HABITAT MITIGATION & MONITORING PLAN
FOR THE
QUARRY LAKES PARKWAY MANAGEMENT AREA
Alameda and Contra Costa Counties, California
Applicant/Permittee:
CITY OF UNION CITY
Public Works 34009 Alvarado Niles Rd.
Union City, California 94587
Prepared by:
OLBERDING ENVIRONMENTAL, INC.
3160 Crow Canyon Place, Suite 150
San Ramon, CA 94583
Phone: (916) 985-1188 | Email: [email protected]
APRIL 2026
1 TABLE OF CONTENTS
1.0 SUMMARY................................................................................................................................. 1
1.1 Summary............................................................................................................................. 1
1.2 Responsible Parties............................................................................................................. 2
1.2.1 Permittee ................................................................................................................. 2
1.2.2 Land Manager......................................................................................................... 2
1.2.3 Project Biologist...................................................................................................... 3
2.0 OBJECTIVES.............................................................................................................................. 3
2.1 Habitat Establishment (Creation)........................................................................................ 4
2.1.1 Drainage Establishment .......................................................................................... 4
2.1.2 Riparian Establishment ........................................................................................... 4
2.1.3 Seasonal Wetland Establishment ............................................................................ 4
2.2 Habitat Enhancement.......................................................................................................... 5
2.2.1 Cayetano Creek Corridor Preservation/Enhancement ............................................ 5
2.3 Habitat Preservation............................................................................................................ 5
2.3.1 Annual Grassland Preservation............................................................................... 5
3.0 BASELINE INFORMATION ..................................................................................................... 8
3.1 Location .............................................................................................................................. 8
3.2 Landscape Position ............................................................................................................. 8
3.3 Topography and Elevations ................................................................................................ 9
3.4 Watershed Description........................................................................................................ 9
3.5 Climate and Precipitation.................................................................................................... 9
3.6 Soils ................................................................................................................................. 9
3.7 Historic, Existing, and Surrounding Land Uses................................................................ 10
3.8 Cultural ............................................................................................................................. 10
3.9 Vegetation......................................................................................................................... 10
3.10 Wetlands/Waters of the U.S.............................................................................................. 11
3.11 Special-Status Species ...................................................................................................... 11
4.0 IMPLEMENTATION PLAN .................................................................................................... 17
4.1 Implementation Approach and Sequence ......................................................................... 17
4.2 Site Preparation................................................................................................................. 18
4.2.1 Intermittent Drainage and Seasonal Wetland Creation......................................... 18
4.2.2 Riparian Habitat Creation ..................................................................................... 18
4.2.3 Cayetano Creek Corridor Preservation/Enhancement .......................................... 18
4.3 Grading ............................................................................................................................. 18
4.4 Revegetation of Disturbed Areas...................................................................................... 19
4.4.1 Intermittent Drainage and Seasonal Wetland Creation......................................... 19
4.4.2 Riparian Creation and Cayetano Creek Corridor Preservation/Enhancement...... 20 2 4.5 Implementation Schedule.................................................................................................. 21
4.6 Documentation of As-Built Conditions............................................................................ 21
5.0 MAINTENANCE PLAN........................................................................................................... 22
5.1 Pest Plant and Wildlife Species ........................................................................................ 22
5.2 Fencing.............................................................................................................................. 23
5.3 Irrigation Plan ................................................................................................................... 23
6.0 PERFORMANCE STANDARDS............................................................................................. 23
6.1.1 Seasonal Wetland Performance Standards............................................................ 24
6.1.2 Drainage Establishment and Caytano Creek Corridor Preservation/Enhancement Performance Standards ......................................................................................... 24
6.1.3 Riparian Establishment Performance Standards................................................... 26
7.0 MONITORING AND REPORTING......................................................................................... 27
7.1 Intermittent Drainage and Seasonal Wetland Monitoring ................................................ 32
7.2 Riparian Creation and Enhancement Monitoring ............................................................. 33
7.3 Non-Native Invasive Vegetation Monitoring ................................................................... 33
7.4 Photo Documentation........................................................................................................ 33
7.5 Annual Report................................................................................................................... 33
8.0 ADAPTIVE MANAGEMENT/REMEDIAL MEASURES...................................................... 35
9.0 REFERENCES AND LITERATURE CONSULTED .............................................................. 37 3 LIST OF ATTACHMENTS
ATTACHMENT 1 ~ FIGURES
Figure 1 Regional Map
Figure 2 Project Vicinity
Figure 3 USGS Topographic Map
Figure 4 Mitigation Property Aerial Photo
Figure 5 Eagle Ridge East Preserve - Jurisdiction Delineation Figure 6 Off-Site Mitigation Plan
Figure 7 Nearby Special-Status Species Occurrences
ATTACHMENT 2 ~ REPRESENTATIVE PHOTOGRAPHS
ATTACHMENT 3 ~ LANDSCAPE PLAN SET
ATTACHMENT 4 ~ HYDROLOGY REPORT
______________________________________________________________________________ This report should be cited as: Olberding Environmental, Inc. April 2026. Habitat Mitigation and Monitoring Plan for the Quarry Lakes Parkway Management Area, Alameda and Contra Costa Counties, California. Prepared for the City of Union City, Union City, California.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 1 1.0 SUMMARY
1.1 Summary
Olberding Environmental, Inc. (Olberding Environmental) has prepared this Habitat Mitigation Monitoring Plan (MMP) on behalf of the City of Union City (Permittee) to provide compensatory off-site mitigation for impacts to habitats resulting from the Quarry Lakes Parkway (QLP) Project, Phases 1 to 4 (Phase 1 - Mission Blvd. to 7th Street, Phase 2 - Alvarado Niles Road to Old Alameda Creek, Phase 3 - 7th Street to 11th Street, and Phase 4 - 11th Street to Alvarado Niles Road) (Project).
This project included 0.9 mile of new four lane roadway which would extend from Old Alameda Creek in the west to Mission Boulevard in the east through a corridor that is primarily undeveloped because it has been reserved for a roadway. The undeveloped area includes Old Alameda Creek, transit and railroad tracks, two detention basins, and the Line M Stormwater Channel. The design standard for a new four-lane roadway complies with the recommendations of the Urban Street Design Guidelines of the National Association of City Transportation Officials (NACTO) and would not be designed as a Caltrans’ freeway or expressway.
The Project will result in the permanent fill of federal and state jurisdictional wetlands/waters that total approximately 1.8 acres. This includes 0.3 acres of riparian impacts, 1.1 acres of wetland impacts, and 0.4 acres of other waters (channel) impacts. A portion of these impacted jurisdictional features will be mitigated on site, while the remainder of the required mitigation will occur within a designated portion of the nearby Eagle Ridge Preserve East Property (Mitigation Property).
The proposed Mitigation Property contains existing aquatic features that will be enhanced as part of this MMP, in addition to existing annual grassland habitat where new aquatic features will be constructed. In addition, the Mitigation Property contains known occurrences of numerous specialstatus species including Congdon’s tarplant (Centromadia parryi ssp. congdonii), California tiger salamander (Ambystoma californiense), California red-legged frog (Rana draytonii), and burrowing owl (Athene cunicularia). This MMP includes summary information about the Mitigation Property; objectives for the compensatory replacement, implementation specifications, including underlying rationale for expecting success; maintenance and monitoring provisions, and contingency measures.
The MMP presented herein is subject to approval by the regulatory agencies, which includes the U.S. Army Corps of Engineers (USACE), the U.S. Fish and Wildlife Service (USFWS), the California Department of Fish and Wildlife (CDFW), and the California Regional Water Quality Control Board (RWQCB).
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 2 1.2 Responsible Parties
1.2.1 Permittee
The Permittee is:
City of Union City Public Works
34009 Alvarado Niles Rd.
Union City, California 94587
The Permittee responsibilities in the Mitigation Property include the following:
• The implementation of all construction and management activities associated with the achievement of performance standards and as described in the MMP. • Ensuring that all activities associated with establishing the Mitigation Property are funded and implemented, including recordation of a Conservation Easement, start-up activities (signage, infrastructure development, as applicable), construction of the wetlands, etc. • Providing long-term funding to ensure long-term management as described in the MMP.
Any subsequent grading, or alteration of the topography and/or hydrology of the Mitigation Property by the Permittee or its representatives must be approved by the USACE, USFWS, CDFW, and RWQCB; and the necessary environmental permits, such as a Section 404 permit, must be obtained, if required.
1.2.2 Land Manager
The Permittee has designated Olberding Environmental, Inc. as the Land Manager to oversee mitigation habitat construction, plant installation, and maintenance during the habitat establishment period. It is anticipated that the wetland and intermittent drainage features will take 5 years to establish, while the woody riparian vegetation will take 10 years.
