase 1 projects currently being implemented as part of the Gateway project. Although some additional locations experiencing localized flooding are not recommended for regional improvement as part of this SMPD, these areas can be evaluated as stand-alone projects that require more detailed evaluations including utility location
Final - Grand Terrace Storm Drain Master Plan
June 2026 29 Q3 Consulting
verification, potential property investment, and coordination with outside agencies. The focus of this SDMP is on regional drainage solutions.
5.1 Priority and Construction Phasing
This SDMP was prepared with the assumption that all Phase 1 improvements will be completed prior to Phase 2. All Phase 1 improvements that convey regional flows were sized based on a worse-case scenario comparing “interim” and “ultimate” upstream improvements. Interim conditions refer to constructing Phase 1 today, without Phase 2 projects implemented. Ultimate conditions refer to all systems constructed. If flows in a particular system of Phase 1 are larger for ultimate conditions, that was the flow used to design that particular system (As in the Pico Storm Drain system). Consequently, if the interim condition analyses produced higher peak flow rates, as in the Van Buren storm drain system, that was the flow used for design.
The rating of deficient systems was based on an existing hydraulic analysis and showed that the Pico Storm drain system is the highest priority (i.e. most deficient). Consequently, Ultimate Conditions (Phase 1 and 2), this system potentially impacts the overall City-wide flooding more than any other system. This is due to bifurcation of flows along Pico Street that migrate north-west and comingle with the Van Buren watershed runoff. Mitigating the Pico Street system will also benefit the Van Buren storm drain system.
Previous study analyses also showed the Van Buren storm drain system deficiencies produced the second most extents of flooding within the City. Even though mitigation measure to the Pico system (Phase 1 and 2) would reduce tributary peak flow, this system is still deficient. Consequently, it is recommended that this system be improved second.
The Grand Terrace Avenue road crossing produces flooding within the roadway itself, without much impact to adjacent properties. The proposed improvements at this location do not depend on other improvements for ultimate functionality. It is recommended that a more detailed study be performed during the design process of this facility to ensure no adverse impacts propagate downstream when improved, even though results from this Master Plan level study showed low flood risk potential.
Recommended order of construction depends on the priority of the ranking and the potential to implement as part of an existing project. Currently the Gateway project is conditioned to build Phase 1 improvements for both the Pico and Van Buren storm drain systems. Constructing the extensions of both these facilities (Phase 2) would produce the most benefit for the cost.
Table 5-3. Prioritized Phasing of Proposed Improvements System Name Order Of
Construction
Priority Ranking
Pico Storm Drain Improvements (Phase 1) 1 Highest
Van Buren Storm Drain Improvements (Phase 1) 2 Very High Pico Storm Drain Improvements (Phase 2) 3 High
Van Buren Storm Drain Improvements (Phase 2) 4 High
Grand Terrace Road Crossing 5 Moderate
Order of construction for the first four (4) projects is crucial to proper flood control operation without adversely impacting downstream facilities. The Phase 1 projects are in the process of final design and are assumed to be constructed soon. Order of construction of projects after this are presented in Table 5-3.
Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Exhibits
Excerpts From "Gateway at Grand Terrace
Specific Plan Hydrology and Hydraulics Report",
Q3 Consulting, 2023
Exhibit 1 - Profile Pico Street Storm Drain Improvements Phase 2 Exhibit 2 - Profile Van Buren Storm Drain Improvements Phase 2 Exhibit 3 - Existing Conditions SBCFCD Method Hydrology Map (Q3, 2023) Report
Exhibit 4 - Ultimate Conditions SBCFCD Method Hydrology Map (Q3, 2023) Report
Exhibit 1 - Existing Conditions SBCFCD Method Hydrology Map (Q3, 2023) Report Exhibit 2 - Ultimate Conditions SBCFCD Method Hydrology Map (Q3, 2023) Report
WREN ST
DEBERRY ST
BARTON RD
VAN BUREN ST
PICO ST
MAIN ST MT VERNON AVE MICHIGAN ST
OBSERVATION DR
LEGEND
HYDROLOGY SUMMARY TABLE HYDROLOGY SUMMARY TABLE
Consulting
27042 Towne Centre Drive, Suite 110 Foothill Ranch, CA 92610 949.259.6770 EXHIBIT
3 COUNTY METHOD
REGIONAL WATERSHED
EXISTING CONDITION
GATEWAY AT GRAND TERRACE N
1 Gateway at Grand Terrace Specific Plan Hydrology and Hydraulics Report, Q3,2023
WREN ST
DEBERRY ST
BARTON RD
VAN BUREN ST
PICO ST
MAIN ST MT VERNON AVE MICHIGAN ST
OBSERVATION DR
Consulting
27042 Towne Centre Drive, Suite 110 Foothill Ranch, CA 92610 949.259.6770 EXHIBIT COUNTY METHOD
REGIONAL WATERSHED
PROPOSED CONDITION
GATEWAY AT GRAND TERRACE
LEGEND
HYDROLOGY SUMMARY TABLE
3'HX5'W RCB
BASIN TOP ELEV = 945FT
100-YR MAX WSE= 941FT
N 4
2 Gateway at Grand Terrace Specific Plan Hydrology and Hydraulics Report, Q3,2023
Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Appendix A
Hydrology
Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Appendix A.1
Land Use Map
±
N:\40.163.000\GIS\MXD\Figures for Report_8.5X11.mxd
LEGEND
City Limits
Gateway Development
Land Use
LAND USE MAP - PROPOSED CONDITION
Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Appendix A.2
Soils Map
L
egend
CityLimits
SoilA
SoilD
±
N:\40.163.000\GIS\MXD\Figures for Report_8.5X11.mxd
SOILMAP
Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Appendix A.3
Offsite Hydrology – AES Single Area UH Results
Palm
Main
Pico
Wren
Barton
Bostick
Van Buren
Legend
City Limits
Watershed Boundary
Flowline
!( XP Node UH Inflow Location
± N:\40.163.000\GIS\MXD\Figures for Report_8.5X11.mxd
UNIT HYDROGRAPH WATERSHEDS AND NODE LOCATIONS
0 2,000 4,000
Feet
*Areas calculated using AES (Hydrographs) and Imported into XPSTROM Models. Page 225 of 847 Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Appendix A.3
Offsite Hydrology – AES Single Area UH Results
___________________________________________________________________________ ****************************************************************************
F L O O D R O U T I N G A N A L Y S I S
USING COUNTY HYDROLOGY MANUAL OF SAN BERNARDINO(1986)
(c) Copyright 1989-2015 Advanced Engineering Software (aes) Ver. 22.0 Release Date: 07/01/2015 License ID 1673
Analysis prepared by:
************************** DESCRIPTION OF STUDY ************************** * MAIN 100 YEAR *
* ZSNYDER 3/20/2019 *
* *
************************************************************************** FILE NAME: MAIN.DAT
TIME/DATE OF STUDY: 14:47 03/20/2019
**************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>SUBAREA RUNOFF (UNIT-HYDROGRAPH ANALYSIS)<<<<<
============================================================================ (UNIT-HYDROGRAPH ADDED TO STREAM #1)
WATERCOURSE LENGTH = 2692.000 FEET
LENGTH FROM CONCENTRATION POINT TO CENTROID = 1026.000 FEET ELEVATION VARIATION ALONG WATERCOURSE = 1217.000 FEET
BASIN FACTOR = 0.050
WATERSHED AREA = 76.300 ACRES
BASEFLOW = 0.000 CFS/SQUARE-MILE
WATERCOURSE "LAG" TIME = 0.114 HOURS
CAUTION: LAG TIME IS LESS THAN 0.50 HOURS.
THE 5-MINUTE PERIOD UH MODEL (USED IN THIS COMPUTER PROGRAM) MAY BE TOO LARGE FOR PEAK FLOW ESTIMATES.
FOOTHILL S-GRAPH SELECTED
MAXIMUM WATERSHED LOSS RATE(INCH/HOUR) = 0.010
LOW LOSS FRACTION = 0.010
*HYDROGRAPH MODEL #1 SPECIFIED*
SPECIFIED PEAK 5-MINUTES RAINFALL(INCH)= 0.29
SPECIFIED PEAK 30-MINUTES RAINFALL(INCH)= 0.76
OFFSITE Main Watershed UH Calculations Page 227 of 847
SPECIFIED PEAK 1-HOUR RAINFALL(INCH) = 1.12
SPECIFIED PEAK 3-HOUR RAINFALL(INCH) = 1.89
SPECIFIED PEAK 6-HOUR RAINFALL(INCH) = 2.61
SPECIFIED PEAK 24-HOUR RAINFALL(INCH) = 4.65
PRECIPITATION DEPTH-AREA REDUCTION FACTORS:
5-MINUTE FACTOR = 0.997
30-MINUTE FACTOR = 0.997
1-HOUR FACTOR = 0.997
3-HOUR FACTOR = 0.999
6-HOUR FACTOR = 1.000
24-HOUR FACTOR = 1.000
UNIT HYDROGRAPH TIME UNIT = 5.000 MINUTES
UNIT INTERVAL PERCENTAGE OF LAG-TIME = 73.277
============================================================================
UNIT HYDROGRAPH DETERMINATION
---------------------------------------------------------------------------- INTERVAL "S" GRAPH UNIT HYDROGRAPH
NUMBER MEAN VALUES ORDINATES(CFS)
---------------------------------------------------------------------------- 1 7.740 71.422
2 51.456 403.393
3 78.802 252.330
4 89.300 96.876
5 94.919 51.850
6 97.612 24.850
7 98.343 6.743
8 98.722 3.496
9 99.101 3.498
10 99.480 3.496
11 99.859 3.496
12 100.000 1.303
****************************************************************************
UNIT UNIT UNIT EFFECTIVE
PERIOD RAINFALL SOIL-LOSS RAINFALL
(NUMBER) (INCHES) (INCHES) (INCHES)
---------------------------------------------------------------------------- 1 0.0067 0.0001 0.0067
2 0.0067 0.0001 0.0067
3 0.0068 0.0001 0.0067
4 0.0068 0.0001 0.0067
5 0.0068 0.0001 0.0067
6 0.0068 0.0001 0.0068
7 0.0069 0.0001 0.0068
8 0.0069 0.0001 0.0068
9 0.0069 0.0001 0.0068
10 0.0069 0.0001 0.0068
11 0.0069 0.0001 0.0069
12 0.0070 0.0001 0.0069
13 0.0070 0.0001 0.0069
14 0.0070 0.0001 0.0069
15 0.0070 0.0001 0.0070
16 0.0071 0.0001 0.0070
17 0.0071 0.0001 0.0070
18 0.0071 0.0001 0.0070
19 0.0071 0.0001 0.0071
20 0.0071 0.0001 0.0071
21 0.0072 0.0001 0.0071
22 0.0072 0.0001 0.0071
23 0.0072 0.0001 0.0072
24 0.0072 0.0001 0.0072
25 0.0073 0.0001 0.0072
26 0.0073 0.0001 0.0072
27 0.0073 0.0001 0.0073
28 0.0073 0.0001 0.0073
29 0.0074 0.0001 0.0073
30 0.0074 0.0001 0.0073
31 0.0074 0.0001 0.0074
32 0.0075 0.0001 0.0074
33 0.0075 0.0001 0.0074
34 0.0075 0.0001 0.0074
35 0.0075 0.0001 0.0075
36 0.0076 0.0001 0.0075
37 0.0076 0.0001 0.0075
38 0.0076 0.0001 0.0075
39 0.0077 0.0001 0.0076
40 0.0077 0.0001 0.0076
41 0.0077 0.0001 0.0076
42 0.0077 0.0001 0.0077
43 0.0078 0.0001 0.0077
44 0.0078 0.0001 0.0077
45 0.0078 0.0001 0.0078
46 0.0079 0.0001 0.0078
47 0.0079 0.0001 0.0078
48 0.0079 0.0001 0.0078
49 0.0080 0.0001 0.0079
50 0.0080 0.0001 0.0079
51 0.0080 0.0001 0.0080
52 0.0081 0.0001 0.0080
53 0.0081 0.0001 0.0080
54 0.0081 0.0001 0.0080
55 0.0082 0.0001 0.0081
56 0.0082 0.0001 0.0081
57 0.0082 0.0001 0.0082
58 0.0083 0.0001 0.0082
59 0.0083 0.0001 0.0082
60 0.0083 0.0001 0.0082
61 0.0084 0.0001 0.0083
62 0.0084 0.0001 0.0083
63 0.0085 0.0001 0.0084
64 0.0085 0.0001 0.0084
65 0.0085 0.0001 0.0084
66 0.0086 0.0001 0.0085
67 0.0086 0.0001 0.0085
68 0.0086 0.0001 0.0086
69 0.0087 0.0001 0.0086
70 0.0087 0.0001 0.0086
71 0.0088 0.0001 0.0087
72 0.0088 0.0001 0.0087
73 0.0089 0.0001 0.0088
74 0.0089 0.0001 0.0088
75 0.0089 0.0001 0.0089
76 0.0090 0.0001 0.0089
77 0.0090 0.0001 0.0089
78 0.0091 0.0001 0.0090
79 0.0091 0.0001 0.0090
80 0.0092 0.0001 0.0091
81 0.0092 0.0001 0.0091
82 0.0093 0.0001 0.0092
83 0.0093 0.0001 0.0092
84 0.0094 0.0001 0.0093
85 0.0094 0.0001 0.0093
86 0.0095 0.0001 0.0094
87 0.0095 0.0001 0.0094
88 0.0096 0.0001 0.0095
89 0.0096 0.0001 0.0095
90 0.0097 0.0001 0.0096
91 0.0097 0.0001 0.0096
92 0.0098 0.0001 0.0097
93 0.0099 0.0001 0.0098
94 0.0099 0.0001 0.0098
95 0.0100 0.0001 0.0099
96 0.0100 0.0001 0.0099
97 0.0101 0.0001 0.0100
98 0.0101 0.0001 0.0100
99 0.0102 0.0001 0.0101
100 0.0103 0.0001 0.0102
101 0.0104 0.0001 0.0103
102 0.0104 0.0001 0.0103
103 0.0105 0.0001 0.0104
104 0.0105 0.0001 0.0104
105 0.0106 0.0001 0.0105
106 0.0107 0.0001 0.0106
107 0.0108 0.0001 0.0107
108 0.0108 0.0001 0.0107
109 0.0109 0.0001 0.0108
110 0.0110 0.0001 0.0109
111 0.0111 0.0001 0.0110
112 0.0111 0.0001 0.0110
113 0.0112 0.0001 0.0111
114 0.0113 0.0001 0.0112
115 0.0114 0.0001 0.0113
116 0.0115 0.0001 0.0113
117 0.0116 0.0001 0.0115
118 0.0116 0.0001 0.0115
119 0.0118 0.0001 0.0116
120 0.0118 0.0001 0.0117
121 0.0120 0.0001 0.0118
122 0.0120 0.0001 0.0119
123 0.0122 0.0001 0.0120
124 0.0122 0.0001 0.0121
125 0.0124 0.0001 0.0122
126 0.0124 0.0001 0.0123
127 0.0126 0.0001 0.0125
128 0.0127 0.0001 0.0125
129 0.0128 0.0001 0.0127
130 0.0129 0.0001 0.0128
131 0.0130 0.0001 0.0129
132 0.0131 0.0001 0.0130
133 0.0133 0.0001 0.0132
134 0.0134 0.0001 0.0133
135 0.0136 0.0001 0.0134
136 0.0137 0.0001 0.0135
137 0.0138 0.0001 0.0137
138 0.0139 0.0001 0.0138
139 0.0141 0.0001 0.0140
140 0.0143 0.0001 0.0141
141 0.0145 0.0001 0.0143
142 0.0146 0.0001 0.0144
143 0.0148 0.0001 0.0147
144 0.0149 0.0001 0.0148
145 0.0170 0.0002 0.0168
146 0.0171 0.0002 0.0169
147 0.0173 0.0002 0.0172
148 0.0175 0.0002 0.0173
149 0.0178 0.0002 0.0176
150 0.0179 0.0002 0.0177
151 0.0182 0.0002 0.0180
152 0.0184 0.0002 0.0182
153 0.0187 0.0002 0.0185
154 0.0189 0.0002 0.0187
155 0.0192 0.0002 0.0190
156 0.0194 0.0002 0.0192
157 0.0198 0.0002 0.0196
158 0.0200 0.0002 0.0198
159 0.0204 0.0002 0.0202
160 0.0206 0.0002 0.0204
161 0.0211 0.0002 0.0209
162 0.0213 0.0002 0.0211
163 0.0218 0.0002 0.0216
164 0.0221 0.0002 0.0219
165 0.0227 0.0002 0.0224
166 0.0230 0.0002 0.0227
167 0.0236 0.0002 0.0234
168 0.0239 0.0002 0.0237
169 0.0253 0.0003 0.0251
170 0.0257 0.0003 0.0254
171 0.0265 0.0003 0.0262
172 0.0269 0.0003 0.0267
173 0.0279 0.0003 0.0276
174 0.0284 0.0003 0.0281
175 0.0295 0.0003 0.0292
176 0.0301 0.0003 0.0298
177 0.0314 0.0003 0.0311
178 0.0321 0.0003 0.0318
179 0.0337 0.0003 0.0334
180 0.0346 0.0003 0.0342
181 0.0366 0.0004 0.0362
182 0.0377 0.0004 0.0374
183 0.0404 0.0004 0.0400
184 0.0419 0.0004 0.0415
185 0.0521 0.0005 0.0516
186 0.0544 0.0005 0.0538
187 0.0597 0.0006 0.0591
188 0.0633 0.0006 0.0627
189 0.0714 0.0007 0.0707
190 0.0784 0.0008 0.0776
191 0.1030 0.0008 0.1022
192 0.1316 0.0008 0.1308
193 0.2900 0.0008 0.2892
194 0.0880 0.0008 0.0872
195 0.0674 0.0007 0.0668
196 0.0568 0.0006 0.0563
197 0.0436 0.0004 0.0432
198 0.0390 0.0004 0.0386
199 0.0356 0.0004 0.0352
200 0.0329 0.0003 0.0325
201 0.0307 0.0003 0.0304
202 0.0289 0.0003 0.0286
203 0.0274 0.0003 0.0271
204 0.0261 0.0003 0.0258
205 0.0243 0.0002 0.0240
206 0.0233 0.0002 0.0230
207 0.0224 0.0002 0.0222
208 0.0216 0.0002 0.0214
209 0.0209 0.0002 0.0206
210 0.0202 0.0002 0.0200
211 0.0196 0.0002 0.0194
212 0.0190 0.0002 0.0189
213 0.0185 0.0002 0.0183
214 0.0181 0.0002 0.0179
215 0.0176 0.0002 0.0174
216 0.0172 0.0002 0.0170
217 0.0150 0.0002 0.0149
218 0.0147 0.0001 0.0145
219 0.0144 0.0001 0.0142
220 0.0140 0.0001 0.0139
221 0.0138 0.0001 0.0136
222 0.0135 0.0001 0.0133
223 0.0132 0.0001 0.0131
224 0.0130 0.0001 0.0128
225 0.0127 0.0001 0.0126
226 0.0125 0.0001 0.0124
227 0.0123 0.0001 0.0122
228 0.0121 0.0001 0.0120
229 0.0119 0.0001 0.0118
230 0.0117 0.0001 0.0116
231 0.0115 0.0001 0.0114
232 0.0113 0.0001 0.0112
233 0.0112 0.0001 0.0111
234 0.0110 0.0001 0.0109
235 0.0109 0.0001 0.0108
236 0.0107 0.0001 0.0106
237 0.0106 0.0001 0.0105
238 0.0104 0.0001 0.0103
239 0.0103 0.0001 0.0102
240 0.0102 0.0001 0.0101
241 0.0101 0.0001 0.0100
242 0.0099 0.0001 0.0098
243 0.0098 0.0001 0.0097
244 0.0097 0.0001 0.0096
245 0.0096 0.0001 0.0095
246 0.0095 0.0001 0.0094
247 0.0094 0.0001 0.0093
248 0.0093 0.0001 0.0092
249 0.0092 0.0001 0.0091
250 0.0091 0.0001 0.0090
251 0.0090 0.0001 0.0089
252 0.0089 0.0001 0.0088
253 0.0088 0.0001 0.0087
254 0.0087 0.0001 0.0087
255 0.0087 0.0001 0.0086
256 0.0086 0.0001 0.0085
257 0.0085 0.0001 0.0084
258 0.0084 0.0001 0.0083
259 0.0084 0.0001 0.0083
260 0.0083 0.0001 0.0082
261 0.0082 0.0001 0.0081
262 0.0081 0.0001 0.0081
263 0.0081 0.0001 0.0080
264 0.0080 0.0001 0.0079
265 0.0079 0.0001 0.0079
266 0.0079 0.0001 0.0078
267 0.0078 0.0001 0.0077
268 0.0078 0.0001 0.0077
269 0.0077 0.0001 0.0076
270 0.0076 0.0001 0.0076
271 0.0076 0.0001 0.0075
272 0.0075 0.0001 0.0075
273 0.0075 0.0001 0.0074
274 0.0074 0.0001 0.0073
275 0.0074 0.0001 0.0073
276 0.0073 0.0001 0.0072
277 0.0073 0.0001 0.0072
278 0.0072 0.0001 0.0071
279 0.0072 0.0001 0.0071
280 0.0071 0.0001 0.0070
281 0.0071 0.0001 0.0070
282 0.0070 0.0001 0.0070
283 0.0070 0.0001 0.0069
284 0.0069 0.0001 0.0069
285 0.0069 0.0001 0.0068
286 0.0068 0.0001 0.0068
287 0.0068 0.0001 0.0067
288 0.0068 0.0001 0.0067
TOTAL STORM RAINFALL(INCHES) = 4.65
TOTAL SOIL-LOSS(INCHES) = 0.04
TOTAL EFFECTIVE RAINFALL(INCHES) = 4.61
---------------------------------------------------------------------------- TOTAL SOIL-LOSS VOLUME(ACRE-FEET) = 0.2779
TOTAL STORM RUNOFF VOLUME(ACRE-FEET) = 29.2687
----------------------------------------------------------------------------
============================================================================ 2 4 - 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 FIVE-MINUTE UNIT INTERVALS(CFS)
(Note: Time indicated is at END of Each Unit Intervals) ---------------------------------------------------------------------------- TIME(HRS) VOLUME(AF) Q(CFS) 0. 50.0 100.0 150.0 200.0
----------------------------------------------------------------------------
0.083 0.0033 0.48 Q . . . .
0.167 0.0251 3.17 Q . . . .
0.250 0.0585 4.86 Q . . . .
0.333 0.0965 5.52 VQ . . . .
0.417 0.1370 5.88 VQ . . . .
0.500 0.1788 6.06 VQ . . . .
0.583 0.2209 6.13 VQ . . . .
0.667 0.2634 6.17 VQ . . . .
0.750 0.3062 6.21 VQ . . . .
0.833 0.3493 6.25 VQ . . . .
0.917 0.3926 6.30 VQ . . . .
1.000 0.4362 6.33 VQ . . . .
1.083 0.4799 6.35 VQ . . . .
1.167 0.5238 6.37 VQ . . . .
1.250 0.5677 6.39 VQ . . . .
1.333 0.6119 6.41 VQ . . . .
1.417 0.6562 6.43 VQ . . . .
1.500 0.7006 6.45 VQ . . . .
1.583 0.7452 6.47 .Q . . . .
1.667 0.7899 6.49 .Q . . . .
1.750 0.8347 6.51 .Q . . . .
1.833 0.8798 6.54 .Q . . . .
1.917 0.9249 6.56 .Q . . . .
2.000 0.9703 6.58 .Q . . . .
2.083 1.0157 6.60 .Q . . . .
2.167 1.0614 6.63 .Q . . . .
2.250 1.1072 6.65 .Q . . . .
2.333 1.1532 6.67 .Q . . . .
2.417 1.1993 6.70 .Q . . . .
2.500 1.2456 6.72 .Q . . . .
2.583 1.2920 6.74 .Q . . . .
2.667 1.3386 6.77 .Q . . . .
2.750 1.3854 6.79 .Q . . . .
2.833 1.4324 6.82 .Q . . . .
2.917 1.4795 6.84 .QV . . . .
3.000 1.5268 6.87 .QV . . . .
3.083 1.5743 6.89 .QV . . . .
3.167 1.6219 6.92 .QV . . . .
3.250 1.6697 6.94 .QV . . . .
3.333 1.7177 6.97 .QV . . . .
3.417 1.7659 7.00 .QV . . . .
3.500 1.8143 7.02 .QV . . . .
3.583 1.8629 7.05 .QV . . . .
3.667 1.9116 7.08 .QV . . . .
3.750 1.9605 7.10 .QV . . . .
3.833 2.0097 7.13 .QV . . . .
3.917 2.0590 7.16 .QV . . . .
4.000 2.1085 7.19 .QV . . . .
4.083 2.1582 7.22 .QV . . . .
4.167 2.2082 7.25 .Q V . . . .
4.250 2.2583 7.28 .Q V . . . .
4.333 2.3086 7.31 .Q V . . . .
4.417 2.3591 7.34 .Q V . . . .
4.500 2.4099 7.37 .Q V . . . .
4.583 2.4608 7.40 .Q V . . . .
4.667 2.5120 7.43 .Q V . . . .
4.750 2.5634 7.46 .Q V . . . .
4.833 2.6150 7.49 .Q V . . . .
4.917 2.6668 7.52 .Q V . . . .
5.000 2.7188 7.56 .Q V . . . .
5.083 2.7711 7.59 .Q V . . . .
5.167 2.8236 7.62 .Q V . . . .
5.250 2.8763 7.66 .Q V . . . .
5.333 2.9293 7.69 .Q V . . . .
5.417 2.9825 7.72 .Q V . . . .
5.500 3.0360 7.76 .Q V . . . .
5.583 3.0897 7.80 .Q V . . . .
5.667 3.1436 7.83 .Q V . . . .
5.750 3.1978 7.87 .Q V . . . .
5.833 3.2522 7.91 .Q V . . . .
5.917 3.3069 7.94 .Q V . . . .
6.000 3.3619 7.98 .Q V . . . .
6.083 3.4171 8.02 .Q V . . . .
6.167 3.4726 8.06 .Q V . . . .
6.250 3.5284 8.10 .Q V . . . .
6.333 3.5844 8.14 .Q V . . . .
6.417 3.6407 8.18 .Q V . . . .
6.500 3.6973 8.22 .Q V . . . .
6.583 3.7542 8.26 .Q V . . . .
6.667 3.8113 8.30 .Q V . . . .
6.750 3.8688 8.34 .Q V . . . .
6.833 3.9266 8.39 .Q V . . . .
6.917 3.9846 8.43 .Q V . . . .
7.000 4.0430 8.48 .Q V . . . .
7.083 4.1016 8.52 .Q V . . . .
7.167 4.1606 8.57 .Q V . . . .
7.250 4.2199 8.61 .Q V . . . .
7.333 4.2796 8.66 .Q V . . . .
7.417 4.3395 8.70 .Q V . . . .
7.500 4.3998 8.76 .Q V . . . .
7.583 4.4604 8.80 .Q V . . . .
7.667 4.5214 8.85 .Q V . . . .
7.750 4.5827 8.90 .Q V . . . .
7.833 4.6444 8.96 .Q V . . . .
7.917 4.7064 9.01 .Q V . . . .
8.000 4.7688 9.06 .Q V . . . .
8.083 4.8316 9.11 .Q V . . . .
8.167 4.8948 9.17 .Q V . . . .
8.250 4.9583 9.22 .Q V . . . .
8.333 5.0222 9.28 .Q V . . . .
8.417 5.0866 9.34 .Q V . . . .
8.500 5.1513 9.40 .Q V . . . .
8.583 5.2164 9.46 .Q V . . . .
8.667 5.2820 9.52 .Q V . . . .
8.750 5.3480 9.58 .Q V . . . .
8.833 5.4144 9.65 .Q V . . . .
8.917 5.4812 9.71 .Q V . . . .
9.000 5.5486 9.77 .Q V . . . .
9.083 5.6163 9.84 .Q V . . . .
9.167 5.6846 9.91 .Q V . . . .
9.250 5.7533 9.97 .Q V . . . .
9.333 5.8225 10.05 . Q V . . . .
9.417 5.8921 10.12 . Q V . . . .
9.500 5.9623 10.19 . Q V . . . .
9.583 6.0330 10.26 . Q V . . . .
9.667 6.1042 10.34 . Q V . . . .
9.750 6.1760 10.42 . Q V . . . .
9.833 6.2483 10.50 . Q V . . . .
9.917 6.3211 10.58 . Q V . . . .
10.000 6.3946 10.66 . Q V . . . .
10.083 6.4686 10.74 . Q V . . . .
10.167 6.5432 10.83 . Q V . . . .
10.250 6.6184 10.92 . Q V. . . .
10.333 6.6942 11.01 . Q V. . . .
10.417 6.7706 11.10 . Q V. . . .
10.500 6.8478 11.20 . Q V. . . .
10.583 6.9255 11.29 . Q V. . . .
10.667 7.0040 11.39 . Q V. . . .
10.750 7.0831 11.49 . Q V. . . .
10.833 7.1630 11.60 . Q V. . . .
10.917 7.2435 11.70 . Q V. . . .
11.000 7.3249 11.81 . Q V . . .
11.083 7.4070 11.92 . Q V . . .
11.167 7.4899 12.04 . Q V . . .
11.250 7.5735 12.15 . Q V . . .
11.333 7.6581 12.28 . Q V . . .
11.417 7.7434 12.39 . Q V . . .
11.500 7.8297 12.53 . Q V . . .
11.583 7.9168 12.65 . Q V . . .
11.667 8.0049 12.79 . Q V . . .
11.750 8.0939 12.92 . Q .V . . .
11.833 8.1840 13.07 . Q .V . . .
11.917 8.2750 13.21 . Q .V . . .
12.000 8.3671 13.37 . Q .V . . .
12.083 8.4611 13.65 . Q .V . . .
12.167 8.5612 14.53 . Q .V . . .
12.250 8.6654 15.14 . Q .V . . .
12.333 8.7722 15.50 . Q .V . . .
12.417 8.8807 15.76 . Q . V . . .
12.500 8.9909 16.00 . Q . V . . .
12.583 9.1025 16.20 . Q . V . . .
12.667 9.2156 16.42 . Q . V . . .
12.750 9.3301 16.62 . Q . V . . .
12.833 9.4462 16.86 . Q . V . . .
12.917 9.5639 17.08 . Q . V . . .
13.000 9.6832 17.33 . Q . V . . .
13.083 9.8042 17.56 . Q . V . . .
13.167 9.9270 17.83 . Q . V . . .
13.250 10.0515 18.08 . Q . V . . .
13.333 10.1780 18.37 . Q . V . . .
13.417 10.3065 18.65 . Q . V . . .
13.500 10.4371 18.97 . Q . V . . .
13.583 10.5698 19.27 . Q . V . . .
13.667 10.7049 19.62 . Q . V . . .
13.750 10.8424 19.95 . Q . V . . .
13.833 10.9825 20.34 . Q . V . . .
13.917 11.1251 20.71 . Q . V . . .
14.000 11.2708 21.15 . Q . V . . .
14.083 11.4196 21.61 . Q . V . . .
14.167 11.5737 22.37 . Q . V . . .
14.250 11.7321 23.01 . Q . V . . .
14.333 11.8949 23.63 . Q . V . . .
14.417 12.0615 24.20 . Q . V . . .
14.500 12.2327 24.86 . Q . V . . .
14.583 12.4082 25.48 . Q . V . . .
14.667 12.5889 26.23 . Q . V . . .
14.750 12.7746 26.96 . Q . V . . .
14.833 12.9664 27.85 . Q . V . . .
14.917 13.1642 28.72 . Q . V . . .
15.000 13.3694 29.80 . Q . V . . .
15.083 13.5820 30.86 . Q . V . . .
15.167 13.8038 32.20 . Q . V . . .
15.250 14.0348 33.55 . Q . V. . .
15.333 14.2779 35.29 . Q . V. . .
15.417 14.5364 37.54 . Q . V. . .
15.500 14.8295 42.55 . Q . V . .
15.583 15.1513 46.72 . Q. V . .
15.667 15.5013 50.83 . Q .V . .
15.750 15.8799 54.97 . Q .V . .
15.833 16.2967 60.51 . . Q . V . .
15.917 16.7639 67.84 . . Q . V . .
16.000 17.3335 82.70 . . Q . V . .
16.083 18.1119 113.02 . . . Q V . .
16.167 19.3016 172.75 . . . V . Q .
16.250 20.2253 134.12 . . . QV . .
16.333 20.8570 91.73 . . Q . V . .
16.417 21.3461 71.01 . . Q . V. .
16.500 21.7221 54.60 . Q . V. .
16.583 22.0212 43.42 . Q . . V .
16.667 22.2815 37.80 . Q . . V .
16.750 22.5173 34.24 . Q . . V .
16.833 22.7344 31.53 . Q . . .V .
16.917 22.9363 29.30 . Q . . .V .
17.000 23.1225 27.04 . Q . . .V .
17.083 23.2961 25.21 . Q . . .V .
17.167 23.4589 23.64 . Q . . . V .
17.250 23.6129 22.36 . Q . . . V .
17.333 23.7599 21.35 . Q . . . V .
17.417 23.9010 20.48 . Q . . . V .
17.500 24.0368 19.72 . Q . . . V .
17.583 24.1680 19.05 . Q . . . V .
17.667 24.2950 18.44 . Q . . . V .
17.750 24.4182 17.89 . Q . . . V .
17.833 24.5379 17.38 . Q . . . V .
17.917 24.6543 16.91 . Q . . . V .
18.000 24.7678 16.47 . Q . . . V .
18.083 24.8776 15.95 . Q . . . V .
18.167 24.9799 14.86 . Q . . . V .
18.250 25.0768 14.06 . Q . . . V .
18.333 25.1702 13.57 . Q . . . V .
18.417 25.2610 13.18 . Q . . . V .
18.500 25.3495 12.85 . Q . . . V .
18.583 25.4361 12.57 . Q . . . V .
18.667 25.5208 12.31 . Q . . . V .
18.750 25.6039 12.07 . Q . . . V .
18.833 25.6854 11.83 . Q . . . V .
18.917 25.7654 11.61 . Q . . . V .
19.000 25.8439 11.40 . Q . . . V .
19.083 25.9211 11.21 . Q . . . V .
19.167 25.9970 11.02 . Q . . . V .
19.250 26.0717 10.84 . Q . . . V .
19.333 26.1452 10.67 . Q . . . V .
19.417 26.2175 10.51 . Q . . . V .
19.500 26.2888 10.35 . Q . . . V .
19.583 26.3591 10.20 . Q . . . V .
19.667 26.4283 10.05 . Q . . . V .
19.750 26.4966 9.91 .Q . . . V .
19.833 26.5639 9.78 .Q . . . V .
19.917 26.6304 9.65 .Q . . . V .
20.000 26.6960 9.53 .Q . . . V .
20.083 26.7608 9.40 .Q . . . V .
20.167 26.8248 9.29 .Q . . . V .
20.250 26.8879 9.18 .Q . . . V .
20.333 26.9504 9.07 .Q . . . V .
20.417 27.0121 8.96 .Q . . . V .
20.500 27.0731 8.86 .Q . . . V .
20.583 27.1334 8.76 .Q . . . V .
20.667 27.1931 8.66 .Q . . . V .
20.750 27.2521 8.57 .Q . . . V .
20.833 27.3105 8.48 .Q . . . V .
20.917 27.3683 8.39 .Q . . . V .
21.000 27.4255 8.30 .Q . . . V .
21.083 27.4821 8.22 .Q . . . V .
21.167 27.5381 8.14 .Q . . . V .
21.250 27.5936 8.06 .Q . . . V .
21.333 27.6486 7.98 .Q . . . V .
21.417 27.7031 7.91 .Q . . . V .
21.500 27.7571 7.83 .Q . . . V .
21.583 27.8105 7.76 .Q . . . V .
21.667 27.8635 7.69 .Q . . . V .
21.750 27.9160 7.63 .Q . . . V .
21.833 27.9681 7.56 .Q . . . V .
21.917 28.0197 7.49 .Q . . . V .
22.000 28.0709 7.43 .Q . . . V .
22.083 28.1216 7.37 .Q . . . V .
22.167 28.1720 7.31 .Q . . . V .
22.250 28.2219 7.25 .Q . . . V .
22.333 28.2715 7.19 .Q . . . V .
22.417 28.3206 7.14 .Q . . . V .
22.500 28.3694 7.08 .Q . . . V .
22.583 28.4177 7.03 .Q . . . V .
22.667 28.4658 6.97 .Q . . . V .
22.750 28.5134 6.92 .Q . . . V .
22.833 28.5607 6.87 .Q . . . V.
22.917 28.6077 6.82 .Q . . . V.
23.000 28.6543 6.77 .Q . . . V.
23.083 28.7006 6.72 .Q . . . V.
23.167 28.7466 6.68 .Q . . . V.
23.250 28.7922 6.63 .Q . . . V.
23.333 28.8376 6.58 .Q . . . V.
23.417 28.8826 6.54 .Q . . . V.
23.500 28.9273 6.49 .Q . . . V.
23.583 28.9718 6.45 .Q . . . V.
23.667 29.0159 6.41 .Q . . . V.
23.750 29.0598 6.37 .Q . . . V.
23.833 29.1034 6.33 .Q . . . V.
23.917 29.1467 6.29 .Q . . . V.
24.000 29.1897 6.25 .Q . . . V.
24.083 29.2292 5.73 .Q . . . V.
24.167 29.2499 3.02 Q . . . V.
24.250 29.2590 1.32 Q . . . V.
24.333 29.2636 0.67 Q . . . V.
24.417 29.2658 0.32 Q . . . V.
24.500 29.2668 0.15 Q . . . V.
24.583 29.2675 0.10 Q . . . V.
24.667 29.2681 0.08 Q . . . V.
24.750 29.2685 0.06 Q . . . V.
24.833 29.2687 0.03 Q . . . V.
24.917 29.2687 0.01 Q . . . V.
----------------------------------------------------------------------------- ---
TIME DURATION(minutes) OF PERCENTILES OF ESTIMATED PEAK FLOW RATE:
(Note: 100% of Peak Flow Rate estimate assumed to have
an instantaneous time duration)
Percentile of Estimated Duration
Peak Flow Rate (minutes)
======================= =========
0% 1495.0
10% 295.0
20% 85.0
30% 50.0
40% 30.0
50% 20.0
60% 15.0
70% 10.0
80% 5.0
90% 5.0
============================================================================ END OF FLOODSCx ROUTING ANALYSIS
____________________________________________________________________________ ****************************************************************************
F L O O D R O U T I N G A N A L Y S I S
USING COUNTY HYDROLOGY MANUAL OF SAN BERNARDINO(1986)
(c) Copyright 1989-2015 Advanced Engineering Software (aes) Ver. 22.0 Release Date: 07/01/2015 License ID 1673
Analysis prepared by:
************************** DESCRIPTION OF STUDY ************************** * [PICO 100 YEAR *
* ZSNYDER 3/20/2019 *
* *
************************************************************************** FILE NAME: PICO.DAT
TIME/DATE OF STUDY: 14:46 03/20/2019
**************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>SUBAREA RUNOFF (UNIT-HYDROGRAPH ANALYSIS)<<<<<
============================================================================ (UNIT-HYDROGRAPH ADDED TO STREAM #1)
WATERCOURSE LENGTH = 2883.000 FEET
LENGTH FROM CONCENTRATION POINT TO CENTROID = 1496.000 FEET ELEVATION VARIATION ALONG WATERCOURSE = 1206.000 FEET
BASIN FACTOR = 0.050
WATERSHED AREA = 55.500 ACRES
BASEFLOW = 0.000 CFS/SQUARE-MILE
WATERCOURSE "LAG" TIME = 0.137 HOURS
CAUTION: LAG TIME IS LESS THAN 0.50 HOURS.
THE 5-MINUTE PERIOD UH MODEL (USED IN THIS COMPUTER PROGRAM) MAY BE TOO LARGE FOR PEAK FLOW ESTIMATES.
FOOTHILL S-GRAPH SELECTED
MAXIMUM WATERSHED LOSS RATE(INCH/HOUR) = 0.010
LOW LOSS FRACTION = 0.010
OFFSITE Pico Watershed UH Calculations Page 243 of 847
*HYDROGRAPH MODEL #1 SPECIFIED*
SPECIFIED PEAK 5-MINUTES RAINFALL(INCH)= 0.29
SPECIFIED PEAK 30-MINUTES RAINFALL(INCH)= 0.76
SPECIFIED PEAK 1-HOUR RAINFALL(INCH) = 1.12
SPECIFIED PEAK 3-HOUR RAINFALL(INCH) = 1.89
SPECIFIED PEAK 6-HOUR RAINFALL(INCH) = 2.61
SPECIFIED PEAK 24-HOUR RAINFALL(INCH) = 4.65
PRECIPITATION DEPTH-AREA REDUCTION FACTORS:
5-MINUTE FACTOR = 0.998
30-MINUTE FACTOR = 0.998
1-HOUR FACTOR = 0.998
3-HOUR FACTOR = 1.000
6-HOUR FACTOR = 1.000
24-HOUR FACTOR = 1.000
UNIT HYDROGRAPH TIME UNIT = 5.000 MINUTES
UNIT INTERVAL PERCENTAGE OF LAG-TIME = 60.955
============================================================================
UNIT HYDROGRAPH DETERMINATION
---------------------------------------------------------------------------- INTERVAL "S" GRAPH UNIT HYDROGRAPH
NUMBER MEAN VALUES ORDINATES(CFS)
---------------------------------------------------------------------------- 1 5.755 38.625
2 38.405 219.150
3 71.824 224.310
4 84.051 82.068
5 91.034 46.868
6 95.248 28.289
7 97.493 15.067
8 98.244 5.039
9 98.559 2.116
10 98.875 2.116
11 99.190 2.116
12 99.505 2.116
13 99.820 2.116
14 100.000 1.207
****************************************************************************
UNIT UNIT UNIT EFFECTIVE
PERIOD RAINFALL SOIL-LOSS RAINFALL
(NUMBER) (INCHES) (INCHES) (INCHES)
---------------------------------------------------------------------------- 1 0.0067 0.0001 0.0067
2 0.0067 0.0001 0.0067
3 0.0068 0.0001 0.0067
4 0.0068 0.0001 0.0067
5 0.0068 0.0001 0.0067
6 0.0068 0.0001 0.0068
7 0.0069 0.0001 0.0068
8 0.0069 0.0001 0.0068
9 0.0069 0.0001 0.0068
10 0.0069 0.0001 0.0068
11 0.0069 0.0001 0.0069
12 0.0070 0.0001 0.0069
13 0.0070 0.0001 0.0069
14 0.0070 0.0001 0.0069
15 0.0070 0.0001 0.0070
16 0.0071 0.0001 0.0070
17 0.0071 0.0001 0.0070
18 0.0071 0.0001 0.0070
19 0.0071 0.0001 0.0071
20 0.0071 0.0001 0.0071
21 0.0072 0.0001 0.0071
22 0.0072 0.0001 0.0071
23 0.0072 0.0001 0.0072
24 0.0072 0.0001 0.0072
25 0.0073 0.0001 0.0072
26 0.0073 0.0001 0.0072
27 0.0073 0.0001 0.0073
28 0.0073 0.0001 0.0073
29 0.0074 0.0001 0.0073
30 0.0074 0.0001 0.0073
31 0.0074 0.0001 0.0074
32 0.0075 0.0001 0.0074
33 0.0075 0.0001 0.0074
34 0.0075 0.0001 0.0074
35 0.0075 0.0001 0.0075
36 0.0076 0.0001 0.0075
37 0.0076 0.0001 0.0075
38 0.0076 0.0001 0.0075
39 0.0077 0.0001 0.0076
40 0.0077 0.0001 0.0076
41 0.0077 0.0001 0.0076
42 0.0077 0.0001 0.0077
43 0.0078 0.0001 0.0077
44 0.0078 0.0001 0.0077
45 0.0078 0.0001 0.0078
46 0.0079 0.0001 0.0078
47 0.0079 0.0001 0.0078
48 0.0079 0.0001 0.0078
49 0.0080 0.0001 0.0079
50 0.0080 0.0001 0.0079
51 0.0080 0.0001 0.0080
52 0.0081 0.0001 0.0080
53 0.0081 0.0001 0.0080
54 0.0081 0.0001 0.0080
55 0.0082 0.0001 0.0081
56 0.0082 0.0001 0.0081
57 0.0082 0.0001 0.0082
58 0.0083 0.0001 0.0082
59 0.0083 0.0001 0.0082
60 0.0083 0.0001 0.0082
61 0.0084 0.0001 0.0083
62 0.0084 0.0001 0.0083
63 0.0085 0.0001 0.0084
64 0.0085 0.0001 0.0084
65 0.0085 0.0001 0.0084
66 0.0086 0.0001 0.0085
67 0.0086 0.0001 0.0085
68 0.0086 0.0001 0.0086
69 0.0087 0.0001 0.0086
70 0.0087 0.0001 0.0086
71 0.0088 0.0001 0.0087
72 0.0088 0.0001 0.0087
73 0.0089 0.0001 0.0088
74 0.0089 0.0001 0.0088
75 0.0089 0.0001 0.0089
76 0.0090 0.0001 0.0089
77 0.0090 0.0001 0.0089
78 0.0091 0.0001 0.0090
79 0.0091 0.0001 0.0090
80 0.0092 0.0001 0.0091
81 0.0092 0.0001 0.0091
82 0.0093 0.0001 0.0092
83 0.0093 0.0001 0.0092
84 0.0094 0.0001 0.0093
85 0.0094 0.0001 0.0093
86 0.0095 0.0001 0.0094
87 0.0095 0.0001 0.0094
88 0.0096 0.0001 0.0095
89 0.0096 0.0001 0.0095
90 0.0097 0.0001 0.0096
91 0.0097 0.0001 0.0096
92 0.0098 0.0001 0.0097
93 0.0099 0.0001 0.0098
94 0.0099 0.0001 0.0098
95 0.0100 0.0001 0.0099
96 0.0100 0.0001 0.0099
97 0.0101 0.0001 0.0100
98 0.0101 0.0001 0.0100
99 0.0102 0.0001 0.0101
100 0.0103 0.0001 0.0102
101 0.0104 0.0001 0.0103
102 0.0104 0.0001 0.0103
103 0.0105 0.0001 0.0104
104 0.0105 0.0001 0.0104
105 0.0106 0.0001 0.0105
106 0.0107 0.0001 0.0106
107 0.0108 0.0001 0.0107
108 0.0108 0.0001 0.0107
109 0.0109 0.0001 0.0108
110 0.0110 0.0001 0.0109
111 0.0111 0.0001 0.0110
112 0.0111 0.0001 0.0110
113 0.0112 0.0001 0.0111
114 0.0113 0.0001 0.0112
115 0.0114 0.0001 0.0113
116 0.0115 0.0001 0.0113
117 0.0116 0.0001 0.0115
118 0.0116 0.0001 0.0115
119 0.0118 0.0001 0.0116
120 0.0118 0.0001 0.0117
121 0.0120 0.0001 0.0118
122 0.0120 0.0001 0.0119
123 0.0122 0.0001 0.0120
124 0.0122 0.0001 0.0121
125 0.0124 0.0001 0.0122
126 0.0124 0.0001 0.0123
127 0.0126 0.0001 0.0125
128 0.0127 0.0001 0.0125
129 0.0128 0.0001 0.0127
130 0.0129 0.0001 0.0128
131 0.0130 0.0001 0.0129
132 0.0131 0.0001 0.0130
133 0.0133 0.0001 0.0132
134 0.0134 0.0001 0.0133
135 0.0136 0.0001 0.0134
136 0.0137 0.0001 0.0135
137 0.0139 0.0001 0.0137
138 0.0139 0.0001 0.0138
139 0.0141 0.0001 0.0140
140 0.0143 0.0001 0.0141
141 0.0145 0.0001 0.0143
142 0.0146 0.0001 0.0144
143 0.0148 0.0001 0.0147
144 0.0149 0.0001 0.0148
145 0.0170 0.0002 0.0168
146 0.0171 0.0002 0.0169
147 0.0173 0.0002 0.0172
148 0.0175 0.0002 0.0173
149 0.0178 0.0002 0.0176
150 0.0179 0.0002 0.0177
151 0.0182 0.0002 0.0180
152 0.0184 0.0002 0.0182
153 0.0187 0.0002 0.0185
154 0.0189 0.0002 0.0187
155 0.0192 0.0002 0.0190
156 0.0194 0.0002 0.0192
157 0.0198 0.0002 0.0196
158 0.0200 0.0002 0.0198
159 0.0204 0.0002 0.0202
160 0.0206 0.0002 0.0204
161 0.0211 0.0002 0.0209
162 0.0213 0.0002 0.0211
163 0.0218 0.0002 0.0216
164 0.0221 0.0002 0.0219
165 0.0227 0.0002 0.0224
166 0.0230 0.0002 0.0227
167 0.0236 0.0002 0.0234
168 0.0239 0.0002 0.0237
169 0.0253 0.0003 0.0250
170 0.0257 0.0003 0.0254
171 0.0265 0.0003 0.0262
172 0.0269 0.0003 0.0266
173 0.0278 0.0003 0.0276
174 0.0284 0.0003 0.0281
175 0.0294 0.0003 0.0292
176 0.0300 0.0003 0.0297
177 0.0314 0.0003 0.0310
178 0.0321 0.0003 0.0318
179 0.0337 0.0003 0.0333
180 0.0346 0.0003 0.0342
181 0.0366 0.0004 0.0362
182 0.0377 0.0004 0.0373
183 0.0403 0.0004 0.0399
184 0.0419 0.0004 0.0415
185 0.0522 0.0005 0.0517
186 0.0544 0.0005 0.0539
187 0.0598 0.0006 0.0592
188 0.0633 0.0006 0.0627
189 0.0715 0.0007 0.0707
190 0.0785 0.0008 0.0777
191 0.1031 0.0008 0.1023
192 0.1317 0.0008 0.1309
193 0.2903 0.0008 0.2894
194 0.0881 0.0008 0.0873
195 0.0675 0.0007 0.0668
196 0.0569 0.0006 0.0563
197 0.0436 0.0004 0.0432
198 0.0390 0.0004 0.0386
199 0.0355 0.0004 0.0352
200 0.0328 0.0003 0.0325
201 0.0307 0.0003 0.0304
202 0.0289 0.0003 0.0286
203 0.0274 0.0003 0.0271
204 0.0261 0.0003 0.0258
205 0.0243 0.0002 0.0240
206 0.0233 0.0002 0.0230
207 0.0224 0.0002 0.0222
208 0.0216 0.0002 0.0214
209 0.0209 0.0002 0.0206
210 0.0202 0.0002 0.0200
211 0.0196 0.0002 0.0194
212 0.0190 0.0002 0.0189
213 0.0185 0.0002 0.0183
214 0.0181 0.0002 0.0179
215 0.0176 0.0002 0.0174
216 0.0172 0.0002 0.0170
217 0.0150 0.0002 0.0149
218 0.0147 0.0001 0.0145
219 0.0144 0.0001 0.0142
220 0.0140 0.0001 0.0139
221 0.0138 0.0001 0.0136
222 0.0135 0.0001 0.0133
223 0.0132 0.0001 0.0131
224 0.0130 0.0001 0.0128
225 0.0127 0.0001 0.0126
226 0.0125 0.0001 0.0124
227 0.0123 0.0001 0.0122
228 0.0121 0.0001 0.0120
229 0.0119 0.0001 0.0118
230 0.0117 0.0001 0.0116
231 0.0115 0.0001 0.0114
232 0.0113 0.0001 0.0112
233 0.0112 0.0001 0.0111
234 0.0110 0.0001 0.0109
235 0.0109 0.0001 0.0108
236 0.0107 0.0001 0.0106
237 0.0106 0.0001 0.0105
238 0.0104 0.0001 0.0103
239 0.0103 0.0001 0.0102
240 0.0102 0.0001 0.0101
241 0.0101 0.0001 0.0100
242 0.0099 0.0001 0.0098
243 0.0098 0.0001 0.0097
244 0.0097 0.0001 0.0096
245 0.0096 0.0001 0.0095
246 0.0095 0.0001 0.0094
247 0.0094 0.0001 0.0093
248 0.0093 0.0001 0.0092
249 0.0092 0.0001 0.0091
250 0.0091 0.0001 0.0090
251 0.0090 0.0001 0.0089
252 0.0089 0.0001 0.0088
253 0.0088 0.0001 0.0087
254 0.0087 0.0001 0.0087
255 0.0087 0.0001 0.0086
256 0.0086 0.0001 0.0085
257 0.0085 0.0001 0.0084
258 0.0084 0.0001 0.0083
259 0.0084 0.0001 0.0083
260 0.0083 0.0001 0.0082
261 0.0082 0.0001 0.0081
262 0.0081 0.0001 0.0081
263 0.0081 0.0001 0.0080
264 0.0080 0.0001 0.0079
265 0.0079 0.0001 0.0079
266 0.0079 0.0001 0.0078
267 0.0078 0.0001 0.0077
268 0.0078 0.0001 0.0077
269 0.0077 0.0001 0.0076
270 0.0076 0.0001 0.0076
271 0.0076 0.0001 0.0075
272 0.0075 0.0001 0.0075
273 0.0075 0.0001 0.0074
274 0.0074 0.0001 0.0073
275 0.0074 0.0001 0.0073
276 0.0073 0.0001 0.0072
277 0.0073 0.0001 0.0072
278 0.0072 0.0001 0.0071
279 0.0072 0.0001 0.0071
280 0.0071 0.0001 0.0070
281 0.0071 0.0001 0.0070
282 0.0070 0.0001 0.0070
283 0.0070 0.0001 0.0069
284 0.0069 0.0001 0.0069
285 0.0069 0.0001 0.0068
286 0.0068 0.0001 0.0068
287 0.0068 0.0001 0.0067
288 0.0068 0.0001 0.0067
TOTAL STORM RAINFALL(INCHES) = 4.65
TOTAL SOIL-LOSS(INCHES) = 0.04
TOTAL EFFECTIVE RAINFALL(INCHES) = 4.61
---------------------------------------------------------------------------- TOTAL SOIL-LOSS VOLUME(ACRE-FEET) = 0.2021
TOTAL STORM RUNOFF VOLUME(ACRE-FEET) = 21.2908
----------------------------------------------------------------------------
============================================================================ 2 4 - 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 FIVE-MINUTE UNIT INTERVALS(CFS)
(Note: Time indicated is at END of Each Unit Intervals) ---------------------------------------------------------------------------- TIME(HRS) VOLUME(AF) Q(CFS) 0. 50.0 100.0 150.0 200.0
----------------------------------------------------------------------------
0.083 0.0018 0.26 Q . . . .