The Land Manger is:
Olberding Environmental Inc.
193 Blue Ravine Road, Suite 165
Folsom, California 95630
Contact: Jeff Olberding
[email protected]
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 3 The Land Manager responsibilities in the Mitigation Area include the following:
• Coordinating mitigation site implementation,
• Assist the contractor with grading and plant installation. • Coordinate maintenance activities with the landscape maintenance contractor. • Conducting management activities to preserve and enhance habitat and conservation values in accordance with this MMP.
• Implementing management activities as described in this MMP, including but not limited to:
o Maintaining and replacing signs and other infrastructure, as needed. o Collecting and removing trash.
o Preparing and submitting annual reports.
1.2.3 Project Biologist
The Permittee shall implement this MMP for biological impacts and monitor the mitigation program in accordance with this MMP.
The Project Biologist will monitor habitat on the impact sites. The Land Manager and Project Biologist can be the same entity. The Project Biologist will be a professional botanist, biologist, or restoration ecologist familiar with California flora and fauna, and will have a working knowledge regarding protected habitats and species as defined by the resource agencies. The Project Biologist must also be familiar with vegetation management practices for maintaining the created habitats.
The Project Biologist will have demonstrated experience in monitoring sensitive resource issues on construction and/or mitigation projects. Specifically, the monitor will have at least four years of university training in wildlife biology or a related science and/or has demonstrated field experience in the identification and life history of the listed species and natural history of sensitive resources in the vicinity of the Project.
2.0 OBJECTIVES
The primary objective of the Mitigation Property is to provide compensatory mitigation for unavoidable impacts through the establishment of new drainage features, seasonal wetlands, and riparian habitat, in addition to enhancement of existing riparian habitat and preservation of existing annual grassland habitat. A conceptual map of the off-site mitigation is included in Attachment 1, Figure 6, and a detailed landscape plan set is included in Attachment 3. A Hydrology Assessment which includes an estimate of available water to sustain the various vegetation communities proposed for the Mitigation Property is included as Attachment 4. A summary of mitigation activities is included below in Table 1.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 4 2.1 Habitat Establishment (Creation)
Establishment (creation) means the manipulation of the physical, chemical, or biological characteristics present to develop a natural resource that did not previously exist at an upland site.
Successful establishment results in a gain in natural resource area and functions.
2.1.1 Drainage Establishment
Drainage features will be established (created) by excavating and grading sinuous, linear channels in formerly upland areas. Excavation and grading will expose the soils to direct precipitation and storm water flows that will occur seasonally during the late winter through early spring months.
Construction of the drainage features in these areas will include compaction of the top layer to reduce infiltration. The goal is to provide the characteristic interception of precipitation and overland flow into drainages that will help to replicate natural water flow and ensure habitat diversity and ecosystem health. The drainage features will be constructed so that they intercept surface runoff that flows across these slopes. These drainage features will then feed into seasonal wetlands that will be constructed on-site. A minimum of 1,800 linear feet of new channel will be established with at least 1 acre total of new channel and riparian estimation (see discussion below).
2.1.2 Riparian Establishment
Riparian habitat will be established (created) by planting native riparian woody vegetation and accompanying herbaceous cover along the top of the bank of the existing and constructed drainage features. The riparian plantings will be contiguous with current native riparian vegetation occurring on the Property, creating a larger mosaic of riparian habitat on the Property. This will be accomplished through active revegetation, which includes a combination of plant installation and maintenance, irrigation, and weed control. Within the riparian Mitigation Areas, oaks, shrubs, and forbs will be revegetation on suitable terraces and slopes within the existing drainages. A mix of oak and shrub species will be revegetated along the top of bank, where the topography and soils are suitable.
2.1.3 Seasonal Wetland Establishment
Seasonal wetlands will be established (created) by excavating and grading depressions in formerly upland areas. Excavation and grading will expose the clay soils to rainfall and storm water flows that will typically pond and/or saturate the root zone on a seasonal basis during the late winter through early spring months. Construction of the wetland features in these areas will include compaction of the clay layer to reduce infiltration. The goal is to provide the characteristic interception of precipitation and overland flow into seasonal wetlands that will help to ensure habitat diversity and ecosystem health. The mitigation site that has been selected for this project Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 5 includes a portion of Cayetano Creek. Most of the seasonal wetland features will be established along the banks of the Creek, or drain directly into the Creek, thereby fulfilling the goal of increasing the habitat diversity and ecosystem health of the surrounding landscape. Monitoring and performance standards for the established wetlands are discussed in Section 7 of this document.
A minimum of 3.4 acres of seasonal wetland will be established. Of that, at least 0.4 acres will provide aquatic habitat for the California tiger salamander, at least 1.8 acres would provide aquatic habitat for California red-legged frog.
2.2 Habitat Enhancement
Enhancement includes the manipulation of the physical, chemical, and/or biological characteristics of an aquatic resource to heighten, intensify, or improve specific aquatic resource function(s).
Enhancement results in the gain of selected aquatic resource function(s) but does not result in a gain in aquatic resource area.
2.2.1 Cayetano Creek Corridor Preservation/Enhancement
The portion of Cayetano Creek that flows south, through the northern portion of the Mitigation Area contains steeply incised banks with sporadic riparian vegetation. Despite the incised nature of the banks, the Creek appears to be in relative equilibrium, in that there are no signs of sediment deposits within the bed of the feature and the banks are vegetated with grasses and other forb species. The banks of this feature will be enhanced and stabilized through the installation of native riparian plantings, with the plantings extending beyond the top of bank to create an extended riparian canopy. These plantings will allow for a more natural erosion and sedimentation regime within the feature. This work will not require any geomorphological work.
2.3 Habitat Preservation
Habitat preservation includes maintaining existing habitat areas in their current state. This typically includes maintaining previous habitat management practices such as grazing or mowing and ensuring that there is no degradation of the habitat areas through the introduction of invasive species.
2.3.1 Annual Grassland Preservation
Annual grassland habitat that occurs throughout the upland portions of the Mitigation Area will be preserved in their current state. This will include the continued use of cattle grazing to control thatch levels and annual surveys for the introduction of any problematic invasive species. A Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 6 minimum of 18 acres of upland grassland habitat will be preserved and managed for the benefit of California tiger salamander, and California red-legged frog. If Crotch’s bumble bee is encountered on the Quarry Lakes Parkway Project, Phases 1 to 4, then a portion of the 18 acres would also be preserved for the benefit of this species. If western bumble bee is encountered during construction of the mitigation on the offsite mitigation area, then a portion of the 18 acres would also be preserved for the benefit of this species.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 7 Table 1: Mitigation Activity Summary
Pre-Construction
Site Conditions Post-Construction Site Conditions
Habitat Types1
Habitat
Types1
Vegetation2 Hydrology Mitigation
Method Acres Cowardin
3 HGM4
Aquatic Features
Annual Grassland Intermittent
Drainage
A mix of hydric grasses, graminoids, and
forbs.
Seasonally
flooded Establishment 0.20 (1,800
linear feet)
R4SB7 Riverine
Annual Grassland Riparian
Woodland
A mix of willows, oaks, and shrubs similar
to existing native riparian habitat on site.
Seasonally
saturated Establishment 1 (1,120
linear feet)
R4SB7 Riverine
Annual Grassland Seasonal
Wetland
A mix of hydric grasses, graminoids, and
forbs.
Seasonally
flooded Establishment 3.40 PEM1 Depressional
Riparian Woodland Riparian
Woodland
A mix of willows, oaks, and shrubs similar
to existing native riparian habitat on site.
Seasonally
flooded Enhancement 0.38 (1,120
linear feet)
R4SB7 Riverine
TOTAL 4.98
1. Habitat Types: Habitat types are general common qualitative descriptions such as riparian, marsh, tidal wetlands, open water, seasonal wetlands, vernal pool, or annual grassland.
2. Vegetation Classification: Vegetation community types are based on the most recent widely accepted classification system, the communities used are from A Manual of California Vegetation (Sawyer et al. 2009)
3. Cowardin: Use the Classification of Wetlands and Deepwater Habitats of the United States to identify the System, Subsystem, and Class.