0.167 0.0136 1.72 Q . . . .
0.250 0.0358 3.22 Q . . . .
0.333 0.0618 3.77 Q . . . .
0.417 0.0900 4.10 Q . . . .
0.500 0.1196 4.30 Q . . . .
0.583 0.1500 4.41 Q . . . .
0.667 0.1807 4.46 Q . . . .
0.750 0.2116 4.49 Q . . . .
0.833 0.2427 4.52 Q . . . .
0.917 0.2740 4.55 Q . . . .
1.000 0.3055 4.57 Q . . . .
1.083 0.3372 4.60 Q . . . .
1.167 0.3691 4.63 Q . . . .
1.250 0.4011 4.64 Q . . . .
1.333 0.4331 4.66 Q . . . .
1.417 0.4653 4.67 Q . . . .
1.500 0.4976 4.69 Q . . . .
1.583 0.5299 4.70 Q . . . .
1.667 0.5624 4.72 QV . . . .
1.750 0.5950 4.73 QV . . . .
1.833 0.6277 4.75 QV . . . .
1.917 0.6606 4.77 QV . . . .
2.000 0.6935 4.78 QV . . . .
2.083 0.7265 4.80 QV . . . .
2.167 0.7597 4.81 QV . . . .
2.250 0.7930 4.83 QV . . . .
2.333 0.8263 4.85 QV . . . .
2.417 0.8599 4.86 QV . . . .
2.500 0.8935 4.88 QV . . . .
2.583 0.9272 4.90 QV . . . .
2.667 0.9611 4.92 QV . . . .
2.750 0.9951 4.93 QV . . . .
2.833 1.0292 4.95 QV . . . .
2.917 1.0634 4.97 QV . . . .
3.000 1.0978 4.99 Q V . . . .
3.083 1.1322 5.01 .QV . . . .
3.167 1.1669 5.03 .QV . . . .
3.250 1.2016 5.04 .QV . . . .
3.333 1.2365 5.06 .QV . . . .
3.417 1.2715 5.08 .QV . . . .
3.500 1.3066 5.10 .QV . . . .
3.583 1.3419 5.12 .QV . . . .
3.667 1.3773 5.14 .QV . . . .
3.750 1.4128 5.16 .QV . . . .
3.833 1.4485 5.18 .QV . . . .
3.917 1.4843 5.20 .QV . . . .
4.000 1.5203 5.22 .QV . . . .
4.083 1.5564 5.24 .QV . . . .
4.167 1.5927 5.26 .QV . . . .
4.250 1.6291 5.29 .Q V . . . .
4.333 1.6656 5.31 .Q V . . . .
4.417 1.7023 5.33 .Q V . . . .
4.500 1.7392 5.35 .Q V . . . .
4.583 1.7762 5.37 .Q V . . . .
4.667 1.8134 5.40 .Q V . . . .
4.750 1.8507 5.42 .Q V . . . .
4.833 1.8881 5.44 .Q V . . . .
4.917 1.9258 5.46 .Q V . . . .
5.000 1.9636 5.49 .Q V . . . .
5.083 2.0015 5.51 .Q V . . . .
5.167 2.0397 5.54 .Q V . . . .
5.250 2.0780 5.56 .Q V . . . .
5.333 2.1164 5.59 .Q V . . . .
5.417 2.1551 5.61 .Q V . . . .
5.500 2.1939 5.64 .Q V . . . .
5.583 2.2329 5.66 .Q V . . . .
5.667 2.2720 5.69 .Q V . . . .
5.750 2.3114 5.71 .Q V . . . .
5.833 2.3509 5.74 .Q V . . . .
5.917 2.3906 5.77 .Q V . . . .
6.000 2.4306 5.79 .Q V . . . .
6.083 2.4707 5.82 .Q V . . . .
6.167 2.5109 5.85 .Q V . . . .
6.250 2.5514 5.88 .Q V . . . .
6.333 2.5921 5.91 .Q V . . . .
6.417 2.6330 5.94 .Q V . . . .
6.500 2.6741 5.97 .Q V . . . .
6.583 2.7154 6.00 .Q V . . . .
6.667 2.7569 6.03 .Q V . . . .
6.750 2.7986 6.06 .Q V . . . .
6.833 2.8405 6.09 .Q V . . . .
6.917 2.8827 6.12 .Q V . . . .
7.000 2.9251 6.15 .Q V . . . .
7.083 2.9676 6.18 .Q V . . . .
7.167 3.0105 6.22 .Q V . . . .
7.250 3.0535 6.25 .Q V . . . .
7.333 3.0968 6.29 .Q V . . . .
7.417 3.1403 6.32 .Q V . . . .
7.500 3.1841 6.35 .Q V . . . .
7.583 3.2281 6.39 .Q V . . . .
7.667 3.2724 6.43 .Q V . . . .
7.750 3.3169 6.46 .Q V . . . .
7.833 3.3616 6.50 .Q V . . . .
7.917 3.4067 6.54 .Q V . . . .
8.000 3.4520 6.58 .Q V . . . .
8.083 3.4975 6.62 .Q V . . . .
8.167 3.5434 6.66 .Q V . . . .
8.250 3.5895 6.70 .Q V . . . .
8.333 3.6359 6.74 .Q V . . . .
8.417 3.6826 6.78 .Q V . . . .
8.500 3.7295 6.82 .Q V . . . .
8.583 3.7768 6.86 .Q V . . . .
8.667 3.8244 6.91 .Q V . . . .
8.750 3.8723 6.95 .Q V . . . .
8.833 3.9205 7.00 .Q V . . . .
8.917 3.9690 7.04 .Q V . . . .
9.000 4.0178 7.09 .Q V . . . .
9.083 4.0670 7.14 .Q V . . . .
9.167 4.1165 7.19 .Q V . . . .
9.250 4.1663 7.24 .Q V . . . .
9.333 4.2165 7.29 .Q V . . . .
9.417 4.2671 7.34 .Q V . . . .
9.500 4.3180 7.39 .Q V . . . .
9.583 4.3693 7.45 .Q V . . . .
9.667 4.4210 7.50 .Q V . . . .
9.750 4.4730 7.56 .Q V . . . .
9.833 4.5255 7.62 .Q V . . . .
9.917 4.5783 7.67 .Q V . . . .
10.000 4.6316 7.73 .Q V . . . .
10.083 4.6852 7.79 .Q V . . . .
10.167 4.7393 7.86 .Q V . . . .
10.250 4.7939 7.92 .Q V. . . .
10.333 4.8489 7.98 .Q V. . . .
10.417 4.9043 8.05 .Q V. . . .
10.500 4.9602 8.12 .Q V. . . .
10.583 5.0166 8.19 .Q V. . . .
10.667 5.0735 8.26 .Q V. . . .
10.750 5.1309 8.33 .Q V. . . .
10.833 5.1888 8.41 .Q V. . . .
10.917 5.2472 8.48 .Q V. . . .
11.000 5.3062 8.56 .Q V. . . .
11.083 5.3657 8.64 .Q V . . .
11.167 5.4258 8.72 .Q V . . .
11.250 5.4864 8.81 .Q V . . .
11.333 5.5477 8.90 .Q V . . .
11.417 5.6096 8.98 .Q V . . .
11.500 5.6721 9.08 .Q V . . .
11.583 5.7352 9.17 .Q V . . .
11.667 5.7990 9.27 .Q V . . .
11.750 5.8635 9.37 .Q .V . . .
11.833 5.9288 9.47 .Q .V . . .
11.917 5.9947 9.58 .Q .V . . .
12.000 6.0614 9.69 .Q .V . . .
12.083 6.1294 9.87 .Q .V . . .
12.167 6.2008 10.37 . Q .V . . .
12.250 6.2758 10.89 . Q .V . . .
12.333 6.3526 11.16 . Q .V . . .
12.417 6.4309 11.37 . Q . V . . .
12.500 6.5105 11.56 . Q . V . . .
12.583 6.5913 11.72 . Q . V . . .
12.667 6.6731 11.88 . Q . V . . .
12.750 6.7560 12.03 . Q . V . . .
12.833 6.8400 12.19 . Q . V . . .
12.917 6.9251 12.36 . Q . V . . .
13.000 7.0114 12.53 . Q . V . . .
13.083 7.0989 12.71 . Q . V . . .
13.167 7.1878 12.90 . Q . V . . .
13.250 7.2779 13.09 . Q . V . . .
13.333 7.3694 13.29 . Q . V . . .
13.417 7.4623 13.49 . Q . V . . .
13.500 7.5567 13.71 . Q . V . . .
13.583 7.6527 13.94 . Q . V . . .
13.667 7.7504 14.18 . Q . V . . .
13.750 7.8497 14.43 . Q . V . . .
13.833 7.9509 14.69 . Q . V . . .
13.917 8.0540 14.97 . Q . V . . .
14.000 8.1592 15.27 . Q . V . . .
14.083 8.2666 15.60 . Q . V . . .
14.167 8.3773 16.08 . Q . V . . .
14.250 8.4914 16.57 . Q . V . . .
14.333 8.6085 17.00 . Q . V . . .
14.417 8.7285 17.43 . Q . V . . .
14.500 8.8517 17.88 . Q . V . . .
14.583 8.9781 18.35 . Q . V . . .
14.667 9.1080 18.86 . Q . V . . .
14.750 9.2416 19.40 . Q . V . . .
14.833 9.3794 20.00 . Q . V . . .
14.917 9.5216 20.65 . Q . V . . .
15.000 9.6688 21.37 . Q . V . . .
15.083 9.8214 22.16 . Q . V . . .
15.167 9.9803 23.06 . Q . V . . .
15.250 10.1459 24.05 . Q . V. . .
15.333 10.3195 25.21 . Q . V. . .
15.417 10.5039 26.77 . Q . V. . .
15.500 10.7091 29.79 . Q . V . .
15.583 10.9370 33.09 . Q . V . .
15.667 11.1843 35.91 . Q . .V . .
15.750 11.4526 38.95 . Q . .V . .
15.833 11.7463 42.65 . Q . . V . .
15.917 12.0748 47.70 . Q. . V . .
16.000 12.4661 56.82 . .Q . V . .
16.083 12.9889 75.91 . . Q . V . .
16.167 13.7599 111.96 . . . Q V . .
16.250 14.4921 106.31 . . .Q V . .
16.333 14.9832 71.32 . . Q . V . .
16.417 15.3692 56.04 . .Q . V . .
16.500 15.6761 44.57 . Q . . V. .
16.583 15.9212 35.59 . Q . . V. .
16.667 16.1242 29.47 . Q . . V .
16.750 16.3026 25.91 . Q . . V .
16.833 16.4658 23.69 . Q . . V .
16.917 16.6173 21.99 . Q . . .V .
17.000 16.7593 20.62 . Q . . .V .
17.083 16.8927 19.38 . Q . . .V .
17.167 17.0167 18.00 . Q . . .V .
17.250 17.1319 16.73 . Q . . . V .
17.333 17.2414 15.90 . Q . . . V .
17.417 17.3460 15.20 . Q . . . V .
17.500 17.4465 14.59 . Q . . . V .
17.583 17.5434 14.07 . Q . . . V .
17.667 17.6371 13.60 . Q . . . V .
17.750 17.7279 13.18 . Q . . . V .
17.833 17.8160 12.80 . Q . . . V .
17.917 17.9017 12.44 . Q . . . V .
18.000 17.9851 12.11 . Q . . . V .
18.083 18.0660 11.74 . Q . . . V .
18.167 18.1422 11.07 . Q . . . V .
18.250 18.2140 10.42 . Q . . . V .
18.333 18.2830 10.03 . Q . . . V .
18.417 18.3500 9.72 .Q . . . V .
18.500 18.4151 9.46 .Q . . . V .
18.583 18.4787 9.23 .Q . . . V .
18.667 18.5409 9.03 .Q . . . V .
18.750 18.6019 8.85 .Q . . . V .
18.833 18.6616 8.68 .Q . . . V .
18.917 18.7203 8.52 .Q . . . V .
19.000 18.7779 8.36 .Q . . . V .
19.083 18.8344 8.21 .Q . . . V .
19.167 18.8900 8.07 .Q . . . V .
19.250 18.9446 7.94 .Q . . . V .
19.333 18.9984 7.81 .Q . . . V .
19.417 19.0514 7.69 .Q . . . V .
19.500 19.1035 7.57 .Q . . . V .
19.583 19.1549 7.46 .Q . . . V .
19.667 19.2056 7.35 .Q . . . V .
19.750 19.2555 7.25 .Q . . . V .
19.833 19.3048 7.15 .Q . . . V .
19.917 19.3534 7.06 .Q . . . V .
20.000 19.4013 6.96 .Q . . . V .
20.083 19.4487 6.88 .Q . . . V .
20.167 19.4955 6.79 .Q . . . V .
20.250 19.5416 6.71 .Q . . . V .
20.333 19.5873 6.63 .Q . . . V .
20.417 19.6324 6.55 .Q . . . V .
20.500 19.6769 6.47 .Q . . . V .
20.583 19.7210 6.40 .Q . . . V .
20.667 19.7646 6.33 .Q . . . V .
20.750 19.8077 6.26 .Q . . . V .
20.833 19.8503 6.19 .Q . . . V .
20.917 19.8925 6.13 .Q . . . V .
21.000 19.9343 6.06 .Q . . . V .
21.083 19.9756 6.00 .Q . . . V .
21.167 20.0166 5.94 .Q . . . V .
21.250 20.0571 5.89 .Q . . . V .
21.333 20.0972 5.83 .Q . . . V .
21.417 20.1370 5.77 .Q . . . V .
21.500 20.1764 5.72 .Q . . . V .
21.583 20.2154 5.67 .Q . . . V .
21.667 20.2541 5.62 .Q . . . V .
21.750 20.2924 5.57 .Q . . . V .
21.833 20.3304 5.52 .Q . . . V .
21.917 20.3681 5.47 .Q . . . V .
22.000 20.4055 5.42 .Q . . . V .
22.083 20.4425 5.38 .Q . . . V .
22.167 20.4792 5.33 .Q . . . V .
22.250 20.5157 5.29 .Q . . . V .
22.333 20.5518 5.25 .Q . . . V .
22.417 20.5877 5.21 .Q . . . V .
22.500 20.6232 5.17 .Q . . . V .
22.583 20.6585 5.13 .Q . . . V .
22.667 20.6936 5.09 .Q . . . V .
22.750 20.7283 5.05 .Q . . . V .
22.833 20.7628 5.01 .Q . . . V.
22.917 20.7971 4.97 Q . . . V.
23.000 20.8311 4.94 Q . . . V.
23.083 20.8649 4.90 Q . . . V.
23.167 20.8984 4.87 Q . . . V.
23.250 20.9317 4.83 Q . . . V.
23.333 20.9648 4.80 Q . . . V.
23.417 20.9976 4.77 Q . . . V.
23.500 21.0302 4.74 Q . . . V.
23.583 21.0626 4.70 Q . . . V.
23.667 21.0948 4.67 Q . . . V.
23.750 21.1268 4.64 Q . . . V.
23.833 21.1586 4.61 Q . . . V.
23.917 21.1901 4.58 Q . . . V.
24.000 21.2215 4.56 Q . . . V.
24.083 21.2509 4.27 Q . . . V.
24.167 21.2701 2.79 Q . . . V.
24.250 21.2789 1.28 Q . . . V.
24.333 21.2839 0.72 Q . . . V.
24.417 21.2867 0.41 Q . . . V.
24.500 21.2882 0.22 Q . . . V.
24.583 21.2890 0.11 Q . . . V.
24.667 21.2895 0.08 Q . . . V.
24.750 21.2900 0.07 Q . . . V.
24.833 21.2903 0.05 Q . . . V.
24.917 21.2906 0.04 Q . . . V.
25.000 21.2907 0.02 Q . . . V.
25.083 21.2908 0.01 Q . . . V
----------------------------------------------------------------------------- ---
TIME DURATION(minutes) OF PERCENTILES OF ESTIMATED PEAK FLOW RATE:
(Note: 100% of Peak Flow Rate estimate assumed to have
an instantaneous time duration)
Percentile of Estimated Duration
Peak Flow Rate (minutes)
======================= =========
0% 1505.0
10% 345.0
20% 105.0
30% 60.0
40% 35.0
50% 30.0
60% 20.0
70% 10.0
80% 10.0
90% 10.0
============================================================================ END OF FLOODSCx ROUTING ANALYSIS
____________________________________________________________________________ ****************************************************************************
F L O O D R O U T I N G A N A L Y S I S
USING COUNTY HYDROLOGY MANUAL OF SAN BERNARDINO(1986)
(c) Copyright 1989-2015 Advanced Engineering Software (aes) Ver. 22.0 Release Date: 07/01/2015 License ID 1673
Analysis prepared by:
************************** DESCRIPTION OF STUDY ************************** * VANBUREN 100 YEAR *
* ZSNYDER 3/20/2019 *
* *
************************************************************************** FILE NAME: VANBUREN.DAT
TIME/DATE OF STUDY: 14:45 03/20/2019
**************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>SUBAREA RUNOFF (UNIT-HYDROGRAPH ANALYSIS)<<<<<
============================================================================ (UNIT-HYDROGRAPH ADDED TO STREAM #1)
WATERCOURSE LENGTH = 2615.000 FEET
LENGTH FROM CONCENTRATION POINT TO CENTROID = 1211.000 FEET ELEVATION VARIATION ALONG WATERCOURSE = 922.000 FEET
BASIN FACTOR = 0.050
WATERSHED AREA = 49.400 ACRES
BASEFLOW = 0.000 CFS/SQUARE-MILE
WATERCOURSE "LAG" TIME = 0.126 HOURS
CAUTION: LAG TIME IS LESS THAN 0.50 HOURS.
THE 5-MINUTE PERIOD UH MODEL (USED IN THIS COMPUTER PROGRAM) MAY BE TOO LARGE FOR PEAK FLOW ESTIMATES.
FOOTHILL S-GRAPH SELECTED
MAXIMUM WATERSHED LOSS RATE(INCH/HOUR) = 0.010
LOW LOSS FRACTION = 0.010
OFFSITE Van Buren Watershed UH Calculations Page 260 of 847 *HYDROGRAPH MODEL #1 SPECIFIED*
SPECIFIED PEAK 5-MINUTES RAINFALL(INCH)= 0.29
SPECIFIED PEAK 30-MINUTES RAINFALL(INCH)= 0.76
SPECIFIED PEAK 1-HOUR RAINFALL(INCH) = 1.12
SPECIFIED PEAK 3-HOUR RAINFALL(INCH) = 1.89
SPECIFIED PEAK 6-HOUR RAINFALL(INCH) = 2.61
SPECIFIED PEAK 24-HOUR RAINFALL(INCH) = 4.65
PRECIPITATION DEPTH-AREA REDUCTION FACTORS:
5-MINUTE FACTOR = 0.998
30-MINUTE FACTOR = 0.998
1-HOUR FACTOR = 0.998
3-HOUR FACTOR = 1.000
6-HOUR FACTOR = 1.000
24-HOUR FACTOR = 1.000
UNIT HYDROGRAPH TIME UNIT = 5.000 MINUTES
UNIT INTERVAL PERCENTAGE OF LAG-TIME = 66.357
============================================================================
UNIT HYDROGRAPH DETERMINATION
---------------------------------------------------------------------------- INTERVAL "S" GRAPH UNIT HYDROGRAPH
NUMBER MEAN VALUES ORDINATES(CFS)
---------------------------------------------------------------------------- 1 6.575 39.279
2 44.501 226.583
3 75.135 183.020
4 86.605 68.521
5 92.973 38.046
6 96.504 21.096
7 98.081 9.425
8 98.454 2.223
9 98.797 2.051
10 99.140 2.050
11 99.483 2.050
12 99.826 2.050
13 100.000 1.037
****************************************************************************
UNIT UNIT UNIT EFFECTIVE
PERIOD RAINFALL SOIL-LOSS RAINFALL
(NUMBER) (INCHES) (INCHES) (INCHES)
---------------------------------------------------------------------------- 1 0.0067 0.0001 0.0067
2 0.0067 0.0001 0.0067
3 0.0068 0.0001 0.0067
4 0.0068 0.0001 0.0067
5 0.0068 0.0001 0.0067
6 0.0068 0.0001 0.0068
7 0.0069 0.0001 0.0068
8 0.0069 0.0001 0.0068
9 0.0069 0.0001 0.0068
10 0.0069 0.0001 0.0068
11 0.0069 0.0001 0.0069
12 0.0070 0.0001 0.0069
13 0.0070 0.0001 0.0069
14 0.0070 0.0001 0.0069
15 0.0070 0.0001 0.0070
16 0.0071 0.0001 0.0070
17 0.0071 0.0001 0.0070
18 0.0071 0.0001 0.0070
19 0.0071 0.0001 0.0071
20 0.0071 0.0001 0.0071
21 0.0072 0.0001 0.0071
22 0.0072 0.0001 0.0071
23 0.0072 0.0001 0.0072
24 0.0072 0.0001 0.0072
25 0.0073 0.0001 0.0072
26 0.0073 0.0001 0.0072
27 0.0073 0.0001 0.0073
28 0.0073 0.0001 0.0073
29 0.0074 0.0001 0.0073
30 0.0074 0.0001 0.0073
31 0.0074 0.0001 0.0074
32 0.0075 0.0001 0.0074
33 0.0075 0.0001 0.0074
34 0.0075 0.0001 0.0074
35 0.0075 0.0001 0.0075
36 0.0076 0.0001 0.0075
37 0.0076 0.0001 0.0075
38 0.0076 0.0001 0.0075
39 0.0077 0.0001 0.0076
40 0.0077 0.0001 0.0076
41 0.0077 0.0001 0.0076
42 0.0077 0.0001 0.0077
43 0.0078 0.0001 0.0077
44 0.0078 0.0001 0.0077
45 0.0078 0.0001 0.0078
46 0.0079 0.0001 0.0078
47 0.0079 0.0001 0.0078
48 0.0079 0.0001 0.0078
49 0.0080 0.0001 0.0079
50 0.0080 0.0001 0.0079
51 0.0080 0.0001 0.0080
52 0.0081 0.0001 0.0080
53 0.0081 0.0001 0.0080
54 0.0081 0.0001 0.0080
55 0.0082 0.0001 0.0081
56 0.0082 0.0001 0.0081
57 0.0082 0.0001 0.0082
58 0.0083 0.0001 0.0082
59 0.0083 0.0001 0.0082
60 0.0083 0.0001 0.0082
61 0.0084 0.0001 0.0083
62 0.0084 0.0001 0.0083
63 0.0085 0.0001 0.0084
64 0.0085 0.0001 0.0084
65 0.0085 0.0001 0.0084
66 0.0086 0.0001 0.0085
67 0.0086 0.0001 0.0085
68 0.0086 0.0001 0.0086
69 0.0087 0.0001 0.0086
70 0.0087 0.0001 0.0086
71 0.0088 0.0001 0.0087
72 0.0088 0.0001 0.0087
73 0.0089 0.0001 0.0088
74 0.0089 0.0001 0.0088
75 0.0090 0.0001 0.0089
76 0.0090 0.0001 0.0089
77 0.0090 0.0001 0.0089
78 0.0091 0.0001 0.0090
79 0.0091 0.0001 0.0090
80 0.0092 0.0001 0.0091
81 0.0092 0.0001 0.0091
82 0.0093 0.0001 0.0092
83 0.0093 0.0001 0.0092
84 0.0094 0.0001 0.0093
85 0.0094 0.0001 0.0093
86 0.0095 0.0001 0.0094
87 0.0095 0.0001 0.0094
88 0.0096 0.0001 0.0095
89 0.0096 0.0001 0.0095
90 0.0097 0.0001 0.0096
91 0.0097 0.0001 0.0096
92 0.0098 0.0001 0.0097
93 0.0099 0.0001 0.0098
94 0.0099 0.0001 0.0098
95 0.0100 0.0001 0.0099
96 0.0100 0.0001 0.0099
97 0.0101 0.0001 0.0100
98 0.0101 0.0001 0.0100
99 0.0102 0.0001 0.0101
100 0.0103 0.0001 0.0102
101 0.0104 0.0001 0.0103
102 0.0104 0.0001 0.0103
103 0.0105 0.0001 0.0104
104 0.0105 0.0001 0.0104
105 0.0106 0.0001 0.0105
106 0.0107 0.0001 0.0106
107 0.0108 0.0001 0.0107
108 0.0108 0.0001 0.0107
109 0.0109 0.0001 0.0108
110 0.0110 0.0001 0.0109
111 0.0111 0.0001 0.0110
112 0.0111 0.0001 0.0110
113 0.0112 0.0001 0.0111
114 0.0113 0.0001 0.0112
115 0.0114 0.0001 0.0113
116 0.0115 0.0001 0.0113
117 0.0116 0.0001 0.0115
118 0.0116 0.0001 0.0115
119 0.0118 0.0001 0.0116
120 0.0118 0.0001 0.0117
121 0.0120 0.0001 0.0118
122 0.0120 0.0001 0.0119
123 0.0122 0.0001 0.0120
124 0.0122 0.0001 0.0121
125 0.0124 0.0001 0.0122
126 0.0124 0.0001 0.0123
127 0.0126 0.0001 0.0125
128 0.0127 0.0001 0.0125
129 0.0128 0.0001 0.0127
130 0.0129 0.0001 0.0128
131 0.0130 0.0001 0.0129
132 0.0131 0.0001 0.0130
133 0.0133 0.0001 0.0132
134 0.0134 0.0001 0.0133
135 0.0136 0.0001 0.0134
136 0.0137 0.0001 0.0135
137 0.0139 0.0001 0.0137
138 0.0139 0.0001 0.0138
139 0.0141 0.0001 0.0140
140 0.0143 0.0001 0.0141
141 0.0145 0.0001 0.0143
142 0.0146 0.0001 0.0144
143 0.0148 0.0001 0.0147
144 0.0149 0.0001 0.0148
145 0.0169 0.0002 0.0168
146 0.0171 0.0002 0.0169
147 0.0173 0.0002 0.0172
148 0.0175 0.0002 0.0173
149 0.0178 0.0002 0.0176
150 0.0179 0.0002 0.0177
151 0.0182 0.0002 0.0180
152 0.0184 0.0002 0.0182
153 0.0187 0.0002 0.0185
154 0.0189 0.0002 0.0187
155 0.0192 0.0002 0.0190
156 0.0194 0.0002 0.0192
157 0.0198 0.0002 0.0196
158 0.0200 0.0002 0.0198
159 0.0204 0.0002 0.0202
160 0.0206 0.0002 0.0204
161 0.0211 0.0002 0.0209
162 0.0213 0.0002 0.0211
163 0.0218 0.0002 0.0216
164 0.0221 0.0002 0.0219
165 0.0227 0.0002 0.0224
166 0.0230 0.0002 0.0227
167 0.0236 0.0002 0.0234
168 0.0239 0.0002 0.0237
169 0.0253 0.0003 0.0250
170 0.0257 0.0003 0.0254
171 0.0265 0.0003 0.0262
172 0.0269 0.0003 0.0266
173 0.0278 0.0003 0.0276
174 0.0283 0.0003 0.0281
175 0.0294 0.0003 0.0291
176 0.0300 0.0003 0.0297
177 0.0313 0.0003 0.0310
178 0.0321 0.0003 0.0317
179 0.0337 0.0003 0.0333
180 0.0346 0.0003 0.0342
181 0.0366 0.0004 0.0362
182 0.0377 0.0004 0.0373
183 0.0403 0.0004 0.0399
184 0.0419 0.0004 0.0414
185 0.0522 0.0005 0.0517
186 0.0544 0.0005 0.0539
187 0.0598 0.0006 0.0592
188 0.0634 0.0006 0.0627
189 0.0715 0.0007 0.0708
190 0.0785 0.0008 0.0777
191 0.1031 0.0008 0.1023
192 0.1318 0.0008 0.1309
193 0.2904 0.0008 0.2895
194 0.0881 0.0008 0.0873
195 0.0675 0.0007 0.0668
196 0.0569 0.0006 0.0563
197 0.0436 0.0004 0.0431
198 0.0390 0.0004 0.0386
199 0.0355 0.0004 0.0352
200 0.0328 0.0003 0.0325
201 0.0307 0.0003 0.0304
202 0.0289 0.0003 0.0286
203 0.0274 0.0003 0.0271
204 0.0260 0.0003 0.0258
205 0.0243 0.0002 0.0240
206 0.0233 0.0002 0.0230
207 0.0224 0.0002 0.0222
208 0.0216 0.0002 0.0214
209 0.0209 0.0002 0.0206
210 0.0202 0.0002 0.0200
211 0.0196 0.0002 0.0194
212 0.0190 0.0002 0.0189
213 0.0185 0.0002 0.0183
214 0.0181 0.0002 0.0179
215 0.0176 0.0002 0.0174
216 0.0172 0.0002 0.0170
217 0.0150 0.0002 0.0149
218 0.0147 0.0001 0.0145
219 0.0144 0.0001 0.0142
220 0.0140 0.0001 0.0139
221 0.0138 0.0001 0.0136
222 0.0135 0.0001 0.0133
223 0.0132 0.0001 0.0131
224 0.0130 0.0001 0.0128
225 0.0127 0.0001 0.0126
226 0.0125 0.0001 0.0124
227 0.0123 0.0001 0.0122
228 0.0121 0.0001 0.0120
229 0.0119 0.0001 0.0118
230 0.0117 0.0001 0.0116
231 0.0115 0.0001 0.0114
232 0.0113 0.0001 0.0112
233 0.0112 0.0001 0.0111
234 0.0110 0.0001 0.0109
235 0.0109 0.0001 0.0108
236 0.0107 0.0001 0.0106
237 0.0106 0.0001 0.0105
238 0.0104 0.0001 0.0103
239 0.0103 0.0001 0.0102
240 0.0102 0.0001 0.0101
241 0.0101 0.0001 0.0100
242 0.0099 0.0001 0.0098
243 0.0098 0.0001 0.0097
244 0.0097 0.0001 0.0096
245 0.0096 0.0001 0.0095
246 0.0095 0.0001 0.0094
247 0.0094 0.0001 0.0093
248 0.0093 0.0001 0.0092
249 0.0092 0.0001 0.0091
250 0.0091 0.0001 0.0090
251 0.0090 0.0001 0.0089
252 0.0089 0.0001 0.0088
253 0.0088 0.0001 0.0087
254 0.0087 0.0001 0.0087
255 0.0087 0.0001 0.0086
256 0.0086 0.0001 0.0085
257 0.0085 0.0001 0.0084
258 0.0084 0.0001 0.0083
259 0.0084 0.0001 0.0083
260 0.0083 0.0001 0.0082
261 0.0082 0.0001 0.0081
262 0.0081 0.0001 0.0081
263 0.0081 0.0001 0.0080
264 0.0080 0.0001 0.0079
265 0.0079 0.0001 0.0079
266 0.0079 0.0001 0.0078
267 0.0078 0.0001 0.0077
268 0.0078 0.0001 0.0077
269 0.0077 0.0001 0.0076
270 0.0076 0.0001 0.0076
271 0.0076 0.0001 0.0075
272 0.0075 0.0001 0.0075
273 0.0075 0.0001 0.0074
274 0.0074 0.0001 0.0073
275 0.0074 0.0001 0.0073
276 0.0073 0.0001 0.0072
277 0.0073 0.0001 0.0072
278 0.0072 0.0001 0.0071
279 0.0072 0.0001 0.0071
280 0.0071 0.0001 0.0070
281 0.0071 0.0001 0.0070
282 0.0070 0.0001 0.0070
283 0.0070 0.0001 0.0069
284 0.0069 0.0001 0.0069
285 0.0069 0.0001 0.0068
286 0.0068 0.0001 0.0068
287 0.0068 0.0001 0.0067
288 0.0068 0.0001 0.0067
TOTAL STORM RAINFALL(INCHES) = 4.65
TOTAL SOIL-LOSS(INCHES) = 0.04
TOTAL EFFECTIVE RAINFALL(INCHES) = 4.61
---------------------------------------------------------------------------- TOTAL SOIL-LOSS VOLUME(ACRE-FEET) = 0.1799
TOTAL STORM RUNOFF VOLUME(ACRE-FEET) = 18.9509
----------------------------------------------------------------------------
============================================================================ 2 4 - 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 FIVE-MINUTE UNIT INTERVALS(CFS)
(Note: Time indicated is at END of Each Unit Intervals) ---------------------------------------------------------------------------- TIME(HRS) VOLUME(AF) Q(CFS) 0. 50.0 100.0 150.0 200.0
----------------------------------------------------------------------------
0.083 0.0018 0.26 Q . . . .