4. HGM: Use the Hydrogeomorphic (HGM) Classification of Wetlands to identify the appropriate class. There are seven HGM classes: Riverine, Slope, Mineral Soil Flats, Organic Soil Flats, Depressional, Estuarine Fringe, and Lacustrine Fringe.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 8 3.0 BASELINE INFORMATION
3.1 Location
The Mitigation Property is located on the north and south sides of Manning Road and the east and west sides of Highland Road, approximately 3.5 miles north of I-580 (Attachment 1, Figures 1-5). The Mitigation Area consists of five separate proposed easement areas located within the Preserve. These proposed easement areas do not have any current easements placed on them. Besides the two active residences, the remainder of the Preserve property falls under several active conservation easements which are collectively managed for habitat creation, preservation and special-status species mitigation. The Mitigation Area discussed in this Plan will be managed with these other conservation easement areas.
Proposed Easement Area 1 consists of the western most mitigation area where seasonal wetland creation will occur. Proposed Easement Area 2 consists of the northwestern mitigation area where seasonal wetland creation and annual grassland preservation will occur. Proposed Easement Area 3 consists of the northeastern mitigation area along Highland Road where seasonal wetland, intermittent drainage, and riparian creation, in addition to Cayetano Creek corridor preservation/enhancement will occur. Proposed Easement Area 4 is located south of Manning Road where seasonal wetland, intermittent drainage, and riparian creation will occur. Proposed Easement Area 5 consists of the easternmost mitigation area where annual grassland preservation will occur. These five Proposed Easement Areas are shown in Attachment 1, Figures 4 and 6.
Representative photographs of the Mitigation Property can be found in Attachment 2.
Access to the Mitigation Property is provided by taking Interstate-580 East from Interstate-680.
Take exit 52B for North Livermore Avenue toward Livermore. Turn left (north) at North Livermore Avenue and follow it for 3.6 miles. Turn left (west) at Manning Road and follow it for
1.2 miles before turning left (south) onto the Eagle Ridge Preserve – East Property.
3.2 Landscape Position
The Mitigation Property is located within the hills north of Livermore Valley. Proposed Easement Area 1 consists of a flat floodplain at the base of a set of hills. Proposed Easement Area 2 consists of several low, rolling hills with a flat area in the northeast corner where seasonal wetlands will be constructed. Proposed Easement Areas 3 and 4 consist of a portion of Cayetano Creek and its adjacent banks and upland habitat where aquatic feature creation will occur. Proposed Easement Area 5 also consists of rolling hills where annual grassland habitat will be preserved.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 9 3.3 Topography and Elevations
The topography within Proposed Easement Area 1 is relatively flat with elevation around 730 feet above sea level throughout the easement area. Topography within Proposed Easement Area 2 consists of rolling hills with elevation sloping to the east. Elevation within this easement area ranges from 810 feet above sea level in the northwest corner to 690 feet above sea level near the northeast corner. Proposed Easement Area 3 ranges from 710 feet above sea level in the northeast corner to 680 above sea level in the southwest corner within the creek bed. Elevation within Proposed Easement Area 4 ranges from 710 feet above sea level along the western boundary to 645 feet above sea level along the eastern boundary within the creek bed. Elevation within Proposed Easement Area 5 ranges from 785 feet above sea level on the hilltop to 660 feet above sea level along the downhill slope.
3.4 Watershed Description
The Mitigation Property is located within the San Francisco Bay 8-digit hydrologic unit code (HUC 18050004). This HUC includes all of the South San Francisco Bay, eastward to include most of Alameda County. More locally, the Property is within the Lower Arroyo Las Positas 12- digit hydrologic unit code (HUC 18050040203). This HUC includes most of the Livermore area, north and south of I-580.
A Hydrology Analysis has been completed for the Mitigation Property and is included as Attachment 4.
3.5 Climate and Precipitation
The Livermore Valley of California is characterized by a Mediterranean climate of hot, dry summers and a mild, wet winter. In a typical year, two thirds of the precipitation falls during the “rainy season” of November through February. The valley runs in an east to west direction with hills and low mountains surrounding it. The valley is located approximately 12 miles inland from the San Francisco Bay and approximately 25 miles south of the Suisun Bay.
The annual 20-year average rainfall for the Livermore area is 13.35 inches (NOAA 2025). Mean maximum temperatures range from a low of 68 degrees Fahrenheit in December and January and a high of 104 degrees Fahrenheit in July (NOAA 2025).
3.6 Soils
The USDA Natural Resources Conservation Service (formerly the Soil Conservation Service) mapped soil types within the County (NRCS 2025). The Mitigation Property contains five soil Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 10 types:
• CdA & CdAaa: Clear Lake clay, drained, 0 to 2 percent slopes MLRA 14 • DbD & DdE: Diablo clay, 15 to 30 percent slopes, MLRA 15 • DdDcc: Diablo clay, 9 to 15 percent slopes
• LaD & LbE: Linne clay loam, 15 to 30 percent slopes, MLRA 15 • Pb: Pescadero clay loam, 0 to 6 percent slopes, MLRA 14 The Clear Lake clay, Linne clay loam, and Pescadero clay loam soils are classified as Hydric soils, but the Diablo clay soils are not (NRCS 2025). Hydric soils are defined by the National Technical Committee for Hydric Soils as soils that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anoxic conditions in the upper part.
3.7 Historic, Existing, and Surrounding Land Uses
The Mitigation Property has existed in a similar state for many decades, consisting of open grassland habitat regularly grazed by cattle. Due to its location within old Spanish territory, cattle have likely been grazed on the Mitigation Property for centuries. The surrounding properties consist of open grazing land with individual homesteads.
3.8 Cultural
A cultural study was conducted by Peak & Associates, Inc. in 2021 and the report concluded that there are no known historical sites within the Preserve. If archeological discoveries are encountered during the course of habitat construction, various mitigation measures will be implemented, and an archeological mitigation plan will be prepared.
3.9 Vegetation
A wetland delineation of the Mitigation Property was conducted in 2021 and 2025 and found that the Mitigation Property supports two habitat types that consist of annual grassland and a portion of Cayetano Creek (an intermittent drainage). The banks of Cayetano Creek contain existing areas of riparian vegetation. Generalized plant community classifications were used to classify the habitat types found on the Property. The final classification and characterization of the habitat types of the Project Area and Mitigation Property were based on field observations.
Annual Grassland
Most of the Mitigation Property consists of annual grassland habitat that is regularly grazed by cattle. This annual grassland habitat is dominated by non-native annual grasses and forbs such as wild oat (Avena fatua), ripgut brome (Bromus diandrus), wall barley (Hordeum murinum), Italian Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 11 ryegrass (Festuca perennis), black mustard (Brassica nigra), milk thistle (Silybum marianum), heron bill filaree (Erodium cicutarium), and California burclover (Medicago polymorpha).
Cayetano Creek
A portion of Cayetano Creek flows through Proposed Easement Areas 3 and 4. The intermittent drainage features flows into the Mitigation Area through the northern portion of Proposed Easement Area 3, where it flows south before entering a large 4 ft. concrete box-culvert located under Manning Road. Upon entering Proposed Easement Area 4 on the southside of Manning Road, the feature turns to the east and forms a serpentine channel that flows parallel to Manning Road before flowing out of the eastern boundary of Proposed Easement Area 4.
Riparian vegetation adjacent to the channel consists of woody species such as redgum eucalyptus, valley oak (Quercus lobata), California black walnut (Juglans hindsii), and Fremont cottonwood (Populus fremontii), with an understory of hedge nettle (Stachys ajugoides), poison oak (Toxicodendron diversilobum), ripgut brome, wild oat, Italian ryegrass, bull thistle (Cirsium vulgare), and other herbaceous species.
3.10 Wetlands/Waters of the U.S.
Hydrological characteristics, flow, and connectivity of the Mitigation Property were determined in 2021 and 2025 during a wetland delineation following USACE standard protocol on the Property and surrounding areas under the same ownership. A copy of the delineation map which was submitted for verification is included in Attachment 1, Figure 5).
3.11 Special-Status Species
A Biological Resource Assessment was completed by Olberding Environmental in 2022 for the Mitigation Property. This assessment has been updated based on recent CNDDB occurrences (CDFW 2025) and updates to listing status of species. A map showing the location of specialstatus species observations in the vicinity of the Mitigation Property is included in Attachment 1, Figure 7. The Mitigation Property has the potential to support numerous special status plant and animal species. Special-status species with the potential to occur are listed below. • Congdon’s Tarplant (Centromadia parryi ssp. congdonii). CNPS List 1B. This species typically occurs in valley and foothill grasslands in moist alkaline soils. This species is known to occur within the Mitigation Property and the adjacent mitigation lands to the west and south. Hundreds of individuals have been observed growing within the annual grassland habitat of the Mitigation Property, particularly surrounding Proposed Easement Area 1. Therefore, this species is considered present within the Mitigation Property.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 12 • Crotch’s Bumble Bee (Bombus crotchii). California Candidate for Endangered. This native species of bee occurs primarily in California, including the Mediterranean climate region of the state, Pacific coast, western desert, the Great Valley, and adjacent foothills throughout most of southwestern California. Habitat for this species includes open grassland and scrub areas, and this species is able to persist in semi-natural habitats surrounded by intensely modified landscapes. This species usually nests underground.
Food plants for the Crotch’s bumble bee include Asclepias, Chaenactis, Lupinus, Medicago, Phacelia, and Salvia (Kockh, et al 2012). While the crotch’s bumble bee has not been observed on the Mitigation Property, there are nearby CNDDB occurrences, and several of the required food plants for this species are known to occur throughout the annual grassland habitat. Therefore, this species may occur within the Mitigation Property. • Western Bumble Bee (Bombus occidentalis). California Candidate for Endangered.
The western bumble bee occurs in Canada and the USA from southern British Columbia to central California, northern Arizona and northern New Mexico, and east into southern Saskatchewan and northwestern Great Plains. This species is found in a range of habitats including mixed woodlands, farmlands, urban areas, montane meadows, and into the western edge of the prairie grasslands. This species usually nests underground. Food plants include Ceanothus, Centaurea, Chrysothamnus, Cirsium, Geranium, Grindellia, Lupinus, Melilotus, Monardella, Rubus, Solidago, and Trifolium (Koch, et al 2012). While the western bumble bee has not been observed on the Mitigation Property, there are nearby CNDDB occurrences, and several of the required food plants for this species are known to occur throughout the annual grassland habitat. Therefore, this species may occur within the Mitigation Property.
• California Red-Legged Frog (CRLF) (Rana draytonii). Federally Threatened, California Species of Special Concern. This species is found in lowlands, foothill woodland and grasslands, near marshes, lakes, ponds, or other water sources. These amphibians require dense shrubby or emergent vegetation closely associated with deep still or slow-moving water. Generally, these frogs favor intermittent streams with water at least two and a half feet deep and where the shoreline has relatively intact emergent or shoreline vegetation. CRLF is known from streams with relatively low gradients and those waters where introduced fish and bullfrogs are absent. This species is known to occur within the western branch of Cayetano Creek that flows along the western edge Eagle Ridge Preserve East, south of Proposed Easement Area 1 (Attachment 1, Figure 7). Additionally, the portion of Cayetano Creek that flows through the Mitigation Property provides ideal aquatic habitat for the species with many pools, undercut banks and abundant foraging areas. The grassland habitat within the site contains structural features such as small mammal burrows that provide suitable upland habitat within a close proximity to known CRLF breeding ponds. This species has been observed annually for over 10+ years, in all Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 13 life stages during monitoring of the West Branch of Cayetano Creek which forms the western boundary of the mitigation area. The site is located in USFWS designated Critical Habitat for CRLF. Over 50+ ponds occurring within recognized CRLF dispersal distances surrounding the Mitigation Property offering abundant breeding habitat opportunities.
Numerous CNDDB occurrences have been recorded in addition to staff biologist sightings on surrounding properties.
• California Tiger Salamander (Ambystoma californiense). Federally Threatened, State Threatened. This species prefers vernal pools and other temporary ponds as breeding pools. However, they may also use permanent manmade ponds as breeding habitat. The larval state of the CTS usually lasts three to six months, with metamorphosis beginning in late spring or early summer (USFWS 2017). The annual grassland habitat found throughout the Mitigation Property provides structural features such as small mammal burrows that provide suitable upland habitat for this species within a close proximity to known CTS breeding ponds (Attachment 1, Figure 7). Annual survey results within the CTS breeding ponds in the adjacent Cayetano Creek Mitigation Bank show thousands of CTS larvae, indicating the landscape supports amble breeding habitat for the species. This species has been observed annually for over 5+ years, in all life stages during monitoring of the Cayetano Creek Mitigation Bank which forms the western boundary of the mitigation area.
The site is located directly adjacent to USFWS designated Critical Habitat for CTS. As mentioned above, there are over 50+ ponds occurring within recognized CTS dispersal distances surrounding the Mitigation Property offering abundant breeding habitat opportunities. Numerous CNDDB occurrences have been recorded in on surrounding properties in addition to staff biologist monitoring observations. • Grasshopper Sparrow (Ammodramus savannarum). California Species of Special Concern. The grasshopper sparrow occurs in California primarily as a summer resident from March to September. The winter status of this species is unknown. Within California, it is found from Mendocino and Shasta Counties south through the Central Valley and surrounding foothills, and along the South Coast to the Mexico border. Within California the species prefers short to middle-height, moderately open grasslands with scattered shrubs. The sparrows build nests domed with grasses and with a side entrance, typically well concealed in depressions at the base of grass clumps (Shuford and Gardali 2008).
While this species has not been observed within the Mitigation Property, the annual grassland habitat found throughout the Mitigation Property provides potential foraging and nesting habitat for this species. Therefore, this species may occur within the Mitigation Property.
• Burrowing Owl (Athene cunicularia). California Candidate for Endangered.
Burrowing owls are ground dwelling members of the owl family and are small brown to Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 14 tan colored birds with bold spots and barring. Burrowing owls generally require open annual grassland habitats in which to nest, but can be found on abandoned lots, roads, airports, and other urban areas. Burrowing owls generally use abandoned California ground squirrel holes for their nesting burrow but are also known to use pipes or other debris for nesting purposes. Burrowing owls prefer annual grassland habitats with low vegetative cover. As is shown in Attachment 1, Figure 7, there have been numerous observations of burrowing owl adjacent to the Mitigation Property and surrounding preserve properties (this includes Eagle Ridge Preserve, Eagle Ridge Preserve North, Cayetano Creek Mitigation Bank, Cayetano Creek Preserve, and the Collier Canyon Preserve).
Additionally, the grassland areas within the Mitigation Property provide suitable foraging habitat, and the ample active ground squirrel burrow complexes onsite create suitable breeding habitat for burrowing owls. While species-focused surveys have not occurred within the Mitigation Property, this species is assumed to be present within the Mitigation Property due to the abundance of ideal habitat and numerous observations within surrounding properties.
• Ferruginous Hawk (Buteo regalis). California Watch List. The ferruginous hawk is a large, broad-winged hawk sometimes mistaken for an eagle due to its size, proportions, and behavior. This is the largest hawk species within the Buteo family. It is an uncommon winter resident and migrant at lower elevation and open grasslands in the Modoc Plateau, Central Valley, and Coast Ranges. However, it is a fairly common winter resident of grasslands and agricultural areas in southwestern California. It frequents open grasslands, sagebrush flats, desert scrub, low foothills surrounding valleys, and fringes of pinyonjuniper habitats. They roost in open areas, usually in a lone tree or utility pole. But there are no breeding records from California (Zeiner et al. 1999). While this species has not been observed within the Mitigation Property, it has been observed within the adjacent Cayetano Creek Mitigation Bank and Cayetano Creek Preserve, and there are nearby CNDDB occurrences. Therefore, it is assumed that the annual grassland habitat found within Mitigation Property provides potential foraging habitat for this species and this species may occur in a foraging capacity.
• Northern Harrier (Circus hudsonius). California Species of Special Concern. Northern harriers require open annual grassland habitats and prefer dense ground vegetation or grasses in which to build nests. They are distinguished from other similar species by their prominent white rump patch. Males are pale gray in color, while females are brown with dark streaking on the breast. These birds are ground nesters and utilize habitats ranging from annual grassland to seasonal wetland for this purpose. This species breeds once per season, with primary females breeding from April to July, and secondary females breeding from May through September. Northern harriers nest on the ground usually preferring dense vegetation clumps for cover such as willows, grasses, sedges, reeds, bulrushes, and Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 15 cattails (Shuford and Gardali 2008). This species has been observed foraging throughout the Eagle Ridge Preserve East, and due to abundant habitat, likely nests within the Preserve as well. Therefore, this species is known to occur in a foraging capacity and is likely to nest within the Mitigation Property as well.
• California Horned Lark (Eremophila alpestris actia) California Watch List. California horned larks are common to abundant resident in a variety of open habitats, usually where trees and large shrubs are absent. They are found from grasslands along the coast and deserts near sea level to alpine dwarf-shrub habitat above the tree line. Their nests are grass-lined, cup-shaped, and located in depressions on the ground in the open. While this species has not been observed within the Mitigation Property, there are nearby CNDDB occurrences, and the annual grassland habitat found throughout the Mitigation Property provides potential habitat for the species. Therefore, California horned lark may occur within the Mitigation Property.