0.167 0.0140 1.77 Q . . . .
0.250 0.0347 3.00 Q . . . .
0.333 0.0585 3.46 Q . . . .
0.417 0.0842 3.73 Q . . . .
0.500 0.1109 3.88 Q . . . .
0.583 0.1381 3.95 Q . . . .
0.667 0.1655 3.98 Q . . . .
0.750 0.1931 4.01 Q . . . .
0.833 0.2209 4.03 Q . . . .
0.917 0.2489 4.06 Q . . . .
1.000 0.2770 4.09 Q . . . .
1.083 0.3053 4.11 Q . . . .
1.167 0.3336 4.12 Q . . . .
1.250 0.3621 4.13 Q . . . .
1.333 0.3907 4.15 Q . . . .
1.417 0.4193 4.16 Q . . . .
1.500 0.4481 4.17 Q . . . .
1.583 0.4769 4.19 QV . . . .
1.667 0.5058 4.20 QV . . . .
1.750 0.5349 4.22 QV . . . .
1.833 0.5640 4.23 QV . . . .
1.917 0.5932 4.24 QV . . . .
2.000 0.6226 4.26 QV . . . .
2.083 0.6520 4.27 QV . . . .
2.167 0.6815 4.29 QV . . . .
2.250 0.7111 4.30 QV . . . .
2.333 0.7409 4.32 QV . . . .
2.417 0.7707 4.33 QV . . . .
2.500 0.8007 4.35 QV . . . .
2.583 0.8307 4.36 QV . . . .
2.667 0.8609 4.38 QV . . . .
2.750 0.8912 4.39 QV . . . .
2.833 0.9215 4.41 QV . . . .
2.917 0.9520 4.43 Q V . . . .
3.000 0.9826 4.44 Q V . . . .
3.083 1.0133 4.46 Q V . . . .
3.167 1.0442 4.48 Q V . . . .
3.250 1.0751 4.49 Q V . . . .
3.333 1.1062 4.51 Q V . . . .
3.417 1.1373 4.53 Q V . . . .
3.500 1.1686 4.54 Q V . . . .
3.583 1.2001 4.56 Q V . . . .
3.667 1.2316 4.58 Q V . . . .
3.750 1.2633 4.60 Q V . . . .
3.833 1.2950 4.62 Q V . . . .
3.917 1.3270 4.63 Q V . . . .
4.000 1.3590 4.65 Q V . . . .
4.083 1.3912 4.67 Q V . . . .
4.167 1.4234 4.69 Q V . . . .
4.250 1.4559 4.71 Q V . . . .
4.333 1.4884 4.73 Q V . . . .
4.417 1.5211 4.75 Q V . . . .
4.500 1.5539 4.77 Q V . . . .
4.583 1.5869 4.79 Q V . . . .
4.667 1.6200 4.81 Q V . . . .
4.750 1.6532 4.83 Q V . . . .
4.833 1.6866 4.85 Q V . . . .
4.917 1.7202 4.87 Q V . . . .
5.000 1.7538 4.89 Q V . . . .
5.083 1.7876 4.91 Q V . . . .
5.167 1.8216 4.93 Q V . . . .
5.250 1.8557 4.95 Q V . . . .
5.333 1.8900 4.98 Q V . . . .
5.417 1.9244 5.00 Q V . . . .
5.500 1.9590 5.02 .Q V . . . .
5.583 1.9937 5.04 .Q V . . . .
5.667 2.0286 5.07 .Q V . . . .
5.750 2.0637 5.09 .Q V . . . .
5.833 2.0989 5.11 .Q V . . . .
5.917 2.1343 5.14 .Q V . . . .
6.000 2.1698 5.16 .Q V . . . .
6.083 2.2055 5.19 .Q V . . . .
6.167 2.2414 5.21 .Q V . . . .
6.250 2.2775 5.24 .Q V . . . .
6.333 2.3137 5.26 .Q V . . . .
6.417 2.3502 5.29 .Q V . . . .
6.500 2.3868 5.32 .Q V . . . .
6.583 2.4236 5.34 .Q V . . . .
6.667 2.4605 5.37 .Q V . . . .
6.750 2.4977 5.40 .Q V . . . .
6.833 2.5351 5.42 .Q V . . . .
6.917 2.5726 5.45 .Q V . . . .
7.000 2.6104 5.48 .Q V . . . .
7.083 2.6483 5.51 .Q V . . . .
7.167 2.6864 5.54 .Q V . . . .
7.250 2.7248 5.57 .Q V . . . .
7.333 2.7634 5.60 .Q V . . . .
7.417 2.8021 5.63 .Q V . . . .
7.500 2.8411 5.66 .Q V . . . .
7.583 2.8804 5.69 .Q V . . . .
7.667 2.9198 5.73 .Q V . . . .
7.750 2.9594 5.76 .Q V . . . .
7.833 2.9993 5.79 .Q V . . . .
7.917 3.0395 5.83 .Q V . . . .
8.000 3.0798 5.86 .Q V . . . .
8.083 3.1204 5.89 .Q V . . . .
8.167 3.1613 5.93 .Q V . . . .
8.250 3.2023 5.97 .Q V . . . .
8.333 3.2437 6.00 .Q V . . . .
8.417 3.2853 6.04 .Q V . . . .
8.500 3.3271 6.08 .Q V . . . .
8.583 3.3693 6.12 .Q V . . . .
8.667 3.4117 6.16 .Q V . . . .
8.750 3.4543 6.20 .Q V . . . .
8.833 3.4973 6.24 .Q V . . . .
8.917 3.5405 6.28 .Q V . . . .
9.000 3.5840 6.32 .Q V . . . .
9.083 3.6279 6.36 .Q V . . . .
9.167 3.6720 6.41 .Q V . . . .
9.250 3.7164 6.45 .Q V . . . .
9.333 3.7611 6.50 .Q V . . . .
9.417 3.8062 6.54 .Q V . . . .
9.500 3.8516 6.59 .Q V . . . .
9.583 3.8973 6.64 .Q V . . . .
9.667 3.9433 6.69 .Q V . . . .
9.750 3.9897 6.74 .Q V . . . .
9.833 4.0365 6.79 .Q V . . . .
9.917 4.0836 6.84 .Q V . . . .
10.000 4.1310 6.89 .Q V . . . .
10.083 4.1789 6.95 .Q V . . . .
10.167 4.2271 7.00 .Q V . . . .
10.250 4.2757 7.06 .Q V. . . .
10.333 4.3247 7.12 .Q V. . . .
10.417 4.3742 7.18 .Q V. . . .
10.500 4.4240 7.24 .Q V. . . .
10.583 4.4743 7.30 .Q V. . . .
10.667 4.5250 7.36 .Q V. . . .
10.750 4.5761 7.43 .Q V. . . .
10.833 4.6278 7.50 .Q V. . . .
10.917 4.6798 7.56 .Q V. . . .
11.000 4.7324 7.63 .Q V. . . .
11.083 4.7855 7.70 .Q V . . .
11.167 4.8390 7.78 .Q V . . .
11.250 4.8931 7.85 .Q V . . .
11.333 4.9477 7.93 .Q V . . .
11.417 5.0029 8.01 .Q V . . .
11.500 5.0586 8.09 .Q V . . .
11.583 5.1150 8.18 .Q V . . .
11.667 5.1719 8.27 .Q V . . .
11.750 5.2294 8.35 .Q .V . . .
11.833 5.2876 8.45 .Q .V . . .
11.917 5.3464 8.54 .Q .V . . .
12.000 5.4059 8.64 .Q .V . . .
12.083 5.4665 8.81 .Q .V . . .
12.167 5.5307 9.31 .Q .V . . .
12.250 5.5978 9.74 .Q .V . . .
12.333 5.6665 9.98 .Q .V . . .
12.417 5.7365 10.16 . Q . V . . .
12.500 5.8076 10.32 . Q . V . . .
12.583 5.8797 10.46 . Q . V . . .
12.667 5.9527 10.60 . Q . V . . .
12.750 6.0266 10.73 . Q . V . . .
12.833 6.1015 10.88 . Q . V . . .
12.917 6.1775 11.03 . Q . V . . .
13.000 6.2545 11.19 . Q . V . . .
13.083 6.3326 11.34 . Q . V . . .
13.167 6.4119 11.51 . Q . V . . .
13.250 6.4923 11.67 . Q . V . . .
13.333 6.5740 11.86 . Q . V . . .
13.417 6.6569 12.04 . Q . V . . .
13.500 6.7412 12.24 . Q . V . . .
13.583 6.8268 12.44 . Q . V . . .
13.667 6.9140 12.66 . Q . V . . .
13.750 7.0027 12.88 . Q . V . . .
13.833 7.0931 13.12 . Q . V . . .
13.917 7.1851 13.37 . Q . V . . .
14.000 7.2791 13.64 . Q . V . . .
14.083 7.3750 13.93 . Q . V . . .
14.167 7.4741 14.38 . Q . V . . .
14.250 7.5761 14.81 . Q . V . . .
14.333 7.6807 15.20 . Q . V . . .
14.417 7.7880 15.57 . Q . V . . .
14.500 7.8981 15.99 . Q . V . . .
14.583 8.0110 16.40 . Q . V . . .
14.667 8.1272 16.87 . Q . V . . .
14.750 8.2466 17.34 . Q . V . . .
14.833 8.3699 17.90 . Q . V . . .
14.917 8.4971 18.47 . Q . V . . .
15.000 8.6289 19.14 . Q . V . . .
15.083 8.7655 19.83 . Q . V . . .
15.167 8.9078 20.67 . Q . V . . .
15.250 9.0562 21.55 . Q . V. . .
15.333 9.2120 22.62 . Q . V. . .
15.417 9.3776 24.04 . Q . V. . .
15.500 9.5636 27.01 . Q . V . .
15.583 9.7692 29.85 . Q . V . .
15.667 9.9925 32.44 . Q . .V . .
15.750 10.2345 35.13 . Q . .V . .
15.833 10.5001 38.57 . Q . . V . .
15.917 10.7975 43.18 . Q . . V . .
16.000 11.1556 52.00 . Q . V . .
16.083 11.6388 70.16 . . Q . V . .
16.167 12.3660 105.59 . . .Q V . .
16.250 12.9939 91.16 . . Q . V . .
16.333 13.4189 61.71 . . Q . V . .
16.417 13.7504 48.14 . Q. . V. .
16.500 14.0099 37.68 . Q . . V. .
16.583 14.2164 29.98 . Q . . V .
16.667 14.3895 25.12 . Q . . V .
16.750 14.5451 22.59 . Q . . V .
16.833 14.6880 20.75 . Q . . .V .
16.917 14.8208 19.29 . Q . . .V .
17.000 14.9452 18.06 . Q . . .V .
17.083 15.0608 16.78 . Q . . .V .
17.167 15.1679 15.55 . Q . . . V .
17.250 15.2689 14.67 . Q . . . V .
17.333 15.3651 13.98 . Q . . . V .
17.417 15.4573 13.39 . Q . . . V .
17.500 15.5460 12.88 . Q . . . V .
17.583 15.6316 12.43 . Q . . . V .
17.667 15.7144 12.02 . Q . . . V .
17.750 15.7947 11.66 . Q . . . V .
17.833 15.8726 11.32 . Q . . . V .
17.917 15.9485 11.01 . Q . . . V .
18.000 16.0223 10.72 . Q . . . V .
18.083 16.0939 10.39 . Q . . . V .
18.167 16.1610 9.74 .Q . . . V .
18.250 16.2243 9.19 .Q . . . V .
18.333 16.2853 8.86 .Q . . . V .
18.417 16.3444 8.59 .Q . . . V .
18.500 16.4021 8.37 .Q . . . V .
18.583 16.4584 8.18 .Q . . . V .
18.667 16.5135 8.01 .Q . . . V .
18.750 16.5676 7.85 .Q . . . V .
18.833 16.6206 7.69 .Q . . . V .
18.917 16.6726 7.55 .Q . . . V .
19.000 16.7236 7.41 .Q . . . V .
19.083 16.7738 7.28 .Q . . . V .
19.167 16.8231 7.16 .Q . . . V .
19.250 16.8716 7.04 .Q . . . V .
19.333 16.9193 6.93 .Q . . . V .
19.417 16.9663 6.82 .Q . . . V .
19.500 17.0126 6.72 .Q . . . V .
19.583 17.0582 6.62 .Q . . . V .
19.667 17.1032 6.53 .Q . . . V .
19.750 17.1475 6.44 .Q . . . V .
19.833 17.1912 6.35 .Q . . . V .
19.917 17.2344 6.26 .Q . . . V .
20.000 17.2770 6.18 .Q . . . V .
20.083 17.3190 6.10 .Q . . . V .
20.167 17.3605 6.03 .Q . . . V .
20.250 17.4016 5.96 .Q . . . V .
20.333 17.4421 5.88 .Q . . . V .
20.417 17.4821 5.82 .Q . . . V .
20.500 17.5217 5.75 .Q . . . V .
20.583 17.5609 5.68 .Q . . . V .
20.667 17.5996 5.62 .Q . . . V .
20.750 17.6379 5.56 .Q . . . V .
20.833 17.6757 5.50 .Q . . . V .
20.917 17.7132 5.44 .Q . . . V .
21.000 17.7503 5.39 .Q . . . V .
21.083 17.7871 5.33 .Q . . . V .
21.167 17.8234 5.28 .Q . . . V .
21.250 17.8594 5.23 .Q . . . V .
21.333 17.8951 5.18 .Q . . . V .
21.417 17.9304 5.13 .Q . . . V .
21.500 17.9654 5.08 .Q . . . V .
21.583 18.0001 5.04 .Q . . . V .
21.667 18.0345 4.99 Q . . . V .
21.750 18.0685 4.95 Q . . . V .
21.833 18.1023 4.90 Q . . . V .
21.917 18.1358 4.86 Q . . . V .
22.000 18.1690 4.82 Q . . . V .
22.083 18.2019 4.78 Q . . . V .
22.167 18.2345 4.74 Q . . . V .
22.250 18.2669 4.70 Q . . . V .
22.333 18.2990 4.66 Q . . . V .
22.417 18.3309 4.63 Q . . . V .
22.500 18.3625 4.59 Q . . . V .
22.583 18.3939 4.56 Q . . . V .
22.667 18.4250 4.52 Q . . . V .
22.750 18.4559 4.49 Q . . . V .
22.833 18.4866 4.45 Q . . . V.
22.917 18.5171 4.42 Q . . . V.
23.000 18.5473 4.39 Q . . . V.
23.083 18.5773 4.36 Q . . . V.
23.167 18.6071 4.33 Q . . . V.
23.250 18.6367 4.30 Q . . . V.
23.333 18.6661 4.27 Q . . . V.
23.417 18.6953 4.24 Q . . . V.
23.500 18.7243 4.21 Q . . . V.
23.583 18.7531 4.18 Q . . . V.
23.667 18.7817 4.16 Q . . . V.
23.750 18.8102 4.13 Q . . . V.
23.833 18.8384 4.10 Q . . . V.
23.917 18.8665 4.08 Q . . . V.
24.000 18.8944 4.05 Q . . . V.
24.083 18.9203 3.76 Q . . . V.
24.167 18.9357 2.23 Q . . . V.
24.250 18.9426 1.00 Q . . . V.
24.333 18.9463 0.54 Q . . . V.
24.417 18.9482 0.28 Q . . . V.
24.500 18.9492 0.14 Q . . . V.
24.583 18.9497 0.08 Q . . . V.
24.667 18.9502 0.06 Q . . . V.
24.750 18.9505 0.05 Q . . . V.
24.833 18.9507 0.03 Q . . . V.
24.917 18.9509 0.02 Q . . . V.
25.000 18.9509 0.01 Q . . . V
----------------------------------------------------------------------------- ---
TIME DURATION(minutes) OF PERCENTILES OF ESTIMATED PEAK FLOW RATE:
(Note: 100% of Peak Flow Rate estimate assumed to have
an instantaneous time duration)
Percentile of Estimated Duration
Peak Flow Rate (minutes)
======================= =========
0% 1500.0
10% 325.0
20% 95.0
30% 55.0
40% 35.0
50% 20.0
60% 15.0
70% 10.0
80% 10.0
90% 5.0
============================================================================ END OF FLOODSCx ROUTING ANALYSIS
____________________________________________________________________________ ****************************************************************************
F L O O D R O U T I N G A N A L Y S I S
USING COUNTY HYDROLOGY MANUAL OF SAN BERNARDINO(1986)
(c) Copyright 1989-2015 Advanced Engineering Software (aes) Ver. 22.0 Release Date: 07/01/2015 License ID 1673
Analysis prepared by:
************************** DESCRIPTION OF STUDY ************************** * WREN UH 100 YEAR *
* *
* *
************************************************************************** FILE NAME: WREN.DAT
TIME/DATE OF STUDY: 13:12 03/20/2019
**************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>SUBAREA RUNOFF (UNIT-HYDROGRAPH ANALYSIS)<<<<<
============================================================================ (UNIT-HYDROGRAPH ADDED TO STREAM #1)
WATERCOURSE LENGTH = 2278.000 FEET
LENGTH FROM CONCENTRATION POINT TO CENTROID = 1522.000 FEET ELEVATION VARIATION ALONG WATERCOURSE = 414.000 FEET
BASIN FACTOR = 0.050
WATERSHED AREA = 36.700 ACRES
BASEFLOW = 0.000 CFS/SQUARE-MILE
WATERCOURSE "LAG" TIME = 0.147 HOURS
CAUTION: LAG TIME IS LESS THAN 0.50 HOURS.
THE 5-MINUTE PERIOD UH MODEL (USED IN THIS COMPUTER PROGRAM) MAY BE TOO LARGE FOR PEAK FLOW ESTIMATES.
FOOTHILL S-GRAPH SELECTED
MAXIMUM WATERSHED LOSS RATE(INCH/HOUR) = 0.010
LOW LOSS FRACTION = 0.010
OFFSITE Wren Watershed UH Calculations Page 277 of 847
*HYDROGRAPH MODEL #1 SPECIFIED*
SPECIFIED PEAK 5-MINUTES RAINFALL(INCH)= 0.29
SPECIFIED PEAK 30-MINUTES RAINFALL(INCH)= 0.76
SPECIFIED PEAK 1-HOUR RAINFALL(INCH) = 1.12
SPECIFIED PEAK 3-HOUR RAINFALL(INCH) = 1.89
SPECIFIED PEAK 6-HOUR RAINFALL(INCH) = 2.61
SPECIFIED PEAK 24-HOUR RAINFALL(INCH) = 4.65
PRECIPITATION DEPTH-AREA REDUCTION FACTORS:
5-MINUTE FACTOR = 0.998
30-MINUTE FACTOR = 0.998
1-HOUR FACTOR = 0.998
3-HOUR FACTOR = 1.000
6-HOUR FACTOR = 1.000
24-HOUR FACTOR = 1.000
UNIT HYDROGRAPH TIME UNIT = 5.000 MINUTES
UNIT INTERVAL PERCENTAGE OF LAG-TIME = 56.526
============================================================================
UNIT HYDROGRAPH DETERMINATION
---------------------------------------------------------------------------- INTERVAL "S" GRAPH UNIT HYDROGRAPH
NUMBER MEAN VALUES ORDINATES(CFS)
---------------------------------------------------------------------------- 1 5.147 22.845
2 33.006 123.647
3 68.609 158.023
4 81.633 57.805
5 89.155 33.386
6 93.851 20.844
7 96.611 12.250
8 98.023 6.266
9 98.365 1.516
10 98.657 1.297
11 98.949 1.298
12 99.242 1.297
13 99.534 1.297
14 99.826 1.297
15 100.000 0.771
****************************************************************************
UNIT UNIT UNIT EFFECTIVE
PERIOD RAINFALL SOIL-LOSS RAINFALL
(NUMBER) (INCHES) (INCHES) (INCHES)
---------------------------------------------------------------------------- 1 0.0067 0.0001 0.0067
2 0.0067 0.0001 0.0067
3 0.0068 0.0001 0.0067
4 0.0068 0.0001 0.0067
5 0.0068 0.0001 0.0067
6 0.0068 0.0001 0.0068
7 0.0069 0.0001 0.0068
8 0.0069 0.0001 0.0068
9 0.0069 0.0001 0.0068
10 0.0069 0.0001 0.0068
11 0.0069 0.0001 0.0069
12 0.0070 0.0001 0.0069
13 0.0070 0.0001 0.0069
14 0.0070 0.0001 0.0069
15 0.0070 0.0001 0.0070
16 0.0071 0.0001 0.0070
17 0.0071 0.0001 0.0070
18 0.0071 0.0001 0.0070
19 0.0071 0.0001 0.0071
20 0.0071 0.0001 0.0071
21 0.0072 0.0001 0.0071
22 0.0072 0.0001 0.0071
23 0.0072 0.0001 0.0072
24 0.0072 0.0001 0.0072
25 0.0073 0.0001 0.0072
26 0.0073 0.0001 0.0072
27 0.0073 0.0001 0.0073
28 0.0073 0.0001 0.0073
29 0.0074 0.0001 0.0073
30 0.0074 0.0001 0.0073
31 0.0074 0.0001 0.0074
32 0.0075 0.0001 0.0074
33 0.0075 0.0001 0.0074
34 0.0075 0.0001 0.0074
35 0.0075 0.0001 0.0075
36 0.0076 0.0001 0.0075
37 0.0076 0.0001 0.0075
38 0.0076 0.0001 0.0075
39 0.0077 0.0001 0.0076
40 0.0077 0.0001 0.0076
41 0.0077 0.0001 0.0076
42 0.0077 0.0001 0.0077
43 0.0078 0.0001 0.0077
44 0.0078 0.0001 0.0077
45 0.0078 0.0001 0.0078
46 0.0079 0.0001 0.0078
47 0.0079 0.0001 0.0078
48 0.0079 0.0001 0.0078
49 0.0080 0.0001 0.0079
50 0.0080 0.0001 0.0079
51 0.0080 0.0001 0.0080
52 0.0081 0.0001 0.0080
53 0.0081 0.0001 0.0080
54 0.0081 0.0001 0.0080
55 0.0082 0.0001 0.0081
56 0.0082 0.0001 0.0081
57 0.0082 0.0001 0.0082
58 0.0083 0.0001 0.0082
59 0.0083 0.0001 0.0082
60 0.0083 0.0001 0.0082
61 0.0084 0.0001 0.0083
62 0.0084 0.0001 0.0083
63 0.0085 0.0001 0.0084
64 0.0085 0.0001 0.0084
65 0.0085 0.0001 0.0084
66 0.0086 0.0001 0.0085
67 0.0086 0.0001 0.0085
68 0.0086 0.0001 0.0086
69 0.0087 0.0001 0.0086
70 0.0087 0.0001 0.0086
71 0.0088 0.0001 0.0087
72 0.0088 0.0001 0.0087
73 0.0089 0.0001 0.0088
74 0.0089 0.0001 0.0088
75 0.0090 0.0001 0.0089
76 0.0090 0.0001 0.0089
77 0.0090 0.0001 0.0089
78 0.0091 0.0001 0.0090
79 0.0091 0.0001 0.0090
80 0.0092 0.0001 0.0091
81 0.0092 0.0001 0.0091
82 0.0093 0.0001 0.0092
83 0.0093 0.0001 0.0092
84 0.0094 0.0001 0.0093
85 0.0094 0.0001 0.0093
86 0.0095 0.0001 0.0094
87 0.0095 0.0001 0.0094
88 0.0096 0.0001 0.0095
89 0.0096 0.0001 0.0095
90 0.0097 0.0001 0.0096
91 0.0097 0.0001 0.0096
92 0.0098 0.0001 0.0097
93 0.0099 0.0001 0.0098
94 0.0099 0.0001 0.0098
95 0.0100 0.0001 0.0099
96 0.0100 0.0001 0.0099
97 0.0101 0.0001 0.0100
98 0.0101 0.0001 0.0100
99 0.0102 0.0001 0.0101
100 0.0103 0.0001 0.0102
101 0.0104 0.0001 0.0103
102 0.0104 0.0001 0.0103
103 0.0105 0.0001 0.0104
104 0.0105 0.0001 0.0104
105 0.0106 0.0001 0.0105
106 0.0107 0.0001 0.0106
107 0.0108 0.0001 0.0107
108 0.0108 0.0001 0.0107
109 0.0109 0.0001 0.0108
110 0.0110 0.0001 0.0109
111 0.0111 0.0001 0.0110
112 0.0111 0.0001 0.0110
113 0.0112 0.0001 0.0111
114 0.0113 0.0001 0.0112
115 0.0114 0.0001 0.0113
116 0.0115 0.0001 0.0113
117 0.0116 0.0001 0.0115
118 0.0116 0.0001 0.0115
119 0.0118 0.0001 0.0116
120 0.0118 0.0001 0.0117
121 0.0120 0.0001 0.0118
122 0.0120 0.0001 0.0119
123 0.0122 0.0001 0.0120
124 0.0122 0.0001 0.0121
125 0.0124 0.0001 0.0122
126 0.0124 0.0001 0.0123
127 0.0126 0.0001 0.0125
128 0.0127 0.0001 0.0125
129 0.0128 0.0001 0.0127
130 0.0129 0.0001 0.0128
131 0.0130 0.0001 0.0129
132 0.0131 0.0001 0.0130
133 0.0133 0.0001 0.0132
134 0.0134 0.0001 0.0133
135 0.0136 0.0001 0.0134
136 0.0137 0.0001 0.0135
137 0.0139 0.0001 0.0137
138 0.0139 0.0001 0.0138
139 0.0141 0.0001 0.0140
140 0.0143 0.0001 0.0141
141 0.0145 0.0001 0.0143
142 0.0146 0.0001 0.0144
143 0.0148 0.0001 0.0147
144 0.0149 0.0001 0.0148
145 0.0169 0.0002 0.0168
146 0.0171 0.0002 0.0169
147 0.0173 0.0002 0.0172
148 0.0175 0.0002 0.0173
149 0.0178 0.0002 0.0176
150 0.0179 0.0002 0.0177
151 0.0182 0.0002 0.0180
152 0.0184 0.0002 0.0182
153 0.0187 0.0002 0.0185
154 0.0189 0.0002 0.0187
155 0.0192 0.0002 0.0190
156 0.0194 0.0002 0.0192
157 0.0198 0.0002 0.0196
158 0.0200 0.0002 0.0198
159 0.0204 0.0002 0.0202
160 0.0206 0.0002 0.0204
161 0.0211 0.0002 0.0209
162 0.0213 0.0002 0.0211
163 0.0218 0.0002 0.0216
164 0.0221 0.0002 0.0219
165 0.0227 0.0002 0.0224
166 0.0230 0.0002 0.0227
167 0.0236 0.0002 0.0234
168 0.0239 0.0002 0.0237
169 0.0252 0.0003 0.0250
170 0.0256 0.0003 0.0254
171 0.0264 0.0003 0.0262
172 0.0269 0.0003 0.0266
173 0.0278 0.0003 0.0275
174 0.0283 0.0003 0.0280
175 0.0294 0.0003 0.0291
176 0.0300 0.0003 0.0297
177 0.0313 0.0003 0.0310
178 0.0320 0.0003 0.0317
179 0.0336 0.0003 0.0333
180 0.0345 0.0003 0.0342
181 0.0365 0.0004 0.0362
182 0.0377 0.0004 0.0373
183 0.0403 0.0004 0.0399
184 0.0419 0.0004 0.0414
185 0.0522 0.0005 0.0517
186 0.0545 0.0005 0.0539
187 0.0598 0.0006 0.0592
188 0.0634 0.0006 0.0628
189 0.0715 0.0007 0.0708
190 0.0785 0.0008 0.0777
191 0.1032 0.0008 0.1023
192 0.1318 0.0008 0.1310
193 0.2905 0.0008 0.2897
194 0.0882 0.0008 0.0873
195 0.0675 0.0007 0.0669
196 0.0569 0.0006 0.0564
197 0.0436 0.0004 0.0431
198 0.0389 0.0004 0.0385
199 0.0355 0.0004 0.0351
200 0.0328 0.0003 0.0325
201 0.0306 0.0003 0.0303
202 0.0289 0.0003 0.0286
203 0.0273 0.0003 0.0271
204 0.0260 0.0003 0.0258
205 0.0243 0.0002 0.0240
206 0.0233 0.0002 0.0230
207 0.0224 0.0002 0.0222
208 0.0216 0.0002 0.0214
209 0.0209 0.0002 0.0206
210 0.0202 0.0002 0.0200
211 0.0196 0.0002 0.0194
212 0.0190 0.0002 0.0188
213 0.0185 0.0002 0.0183
214 0.0181 0.0002 0.0179
215 0.0176 0.0002 0.0174
216 0.0172 0.0002 0.0170
217 0.0150 0.0002 0.0149
218 0.0147 0.0001 0.0145
219 0.0144 0.0001 0.0142
220 0.0140 0.0001 0.0139
221 0.0138 0.0001 0.0136
222 0.0135 0.0001 0.0133
223 0.0132 0.0001 0.0131
224 0.0130 0.0001 0.0128
225 0.0127 0.0001 0.0126
226 0.0125 0.0001 0.0124
227 0.0123 0.0001 0.0122
228 0.0121 0.0001 0.0120
229 0.0119 0.0001 0.0118
230 0.0117 0.0001 0.0116
231 0.0115 0.0001 0.0114
232 0.0113 0.0001 0.0112
233 0.0112 0.0001 0.0111
234 0.0110 0.0001 0.0109
235 0.0109 0.0001 0.0108
236 0.0107 0.0001 0.0106
237 0.0106 0.0001 0.0105
238 0.0104 0.0001 0.0103
239 0.0103 0.0001 0.0102
240 0.0102 0.0001 0.0101
241 0.0101 0.0001 0.0100
242 0.0099 0.0001 0.0098
243 0.0098 0.0001 0.0097
244 0.0097 0.0001 0.0096
245 0.0096 0.0001 0.0095
246 0.0095 0.0001 0.0094
247 0.0094 0.0001 0.0093
248 0.0093 0.0001 0.0092
249 0.0092 0.0001 0.0091
250 0.0091 0.0001 0.0090
251 0.0090 0.0001 0.0089
252 0.0089 0.0001 0.0088
253 0.0088 0.0001 0.0087
254 0.0087 0.0001 0.0087
255 0.0087 0.0001 0.0086
256 0.0086 0.0001 0.0085
257 0.0085 0.0001 0.0084
258 0.0084 0.0001 0.0083
259 0.0084 0.0001 0.0083
260 0.0083 0.0001 0.0082
261 0.0082 0.0001 0.0081
262 0.0081 0.0001 0.0081
263 0.0081 0.0001 0.0080
264 0.0080 0.0001 0.0079
265 0.0079 0.0001 0.0079
266 0.0079 0.0001 0.0078
267 0.0078 0.0001 0.0077
268 0.0078 0.0001 0.0077
269 0.0077 0.0001 0.0076
270 0.0076 0.0001 0.0076
271 0.0076 0.0001 0.0075
272 0.0075 0.0001 0.0075
273 0.0075 0.0001 0.0074
274 0.0074 0.0001 0.0073
275 0.0074 0.0001 0.0073
276 0.0073 0.0001 0.0072
277 0.0073 0.0001 0.0072
278 0.0072 0.0001 0.0071
279 0.0072 0.0001 0.0071
280 0.0071 0.0001 0.0070
281 0.0071 0.0001 0.0070
282 0.0070 0.0001 0.0070
283 0.0070 0.0001 0.0069
284 0.0069 0.0001 0.0069
285 0.0069 0.0001 0.0068
286 0.0068 0.0001 0.0068
287 0.0068 0.0001 0.0067
288 0.0068 0.0001 0.0067
TOTAL STORM RAINFALL(INCHES) = 4.65
TOTAL SOIL-LOSS(INCHES) = 0.04
TOTAL EFFECTIVE RAINFALL(INCHES) = 4.61
---------------------------------------------------------------------------- TOTAL SOIL-LOSS VOLUME(ACRE-FEET) = 0.1336
TOTAL STORM RUNOFF VOLUME(ACRE-FEET) = 14.0793
----------------------------------------------------------------------------
============================================================================ 2 4 - 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 FIVE-MINUTE UNIT INTERVALS(CFS)
(Note: Time indicated is at END of Each Unit Intervals) ---------------------------------------------------------------------------- TIME(HRS) VOLUME(AF) Q(CFS) 0. 20.0 40.0 60.0 80.0
----------------------------------------------------------------------------
0.083 0.0010 0.15 Q . . . .
0.167 0.0078 0.98 Q . . . .
0.250 0.0218 2.03 VQ . . . .
0.333 0.0385 2.42 VQ . . . .
0.417 0.0567 2.65 VQ . . . .
0.500 0.0760 2.80 VQ . . . .
0.583 0.0959 2.89 VQ . . . .
0.667 0.1162 2.94 VQ . . . .
0.750 0.1366 2.96 VQ . . . .
0.833 0.1571 2.98 VQ . . . .
0.917 0.1777 3.00 VQ . . . .
1.000 0.1985 3.02 VQ . . . .
1.083 0.2194 3.03 VQ . . . .
1.167 0.2404 3.05 VQ . . . .
1.250 0.2615 3.07 VQ . . . .
1.333 0.2827 3.08 VQ . . . .
1.417 0.3040 3.09 VQ . . . .
1.500 0.3253 3.10 VQ . . . .
1.583 0.3467 3.11 VQ . . . .
1.667 0.3682 3.12 .Q . . . .
1.750 0.3897 3.13 .Q . . . .
1.833 0.4113 3.14 .Q . . . .
1.917 0.4330 3.15 .Q . . . .
2.000 0.4548 3.16 .Q . . . .
2.083 0.4766 3.17 .Q . . . .
2.167 0.4985 3.18 .Q . . . .
2.250 0.5205 3.19 .Q . . . .
2.333 0.5426 3.20 .Q . . . .
2.417 0.5647 3.22 .Q . . . .
2.500 0.5870 3.23 .Q . . . .
2.583 0.6093 3.24 .Q . . . .
2.667 0.6316 3.25 .Q . . . .
2.750 0.6541 3.26 .Q . . . .
2.833 0.6766 3.27 .Q . . . .
2.917 0.6993 3.28 .Q . . . .
3.000 0.7220 3.30 .QV . . . .
3.083 0.7448 3.31 .QV . . . .
3.167 0.7676 3.32 .QV . . . .
3.250 0.7906 3.33 .QV . . . .
3.333 0.8136 3.35 .QV . . . .
3.417 0.8368 3.36 .QV . . . .
3.500 0.8600 3.37 .QV . . . .
3.583 0.8833 3.38 .QV . . . .
3.667 0.9067 3.40 .QV . . . .
3.750 0.9302 3.41 .QV . . . .
3.833 0.9538 3.42 .QV . . . .
3.917 0.9774 3.44 .QV . . . .
4.000 1.0012 3.45 .QV . . . .
4.083 1.0251 3.46 .QV . . . .
4.167 1.0490 3.48 .QV . . . .
4.250 1.0731 3.49 .Q V . . . .
4.333 1.0972 3.51 .Q V . . . .
4.417 1.1215 3.52 .Q V . . . .
4.500 1.1458 3.54 .Q V . . . .
4.583 1.1703 3.55 .Q V . . . .
4.667 1.1948 3.57 .Q V . . . .
4.750 1.2195 3.58 .Q V . . . .
4.833 1.2443 3.60 .Q V . . . .
4.917 1.2691 3.61 .Q V . . . .
5.000 1.2941 3.63 .Q V . . . .
5.083 1.3192 3.64 .Q V . . . .
5.167 1.3444 3.66 .Q V . . . .
5.250 1.3697 3.67 .Q V . . . .
5.333 1.3951 3.69 .Q V . . . .
5.417 1.4206 3.71 .Q V . . . .
5.500 1.4463 3.72 .Q V . . . .
5.583 1.4720 3.74 .Q V . . . .
5.667 1.4979 3.76 .Q V . . . .
5.750 1.5239 3.78 .Q V . . . .
5.833 1.5500 3.79 .Q V . . . .
5.917 1.5763 3.81 .Q V . . . .
6.000 1.6027 3.83 .Q V . . . .
6.083 1.6291 3.85 .Q V . . . .
6.167 1.6558 3.87 .Q V . . . .
6.250 1.6825 3.88 .Q V . . . .
6.333 1.7094 3.90 .Q V . . . .
6.417 1.7364 3.92 .Q V . . . .
6.500 1.7636 3.94 .Q V . . . .
6.583 1.7908 3.96 .Q V . . . .
6.667 1.8183 3.98 .Q V . . . .
6.750 1.8458 4.00 . Q V . . . .
6.833 1.8735 4.02 . Q V . . . .
6.917 1.9014 4.04 . Q V . . . .
7.000 1.9294 4.06 . Q V . . . .
7.083 1.9575 4.09 . Q V . . . .
7.167 1.9858 4.11 . Q V . . . .
7.250 2.0142 4.13 . Q V . . . .
7.333 2.0428 4.15 . Q V . . . .
7.417 2.0716 4.18 . Q V . . . .
7.500 2.1005 4.20 . Q V . . . .
7.583 2.1296 4.22 . Q V . . . .
7.667 2.1588 4.25 . Q V . . . .
7.750 2.1882 4.27 . Q V . . . .
7.833 2.2178 4.29 . Q V . . . .
7.917 2.2475 4.32 . Q V . . . .
8.000 2.2775 4.34 . Q V . . . .
8.083 2.3076 4.37 . Q V . . . .
8.167 2.3378 4.40 . Q V . . . .
8.250 2.3683 4.42 . Q V . . . .
8.333 2.3990 4.45 . Q V . . . .
8.417 2.4298 4.48 . Q V . . . .
8.500 2.4608 4.51 . Q V . . . .
8.583 2.4920 4.53 . Q V . . . .
8.667 2.5235 4.56 . Q V . . . .
8.750 2.5551 4.59 . Q V . . . .
8.833 2.5869 4.62 . Q V . . . .
8.917 2.6190 4.65 . Q V . . . .
9.000 2.6512 4.68 . Q V . . . .
9.083 2.6837 4.72 . Q V . . . .
9.167 2.7164 4.75 . Q V . . . .
9.250 2.7493 4.78 . Q V . . . .
9.333 2.7825 4.81 . Q V . . . .
9.417 2.8159 4.85 . Q V . . . .
9.500 2.8495 4.88 . Q V . . . .
9.583 2.8834 4.92 . Q V . . . .
9.667 2.9175 4.95 . Q V . . . .
9.750 2.9519 4.99 . Q V . . . .
9.833 2.9865 5.03 . Q V . . . .
9.917 3.0214 5.07 . Q V . . . .
10.000 3.0566 5.11 . Q V . . . .
10.083 3.0920 5.15 . Q V . . . .
10.167 3.1278 5.19 . Q V . . . .
10.250 3.1638 5.23 . Q V . . . .
10.333 3.2001 5.27 . Q V. . . .
10.417 3.2367 5.32 . Q V. . . .
10.500 3.2736 5.36 . Q V. . . .
10.583 3.3109 5.41 . Q V. . . .
10.667 3.3484 5.45 . Q V. . . .
10.750 3.3863 5.50 . Q V. . . .
10.833 3.4245 5.55 . Q V. . . .
10.917 3.4631 5.60 . Q V. . . .
11.000 3.5020 5.65 . Q V. . . .
11.083 3.5413 5.71 . Q V . . .
11.167 3.5810 5.76 . Q V . . .
11.250 3.6210 5.82 . Q V . . .
11.333 3.6615 5.87 . Q V . . .
11.417 3.7023 5.93 . Q V . . .
11.500 3.7436 5.99 . Q V . . .
11.583 3.7853 6.05 . Q V . . .
11.667 3.8274 6.12 . Q V . . .
11.750 3.8700 6.18 . Q V . . .
11.833 3.9130 6.25 . Q .V . . .
11.917 3.9566 6.32 . Q .V . . .
12.000 4.0006 6.39 . Q .V . . .
12.083 4.0454 6.51 . Q .V . . .
12.167 4.0922 6.80 . Q .V . . .
12.250 4.1416 7.16 . Q .V . . .
12.333 4.1921 7.34 . Q .V . . .
12.417 4.2437 7.49 . Q . V . . .
12.500 4.2962 7.62 . Q . V . . .
12.583 4.3494 7.73 . Q . V . . .
12.667 4.4034 7.84 . Q . V . . .
12.750 4.4581 7.94 . Q . V . . .
12.833 4.5135 8.04 . Q . V . . .
12.917 4.5696 8.15 . Q . V . . .
13.000 4.6265 8.26 . Q . V . . .
13.083 4.6843 8.38 . Q . V . . .
13.167 4.7428 8.50 . Q . V . . .
13.250 4.8023 8.63 . Q . V . . .
13.333 4.8626 8.76 . Q . V . . .
13.417 4.9239 8.90 . Q . V . . .
13.500 4.9862 9.04 . Q . V . . .
13.583 5.0495 9.19 . Q . V . . .
13.667 5.1138 9.35 . Q . V . . .
13.750 5.1794 9.51 . Q . V . . .
13.833 5.2461 9.68 . Q . V . . .
13.917 5.3140 9.87 . Q . V . . .
14.000 5.3833 10.06 . Q . V . . .
14.083 5.4541 10.28 . Q . V . . .
14.167 5.5269 10.57 . Q . V . . .
14.250 5.6020 10.90 . Q . V . . .
14.333 5.6790 11.18 . Q . V . . .
14.417 5.7580 11.47 . Q . V . . .
14.500 5.8389 11.76 . Q . V . . .
14.583 5.9221 12.07 . Q . V . . .
14.667 6.0075 12.40 . Q . V . . .
14.750 6.0954 12.76 . Q . V . . .
14.833 6.1859 13.15 . Q . V . . .
14.917 6.2794 13.57 . Q . V . . .
15.000 6.3761 14.04 . Q . V . . .
15.083 6.4764 14.56 . Q . V . . .
15.167 6.5806 15.14 . Q . V . . .
15.250 6.6894 15.79 . Q . V. . .
15.333 6.8032 16.53 . Q . V. . .
15.417 6.9240 17.54 . Q . V. . .
15.500 7.0574 19.36 . Q. V . .
15.583 7.2063 21.62 . Q V . .
15.667 7.3678 23.44 . .Q V . .
15.750 7.5431 25.46 . . Q .V . .
15.833 7.7346 27.81 . . Q .V . .
15.917 7.9486 31.07 . . Q . V . .
16.000 8.2011 36.66 . . Q . V . .
16.083 8.5356 48.57 . . . Q . .
16.167 9.0178 70.02 . . . V . Q .
16.250 9.5163 72.38 . . . V . Q .
16.333 9.8499 48.45 . . . Q V . .
16.417 10.1130 38.20 . . Q. V . .
16.500 10.3246 30.72 . . Q . V. .
16.583 10.4946 24.68 . . Q . V. .
16.667 10.6362 20.56 . Q . V .
16.750 10.7569 17.53 . Q . . V .
16.833 10.8665 15.92 . Q . . V .
16.917 10.9680 14.73 . Q . . .V .
17.000 11.0629 13.79 . Q . . .V .
17.083 11.1524 12.99 . Q . . .V .
17.167 11.2364 12.20 . Q . . .V .
17.250 11.3147 11.37 . Q . . . V .
17.333 11.3881 10.65 . Q . . . V .
17.417 11.4580 10.16 . Q . . . V .
17.500 11.5251 9.74 . Q . . . V .
17.583 11.5897 9.38 . Q . . . V .
17.667 11.6521 9.06 . Q . . . V .
17.750 11.7125 8.77 . Q . . . V .
17.833 11.7711 8.51 . Q . . . V .
17.917 11.8280 8.27 . Q . . . V .
18.000 11.8835 8.05 . Q . . . V .
18.083 11.9373 7.81 . Q . . . V .
18.167 11.9882 7.40 . Q . . . V .
18.250 12.0361 6.95 . Q . . . V .
18.333 12.0821 6.68 . Q . . . V .
18.417 12.1266 6.47 . Q . . . V .
18.500 12.1700 6.29 . Q . . . V .
18.583 12.2122 6.14 . Q . . . V .
18.667 12.2535 6.00 . Q . . . V .
18.750 12.2940 5.88 . Q . . . V .
18.833 12.3337 5.76 . Q . . . V .
18.917 12.3726 5.65 . Q . . . V .
19.000 12.4108 5.55 . Q . . . V .
19.083 12.4484 5.45 . Q . . . V .
19.167 12.4852 5.35 . Q . . . V .
19.250 12.5215 5.26 . Q . . . V .
19.333 12.5572 5.18 . Q . . . V .
19.417 12.5923 5.10 . Q . . . V .
19.500 12.6269 5.02 . Q . . . V .
19.583 12.6610 4.95 . Q . . . V .
19.667 12.6945 4.88 . Q . . . V .
19.750 12.7276 4.81 . Q . . . V .
19.833 12.7603 4.74 . Q . . . V .
19.917 12.7925 4.68 . Q . . . V .
20.000 12.8243 4.62 . Q . . . V .
20.083 12.8557 4.56 . Q . . . V .
20.167 12.8867 4.50 . Q . . . V .
20.250 12.9173 4.44 . Q . . . V .
20.333 12.9475 4.39 . Q . . . V .
20.417 12.9774 4.34 . Q . . . V .
20.500 13.0069 4.29 . Q . . . V .
20.583 13.0361 4.24 . Q . . . V .
20.667 13.0650 4.19 . Q . . . V .
20.750 13.0936 4.15 . Q . . . V .
20.833 13.1218 4.10 . Q . . . V .
20.917 13.1498 4.06 . Q . . . V .
21.000 13.1775 4.02 . Q . . . V .
21.083 13.2049 3.98 .Q . . . V .
21.167 13.2320 3.94 .Q . . . V .
21.250 13.2588 3.90 .Q . . . V .
21.333 13.2854 3.86 .Q . . . V .
21.417 13.3117 3.82 .Q . . . V .
21.500 13.3378 3.79 .Q . . . V .
21.583 13.3637 3.75 .Q . . . V .
21.667 13.3893 3.72 .Q . . . V .
21.750 13.4147 3.69 .Q . . . V .
21.833 13.4399 3.65 .Q . . . V .
21.917 13.4648 3.62 .Q . . . V .
22.000 13.4896 3.59 .Q . . . V .
22.083 13.5141 3.56 .Q . . . V .
22.167 13.5384 3.53 .Q . . . V .
22.250 13.5625 3.50 .Q . . . V .
22.333 13.5865 3.48 .Q . . . V .
22.417 13.6102 3.45 .Q . . . V .
22.500 13.6338 3.42 .Q . . . V .
22.583 13.6571 3.39 .Q . . . V .
22.667 13.6803 3.37 .Q . . . V .
22.750 13.7034 3.34 .Q . . . V .
22.833 13.7262 3.32 .Q . . . V .
22.917 13.7489 3.29 .Q . . . V.
23.000 13.7714 3.27 .Q . . . V.
23.083 13.7938 3.25 .Q . . . V.
23.167 13.8160 3.22 .Q . . . V.
23.250 13.8380 3.20 .Q . . . V.
23.333 13.8599 3.18 .Q . . . V.
23.417 13.8816 3.16 .Q . . . V.
23.500 13.9032 3.14 .Q . . . V.
23.583 13.9247 3.11 .Q . . . V.
23.667 13.9460 3.09 .Q . . . V.
23.750 13.9672 3.07 .Q . . . V.
23.833 13.9882 3.05 .Q . . . V.
23.917 14.0091 3.03 .Q . . . V.
24.000 14.0299 3.02 .Q . . . V.
24.083 14.0495 2.84 .Q . . . V.