• Prairie Falcon (Falco mexicanus). California Species of Special Concern. This raptor is known to inhabit dry open terrain either in level or hilly habitats. Prairie falcons nest on cliffs, but will forage far afield. Similar in appearance to the female of the smaller merlin (Falco columbarius), it shows a darker facial stripe than the merlin. The wings and tail are pale brown and the underside is cream-colored and heavily spotted. Prey species are birds and small mammals. While this species has not been observed within the Mitigation Property, there are nearby CNDDB occurrences, and the annual grassland habitat provides potential foraging habitat for the species. Therefore, this species may occur in a foraging capacity across the Mitigation Property, but there is no potential for nesting. • White-tailed Kite (Elanus leucurus), California Fully Protected. This small hawk is found among various grassland habitats, including undisturbed, open grasslands, meadows, farmlands, and emergent wetlands. Nests are typically placed near the top of dense tree stands such as oak or willow and are located near foraging areas. White-tailed kites have been frequently observed foraging in and around the Mitigation Property during survey events. There are several large willow trees within the riparian habitat near to the Mitigation Property that could be suitable nest sites for white-tailed kite. Therefore, whitetailed kite is known to occur in a foraging capacity throughout the Mitigation Property and may occur in a nesting capacity.
• Loggerhead Shrike (Lanius ludovicianus). California Species of Special Concern. This small to medium sized bird prefers open habitats with scattered shrubs, trees, posts, fences, utility lines, or other perches. It occurs only rarely in heavily urbanized areas, but is often found in open cropland. These birds use shrubs, dense trees, and thickets of vegetation for nesting sites. This species has been observed foraging in the Mitigation Property, and Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 16 riparian vegetation along Cayetano Creek provides potential nesting habitat. Therefore, this species is known to occur in the Mitigation Property in a foraging capacity and may occur in a nesting capacity.
• Tricolored Blackbird (Agelaius tricolor). California Threatened, California Species of Special Concern. Often found in large flocks of red-winged blackbirds, this species is highly colonial. They breed near fresh water, preferably in emergent wetlands with tall, dense cattails or tules, but also in thickets of willow, blackberry, wild rose, and tall herbs.
Nests may be located a few feet over freshwater or hidden on the ground among low vegetation. They forage among grassland and cropland habitats (Zeiner, et al 1999). There are nearby CNDDB occurrences, and foraging opportunities exist across the Mitigation Property for this species. However, the Mitigation Property is lacking the large marshy habitat that this species requires for nesting. Therefore, this species may occur in a foraging capacity in the Mitigation Property.
• Golden Eagle (Aquila chrysaetos). California Fully Protected. The golden eagle is typically found in open grasslands, pastures, and oak woodland, often near lakes and rivers.
Their plumage is dark brown overall, with some white at the base of the tail, and goldento-blonde feathers on the nape of the neck. The bill and talons are black and the cere (soft membrane that covers the nostrils) and feet are yellow. There are three CNDDB occurrences of this species located near the Mitigation Property. Additionally, golden eagles have been observed foraging within the adjacent Eagle Ridge Preserve during several survey events over the last 10 years, and the large eucalyptus trees at the corner of Highland Road and Manning Road provide potential nesting habitat for this species.
Therefore, the golden eagle is likely to occur throughout the Mitigation Property in a foraging capacity and may nest within or adjacent to the Mitigation Property. • San Francisco Dusky-Footed Woodrat (Neotoma fuscipes annectens). California Species of Concern. The San Francisco dusky-footed woodrat is one of 11 subspecies of the dusky-footed woodrat (N. fuscipes). This subspecies can be found throughout the San Francisco Bay Area in grasslands, scrub, and wooded areas. Evergreen or live oaks and other thick-leaved trees and shrubs are important habitat components for dusky-footed woodrats. Their stick houses are large and are generally placed on the ground against or straddling a log or exposed roots of a standing tree, often in dense brush (CSU Stanislaus 2024). While this species has not been observed on the Mitigation Property, there are nearby CNDDB occurrences, and there is potential habitat within the riparian vegetation along Cayetano Creek. Therefore, this species may occur within the Mitigation Property. • American Badger (Taxidea taxus). California Species of Special Concern. This large member of the weasel family has a flat body with short legs ideally suited to digging Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 17 burrows. Found in open plains, prairies, forests and grasslands, this species feeds on ground squirrels, mice, and gophers. Badgers mate between July and August, but do not give birth until March. While badgers have not been observed within the Mitigation Property, badgers have been observed within the southern portions of Eagle Ridge Preserve East in addition to the adjacent preserve properties. Additionally, the annual grassland habitat found through Proposed Easement Areas 2 and 5 provide suitable habitat for the species.
Therefore, this species may occur within the Mitigation Property. • San Joaquin Kit Fox (Vulpes macrotis). Federally Endangered, California Threatened. The San Joaquin kit fox (SJKF) has a slim body with large, conspicuous ears, and a long, bushy, black tipped tail. It is the smallest canid species in North America. The SJKF lives in annual grassland habitats where friable soils are present in which they may excavate den sites. The general habitat requirement for the kit fox is annual grasslands or grassy open habitat stages with scattered shrubby vegetation. Food requirements for the SJKF are rodents, insects, and even garbage in urbanized areas. Grassland habitats with a large rodent prey base and loose textured soils are thought to provide the best habitat for the SJKF.
There are two historic CNDDB occurrences in the vicinity of the Mitigation Property, dated 1975 and 1989. The grassland habitat is considered to be somewhat suitable for SJKF, especially considering the abundance of ground squirrel burrow complexes. However, due to the lack of recent sightings within the Livermore Valley area, SJKF will most likely occur in the Mitigation Property in a dispersal capacity only.
4.0 IMPLEMENTATION PLAN
This section presents the Implementation Plan for the mitigation habitat. Habitat creation (establishment) will include the construction of intermittent drainage channels, and seasonal wetland habitat. The construction activities will not have any negative impact on any existing aquatic features. Grading and other ground disturbing work will be conducted in such a manner to avoid impacting these existing wetland features with the exception of several wetland inlets consisting of bio-engineered soil/willow lifts.
Prior to implementation of the wetland construction activities, a qualified biologist will conduct surveys to assess the possible presence of species that may be impacted by construction activities.
Work onsite may occur during avian nesting periods; if active nests are observed during wildlife surveys, a suitable buffer will be established to ensure that active nests are not negatively impacted during implementation of construction activities.
4.1 Implementation Approach and Sequence
This section summarizes aquatic feature creation and enhancement activities and sequencing and identifies the responsibilities of the Project Biologist and Restoration Contractor. References to Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 18 sections providing more detailed information on topics covered are included. The Off-Site Mitigation Plan (Attachment 1, Figure 6) and the Landscape Site Plan (Attachment 3) show the areas where habitat creation will occur within the nearby Eagle Ridge Preserve East Property.
Upon completion of construction, installation of fencing, gates and signs will also occur where needed along the perimeter of the Mitigation Property. As-built plan survey activities and reporting will also be conducted at completion of work.
4.2 Site Preparation
4.2.1 Intermittent Drainage and Seasonal Wetland Creation The intermittent drainage and seasonal wetland creation sites will first be mown close to the ground and the upper 4 to 6 inches of soil will be excavated and stockpiled at designated upland locations; this soil will subsequently be spread on the newly created wetlands to provide organic matter and, depending on the timing, may include wetland plant seed material, which would be incorporated into the newly created wetland.
4.2.2 Riparian Habitat Creation
The riparian planting sites will first be mown close to the ground, and any existing non-native invasive vegetation will be removed. Planting locations will be identified by the Project Biologist.
Following the creation of the planting hole, a watering basin will be constructed, all plant material will be installed, and drip irrigation will be connected.
4.2.3 Cayetano Creek Corridor Preservation/Enhancement
The portion of Cayetano Creek that flows through Proposed Easement Area 3 currently contains steeply incised banks with sparse riparian vegetation. The banks of the creek will be planted with native riparian vegetation to provide bank stabilization. This riparian vegetation will be planted to supplement the existing riparian vegetation within this area.
4.3 Grading
The created intermittent drainages and seasonal wetlands will be mass-graded/excavated using a rubber-tired earth mover to form bottom microtopography and side slopes. The top three inches of native soil will be stockpiled onsite and then spread over the surface of the finished created wetlands, to help retain the existing vegetation. The remaining excavated material will be temporarily stockpiled onsite and will be mounded as a balanced cut-and-fill project.
Finish grading will involve grading along the edges of an excavated area to tie into existing Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 19 topography and grading the bottom of the created wetland areas to provide the appropriate flat topographic relief (<1-2 percent slope) for wetland hydrology, soil, and plant development.