24.167 14.0633 2.00 .Q . . . V.
24.250 14.0698 0.94 Q . . . V.
24.333 14.0736 0.55 Q . . . V.
24.417 14.0758 0.33 Q . . . V.
24.500 14.0771 0.18 Q . . . V.
24.583 14.0778 0.10 Q . . . V.
24.667 14.0782 0.06 Q . . . V.
24.750 14.0785 0.05 Q . . . V.
24.833 14.0788 0.04 Q . . . V.
24.917 14.0790 0.03 Q . . . V.
25.000 14.0792 0.02 Q . . . V.
25.083 14.0793 0.01 Q . . . V.
25.167 14.0793 0.01 Q . . . V
----------------------------------------------------------------------------- ---
TIME DURATION(minutes) OF PERCENTILES OF ESTIMATED PEAK FLOW RATE:
(Note: 100% of Peak Flow Rate estimate assumed to have
an instantaneous time duration)
Percentile of Estimated Duration
Peak Flow Rate (minutes)
======================= =========
0% 1510.0
10% 355.0
20% 115.0
30% 60.0
40% 40.0
50% 30.0
60% 20.0
70% 10.0
80% 10.0
90% 10.0
============================================================================ END OF FLOODSCx ROUTING ANALYSIS
Final - Grand Terrace Storm Drain Master Plan
June 2026 Q3 Consulting
Appendix B
XPSTORM Profiles & Result Data
June 2026 Q3 Consulting
Appendix B.1
Proposed Facility XP Profiles
MICHIGAN ST MATCHLINE SEE NEXT SHEET
Join Phase 1 SD Plans (per separate study)
Max 100yr HGL
Ex Ground
Prop 54"
L=37 ft
Q100 = 360 cfs Prop 54"
L=515 ft
Q100 = 320 cfs
Prop 54"
L=467 ft
Q100 = 293 cfs
Prop 54"
L=275 ft
Q100 = 286 cfsXP Model GTMP_PR_Run02 GARDEN AVE SANDBURG WAY EXHIBIT 3.1
Recommendation utilizes some surface
flow. Flap Gates Recommended
B.1.1 Page 297 of 847
MICHIGAN ST PASCAL AVE MATCHLINE
Ex Ground Max 100yr HGL Prop 48"
L=102 ft
Q100 = 252 cfs
Prop 42"
L=331 ft
Q100 = 166 cfs
Prop 42"
L=518 ft
Q100 = 134 cfs
Prop 42"
L=289 ft
Q100 = 114 cfs XP Model GTMP_PR_Run02 3.2 EXHIBIT
Recommendation utilizes some surface
flow. Flap Gates Recommended
B.1.1 Page 298 of 847
PASCAL AVE MICHIGAN ST
Max 100yr HGL
Prop 36"
L=917 ft
Q100 = 61 cfs
Ex Ground
XP Model GTMP_PR_Run02
Join Phase 1 SD Plans (per separate study) 4
EXHIBIT B.1.2 Page 299 of 847
June 2026 Q3 Consulting
Appendix B.2
XP Results Existing Conditions
Digital Files
June 2026 Q3 Consulting
Appendix B.3
XP Results Ultimate Conditions
Digital Files
AGENDA REPORT
MEETING DATE: June 23, 2026
TITLE: Approval of On-Call Planning and Environmental Review Consultant Lists and Professional Services Agreements
PRESENTED BY: Gabriel Arguelles, Associate Planner
RECOMMENDATION: APPROVE PROFESSIONAL SERVICES AGREEMENTS BETWEEN THE
CITY OF GRAND TERRACE AND THE NINE CONSULTANT FIRMS
SELECTED FOR THE PLANNING AND ENVIRONMENTAL REVIEW
SERVICES ON-CALL LISTS, EACH FOR A THREE-YEAR TERM,
SUBJECT TO THE CITY MANAGER'S APPROVAL/NEGOTIATION AND
THE CITY ATTORNEY'S APPROVAL AS TO FORM; AND
AUTHORIZE THE CITY MANAGER TO EXECUTE THE AGREEMENTS,
SUBJECT TO THE CITY MANAGER'S APPROVAL/NEGOTIATION AND
THE CITY ATTORNEY'S APPROVAL AS TO FORM.
2030 VISION STATEMENT:
This item supports Goal #1: Ensure Our Fiscal Viability by utilizing cost recovery and flexible service delivery methods, and Goal #3: Promote Economic Development by ensuring adequate staffing resources are available to facilitate the processing of development projects and environmental review.
BACKGROUND:
The City established its Planning and Environmental Review On-Call Consultant Lists in 2023 to provide additional staffing resources and specialized expertise to assist with development review and environmental analysis. The existing on-call lists have proven to be an effective tool for supplementing staff capacity and maintaining project timelines.
On March 26, 2026, the City issued a Request for Qualifications (RFQ) seeking qualified firms to provide on-call planning services and environmental review services. The purpose of the RFQ was to update and expand the City's existing on-call lists to ensure continued access to consultants with a broad range of expertise and experience working with public agencies. The RFQ was made available through the Public Purchase system, and Statements of Qualifications (SOQs) were due on April 24, 2026.
The City received a total of twenty-one (21) SOQs from consulting firms interested in providing planning services, environmental review services, or both. Staff reviewed and evaluated each submittal in accordance with the evaluation criteria established in the RFQ.
DISCUSSION:
The evaluation process considered each firm's organizational capacity, qualifications of key
personnel, relevant project experience, management approach, professional standing, and familiarity with the City and the Inland Empire region. Based on this review, staff recommends establishing an on-call list consisting of six (6) firms qualified to provide both planning and environmental review services and three (3) firms qualified to provide environmental review services only.
The consultants selected for the on-call lists will be used on an as-needed basis over a three-year period. Selection to the on-call list does not guarantee that a consultant will receive work assignments. Rather, the on-call lists are intended to streamline the consultant selection process and provide the City with flexibility to address fluctuations in workload, specialized project needs, and statutory timelines.
For projects requiring consultant assistance, City staff will identify firms on the on-call list with the qualifications and availability appropriate for the assignment and solicit project-specific proposals.
Staff will review the proposed scope of work, schedule, and not-to-exceed cost estimate and select the consultant that best meets the needs of the project.
Approval of the on-call agreements does not obligate the City to expend funds. For privately initiated development projects, consultant services will generally be funded through reimbursement agreements between the City and the applicant. Under this process, the City retains responsibility for defining the scope of work, selecting the consultant, and administering the contract, while the applicant provides the funding necessary to cover consultant costs. Consultant work will not commence until the reimbursement agreement has been executed, the required deposit has been received by the City, and a Notice to Proceed has been issued. For City-initiated projects, any consultant costs requiring City funding will be brought forward separately for authorization, as appropriate.
ENVIRONMENTAL IMPACT:
The approval of the on-call consultant lists and associated professional services agreements is not a "project" as defined by Section 15378 of the California Environmental Quality Act (CEQA) Guidelines because it does not have the potential to result in either a direct physical change in the environment or a reasonably foreseeable indirect physical change in the environment. Therefore, CEQA review is not required.
FISCAL IMPACT:
There is no immediate fiscal impact associated with establishing the on-call planning and environmental review consultant lists. Approval of the agreements does not authorize work or obligate the City to expend funds. Consultant costs associated with private development projects will generally be funded by the applicant through reimbursement agreements. Any City-funded assignments will be brought forward separately for authorization, as appropriate.
Request for Qualifications
for
On-Call List for Planning Services and Environmental
Review Services
Issued: March 26, 2026
Submissions Due: April 24, 2026, by 2:00 p.m. (PDT)
RFQ Contact:
Gabriel Arguelles
Planning and Development Services Department
City of Grand Terrace
(909) 954-5176
[email protected]
Request for Qualifications
On-Call List for Planning and Environmental Review Services Introduction
The City of Grand Terrace Planning and Development Services Department provides planning, economic development, zoning, and related development services. The Department serves as the professional and technical advisor to the Planning Commission and City Council on matters related to land use and development and implements adopted policies supporting the orderly physical and economic growth of the City.
Department responsibilities include processing development applications; responding to public inquiries; issuing environmental clearances; administering planning and development actions that do not require Planning Commission or City Council approval; assisting new, relocating, and expanding businesses; monitoring compliance with project entitlements; and maintaining and updating the City’s General Plan, Zoning Code, and Specific Plans.
Background
Grand Terrace is located approximately 60 miles east of Los Angeles in San Bernardino County.
The City is situated along the I-215 freeway between the I-10 and SR-60 freeways and encompasses approximately 3.6 square miles. The City has a population of approximately 12,285.
Grand Terrace was incorporated in 1978 as a general law city operating under a Council-Manager form of government. The City Council consists of five (5) Council Members elected at-large for four-year terms. The Mayor is directly elected for a four-year term. The City Council appoints the City Manager and City Attorney. The City’s fiscal year runs from July 1 through June 30.
The City established Planning and Environmental Review On-Call Consultant Lists in 2023 for a three-year term. The purpose of this RFQ is to update and expand the On-Call Lists to ensure the City has access to qualified consultants with a range of expertise to support a variety of project types. Consultants on the On-Call Lists will be rotated for assignment of projects based on qualifications, availability, and project needs.
Scope of Service
From time to time, the Planning Division requires additional professional planning services, environmental review services, and technical expertise, either to supplement City staff capacity for project management or to provide independent technical analysis. The City is issuing this Request for Qualifications (RFQ) to identify consultant firms with demonstrated experience working with public agencies to provide planning and environmental review services and to streamline consultant selection for future assignments.
A. Statements of Qualifications (SOQ) are to be submitted by consultant firms in response to the RFQ. Only firms that respond to the RFQ will be considered for the Planning Services On-Call List or Environmental Review Services On-Call List or both. The City will use
the On-Call Consultant Lists to select qualified planning and/or environmental review services consultants on an as-needed basis. The City intends to contract with at least six (6) firms. Once approved by the City Council, the On-Call List will be valid for a three (3) year period.
B. Selection of Consultant Firms to Provide Planning Services and/or Environmental Review Services:
As projects are received that require additional professional planning and/or environmental review services and technical expertise, the City staff will provide a description of the project and the requested services to at least six (6) firms on the List with demonstrated expertise in the services requested. Each consultant will in turn provide a scope of work and a not to exceed cost estimate based upon its fixed fee schedule. City staff will review the materials received from each consultant to identify the consultant with the best work plan and budget (selection may not be based on the lowest budget), and will then negotiate with that consultant to develop a mutually acceptable professional services agreement. If the City and selected consultant are not able to reach an agreement, the City will consider the second highest ranked submission.
C. Project Assignment & Continuity:
For each assigned project, the selected consultant shall designate a Project Manager and key project team members who will remain responsible for the project from initiation through completion. Continuity of assigned personnel is essential to ensure accountability, efficiency, and retention of project knowledge.
Substitution or reassignment of the Project Manager or other key personnel during an active assignment shall not occur without prior written approval from the City. Any proposed substitution must demonstrate qualifications and experience equal to or exceeding those of the originally assigned personnel. All costs associated with transitioning new personnel and bringing them up to speed on the project shall be borne solely by the consultant firm and shall not be billable to the City. The City reserves the right to reject any proposed substitution that does not meet project requirements or performance expectations.
D. End-to-End Processing:
Consultants selected from the On-Call Lists may be assigned projects to be processed from initial intake and environmental review through public hearings, final action, and completion of all required documentation. Consultants shall coordinate all project components, meet established deadlines, and deliver complete and accurate work products suitable for public review and decision-maker consideration.
E. Reimbursement-Based Projects:
Some projects assigned under the On-Call Lists will be initiated by private applicants or developers and funded through reimbursement agreements between the City and the applicant.
For reimbursement-based projects:
1. The City will define and refine the project scope of work.
2. The City will solicit proposals from qualified firms on the On-Call Lists.
3. The selected consultant shall submit a detailed scope of services, schedule, and notto-exceed cost proposal for City review and approval.
4. Prior to authorizing consultant work, the City will execute a reimbursement agreement with the applicant to secure funding for consultant services.
5. No consultant work shall begin until:
• The reimbursement agreement is fully executed,
• Required applicant payment or deposit has been received by the City, and • The City issues a written Notice to Proceed to the consultant.
The Notice to Proceed will establish the approved scope of work, authorized start date, and not-to-exceed cost amount. Consultants shall perform work only within the authorized scope and budget identified in the Notice to Proceed.
Consultants shall have no contractual or payment relationship with project applicants. The City retains full authority over consultant selection, contracting, and project administration.
Following issuance of the Notice to Proceed, the City will schedule a project kickoff meeting with the consultant, applicant (as appropriate), and relevant City staff to confirm scope, schedule, communication protocols, and deliverables.
F. Professional Standards, Clarity, and Project-Specific Analysis:
All work products shall be professionally prepared, project-specific, internally consistent, and written in clear, concise language appropriate for public review and decision-maker consideration. Deliverables shall reflect independent analysis and avoid excessive boilerplate, generic, or unrelated content.
All work products shall be reviewed and approved by a Senior Project Manager or other qualified supervisory professional within the consultant’s firm prior to submittal to City staff.
All work shall comply with applicable laws, regulations, and City policies and shall be suitable for public distribution without requiring substantial revision by the City.
G. Quality Control:
The consultant firm(s) shall implement internal quality assurance and quality control procedures prior to submitting any deliverables to the City. All deliverables shall be reviewed by a senior professional familiar with the project scope to ensure accuracy, completeness, and consistency before submittal.
H. Performance Monitoring:
Consultant performance, including quality of work products, adherence to schedules, and responsiveness, will be considered when assigning future task orders and when determining continued inclusion on the on-call list.
I. Revisions:
If deliverables are determined by the City to be incomplete, inaccurate, or not in conformance with the approved scope of work, the consultant shall revise and resubmit the deliverables at no additional cost to the City.
Scope of Work
A. Planning Services: Selected consultants for Planning Services shall have demonstrated expertise in processing applications for various types of projects that include, but not limited to, residential, commercial, industrial, mixed use and transit-oriented development.
Some applications may require a General Plan Amendment, Zone Change, establishment of a Planned Development Overlay, etc. Typical Planning Services Tasks include:
• Conduct initial site and project assessments.
• Review projects for completeness and compliance with the General Plan, Zoning Code, applicable Specific Plans (including the Barton Road Specific Plan, if applicable), Design Guidelines, and all relevant codes and ordinances. • Prepare written correspondence, comment and review letters, technical memoranda, tribal consultation materials, and recommendation letters for City review and approval prior to issuance.
• Attend and participate in Development Advisory Board (DAB) or interdepartmental coordination meetings and facilitate collection of agency comments. • Coordinate comments from members of the Development Advisory Board (DAB). • Serve as a primary point of contact with project applicants and their representatives, including conducting meetings as needed.
• Coordinate directly with project applicants and their representatives. • Conduct and complete project-level CEQA review, including public postings, circulation of documents, determinations, findings, and required state and county filings.
• Prepare public hearing notices, staff reports, resolutions, findings, and conditions of approval suitable for public review and decision-maker consideration. • Attend and present at Planning Commission and City Council meetings, including inperson meetings as required.
• File management for the project.
• Manage multiple concurrent projects and competing priorities while maintaining highquality work products, meeting established schedules, and staying within approved budgets.
• Plan Check review of projects including, but not limited to construction plans, grading plan, landscape and irrigation plans, lighting plans, etc. for compliance with conditions of approval.
B. Selected consultants for Environmental Review Services shall demonstrate expertise in preparing and managing environmental review documents in compliance with the California Environmental Quality Act (CEQA). Assignments may include responsibility for environmental review activities from initial project assessment through public hearings, final action, and completion of all required filings and documentation.
Environmental Review Services may include, but are not limited to, the following tasks:
• Conduct initial site and environmental assessments.
• Prepare CEQA Initial Studies to determine the appropriate level of environmental review, including Categorical Exemption (CE), Negative Declaration (ND), Mitigated Negative Declaration (MND), or Environmental Impact Report (EIR) . • Noise Studies.
• Air Quality Studies.
• Transportation Studies.
• Water Quality/Storm and Wastewater Control Management. • Greenhouse Gas Emission Studies.
• Biological and Cultural Resources Studies.
• Environmental Mitigation Studies/Reports.
• Coordinate and distribute environmental documents and notices. • Identify and evaluate environmental impacts and prepare mitigation measures and mitigation monitoring and reporting programs (MMRP), as applicable. • Preparation of Public Notices.
• Presentations at public meetings.
• Coordinate preparation, circulation, and distribution of environmental documents and CEQA notices.
• Prepare and file all required CEQA notices and documentation, including Notices of Exemption, Notices of Intent, Notices of Determination, and related filings. • Attend and present at public meetings, including Planning Commission and City Council hearings, as required.
Statement of Qualifications Format
The Statement of Qualifications must include at a minimum, the following information:
A. Firm Overview: Provide a brief description of the firm, including the year established, legal structure (e.g., corporation, partnership), areas of professional expertise, and a summary of qualifications relevant to the planning and/or environmental review services described in this RFQ.
B. Project Team and Key Personnel: Identify the proposed Project Manager and key personnel who would be assigned to City projects and provide a summary of their qualifications, experience, and professional credentials. Clearly describe each individual’s role and level of involvement in assigned projects.
C. Relevant Project Experience: Provide a summary of relevant projects demonstrating the firm’s and proposed team’s experience providing planning services and/or environmental review services similar in scope and complexity to those anticipated by the City. Emphasis should be placed on work performed for public agencies.
D. Subconsultants: A list of sub-consultants to be used, if any, and their relevant expertise.
E. References: A list of references of relevant clients, including a contact person with their current telephone number and email address.
F. Fee Schedule: Provide a fixed fee schedule identifying hourly rates and staff classifications for all personnel who may be assigned to City projects. The fee schedule shall be submitted as a separate file labeled “Fee Schedule” and will not be used for initial evaluation or ranking.
Statement of Qualifications Submittal Requirements
Submissions shall be submitted electronically via Public Purchase. All Statements of Qualifications (SOQs) must be received no later than April 24, 2026, at 2:00 p.m. (PDT). Late submittals will not be accepted. Submissions shall include all required materials as identified in this RFQ. It is the responsibility of the proposer to ensure that all documents are successfully uploaded and received prior to the deadline. The City is not responsible for technical issues, upload failures, or other errors that may result in a late or incomplete submission.
Questions and Addenda
Questions regarding this RFQ shall be submitted in writing through the Public Purchase system no later than April 10, 2026, at 2:00 p.m. (PDT).
Responses to questions and any addenda will be posted on Public Purchase. It is the responsibility of proposers to check for updates prior to submitting their SOQ.
Evaluation Procedure
City staff will review each Statement of Qualifications (SOQ) for completeness and content. Each SOQ will be evaluated upon the relevant qualifications and experience of the consultant. Staff may conduct interviews if necessary. License status and references will also be verified. The SOQ will focus on the following criteria:
A. Organization. Does the firm offer the breadth and quality of services required for the types of planning services and/or environmental review services listed in the Scope of Work? Does the firm’s organizational structure show sufficient depth, capacity for its present and additional workload?
B. Staff. Do the qualifications of key personnel to be assigned to the anticipated projects coincide with the tasks listed in the Scope of Work? Do assigned personnel have requisite education, experience and professional qualifications?
C. Experience. Has the firm demonstrated the ability to successfully provide services for projects of a similar complexity and nature described herein? D. Specific Management Approach. Has the firm described its ability to achieve budget and project delivery goals for projects of a similar complexity and nature as described in the Scope of Work?
E. Professional Standing. Are the firm’s references from past clients and associates favorable? Are deliverables submitted on time and within the budget? F. Familiarity with Locality. Is the firm familiar with the City and the Inland Empire? G. No single factor is determinative.
Selection Process
Based on staff recommendation, the City Council will consider approval of the on-call list for the Planning and Environmental Services On-Call Lists for a three-year period. The City Council may select more than one consultant firm or choose to determine that no SOQ proposal exhibits adequate qualifications.
Upon selection by the City Council, consultants/firms may or may not be called upon by the City to provide planning and/or environmental services. During the three-year period, the City will have the discretion to negotiate with a consultant on the total cost for the consultant services based upon its fixed fee schedule and the scope of work of the project.
Acceptance or Rejection of Submission
The City reserves the right to accept or reject any and all submissions. The City also reserves the right to waive any informality or irregularity in any Qualifications. Additionally, the City may, for any reason decide not to award an agreement as a result of this RFQ. The City shall not be obligated to respond to any RFQ submissions, nor be legally bound in any manner by the submission of the qualifications. The City reserves the right to negotiate the project deliverables and associated costs.
Professional Services Agreement
The award of a professional services agreement resulting from the RFQ shall include terms and conditions similar to those referenced in the City’s standard agreement, which is attached.
Exceptions proposed by the consulting firm, if any, to the terms and conditions included in the City’s standard agreement should be included in the response. The City reserves the right to consider any proposed exceptions during its evaluation of the acceptability of a submission.
Estimated Timeline
• Request for Qualifications Issued March 26, 2026
• Statement of Qualifications Due April 24, 2026
• Interviews (if necessary) Week of April 27, 2026
• City Council Approval May 12, 2026
Conflict of Interest
The Proposer declares and warrants that no elected or appointed official, officer or employee of the City has been or shall be compensated, directly or indirectly, in connection with this RFQ or any work connected with this RFQ. Should any agreement be approved in connection with this Request for Qualifications, Proposer declares and warrants that no elected or appointed official, officer or employee of the City, during the term of his/her service with the City shall have any direct interest in that agreement, or obtain any present, anticipated or future material benefit arising there from.
Costs
The City is not liable for any costs incurred by Proposers before entering into a formal contract.
Costs of developing the proposals, or any other such expenses incurred by the Proposer in responding to this RFQ, are entirely the responsibility of the Proposer, and shall not be reimbursed in any manner by the City. No reimbursable cost may be incurred in anticipation of award.
Disqualification of Proposer
If there is reason to believe that collusion exists among the Proposers, the City may refuse to consider submissions from participants in such collusion. No person, firm, or corporation under the same or different name, shall make, file, or be interested in more than one RFQ for the same work unless alternate submissions are called for. Reasonable grounds for believing that any Proposer is interested in more than one RFQ for the same work will cause the rejection of all submissions for the work in which a Proposer is interested.
Inquiries
For questions regarding this RFQ, please contact:
Gabriel Arguelles
Planning and Development Services Department
City of Grand Terrace
(909) 954-5176
[email protected]
The City reserves the right to request clarification or additional information from any proposer.
CONTRACT SERVICES AGREEMENT
By and Between
CITY OF GRAND TERRACE
and
Civic Solutions, Inc.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 1
AGREEMENT FOR CONTRACT SERVICES
BETWEEN THE CITY OF GRAND TERRACE AND
Civic Solutions, Inc.
This AGREEMENT FOR CONTRACT SERVICES (herein “Agreement”) is made and entered into this 23rd day of June, 2026 (“Effective Date”) by and between the CITY OF GRAND TERRACE, a California municipal corporation (“City”) Civic Solutions, Inc., a California corporation(“Contractor”).
City and Contractor may be referred to, individually or collectively, as “Party” or “Parties.”
RECITALS
A. The City desires to contract with a Contractor to provide services on an on-call basis as more further set forth herein.
B. The City circulated a Request for Quotes or Proposals for the above-described services.
C. Contractor submitted a quote or proposal to City to provide the above-described services.
D. City Staff has reviewed all the proposals and after considering the demonstrated competence of Contractor, the qualifications of Contractor, and the fairness and reasonableness of Contractor’s proposed cost, staff has determined that an agreement to provide the required services should be awarded to Contractor.
OPERATIVE PROVISIONS
NOW, THEREFORE, in consideration of the mutual promises and covenants made by the Parties and contained herein and other consideration, the value and adequacy of which are hereby acknowledged, the Parties agree as follows:
ARTICLE 1. SERVICES OF CONTRACTOR
1.1 Scope of Services.
In compliance with all terms and conditions of this Agreement, Contractor shall provide those services specified in the “Scope of Services” attached hereto as Exhibit “A” and incorporated herein by this reference, which may be referred to herein as the “services” or “work” hereunder. As a material inducement to City entering into this Agreement, Contractor represents and warrants: a) it has the qualifications, experience, and facilities necessary to properly perform the Services required under this Agreement b) all services set forth in the Scope of Services will be performed in a competent and satisfactory manner; c) all materials used for services will be both of good quality as well as fit for the purpose intended; and, d) Contractor shall follow the highest standards and practices in performing the services required hereunder. Individual tasks under the Scope of Services shall be established on a per project basis. Upon request by City, the Contractor shall provide a detailed task proposal including pricing consistent with those hourly rates as provided in Article II, below. Contractor shall not commence work until an Task Order is issued by the City authorizing the Contractor to perform such work.
1.2 Contractor’s Proposal.
The Scope of Services shall include the scope of services or work included in Contractor’s proposal or bid, which shall be incorporated herein by this reference as though fully set forth herein. In the event of any inconsistency between the terms of such proposal or bid, and this Agreement, the terms of this
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 2 Agreement shall govern. No other terms and conditions from Contractor’s proposal or bid, other than description of scope of services or work, shall apply to this Agreement, unless specifically agreed to by City in writing.
1.3 Compliance with Law.
All services rendered hereunder shall be provided in accordance with all ordinances, resolutions, statutes, rules and regulations of City and any federal, State or local governmental agency having jurisdiction in effect at the time services are rendered. City, and its officers, employees and agents, shall not be liable at law or in equity for failure of Contractor to comply with this Section.
1.4 California Labor Law.
If the Scope of Services includes any “public work” or “maintenance work,” as those terms are defined in California Labor Code section 1720 et seq. and California Code of Regulations, Title 8, Section 16000 et seq., and if the total compensation is $1,000 or more, Contractor shall pay prevailing wages for such work and comply with the requirements in California Labor Code section 1770 et seq. and 1810 et seq., and all other applicable laws, including the following requirements:
(a) Public Work. The Parties acknowledge that some or all of the work to be performed under this Agreement is a “public work” as defined in Labor Code Section 1720 and that this Agreement is therefore subject to the requirements of Division 2, Part 7, Chapter 1 (commencing with Section 1720) of the California Labor Code relating to public works contracts and the rules and regulations established by the Department of Industrial Relations (“DIR”) implementing such statutes. The work performed under this Agreement is subject to compliance monitoring and enforcement by the DIR. Contractor shall post job site notices, as prescribed by regulation.
(b) Prevailing Wages. Contractor shall pay prevailing wages to the extent required by Labor Code Section 1771. Pursuant to Labor Code Section 1773.2, copies of the prevailing rate of per diem wages are on file at City Hall and will be made available to any interested party on request. By initiating any work under this Agreement, Contractor acknowledges receipt of a copy of the Department of Industrial Relations (“DIR”) determination of the prevailing rate of per diem wages, and Contractor shall post a copy of the same at each job site where work is performed under this Agreement. (c) Penalty for Failure to Pay Prevailing Wages. Contractor shall comply with and be bound by the provisions of Labor Code Sections 1774 and 1775 concerning the payment of prevailing rates of wages to workers and the penalties for failure to pay prevailing wages. Contractor shall, as a penalty to the City, forfeit two hundred dollars ($200) for each calendar day, or portion thereof, for each worker paid less than prevailing rates as determined by the DIR for the work or craft in which the worker is employed for any public work done pursuant to this Agreement by Contractor or by any subcontractor. (d) Payroll Records. Contractor shall comply with and be bound by the provisions of Labor Code Section 1776, which requires Contractor and each subcontractor to: keep accurate payroll records and verify such records in writing under penalty of perjury, as specified in Section 1776; certify and make such payroll records available for inspection as provided by Section 1776; and inform the City of the location of the records.