Grading activities will be monitored by a grade checker using a hand level to ensure that the constructed wetlands meet the design criteria. The grade checker will be under the supervision of the Project Biologist.
4.4 Revegetation of Disturbed Areas
4.4.1 Intermittent Drainage and Seasonal Wetland Creation The created aquatic features will be seeded with a native seed mix to enhance wetland vegetation growth. Seeding with an appropriate native seed mix (Table 2), coupled with natural colonization by hydrophytic species in close proximity to the created wetland, will eventually bring in a vegetative assemblage of both native and non-native species. The established aquatic features are expected to show significant vegetative growth within 3 to 4 years.
Species selected for the wetland and upland seed mixes were chosen based on their respective wetland indicator statuses and should originate from San Francisco Bay Area ecotypes.
Hydrophytic plant species, or those with an indicator status of FAC, FACW, or OBL, were chosen for the wetland seed mix as they are more suited to frequent saturation and/or inundation. Most of the species selected for the upland seed mix have a wetland indicator status of FAC, FACU, or UPL as they are more suited to dry conditions.
The areas to be seeded will be harrowed after finish grading to achieve a one to two-inch deep friable seed bed. The seed mix will be broadcast at the specified rates and lightly harrowed into the seed bed to achieve good seed to soil contact. Any erosion control BMPs including fabric and straw wattle installation will occur after broadcast of seed but before application of hydromulch.
A mixture of hydromulch, tackifier, and water at appropriate rates will be sprayed with a trailer or truck mounted hydroseeder over the top of the seeded soil bed. Seeding is planned to occur right before the rainy season (i.e., September/October) or early in the rainy season (i.e., November). It is anticipated that wetland plant species will colonize rapidly during the winter/spring following construction.
Table 2. Constructed Intermittent Drainage and Seasonal Wetland Seed Mix Scientific Name Common Name Wetland Status Pounds Per
Acre *
Cyperus eragrostis Tall flat-sedge FACW 4
Eleocharis macrostachya Common spikerush OBL 4
Euthamia occidentalis Western goldenrod FACW 3
Festuca microstachys Pacific fescue FAC 6
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 20 Hordeum brachyantherum Meadow barley FACW 6
Juncus patens Spreading rush FACW 2
Lasthenia californica California goldfields FAC 2
Plagiobathrys nothofulvus Rusty popcorn flower FAC 1
Total 28
* The final seed mix and pounds per acre will be based on native seed availability and pure live seed rates on available stock.
The disturbed upland areas within the Mitigation Property will be subject to seeding with a native seed mix as shown below in Table 3.
Table 3. Preserve Upland Seed Mix (for Upland Disturbed Areas) Scientific Name Common Name Wetland Status Pounds Per
Acre*
Aeclepias fascicularis narrow-leaved milkweed FAC 3
Bromus carinatus California brome UPL 5
Deschampsia
danthonioides annual hair grass FACW 3
Eschoscholzia californica California poppy UPL 2
Elymus triticoides creeping wildrye FAC 3
Festuca microstachys small fescue UPL 5
Hordeum
brachyantherum meadow barley FACW 3
Lupinus bicolor miniature lupine UPL 2
Trifolium willdenovii tomcat clover FACW 1
Total 27
* The final seed mix and pounds per acre will be based on native seed availability and pure live seed rates
on available stock.
4.4.2 Riparian Creation and Cayetano Creek Corridor Preservation/Enhancement The areas of riparian creation and enhancement will be planted with a mix of native plants from container stock and seed mix to enhance vegetation growth. The dominant plant species within the planting mix were chosen to mimic the composition of riparian habitats occurring within the vicinity of the Mitigation Property. All propagules for container stock and willow cuttings will be obtained from populations onsite or from nearby watersheds to ensure that the plant material is adapted to the climatic conditions of the general area. Riparian creation and enhancement areas will be planted with a mix of native species shown in Table 4.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 21 Table 4. Mitigation Property Riparian Plant Palette
Scientific Name Common Name Wetland
Status
Container
Size Quantity*
Acer negundo box elder FACW 5-gal 13
Aesculus californica California buckeye UPL 5-gal 25
Juglans californica California black walnut FACU 5-gal 19 Quercus agrifolia coast live oak UPL 5-gal 13
Quercus lobata valley oak FACU 5-gal 25
Salix lasiolepis, S.
laevigata arroyo willow, red willow FACW 5-gal 31
Tree Sub-Total 126
Baccharis pilularis coyote brush UPL 1-gal 9
Rosa californica California rose FAC 1-gal 43
Rubus ursinus California blackberry FAC 1-gal 43
Sambucus nigra caerulea blue elderberry FACU 1-gal 9
Shrub Sub-Total 104
TOTAL 230
* The final planting pallet mix will be based on native seed availability and pure live seed rates on available stock.
4.5 Implementation Schedule
Construction of the mitigation habitat is planned for 2026 depending on receipt of permits and authorizations. Because the established wetlands will not receive supplemental irrigation water, the seeding timing is important. Due to the unpredictability of the rainy season, the Project Biologist will schedule the seeding. After initial planting and seeding is complete, the site will be maintained and managed by activities described in this MMP.
4.6 Documentation of As-Built Conditions
Within 60-days after wetland construction is complete; a post-construction as-built survey will be prepared and submitted to USACE. This report will include:
• The as-built plan based on the post-construction survey. • Description of construction activities, paying particular attention to any adjustments to the installation plan.
• Photo-documentation of construction activities, as well as identification of permanent photo point locations.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 22 5.0 MAINTENANCE PLAN
Maintenance will be required in order for the ecological functions and values of the site to meet and/or exceed performance expectations. Maintenance shall be considered habitat management where an adaptive management strategy is employed, and multiple aspects of the Mitigation Property are evaluated in order to determine the most feasible and desirable maintenance pathway.
Maintenance activities will be conducted during the establishment period and include invasive species management, installation of exclusion fencing around the mitigation areas, and irrigation.
These maintenance activities are discussed in more detail below.
5.1 Pest Plant and Wildlife Species
Plant and wildlife species considered to be a threat to mitigation will be subject to monitoring and control. Control of nuisance plants may include the use of specific herbicides. Herbicide application is allowed, but only to control small, localized stands of nuisance vegetation. Manual or mechanical control activities will be considered first and will be evaluated for reduced species impacts compared to herbicides. They may also be utilized if an herbicide application is determined not to be feasible or desirable by the Land Manager. Manual methods include hand pull or the use of handheld tools to remove nuisance vegetation. Mechanical methods may include mowing with string trimmer or deck mower as determined by the Land Manager.
The following specifications must be adhered to prior to application of herbicides within the Mitigation Property.
• Herbicide application is allowable but should only be considered feasible after manual and mechanical methods have been ruled out. Application of herbicides will be accomplished in accordance with the following standards:
o Herbicides will be used only by a qualified and licensed applicator (QAL) and only applied according to a licensed pest control advisor (PCA) recommendation. o Under the direction of the Land Manager, a biological monitor will accompany sprayers to prevent impacts to non-target native vegetation that is to be retained. o Target vegetation will only be sprayed using EPA-approved herbicides which are recommended for use in wetlands.
o Small spot treatments will be prioritized over large-scale broadcast methods to minimize the footprint of the herbicide application.
• Manual or mechanical control activities will be considered first and will be evaluated for reduced species impacts compared to herbicides. If manual and mechanical efforts are not Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 23 effective, herbicide may be used to target nuisance plant species found on the Property.
Nuisance species are defined as Cal-IPC high species and moderate broadleaf species (CalIPC 2025). Nuisance species found within the Property include yellow star thistle (Centaurea solstitialis), black mustard, bull thistle, and stinkwort (Dittrichia graveolens).
Studies have shown chlorsulfuron (Telar brand) to be a highly effective pre-emergent herbicide that specifically targets broadleaf species, such as yellow star thistle. Utilizing a selective herbicide such as chlorsulfuron should be prioritized above using a non-selective herbicide such as glyphosate; however, glyphosate may be a viable option as a last resort if all other control efforts are ineffective, or if otherwise determined by adaptive management.
5.2 Fencing
Fencing to exclude unwanted human activity from the Mitigation Property will be maintained in good condition to prevent unauthorized encroachment. Site fencing will consist of five-strand barb wire with t-posts installed at ten feet on center. All new fencing that is constructed will be wildlife friendly in that the top and bottom strands will be smooth, and the bottom strand will be no less than 16 inches above the ground.
5.3 Irrigation Plan
The irrigation system shall be checked regularly, as much as weekly immediately following planting, for malfunction and vandalism. All drip lines and filters shall be flushed as needed.