(e) Apprentices. Contractor shall comply with and be bound by the provisions of Labor Code Sections 1777.5, 1777.6, and 1777.7 and California Code of Regulations Title 8, Section 200 et seq. concerning the employment of apprentices on public works projects. Contractor shall be responsible for
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 3 compliance with these aforementioned Sections for all apprenticeable occupations. Prior to commencing work under this Agreement, Contractor shall provide City with a copy of the information submitted to any applicable apprenticeship program. Within sixty (60) days after concluding work pursuant to this Agreement, Contractor and each of its subcontractors shall submit to the City a verified statement of the journeyman and apprentice hours performed under this Agreement. (f) Eight-Hour Work Day. Contractor acknowledges that eight (8) hours labor constitutes a legal day's work. Contractor shall comply with and be bound by Labor Code Section 1810. (g) Penalties for Excess Hours. Contractor shall comply with and be bound by the provisions of Labor Code Section 1813 concerning penalties for workers who work excess hours. The Contractor shall, as a penalty to the City, forfeit twenty-five dollars ($25) for each worker employed in the performance of this Agreement by the Contractor or by any subcontractor for each calendar day during which such worker is required or permitted to work more than eight (8) hours in any one calendar day and forty (40) hours in any one calendar week in violation of the provisions of Division 2, Part 7, Chapter 1, Article 3 of the Labor Code. Pursuant to Labor Code section 1815, work performed by employees of Contractor in excess of eight (8) hours per day, and forty (40) hours during any one week shall be permitted upon public work upon compensation for all hours worked in excess of 8 hours per day at not less than one and one-half (1½) times the basic rate of pay.
(h) Workers’ Compensation. California Labor Code Sections 1860 and 3700 provide that every employer will be required to secure the payment of compensation to its employees if it has employees. In accordance with the provisions of California Labor Code Section 1861, Contractor certifies as follows:
“I am aware of the provisions of Section 3700 of the Labor Code which require every employer to be insured against liability for workers' compensation or to undertake selfinsurance in accordance with the provisions of that code, and I will comply with such provisions before commencing the performance of the work of this contract.” Contractor’s Authorized Initials ___________________
Kirt Coury, Vice President
(i) Contractor’s Responsibility for Subcontractors. For every subcontractor who will perform work under this Agreement, Contractor shall be responsible for such subcontractor's compliance with Division 2, Part 7, Chapter 1 (commencing with Section 1720) of the California Labor Code, and shall make such compliance a requirement in any contract with any subcontractor for work under this Agreement.
Contractor shall be required to take all actions necessary to enforce such contractual provisions and ensure subcontractor's compliance, including without limitation, conducting a review of the certified payroll records of the subcontractor on a periodic basis or upon becoming aware of the failure of the subcontractor to pay his or her workers the specified prevailing rate of wages. Contractor shall diligently take corrective action to halt or rectify any such failure by any subcontractor.
1.5 Licenses, Permits, Fees and Assessments.
Contractor shall obtain at its sole cost and expense such licenses, permits and approvals as may be required by law for the performance of the services required by this Agreement. Contractor shall have the sole obligation to pay for any fees, assessments and taxes, plus applicable penalties and interest, which may be imposed by law and arise from or are necessary for Contractor’s performance of the services required
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 4 by this Agreement, and shall indemnify, defend and hold harmless City against any such fees, assessments, taxes, penalties or interest levied, assessed or imposed against City hereunder.
1.6 Familiarity with Work.
By executing this Agreement, Contractor represents and warrants Contractor: a) has thoroughly investigated and considered services to be performed, b) has carefully considered how services should be performed, and c) fully understands the facilities, difficulties and restrictions attending performance of services under this Agreement. If the services involve work upon any site, Contractr warrants that Contractor has or will investigate the site and is or will be fully acquainted with the conditions there existing, prior to commencement of services hereunder. Should the Contractor discover any latent or unknown conditions, which will materially affect the performance of the services hereunder, Contractor shall immediately inform the City of such fact and shall not proceed except at Contractor’s risk until written instructions are received from the Contract Officer.
1.7 Software and Computer Services.
If the Scope of Services includes the provision and/or installation of any software, computer system, or other computer technology, Contractor represents and warrants that it is familiar with and/or has inspected City’s current infrastructure, equipment, computer system and software and that the software, computer system, or other computer technology provided and/or installed by Contractor under this Agreement is compatible, and shall be fully functional, with such infrastructure, equipment, computer system and software of City. Contractor acknowledges that City is relying on this representation by Contractor as a material consideration in entering into this Agreement.
1.8 Care of Work.
Contractor shall adopt reasonable methods during the life of this Agreement to furnish continuous protection to the work, and the equipment, materials, papers, documents, plans, studies and/or other components thereof to prevent losses or damages, and shall be responsible for all such damages, to persons or property, until acceptance of the work by City, except such losses or damages as may be caused by City’s own negligence.
1.9 Further Responsibilities of Parties.
Both Parties agree to use reasonable care and diligence to perform their respective obligations under this Agreement. Both Parties agree to act in good faith to execute all instruments, prepare all documents and take all actions as may be reasonably necessary to carry out the purposes of this Agreement. Unless hereafter specified, neither Party shall be responsible for the service of the other.
1.10 Additional Services.
City shall have the right at any time during the performance of the services, without invalidating this Agreement, to order extra work beyond that specified in the Scope of Services or make changes by altering, adding to or deducting from said work. No such extra work may be undertaken unless a written order is first given by the Contract Officer (as defined below) to the Contractor, incorporating therein any adjustment in (i) the Contract Sum (or a portion of the compensation due to Contractor) for the actual costs of the extra work, and/or (ii) the time to perform this Agreement, which said adjustments are subject to the written approval of the Contractor. Any increase in compensation of up to ten percent (10%) of the Contract Sum or $25,000, whichever is less; or, in the time to perform of up to one hundred eighty (180) days, may
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 5 be approved by the Contract Officer. Any greater increases, taken either separately or cumulatively, must be approved by the City Council. It is expressly understood by Contractor that the provisions of this Section shall not apply to services specifically set forth in the Scope of Services. Contractor hereby acknowledges that it accepts the risk that the services to be provided pursuant to the Scope of Services may be more costly or time consuming than Contractor anticipates and that Contractor shall not be entitled to additional compensation therefor. City may in its sole and absolute discretion have similar work done by other contractors / consultants. No claims for an increase in the Contract Sum or time for performance shall be valid unless the procedures established in this Section are followed.
1.11 Contract Modifications.
Additional terms and conditions of this Agreement, if any, or any modifications or revisions to the standard terms and conditions herein are made a part hereof as set forth in the “Contract Modifications” attached hereto as Exhibit “B” and incorporated herein by this reference. In the event of a conflict between the provisions of Exhibit “B” and any other provisions of this Agreement, the provisions of Exhibit “B” shall govern.
1.12 Campaign Contributions
This Agreement is subject to Government Code section 84308 (commonly known as the Levine Act), as amended by Senate Bill 1439 (2022), Senate Bill 1181 (2024), and Senate Bill 1243 (2024); unless the contract is (1) competitively bid; (2) under $50,000; (3) amendments valued at more than 10 percent of the value of the contract or fifty thousand dollars ($50,000), whichever is less; and (4) labor contracts, in which case this provision does not apply. Contractor shall disclose any contribution to an elected or appointed City official’s campaign or committee in an amount of more than five hundred dollars ($500) made within 12 months preceding the Commencement Date, by Contractor, its, her, or his agent, or another party affiliated with Contractor. Contractor shall provide a signed copy of the attached Campaign Contribution Disclosure Form to City prior to, or concurrent with, Contractor's execution of this Agreement and no later than the Commencement Date.
ARTICLE 2. COMPENSATION AND METHOD OF PAYMENT.
2.1 Contract Sum.
Subject to any limitations set forth in this Agreement, City agrees to pay Consultant the amounts specified in the “Schedule of Compensation” attached hereto as Exhibit “C” and incorporated herein by this reference. The total compensation, including reimbursement for actual expenses, shall not exceed Twenty Thousand Dollars ($20,000) (the “Contract Sum”), unless additional compensation is approved pursuant to Section 1.8.
2.2 Reimbursable Expenses.
Compensation may include reimbursement for actual and necessary expenditures for reproduction costs, telephone expenses, and travel expenses approved by the Contract Officer in advance, or actual subcontractor expenses of an approved subcontractor pursuant to Section 4.5, and only if specified in the Schedule of Compensation. The Contract Sum shall include the attendance of Contractor at all project meetings reasonably deemed necessary by the City. Coordination of the performance of the work with City is a critical component of the services. If Contractor is required to attend additional meetings to facilitate such coordination, Contractor shall not be entitled to any additional compensation for attending said meetings.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 6
2.3 Invoices.
In any month in which Contractor wishes to receive payment, no later than the first business day of such month, Contractor shall submit to City, in a form approved by City’s Finance Director, an invoice for services rendered prior to the date of the invoice. By submitting an invoice for payment under this Agreement, Contractor is certifying compliance with all provisions of this Agreement. Except as provided in Sections 7.3, 7.4 and 7.5, City shall pay Contractor for all expenses stated thereon which are approved by City pursuant to this Agreement generally within thirty (30) days, and City will use its best efforts to make payment no later than forty-five (45) days, from the submission of an invoice in an approved form.
In the event any charges or expenses are disputed by City, the original invoice shall be returned by City to Contractor for correction and resubmission. Review and payment by City for any invoice provided by Contractor shall not constitute a waiver of any rights or remedies provided herein or any applicable law.
Each invoice is to include (unless otherwise specified by City): 1) line items for all personnel describing the work performed, the number of hours worked, and the hourly rate; 2) line items for all materials and equipment properly charged to the Services; 3) line items for all other approved reimbursable expenses claimed, with supporting documentation; and 4) line items for all approved subcontractor labor, supplies, equipment, materials, and travel properly charged to the Services.
2.4 Waiver.
Payment to Contractor for work performed pursuant to this Agreement shall not be deemed to waive any defects in work performed by Contractor.
ARTICLE 3. PERFORMANCE SCHEDULE
3.1 Time of Essence.
Time is of the essence in the performance of this Agreement.
3.2 Term.
Unless earlier terminated in accordance with Article 7 of this Agreement, this Agreement shall continue in full force and effect until completion of the services but not exceeding three (3) years from the date hereof (“Term”), except as otherwise provided in the Schedule of Performance (as shown on Exhibit “D” attached hereto). The City Manager may extend the Term up to one (1) additional one-year terms subject to City Council approval.
3.3 Schedule of Performance.
Contractor shall commence the services pursuant to this Agreement upon receipt of a written notice to proceed and shall perform all services within the time period(s) established in the Task Order and “Schedule of Performance” attached hereto as Exhibit “D” and incorporated herein by this reference. When requested by the Contractor, extensions to the time period(s) specified in the Schedule of Performance may be approved in writing by the Contract Officer but not exceeding one hundred eighty (180) days cumulatively.
3.4 Force Majeure.
The time period(s) specified in the Schedule of Performance for performance of the services rendered pursuant to this Agreement shall be extended because of any delays due to unforeseeable causes beyond the control and without the fault or negligence of the Contractor, including, but not restricted to,
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 7 acts of God or of the public enemy, unusually severe weather, fires, earthquakes, floods, epidemics, quarantine restrictions, riots, strikes, freight embargoes, wars, litigation, and/or acts of any governmental agency, including the City, if the Contractor shall within ten (10) days of the commencement of such delay notify the Contract Officer in writing of the causes of the delay. The Contract Officer shall ascertain the facts and the extent of delay, and extend the time for performing the services for the period of the enforced delay when and if in the judgment of the Contract Officer such delay is justified. The Contract Officer’s determination shall be final and conclusive upon the Parties to this Agreement. In no event shall Contractor be entitled to recover damages against the City for any delay in the performance of this Agreement, however caused, Contractor’s sole remedy being extension of the Term of this Agreement pursuant to this Section.
ARTICLE 4. COORDINATION OF WORK
4.1 Representatives and Personnel of Contractor.
The following principals of Contractor (“Principals”) are hereby designated as being the principals and representatives of Contractor authorized to act in its behalf with respect to the work specified herein and make all decisions in connection therewith:
Thomas G. Merrell, President
Kirt A. Coury Vice President
The Contractor Representative is authorized to act on Contractor’s behalf with respect to the work or services specified herein and to make all decisions in connection therewith. It is expressly understood that the experience, knowledge, capability and reputation of the representative was a substantial inducement for City to enter into this Agreement. Therefore, the representative shall be responsible during the term of this Agreement for directing all activities of Contractor and devoting sufficient time to personally supervise the services hereunder. For purposes of this Agreement, the representative may not be replaced nor may their responsibilities be substantially reduced by Contractor without the express written approval of City.
4.2 Status of Contractor.
Contractor shall have no authority to bind City in any manner, or to incur any obligation, debt or liability of any kind on behalf of or against City, whether by contract or otherwise, unless such authority is expressly conferred under this Agreement or is otherwise expressly conferred in writing by City. Contractor shall not at any time or in any manner represent that Contractor or any of Contractor’s officers, employees, or agents are in any manner officials, officers, employees or agents of City. Neither Contractor, nor any of Contractor’s officers, employees or agents, shall obtain any rights to retirement, health care or any other benefits which may otherwise accrue to City’s employees. Contractor expressly waives any claim Contractor may have to any such rights.
4.3 Contract Officer.
The Contract Officer shall be Konrad Bolowich or such person as may be designated by the City Manager. For any project awarded by a Task Order under this Agreement, City will designate a project manager who shall oversee Contractor’s performance of the awarded services. It shall be the Contractor’s responsibility to assure that the Contract Officer is kept informed of the progress of the performance of the services and the Contractor shall refer any decisions which must be made by City to the Contract Officer.
Unless otherwise specified herein, any approval of City required hereunder shall mean the approval of the Contract Officer. The Contract Officer shall have authority, if specified in writing by the City Manager, to sign all documents on behalf of the City required hereunder to carry out the terms of this Agreement.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 8
4.4 Independent Contractor.
Neither City, nor any of its officers, employees or agents, shall have any control over the manner or means by which Contractor, or its officers, employees, agents or subcontractors, perform the services required herein, except as otherwise set forth herein. Contractor shall perform all services required herein as an independent contractor of City and shall remain under only such obligations as are consistent with that role. Contractor shall not at any time or in any manner represent that it, or any of its officers, employees, agents or subcontractors, are officers, employees or agents of City. City shall not in any way or for any purpose become or be deemed to be a partner of Contractor in its business or otherwise or a joint venturer or a member of any joint enterprise with Contractor. Contractor shall not incur or have the power to incur any debt, obligation or liability whatever against City, or bind City in any manner. Contractor represents and warrants that the personnel used to provide services to City pursuant to this Agreement shall at all times be under Contractor’s exclusive control and direction. No City employee benefits shall be available to Contractor, its officers, employees, agents or subcontractors, in connection with the performance of this Agreement. City shall not be liable for compensation or indemnification to Contractor, its officers, employees, agents or subcontractors, for injury or sickness arising out of performing services hereunder.
4.5 Prohibition Against Subcontracting or Assignment.
The experience, knowledge, capability and reputation of Contractor, its principals and employees were a substantial inducement for City to enter into this Agreement. Therefore, without express written approval of City, Contractor shall not contract with any other entity to perform in whole or in part services required hereunder without express written approval of City, and neither this Agreement nor any interest herein may be transferred or assigned. No approved transfer shall release Contractor, or any surety or insured of Contractor, of any liability hereunder without express written consent of City.
ARTICLE 5. INSURANCE AND INDEMNIFICATION
5.1 Insurance Coverages.
Prior to commencement of any services under this Agreement, and without limiting Contractor’s indemnification obligation to City, Contractor shall procure and maintain, at its sole cost and expense, in a form and content satisfactory to City, for the duration of the Agreement, primary policies of insurance of the type and amounts set forth in the “Insurance Requirements” attached hereto as Exhibit “E” and incorporated herein by this reference.
5.2 Indemnification.
(a) General Obligations. Contractor agrees, to the full extent permitted by law, to indemnify, defend and hold harmless City and its elected and appointed officers, employees and agents (each an “Indemnitee” and collectively, “Indemnitees”) against, and will hold and save them and each of them harmless from, whether actual or threatened, any and all actions, either judicial, administrative, arbitration or regulatory claims, damages to persons or property, losses, costs, penalties, obligations, errors, omissions or liabilities (herein “Claims or Liabilities”) that may be asserted or claimed by any person, firm or agency arising out of or in connection with the performance of the work, operations or activities provided herein of Contractor, its officers, employees, agents, subcontractors, or invitees, or any individual or City for which Contractor is legally liable (each an “Indemnitor” and collectively, “Indemnitors”), and in connection therewith: 1) Contractor will defend any action or actions filed or threatened in connection with any such Claims or Liabilities, or at
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 9 option of Indemnitee(s) will reimburse and pay for all costs and expenses, including legal costs and attorneys’ fees, incurred by Indemnitee(s) in connection therewith; and, 2) Contractor will promptly pay any judgment rendered against Indemnitee(s) for any such Claims or Liabilities, and will save and hold Indemnitee(s) harmless therefrom.
Further Provisions. The indemnity obligation herein shall be binding on successors, assigns and heirs of Contractor and shall survive termination of this Agreement. Contractor shall incorporate similar indemnity agreements as provided herein with its subcontractors, and if Contractor fails to do so Contractor shall be fully responsible to indemnify City hereunder therefor. Failure of City and/or City Parties (collectively “City” for solely this Section 5.2(b)) to monitor compliance with any of the indemnification provisions herein shall not be a waiver hereof. Payment of invoices by City is not a condition precedent to enforcement of the indemnity obligation herein. In the event of any dispute between Contractor and City, as to whether liability arises from the sole negligence or willful misconduct of City, Contractor will be obligated to pay for City’s defense until such time as a final judgment has been entered adjudicating City as solely negligent or responsible for willful misconduct.
Contractor will not be entitled in the absence of such a determination to any reimbursement of defense costs including but not limited to attorney’s fees, expert fees and costs of litigation.
ARTICLE 6. RECORDS, REPORTS, AND RELEASE OF INFORMATION
6.1 Records.
Contractor shall keep, and require subcontractors to keep, such ledgers, books of accounts, invoices, vouchers, canceled checks, reports, studies or other documents relating to the disbursements charged to City and services performed hereunder (“books and records”) as shall be necessary to perform the services required by this Agreement and enable City to evaluate the performance of such services. Any and all such books and records shall be maintained in accordance with generally accepted accounting principles, shall be complete and detailed, and shall be readily accessible. City shall have full and free access to such books and records at all times during normal business hours of City, including the right to inspect, copy, audit and make records and transcripts. Such books and records shall be maintained for a period of three (3) years following completion of the services hereunder. City shall have access to such books and records in the event any audit is required. Contractor shall fully cooperate with City in providing access to any and all Contractor records and documents if a public records request is made and disclosure is required by law including but not limited to the California Public Records Act.
6.2 Reports.
Contractor shall periodically prepare and submit to the Contract Officer such reports concerning the performance of the services required by this Agreement as the Contract Officer shall require. Contractor hereby acknowledges that the City is greatly concerned about the cost of work and services to be performed pursuant to this Agreement. For this reason, Contractor agrees that if Contractor becomes aware of any facts, circumstances, techniques, or events that may or will materially increase or decrease the cost of the work or services contemplated herein or, if Contractor is providing design services, the cost of the project being designed, Contractor shall promptly notify the Contract Officer of said fact, circumstance, technique or event and the estimated increased or decreased cost related thereto and, if Contractor is providing design services, the estimated increased or decreased cost estimate for the project being designed.
6.3 Ownership of Documents.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 10 All drawings, specifications, maps, designs, photographs, studies, surveys, data, notes, computer files, reports, records, documents and other materials (“documents and materials”) prepared by Contractor, its officers, employees, agents and subcontractors in the performance of this Agreement shall be the property of City and shall be delivered to City upon request of City and/or upon the termination of this Agreement, and Contractor shall have no claim for further employment or additional compensation as a result of the exercise by City of its full rights of ownership, use, reuse, or assignment of the documents and materials hereunder. Contractor may retain copies of such documents and materials for its own use.
Contractor shall have the right to use the concepts embodied therein. All subcontractors shall provide for assignment to City of any documents and materials prepared by them, and in the event Contractor fails to secure such assignment, Contractor shall indemnify City for all damages resulting therefrom. Moreover, with respect to any Contractor documents and materials that may qualify as “works made for hire” as defined in 17 U.S.C. § 101, such documents and materials are hereby deemed “works made for hire” for City.
6.4 Confidentiality and Release of Information.
(a) All information gained or work product produced by Contractor in its performance of this Agreement shall be considered confidential, unless such information is in the public domain or already known to Contractor. Contractor shall not release or disclose any such information or work product to persons or entities other than City without prior written authorization from City. (b) Contractor, its officers, employees, agents or subcontractors, shall not, without prior written authorization from City or unless requested by the City Attorney, voluntarily provide documents, declarations, letters of support, testimony at depositions, response to interrogatories or other information concerning the work performed under this Agreement. Response to a subpoena or court order shall not be considered “voluntary” provided Contractor immediately gives City notice of such court order or subpoena. (c) If Contractor, or any officer, employee, agent or subcontractor of Contractor, provides any information or work product in violation of this Agreement, then City shall have the right to reimbursement and indemnity from Contractor for any damages, costs and fees, including attorney’s fees, caused by or incurred as a result of Contractor’s conduct. (d) As concerning, regarding or related to, in any way, this Agreement and the work performed thereunder: i) Contractor shall immediately notify City should Contractor, its officers, employees, agents or subcontractors be served with any summons, complaint, subpoena, notice of deposition, request for documents, interrogatories, request for admissions or other discovery request, court order or subpoena from any party; ii) City retains the right, but has no obligation, to represent Contractor or be present at any deposition, hearing or similar proceeding; and, iii) Contractor agrees to cooperate fully with City and to provide City with the opportunity to review any response to discovery requests provided by Contractor, however, this right to review any such response does not imply or mean the right by City to control, direct, or rewrite said response.
ARTICLE 7. ENFORCEMENT OF AGREEMENT AND TERMINATION
7.1 California Law.
This Agreement shall be interpreted, construed and governed both as to validity and to performance of the Parties in accordance with the laws of the State of California. Legal actions concerning any dispute, claim or matter arising out of or in relation to this Agreement shall be instituted in the Superior Court of the County of San Bernardino, State of California, or any other appropriate court in such county, and Contractor
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 11 covenants and agrees to submit to the personal jurisdiction of such court in the event of such action. In the event of litigation in a U.S. District Court, venue shall lie exclusively in the Central District of California, in the County of San Bernardino, State of California.
7.2 Suspension, or Termination, Prior to Expiration of Term.
This Section shall govern any termination of this Agreement except as specifically provided in Section 7.4 for termination for cause. City reserves the right to terminate or suspend this Agreement, or any portion hereof, at any time, for any reason, with or without cause, upon ten (10) days’ notice to Contractor, except that where termination or suspension is due to the fault of Contractor, the period of notice may be such shorter time as determined by City. Upon receipt of any notice of termination or suspension, Contractor shall immediately cease all services hereunder, unless the notice provides otherwise, or except such as specifically approved by City. Upon submittal of an invoice consistent with Section 2.2, Contractor shall be entitled to compensation for all services rendered prior to the effective date of the notice of termination or suspension and for any services authorized by City thereafter in accordance with the any Task Order, or such as may be approved by City, except as provided in Section 7.5. In event of termination, or suspension, without cause pursuant to this Section, there is no need to provide opportunity to cure pursuant to Section 7.3.
7.3 Default of Contractor and Opportunity to Cure.
In the event that Contractor is in default under the terms of this Agreement, City shall not have any obligation or duty to continue compensating Contractor for any work performed after the date of default. Instead, City may give notice to Contractor of the default and the reasons for the default. The notice shall include the timeframe in which Contractor may cure the default. This timeframe is presumptively ten (10) days, but may be extended, or reduced, if circumstances warrant, as determined by City. During the period of time that Contractor is in default, City shall hold all invoices and shall, when the default is cured, proceed with payment on the invoices, without liability for interest. In the alternative, City may, in its sole discretion, elect to pay some or all of the outstanding invoices during the period of default. If Contractor does not cure the default by conclusion of noticed timeframe, City may immediately both terminate this Agreement with notice to Contractor as well as pursue the remedy in Section 7.4, without prejudice to any other remedy to which City may be entitled at law, in equity or under this Agreement. Any failure on the part of City to give notice of Contractor’s default shall not be deemed to result in a waiver of City’s legal rights or any rights arising out of any provision of this Agreement.
7.4 Termination for Default of Contractor.
If termination is due to the failure of Contractor to fulfill its obligations under this Agreement, City may, after compliance with the provisions of Section 7.3, take over the work and prosecute the same to completion by contract or otherwise, and Contractor shall be liable to the extent that the total cost for completion of the services required hereunder exceeds the compensation herein stipulated (provided that City shall use reasonable efforts to mitigate such damages), and City may withhold any payments to Contractor for the purpose of set-off or partial payment of the amounts owed City therefor.
7.5 Retention of Funds.
Contractor hereby authorizes City to deduct from any amount payable to Contractor (whether or not arising out of this Agreement) (i) any amounts the payment of which may be in dispute hereunder or which are necessary to compensate City for any losses, costs, liabilities, or damages suffered by City, and (ii) all amounts for which City may be liable to third parties, by reason of Contractor’s acts or
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 12 omissions in performing or failing to perform Contractor’s obligation under this Agreement. In the event that any claim is made by a third party, the amount or validity of which is disputed by Contractor, or any indebtedness shall exist which shall appear to be the basis for a claim of lien, City may withhold from any payment due, without liability for interest because of such withholding, an amount sufficient to cover such claim. The failure of City to exercise such right to deduct or to withhold shall not, however, affect the obligations of Contractor to insure, indemnify, and protect City as elsewhere provided herein.
7.6 Waiver.
Waiver by any Party to this Agreement of any term, condition, or covenant of this Agreement shall not constitute a waiver of any other term, condition, or covenant. Waiver by any Party of any breach of the provisions of this Agreement shall not constitute a waiver of any other provision or a waiver of any subsequent breach or violation of any provision of this Agreement. Acceptance by City of any work or services by Contractor shall not constitute a waiver of any of the provisions of this Agreement. No delay or omission in the exercise of any right or remedy by a non-defaulting Party on any default shall impair such right or remedy or be construed as a waiver. Any waiver by either Party of any default must be in writing and shall not be a waiver of any other default concerning the same or any other provision of this Agreement.
Contractor acknowledges and agrees that any actual or alleged failure on the part of City to inform Contractor of non-compliance with any requirement of this Agreement imposes no additional obligations on City nor does it waive any rights hereunder. Payment to Contractor for work performed pursuant to this Agreement shall not be deemed to waive any defects in work performed by Contractor.
7.7 Rights and Remedies are Cumulative.
Except with respect to rights and remedies expressly declared to be exclusive in this Agreement, the rights and remedies of the Parties are cumulative and the exercise by either Party of one or more of such rights or remedies shall not preclude the exercise by it, at the same or different times, of any other rights or remedies for the same default or any other default by the other Party.
7.8 Legal Action.
In addition to any other rights or remedies, either Party may take legal action, in law or in equity, to cure, correct or remedy any default, to recover damages for any default, to compel specific performance of this Agreement, to obtain declaratory or injunctive relief, or to obtain any other remedy consistent with the purposes of this Agreement. Notwithstanding any contrary provision herein, Contractor shall file a statutory claim pursuant to Government Code sections 905 et seq. and 910 et seq., in order to pursue a legal action under this Agreement.
7.9 Attorneys’ Fees.
If either Party to this Agreement is required to initiate or defend or made a party to any action or proceeding in any way connected with this Agreement, the prevailing party in such action or proceeding, in addition to any other relief which may be granted, whether legal or equitable, shall be entitled to reasonable attorneys’ fees. Attorneys’ fees shall include attorneys’ fees on any appeal, and a Party entitled to attorneys’ fees shall be entitled to all other reasonable costs for investigating such action, Contractors’ fees, taking depositions and discovery and all other necessary costs the court allows which are incurred in
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 13 such litigation. Such fees and costs shall be enforceable whether or not such action is prosecuted to judgment.
ARTICLE 8. CITY OFFICERS AND EMPLOYEES: NON-DISCRIMINATION
8.1 Non-liability of City Officers and Employees.
No officer or employee of City shall be personally liable to Contractor, or any successor in interest, in the event of any default or breach by City or for any amount which may become due to Contractor or to its successor, or for breach of any obligation of the terms of this Agreement.
8.2 Conflict of Interest.
Contractor covenants that neither it, nor any officer or principal of its firm, has or shall acquire any interest, directly or indirectly, which would conflict in any manner with the interests of City or which would in any way hinder Contractor’s performance of services under this Agreement. Contractor further covenants that in the performance of this Agreement, no person having any such interest shall be employed by it as an officer, employee, agent or subcontractor without the express written consent of the Contract Officer.
Contractor agrees to at all times avoid conflicts of interest or the appearance of any conflicts of interest with the interests of City in the performance of this Agreement.
No officer or employee of the City shall have any financial interest, direct or indirect, in this Agreement nor shall any such officer or employee participate in any decision relating to this Agreement which affects her/his financial interest or the financial interest of any corporation, partnership or association in which (s)he is, directly or indirectly, interested, in violation of any State statute or regulation. The Contractor warrants that it has not paid or given and will not pay or give any third party any money or other consideration for obtaining this Agreement.
8.3 Covenant Against Discrimination.
Contractor covenants that, by and for itself, its heirs, executors, assigns, and all persons claiming under or through them, that there shall be no discrimination against or segregation of, any person or group of persons on account of race, color, creed, religion, sex, gender, sexual orientation, marital status, national origin, ancestry or other protected class in the performance of this Agreement. Contractor shall take affirmative action to insure that applicants are employed and that employees are treated during employment without regard to their race, color, creed, religion, sex, gender, sexual orientation, marital status, national origin, ancestry or other protected class.
8.4 Unauthorized Aliens.
Contractor hereby promises and agrees to comply with all of the provisions of the Federal Immigration and Nationality Act, 8 U.S.C. § 1101 et seq., as amended, and in connection therewith, shall not employ unauthorized aliens as defined therein. Should Contractor so employ such unauthorized aliens for the performance of work and/or services covered by this Agreement, and should any liability or sanctions be imposed against City for such use of unauthorized aliens, Contractor hereby agrees to and shall reimburse City for the cost of all such liabilities or sanctions imposed, together with any and all costs, including attorneys’ fees, incurred by City.
ARTICLE 9. MISCELLANEOUS PROVISIONS
9.1 Notices.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 14 Any notice, demand, request, document, consent, approval, or communication either Party desires or is required to give to the other Party or any other person shall be in writing and either served personally or sent by prepaid, first-class mail, in the case of the City, to the City Manager and to the attention of the Contract Officer (with her/his name and City title), City of Grand Terrace, 22795 Barton Rd., Grand Terrace, California 92313, and in the case of the Contractor, to the person(s) at the address designated on the execution page of this Agreement. Either Party may change its address by notifying the other Party of the change of address in writing. Notice shall be deemed communicated at the time personally delivered or in seventy-two (72) hours from the time of mailing if mailed as provided in this Section.
9.2 Interpretation.
The terms of this Agreement shall be construed in accordance with the meaning of the language used and shall not be construed for or against either Party by reason of the authorship of this Agreement or any other rule of construction which might otherwise apply.
9.3 Counterparts and Electronic Signatures.
This Agreement may be executed in two or more counterparts, each of which when so executed shall be deemed to be an original and all of which when taken together shall constitute one and the same instrument. The words “execution,” “signed,” “signature,” and words of like import in this Agreement or in any other certificate, agreement or document related to this Agreement, shall include images of manually executed signatures transmitted by facsimile or other electronic format (including, without limitation, “pdf”, “tif” or “jpg”) and other electronic signatures in accordance with California Code of Regulations Title 2 Section 22003 (including, without limitation, DocuSign and AdobeSign). The use of electronic signatures and electronic records (including, without limitation, any contract or other record created, generated, sent, communicated, received, or stored by electronic means) shall be of the same legal effect, validity and enforceability as a manually executed signature or use of a paper-based record-keeping system to the fullest extent permitted by applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the California Uniform Electronic Transactions Act and any other applicable law, including, without limitation, any state law based on the Uniform Electronic Transactions Act or the Uniform Commercial Code.
9.4 Integration; Amendment.
This Agreement including the attachments hereto is the entire, complete and exclusive expression of the understanding of the Parties. It is understood that there are no oral agreements between the Parties hereto affecting this Agreement and this Agreement supersedes and cancels any and all previous negotiations, arrangements, agreements and understandings, if any, between the Parties, and none shall be used to interpret this Agreement. No amendment to or modification of this Agreement shall be valid unless made in writing and approved by the Contractor and by the City Council. The Parties agree that this requirement for written modifications cannot be waived and that any attempted waiver shall be void.
9.5 Severability.
In the event that any one or more of the phrases, sentences, clauses, paragraphs, or sections contained in this Agreement shall be declared invalid or unenforceable by a valid judgment or decree of a court of competent jurisdiction, such invalidity or unenforceability shall not affect any of the remaining phrases, sentences, clauses, paragraphs, or sections of this Agreement which are hereby declared as severable and shall be interpreted to carry out the intent of the Parties hereunder unless the invalid provision is so material
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 15 that its invalidity deprives either Party of the basic benefit of their bargain or renders this Agreement meaningless.
9.6 Warranty & Representation of Non-Collusion.
No official, officer, or employee of City has any financial interest, direct or indirect, in this Agreement, nor shall any official, officer, or employee of City participate in any decision relating to this Agreement which may affect his/her financial interest or the financial interest of any corporation, partnership, or association in which (s)he is directly or indirectly interested, or in violation of any corporation, partnership, or association in which (s)he is directly or indirectly interested, or in violation of any State or municipal statute or regulation. The determination of “financial interest” shall be consistent with State law and shall not include interests found to be “remote” or “noninterests” pursuant to Government Code Sections 1091 or 1091.5. Contractor warrants and represents that it has not paid or given, and will not pay or give, to any third party including, but not limited to, any City official, officer, or employee, any money, consideration, or other thing of value as a result or consequence of obtaining or being awarded any agreement. Contractor further warrants and represents that (s)he/it has not engaged in any act(s), omission(s), or other conduct or collusion that would result in the payment of any money, consideration, or other thing of value to any third party including, but not limited to, any City official, officer, or employee, as a result of consequence of obtaining or being awarded any agreement. Contractor is aware of and understands that any such act(s), omission(s) or other conduct resulting in such payment of money, consideration, or other thing of value will render this Agreement void and of no force or effect.
Contractor’s Authorized Initials ___________________
Thomas G. Merrell
9.7 Corporate Authority.
The persons executing this Agreement on behalf of the Parties hereto warrant that (i) such Party is duly organized and existing, (ii) they are duly authorized to execute and deliver this Agreement on behalf of said Party, (iii) by so executing this Agreement, such Party is formally bound to the provisions of this Agreement, and (iv) that entering into this Agreement does not violate any provision of any other agreement to which said Party is bound. This Agreement shall be binding upon the heirs, executors, administrators, successors and assigns of the Parties.
[SIGNATURES ON FOLLOWING PAGE]
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 16 IN WITNESS WHEREOF, the Parties hereto have executed this Agreement on the date and year first-above written.
CITY:
CITY OF GRAND TERRACE, a municipal corporation
By:
_______________________________________________
Konrad Bolowich
City Manager
APPROVED AS TO FORM:
ALESHIRE & WYNDER, LLP
By:
_____________________________________
Adrian R. Guerra
City Attorney
ATTEST:
By:
_____________________________________
Daysi Alcocer
City Clerk
CONTRACTOR:
Civic Solutions, Inc.
By:
_____________________________________
Name: Thomas G. Merrell
Title: President
Email: [email protected]
Address: 111 Corporate Drive, Suite 120
Ladera Ranch, CA 92694
By:
_______________________________________________
Name: Kirt A. Coury
Title: Vice President
Email: [email protected]
Address: 111 Corporate Drive, Suite 120
Ladera Ranch, CA 92694
Two corporate officer signatures required when Contractor is a corporation, with one signature required from each of the following groups: 1) Chairman of the Board, President or any Vice President; and 2) Secretary, any Assistant Secretary, Chief Financial Officer or any Assistant Treasurer. CONTRACTOR’S
SIGNATURES SHALL BE DULY NOTARIZED UNLESS EXECUTED UTILIZING DIGITAL SIGNATURE IN ACCORDANCE WITH CALIFORNIA CODE OF REGULATIONS TITLE 2 SECTION 22003. IN ADDITION, THE APPROPRIATE ATTESTATIONS SHALL BE INCLUDED AS MAY BE REQUIRED BY THE BYLAWS, ARTICLES OF INCORPORATION, OR OTHER RULES OR REGULATIONS APPLICABLE TO CONTRACTOR’S BUSINESS ENTITY.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 17
CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT
STATE OF CALIFORNIA
COUNTY OF SAN BERNARDINO
On __________, 2026 before me, ________________, personally appeared ________________, proved to me on the basis of satisfactory evidence to be the person(s) whose names(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct.
WITNESS my hand and official seal.
Signature: _____________________________________
OPTIONAL
Though the data below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent reattachment of this form
CAPACITY CLAIMED BY SIGNER DESCRIPTION OF ATTACHED DOCUMENT
INDIVIDUAL
CORPORATE OFFICER
_______________________________
TITLE(S)
PARTNER(S) LIMITED
GENERAL
ATTORNEY-IN-FACT
TRUSTEE(S)
GUARDIAN/CONSERVATOR
OTHER_______________________________
______________________________________
SIGNER IS REPRESENTING:
(NAME OF PERSON(S) OR ENTITY(IES))
_____________________________________________
_____________________________________________
___________________________________
TITLE OR TYPE OF DOCUMENT
___________________________________
NUMBER OF PAGES
___________________________________
DATE OF DOCUMENT
___________________________________
SIGNER(S) OTHER THAN NAMED ABOVE
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy or validity of that document.
01247.0001 2074783.1 12/22/2025 On-Call Agreement – Vendor Name (Project Name) Council Date 18
CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT
STATE OF CALIFORNIA
COUNTY OF SAN BERNARDINO
On __________, 2026 before me, ________________, personally appeared ________________, proved to me on the basis of satisfactory evidence to be the person(s) whose names(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct.
WITNESS my hand and official seal.
Signature: _____________________________________
OPTIONAL
Though the data below is not required by law, it may prove valuable to persons relying on the document and could prevent fraudulent reattachment of this form.
CAPACITY CLAIMED BY SIGNER DESCRIPTION OF ATTACHED DOCUMENT
INDIVIDUAL
CORPORATE OFFICER
_______________________________
TITLE(S)
PARTNER(S) LIMITED
GENERAL
ATTORNEY-IN-FACT
TRUSTEE(S)
GUARDIAN/CONSERVATOR
OTHER_______________________________
______________________________________
SIGNER IS REPRESENTING:
(NAME OF PERSON(S) OR ENTITY(IES))
_____________________________________________
_____________________________________________
___________________________________
TITLE OR TYPE OF DOCUMENT
___________________________________
NUMBER OF PAGES
___________________________________
DATE OF DOCUMENT
___________________________________
SIGNER(S) OTHER THAN NAMED ABOVE
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the document to which this certificate is attached, and not the truthfulness, accuracy or validity of that document.
EXHIBIT “A”
SCOPE OF SERVICES
I. Contractor will perform the following Services on an On-Call basis:
A. Planning Services: Selected consultants for Planning Services shall have demonstrated expertise in processing applications for various types of projects including, but not limited to, residential, commercial, industrial, institutional, mixed-use, and transit-oriented development projects.
Services may include projects requiring General Plan Amendments, Zone Changes, Specific Plan Amendments, Development Agreements, Objective Design Standards, and other legislative or discretionary actions. Typical Planning Services tasks include, but are not limited to, the following:
I. Initial project and site assessment;
II. Review projects for completeness and compliance with the General Plan, Zoning Ordinance, Specific Plans, Objective Design Standards, and all applicable codes and ordinances;
III. Prepare correspondence and project review letters for City review; IV. Attend Development Advisory Board meetings and other project coordination meetings;
V. Coordinate comments from City departments and reviewing agencies; VI. Meet with applicants and their representatives;
VII. Coordinate project review with environmental review requirements; VIII. Prepare public hearing notices, staff reports, resolutions, ordinances, findings, and conditionsof approval;
IX. Attend and present projects at Planning Commission and City Council meetings; X. Maintain project files and records related to assigned projects; XI. Conduct plan check review of projects, including but not limited to site plans, architectural plans, grading plans, landscape and irrigation plans, lighting plans, and other related documents for consistency with project approvals and applicable regulations;
XII. Provide staff augmentation services, including counter support and assistance with development application processing;
XIII. Prepare and review zoning verifications, development standards analyses, and entitlement determinations; and
XIV. Provide long-range planning assistance, including General Plan updates, Housing Element implementation programs, zoning code amendments, Specific Plans, and related planning initiatives.
B. Environmental Review Services. Selected consultants for Environmental Review Services shall have demonstrated expertise in preparing environmental review documents as required by CEQA that include, but not limited to, one or more of the following environmental review tasks:
I. Air quality analyses;
II. Greenhouse gas emissions analyses;
III. Noise studies;
IV. Transportation analyses and vehicle miles traveled (VMT) analyses; V. Water quality and stormwater analyses;
VI. Biological resources assessments and studies;
VII. Cultural resources assessments and studies, including AB 52 and SB 18 consultation support;
VIII. Preparation and peer review of technical studies; IX. Preparation of environmental documents, mitigation measures, findings, and mitigation monitoring and reporting programs;
X. Preparation and distribution of required environmental notices and filings; XI. Coordination with responsible agencies, trustee agencies, and other regulatory agencies;
XII. Presentation of environmental analyses and findings at public meetings and hearings; and
XIII. Coordination of environmental review with project entitlement processing.
C. Staff Augmentation with AB 18 and AB 52 Consultation D. Prepare scope of work, budget, and schedule for assigned projects, to include project coordination meetings with City Staff and applicant and all public meetings and hearings.
E. Coordination with applicable agencies, including San Bernardino County Departments, CalTrans, SCAQMD, Department of Fish and Wildlife, and any other regulatory or advisory agencies related to project processing.
II. As part of the Services, Consultant will prepare and deliver the following tangible work products to the City:
A. Work products and timelines based on agreed upon scope of work for assigned projects.
III. In addition to the requirements of Section 6.2, during performance of the Services, Consultant will keep the City appraised of the status of performance by delivering the following status reports:
A. Work products and timelines based on agreed upon scope of work for assigned projects.
IV. Consultant shall utilize qualified personnel with appropriate experience and expertise to perform the Services described herein. Consultant may substitute personnel as necessary, subject to approval by the City, provided that any replacement personnel possess qualifications substantially similar to those of the individuals originally proposed.
EXHIBIT “B”
CONTRACT MODIFICATIONS
(Superseding Contract Boilerplate)
Added text is indicated in bold italics, deleted text is indicated in strikethrough.
EXHIBIT “C”
SCHEDULE OF COMPENSATION
I. Consultant shall perform the on-call services at the rates listed in Exhibit "C-1." The rates provided in Exhibit "C-1" may not be escalated during the term of this Agreement unless otherwise approved by the City through a written amendment to this Agreement.
Consultant shall be compensated based upon the time and rates of the personnel performing the tasks and itemizing materials and equipment utilized and the costs thereof, which shall conform to the requirements provided in Exhibit "A."
II. The City shall compensate Consultant for Services performed upon submission of a valid invoice.
Each invoice shall identify the applicable project and task order and shall include sufficient detail to support the charges invoiced. At a minimum, each invoice shall include:
A. Line items for all personnel describing the work performed, the number of hours worked, and the applicable hourly rate;
B. Line items for all materials and equipment properly charged to the Services; C. Line items for all approved reimbursable expenses claimed, with supporting documentation; and
D. Line items for all approved subconsultant labor, supplies, equipment, materials, and travel properly charged to the Services.
III. The total compensation for the Services shall be as follows:
A. Applicant-Funded Projects. For Services associated with private development projects, the maximum amount of compensation shall be established through a project-specific scope of work, budget, and reimbursement agreement between the City and the applicant.
Consultant shall not commence work until the City has issued a written Notice to Proceed.
B. City-Initiated Projects. For Services associated with City-initiated projects, there shall be a maximum total compensation of $20,000 during the term of this Agreement, unless additional compensation is authorized in accordance with this Agreement.
EXHIBIT “C-1”
CONTRACTOR BILLING RATES
Proposal to Provide On-Call Planning and Environmental Services for Grand Terrace April 23, 2026 w page 25 F. Fee Schedule
Civic Solutions
Position Hourly Rate
Principal-In-Charge
Principal Planner
Senior Planner
Associate Planner
Assistant Planner
Planning Technician
Graphic Designer
Document Processing
$220
$190
$180
$155
$135
$125
$100
$105
HELIX Environmental Planning
Position Hourly Rate
Archaeological Field Technician
Architectural Historian
Assistant Archaeological Field Director
Assistant Biologist
Assistant Biology Project Manager
Biologist I
Biologist II
Biologist III
Biologist IV
Biologist V
Biology Project Manager
Clerical
Cultural Resources Assistant PM
Cultural Resources PM II
Director of Operations
Environmental Compliance Program Specialist
Environmental Planner I
Environmental Planner II
Environmental Planner III
Environmental Project Manager II
Equipment Manager
GIS Specialist I
Graphics
Land Manager
Landscape Designer I
Landscape Project Manager
Paleontology Technician
Principal
Principal Air Quality Specialist
$123
$168
$163
$130
$207
$156
$162
$200
$214
$227
$240
$ 97
$149
$227
$324
$260
$156
$182
$188
$221
$134
$168
$214
$138
$168
$214
$130
$428
$344
Proposal to Provide On-Call Planning and Environmental Services for Grand Terrace April 23, 2026 w page 26 Position Hourly Rate
Principal Biologist
Principal Cultural Resources Specialist
Principal Landscape Architect
Principal Paleontologist
Principal Planner
Principal Regulatory Specialist
Project Accountant
Regulatory Specialist
Safety Manager
Sr. Archaeological Field Director
Sr. Archaeologist I
Sr. Architectural Historian
Sr. Biology Project Manager
Sr. Cultural Resources PM II
Sr. Cultural Resources PM I
Sr. Environmental Planner
Sr. Environmental Project Manager
Sr. Environmental Specialist
Sr. Field Director
Sr. GIS Specialist
Sr. GIS Specialist/Manager
Sr. Marketing Coordinator
Sr. Noise/Air Quality Specialist
Sr. Project Operations Manager
Sr. Scientist I
Sr. Scientist II
Staff Archaeologist
Staff Paleontologist
Technical Editor
$330
$305
$311
$298
$382
$421
$195
$188
$291
$195
$200
$227
$363
$272
$272
$221
$298
$253
$195
$246
$260
$214
$214
$195
$253
$286
$130
$162
$181
Project Partners
Position Hourly Rate
Sr. Public Works Engineer (Water Quality)
Sr. Plan Check Engineer (Transportation)
$179
$202
The above hourly rates apply only to authorized contract services and exclude contract administration activities. All time-and-materials work shall be billed monthly in accordance with a Professional Services Agreement. When incorporated into an on-call contract, the hourly rates shall be automatically increased annually effective on July 1 of each year, based on the Consumer Price Index for the Riverside-San BernardinoOntario region for the month of May of that same year, unless otherwise agreed to in writing by the City and Civic Solutions.
EXHIBIT “D”
SCHEDULE OF PERFORMANCE
i. Consultant shall perform all Services timely to ensure the prompt and timely processing of all planning related applications and approval thereof by the planning department, Planning Commission, and/or City Council.
ii. Consultant shall timely deliver the any and all documents related to the Services, as described in Section I of Exhibit “A”, to the City for the processing of, and approval, of any and all applications for development by the planning department, Planning iii. Commission, and/or City Council. The Contract Officer may approve extensions for performance of the services in accordance with Section 3.2. iv. Unless earlier terminated in accordance with Article 7 of this Agreement, this Agreement shall continue in full force and effect from and after the Effective Date of this Agreement for a term of three (3) years (“Term”).
EXHIBIT E
INSURANCE REQUIREMENTS
Contractor shall procure and maintain for the duration of the contract insurance against claims for injuries to persons or damages to property which may arise from or in connection with the performance of the work hereunder by the Contractor, its agents, representatives, or employees.
MINIMUM SCOPE AND LIMIT OF INSURANCE
Coverage shall be at least as broad as:
1. Commercial General Liability (CGL): Insurance Services Office Form CG 00 01 covering CGL on an “occurrence” basis, including products and completed operations, property damage, bodily injury and personal & advertising injury with limits no less than $2,000,000 per occurrence.
If a general aggregate limit applies, either the general aggregate limit shall apply separately to this project/location (ISO CG 25 03 or 25 04) or the general aggregate limit shall be twice the required occurrence limit.
2. Automobile Liability: Insurance Services Office Form Number CA 0001 covering, Code 1 (any auto), or if Contractor has no owned autos, Code 8 (hired) and 9 (non-owned), with limit no less than $1,000,000 per accident for bodily injury and property damage.
3. Workers’ Compensation insurance as required by the State of California, with Statutory Limits, and Employer’s Liability Insurance with limit of no less than $1,000,000 per accident for bodily injury or disease. (Not required if Contractor provides written verification it has no employees)
5. Cyber: Vendor/Contractor shall procure and maintain for the duration of the contract insurance against claims for security breaches, system failures, injuries to persons, damages to software, or damages to property (including computer equipment) which may arise from or in connection with the performance of the work hereunder by the Vendor, its agents, representatives, or employees.
Vendor shall procure and maintain for the duration of the contract insurance claims arising out of their services and including, but not limited to loss, damage, theft or other misuse of data, infringement of intellectual property, invasion of privacy and breach of data.
Cyber Liability Insurance, with limits not less than $2,000,000 per occurrence or claim, $2,000,000 aggregate. Coverage shall be sufficiently broad to respond to the duties and obligations as is undertaken by Vendor in this agreement and shall include, but not be limited to, claims involving security breach, system failure, data recovery, business interruption, cyber extortion, social engineering, infringement of intellectual property, including but not limited to infringement of copyright, trademark, trade dress, invasion of privacy violations, information theft, damage to or destruction of electronic information, release of private information, and alteration of electronic information. The policy shall provide coverage for breach response costs, regulatory fines and penalties as well as credit monitoring expenses.
If the Contractor maintains broader coverage and/or higher limits than the minimums shown above, the City requires and shall be entitled to the broader coverage and/or the higher limits maintained
by the Contractor. Any available insurance proceeds in excess of the specified minimum limits of insurance and coverage shall be available to the City.
Other Insurance Provisions
The insurance policies are to contain, or be endorsed to contain, the following provisions:
Additional Insured Status
The City, its officers, officials, employees, and volunteers are to be covered as additional insureds on the CGL policy with respect to liability arising out of work or operations performed by or on behalf of the Contractor including materials, parts, or equipment furnished in connection with such work or operations.
General liability coverage can be provided in the form of an endorsement to the Contractor's insurance (at least as broad as ISO Form CG 20 10 11 85 or if not available, through the addition of both CG 20 10, CG 20 26, CG 20 33, or CG 20 38; and CG 20 37 if a later edition is used).
Primary Coverage
For any claims related to this contract, the Contractor’s insurance coverage shall be primary and noncontributory and at least as broad as ISO CG 20 01 04 13 as respects the City, its officers, officials, employees, and volunteers. Any insurance or self-insurance maintained by the City, its officers, officials, employees, or volunteers shall be excess of the Contractor’s insurance and shall not contribute with it. This requirement shall also apply to any Excess or Umbrella liability policies.
Umbrella or Excess Policy
The Contractor may use Umbrella or Excess Policies to provide the liability limits as required in this agreement. This form of insurance will be acceptable provided that all of the Primary and Umbrella or Excess Policies shall provide all of the insurance coverages herein required, including, but not limited to, primary and non-contributory, additional insured, Self-Insured Retentions (SIRs), indemnity, and defense requirements. The Umbrella or Excess policies shall be provided on a true “following form” or broader coverage basis, with coverage at least as broad as provided on the underlying Commercial General Liability insurance. No insurance policies maintained by the Additional Insureds, whether primary or excess, and which also apply to a loss covered hereunder, shall be called upon to contribute to a loss until the Contractor’s primary and excess liability policies are exhausted.
Notice of Cancellation
Each insurance policy required above shall provide that coverage shall not be canceled, except with notice to the City.
Waiver of Subrogation
Contractor hereby grants to City a waiver of any right to subrogation which any insurer of said Contractor may acquire against the City by virtue of the payment of any loss under such insurance. Contractor agrees to obtain any endorsement that may be necessary to affect this waiver of subrogation, but this provision applies regardless of whether or not the City has received a waiver of subrogation endorsement from the insurer.
Self-Insured Retentions
Self-insured retentions must be declared to and approved by the City. The City may require the Contractor to purchase coverage with a lower retention or provide proof of ability to pay losses and related investigations, claim administration, and defense expenses within the retention. The policy language shall provide, or be endorsed to provide, that the self-insured retention may be satisfied by either the named insured or City. The CGL and any policies, including Excess liability policies, may not be subject to a selfinsured retention (SIR) or deductible that exceeds $25,000 unless approved in writing by City. Any and all