Emitters must be checked regularly for malfunctions, position of emitter over rootball, and vandalism. Flushing end caps must also be checked regularly. Irrigation for plantings is a temporary tool to help establish the constructed vegetation association. Water shall be decreased every year, and ideally shall not be needed after the third year. Caution shall be exercised not to create lush plants, which would become dependent on regular watering. Deep watering, spaced at the longest time possible before plants show signs of stress, shall be used. This type of watering will encourage plant roots to travel downward into the appropriate water zones in the soil.
6.0 PERFORMANCE STANDARDS
This section presents the performance standards that need to be achieved before the compensatory mitigation activities can be deemed successful. Annual monitoring results will be compared with performance standards to indicate the extent to which the Mitigation Property is developing suitable wetland and riparian habitat. If annual monitoring results fall below performance standards, the cause will be investigated by the Project Biologist and adaptive management recommendations will be proposed to remediate the deficit and attain compliance with the final performance standards.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 24 6.1.1 Seasonal Wetland Performance Standards
The intermittent drainage and seasonal wetland habitat will be monitored, and the results will be compared against performance standards below to ensure the site provides high quality ecological functions and values. There will be six performance standards for the created habitat within the Mitigation Area (Table 5):
• PS-1 - The frequency of inundation and/or saturation will be a minimum of 18 continuous days per year within the established (created) seasonal wetland habitat. • PS-2 - The established (created) wetland habitat will show evidence of ponding in photographs.
• PS-3 – The established (created) habitats will show an increase in vegetative cover over 5 years. The wetland habitats will have at least 75% relative cover by Year 5. In addition to the measurement of relative cover, the percentage of bare ground will be estimated during all monitoring events with results provided in the annual report. • PS-4 – The established (created) habitat will have a minimum of 51 percent relative cover of OBL, FACW, and FAC species by Year 5.
• PS-5 – The established (created) seasonal wetland habitat will meet all three Corps criteria in years that a wetland delineation is performed (Years 3 and 5). The intermittent drainage will have evidence of a defined bed and bank, meeting the Corps requirements for a water feature in years that a wetland delineation is performed (Years 3 and 5). By Year 5, the wetland delineation will show a minimum total of 3.40 acres of seasonal wetland. • PS-6 – Nuisance plant species cover within the seasonal wetland features and constructed intermittent drainage features will not be greater than 5 percent. Nuisance plant species will be those that have a “high” rating by Cal-IPC or are “moderate” broadleaf species.
6.1.2 Drainage Establishment and Caytano Creek Corridor Preservation/Enhancement Performance Standards
The established and enhanced drainage habitat will be monitored, and the results will be compared against performance standards below to ensure the site provides high quality ecological functions and values. The drainage establishment and Cayetano Creek corridor preservation/enhancement areas will be monitored and maintained for a period of 10 years (Years 1-6, 8, and 10). There will be nine performance standards for the established and enhanced drainage habitat within the Mitigation Area (Table 6):
• PS-7 – The established (created) drainages and the preserved/enhanced portions of the Cayetano Creek corridor will show evidence of flow in photographs. • PS-8 – The established (created) drainages and the preserved/enhanced portions of the Cayetano Creek corridor will show an increase in vegetative cover over 10 years. The drainages will have at least 75% relative cover by Year 10. In addition to the measurement Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 25 of relative cover, the percentage of bare ground will be estimated during all monitoring events with results provided in the annual report.
• PS-9 – The established (created) drainages and the preserved/enhanced portions of the Cayetano Creek corridor will have evidence of a defined bed and bank, meeting the Corps requirements for a water feature in years that a wetland delineation is performed (Years 3, 5 and 10). By Year 10, the wetland delineation will show a minimum total of 1,800 linear feet of intermittent drainage establishment.
• PS-10 – The established (created) drainages and the preserved/enhanced portions of the Cayetano Creek corridor will have stable banks and not show signs of an uncharacteristic amount of erosion or sedimentation. An annual survey will be conducted utilizing the California Rapid Assessment Method (CRAM) Channel Stability methodology, as is described within the CRAM Riverine Wetlands Field Book ver. 6.1. Each established and enhanced drainage feature will show a predominance of indicators of channel equilibrium. • PS-11 – Turbidity monitoring will occur annually after a large rain event (<1 inch in 24 hours) within each of the established (created) drainages and the preserved/enhanced portions of the Cayetano Creek corridor. Due to the shallow depths of the drainage features, water turbidity will be measured using a t-tube. A t-tube is a 60-centimeter-long transparent tube with a stopper and release valve at the bottom and a black and white symbol at the bottom. To measure clarity, the tube is filled with water from the sampling location and as the user looks down into the tube, they gradually release water through the valve until the black and white symbol is visible. The depth of the water when the symbol becomes visible is recorded in centimeters. For transparency, a water body is out of compliance with a 25 nephelometric turbidity unit (NTU) standard if a t-tube value is less than 20 centimeters. • PS-12 – The riparian plantings within the Cayetano Creek Corridor Preservation/Enhancement areas will have 80% establishment rate by Year 3. • PS-13 – An annual botanical survey will be conducted throughout the Cayetano Creek corridor preservation/enhancement planting areas. The survey will determine the number of live, dead, and missing plants from those originally installed. Each plant will be assigned a health and vigor ration of healthy, unhealthy, or dead. In Years 1-6 the riparian plantings will show a minimum of 90 percent to be alive and healthy. In Year 8 the riparian plantings will show a minimum of 85 percent to be alive and healthy. In Year 10 the riparian plantings will show a minimum of 80 percent to be alive and healthy. • PS-14 – Average height of each tree species installed in the Mitigation Area will exhibit an increasing trend overtime. By Year 10 the average height for each tree species will meet the success criteria shown below:
o Coast live oak – 6 FT
o Valley oak – 8 FT
o Red willow – 10 FT
o Arroyo willow – 10 FT
• PS-15 – An annual botanical survey will be conducted throughout the riparian planting Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 26 areas. The survey will determine the approximate percent cover of the riparian plantings in relation to the mitigation area. In Year 6, the riparian plantings shall attain 40% cover. This percentage will increase to 75% cover in Year 10. In addition to the measurement of relative cover, the percentage of bare ground will be estimated during all monitoring events with results provided in the annual report.
6.1.3 Riparian Establishment Performance Standards
The riparian planting areas will be monitored, and the results will be compared against performance standards below to ensure the site provides high quality ecological functions and values. The riparian Mitigation Areas will be monitored and maintained for a period of 10 years (Years 1-6, 8, and 10). This duration is necessary because of the naturally slow growth rate of many of the planted trees and shrubs. There will be four performance standards for the created habitat within the Mitigation Area (Table 7):
• PS-16 – The planted areas will have 80% establishment rate by Year 3 • PS-17 – An annual botanical survey will be conducted throughout the riparian planting areas. The survey will determine the number of live, dead, and missing plants from those originally installed. Each plant will be assigned a health and vigor ration of healthy, unhealthy, or dead. In Years 1-6 the riparian plantings will show a minimum of 90 percent alive and healthy. In Year 8 the riparian plantings will show a minimum of 85 percent alive and healthy. In Year 10 the riparian plantings will show a minimum of 80 percent alive and healthy
• PS-18 – Average height of each tree species installed in the Mitigation Area will exhibit an increasing trend overtime. By Year 10 the average height for each tree species will meet the success criteria shown below
o Coast live oak – 6 FT
o Valley oak – 8 FT
o Red willow – 10 FT
o Arroyo willow – 10 FT
• PS-19 – An annual botanical survey will be conducted throughout the riparian planting areas. The survey will determine the approximate percent cover of the riparian plantings in relation to the mitigation area. In Year 6, the riparian plantings shall attain 40% cover. This percentage will increase to 75% cover in Year 10. In addition to the measurement of relative cover, the percentage of bare ground will be estimated during all monitoring events with results provided in the annual report.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 27 7.0 MONITORING AND REPORTING
Monitoring and reporting for performance will occur for a minimum of 5-years for wetlands, and 10-years for drainages and riparian habitat or until attainment of performance standards. If performance standards are not met by the end of the stated monitoring and management period for a given habitat type, then monitoring can be extended into future years until performance standards are attained, remedial actions may occur, or compensatory mitigation may be required through another mitigation mechanism to make up the difference.
The monitoring objectives:
1. Track habitat progress towards meeting the performance standards, and
2. Identify and remedy any problems that could impact the success of the mitigation effort and/or compromise the ecological functions and values of the site.
The monitoring protocol and results will be reviewed annually. Adjustments to monitoring procedures may be required as the site changes over time, or if logistical problems render a procedure unduly difficult to conduct. Such adjustments will be discussed with the regulatory agencies as necessary. After reviewing the monitoring reports, the regulatory agencies may also have suggestions for adjusting the monitoring program. Regulatory agency suggestions will be reviewed and, if appropriate, incorporated into the following year's monitoring program. The key is to anticipate that the monitoring program may need occasional adjustments to remain accurate, complete, and feasible.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 28 Table 5: Seasonal Wetland Performance Standards
Category Performance Standard Establishment Year
Year 1 Year 2 Year 3 Year 4 Year 5
PS-1 Wetland
Hydrology
The wetlands will show evidence
of wetland hydrology through
inundation (ponding) and/or
saturated soil conditions.
The seasonal wetland habitats will be saturated or inundated for at least 18 days during an average rainfall year.
PS-2
Wetland
Hydrology
Data will be collected by direct
observation, photo
documentation, and/or water
measurement devices (staffgauges) placed in the selected The established (created) wetland habitat will show evidence of ponding in photographs.
PS-3
Vegetation
Percent Cover
The wetlands will have
germination and growth of a
variety of plant species and at
appropriate overall cover levels.
Total area coverage
may be sparse after
first year. Presence
of young shoots for
seeded species.
The wetlands will
have at least 50%
relative vegetative
cover.
The wetlands will
have at least 60%
relative vegetative
cover.
The wetlands will
have at least 70%
relative vegetative
cover.
The wetlands will have
at least 75% relative
vegetative cover.
PS-4
Wetland
Species
The seasonal wetlands will be
dominated by hydrophytic
vegetation (OBL, FACW, and
FAC).
A minimum of 51
percent relative cover
of OBL, FACW, and
FAC species.
PS-5
Wetland
Verification
A wetland delineation will be
conducted with a sufficient
number of paired sampling
points to differentiate the
boundary between upland and
wetland.
Conduct a wetland
delineation.
Conduct a wetland
delineation.
Demonstrate that at
least 3.40 acres of
seasonal wetland occur
within the mitigation
area.
PS-6
Invasive
species
The constructed features will not
be dominated by non-native
invasive vegetation.
Total relative cover of non-native invasive plant species (all plant species with “High” impact rankings by Cal-IPC and all broadleaf species with “moderate” rating) is no more than 5 percent within newly constructed features.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 29 Table 6: Established Drainage and Cayetano Creek Corridor Preservation/Enhancement Performance Standards Category Performance Standard
Establishment Year
Years 1-6 Year 8 Year 10
PS-7 Drainage
Hydrology
Data will be collected by direct
observation or photo
documentation.
The established (created) drainages and Cayetano Creek Corridor Preservation/Enhancement areas will show evidence of flow in photographs
PS-8 Vegetation
Percent Cover
The drainages will have
germination and growth of a
variety of plant species at
appropriate relative cover levels.
Coverage may be sparse in first
year, but presence of young
shoots for seeded species. Seeded
species will have at least 50%
relative cover.
Seeded species will have at least
70% relative cover.
Seeded species will have at least
75% relative cover.
PS-9 Wetland
Verification
A wetland delineation will be
conducted with a sufficient
number of transects to determine
the ordinary high water mark.
A wetland delineation will be
conducted in Years 3 and 5.
Conduct a wetland delineation.
Demonstrate that at least 1,800
linear feet of intermittent
drainages were created.
PS-10 Bank
Stabilization
The established and enhanced
drainages will be monitored
utilizing CRAM methodology for
bank stabilization.
Annual surveys will show a predominance of indicators of channel equilibrium.
PS-11 Turbidity
Monitoring
Turbidity within the established
and enhanced drainages will be
monitored annually after a large
rain event (<1 inch in 24 hours).
Annual monitoring for turbidity monitoring will have a t-tube value of 20 centimeters or greater.
PS-12 Plant
Establishment
Annual monitoring to ensure the
health of riparian plantings.
The riparian plantings within the
Cayetano Creek Corridor
Preservation/Enhancement areas
will have 80 percent
establishment rate by Year 3.
PS-13 Riparian
Species Survival
Annual botanical surveys will be
conducted to determine number
of live, dead, and missing plants
from those originally installed.
Each plant that is alive during the
survey will be assigned a health
and vigor rating of healthy,
A minimum of 90 percent of
plantings alive and healthy.
A minimum of 85 percent of
plantings alive and healthy.
A minimum of 80 percent of
plantings alive and healthy.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 30 unhealthy, or dead.
PS-14 Tree
Height
Annual botanical surveys will be
conducted to determine the
approximate height of each
planted tree.
Average height of each tree species installed in the Mitigation Area will exhibit an increasing trend overtime.
Average height for each species
as follows: coast live oak (6 FT),
valley oak (8 FT), red willow (10
FT), arroyo willow (10 FT).
PS-15 Riparian
Species Cover
Annual botanical surveys will be
conducted to determine the
approximate relative cover of all
riparian plantings.
Approximate relative cover will
exhibit an increasing trend
overtime.
A minimum of 40 percent
relative cover of riparian species.
A minimum of 75 percent
relative cover of riparian species.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 31 Table 7: Riparian Habitat Establishment Performance Standards Category Performance Standard Establishment Year
Years 1-6 Year 8 Year 10
PS-16 Plant
Establishment
Regular monitoring during the
first three years to ensure the
health of riparian plantings.
Total establishment rate of
planted riparian species will have
80 percent establishment rate by
Year 3.
PS-17
Riparian
Species
Survival
Annual botanical surveys will be
conducted to determine number
of live, dead, and missing plants
from those originally installed.
Each plant that is alive during
the survey will be assigned a
health and vigor rating of
healthy, unhealthy, or dead.
A minimum of 90 percent of
plantings alive and healthy.
A minimum of 85 percent of
plantings alive and healthy.
A minimum of 80 percent of
plantings alive and healthy.
PS-18
Tree
Height
Annual botanical surveys will be
conducted to determine the
approximate height of each
planted tree.
Average height of each tree species installed in the Mitigation Area will exhibit an increasing trend overtime.
Average height for each species as
follows: coast live oak (6 FT),
valley oak (8 FT), red willow (10
FT), arroyo willow (10 FT).
PS-19 Riparian
Species Cover
Annual botanical surveys will be
conducted to determine the
approximate cover of all riparian
plantings.
Approximate relative cover will
exhibit an increasing trend
overtime.
A minimum of 40 percent relative
cover of riparian species.
A minimum of 75 percent relative
cover of riparian species.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 32 7.1 Intermittent Drainage and Seasonal Wetland Monitoring Hydrology data will be collected from the established (created) habitat to coincide with the California rainy season (i.e., typically recognized as occurring between Sept/Oct to Apr/May). The first hydrology data collection event will occur with the onset of fall rains no more than two weeks after the first soaking rain event (i.e., one inch of rain in 24 hours). Hydrology monitoring will occur at least monthly during the rainy season and will not end until bankfull ponding is documented with a photograph and/or at least 18 days of ponding/saturation has occurred. Monthly hydrology monitoring events will occur until the wetlands are totally dry, presumably early- or mid-summer.
At each data collection event, water depths will be estimated or recorded from staff gauges which will be marked at one-inch increments and placed in the bottoms of the habitat features they are intended to provide data for or collected by hand with a measuring stick or ruler.
Monitoring of wetland vegetation using randomly placed one square meter quadrats will occur during the spring monitoring event. Quadrats will be placed randomly within the seasonal wetland habitats with five quadrats placed within each wetland feature. Due to the relatively small size of each of the wetland features, this should provide an adequate sample size to determine vegetation composition. Each plant species occurring within the quadrat will be recorded and assigned a relative cover value. The relative percent cover of bare ground and thatch will also be recorded from each quadrat. Photos will be taken of the quadrats and a representative sample will be included in annual monitoring reports.
Photographic monitoring will also occur at each wetland data collection event from fixed photo points and any other relevant areas. Photos of actively ponded wetlands will be taken and provided in monitoring reports. Annual precipitation data will be obtained from the closest climatological station and included in monitoring reports. These photo points will be established after construction of the features, to ensure that they accurately capture the features that are created. A minimum of 30 photo points will be established to sufficiently characterize the mitigation features.
Vegetation, soil, and hydrologic conditions will be monitored using the USACE’ 1987 Wetlands Delineation Manual, the Corps’ September 2008 Regional Supplement to Corps of Engineers Wetland Delineation Manual: Arid West (Version 2.0) (Arid West Supplement), and relevant USACE guidance documents whereby field observations will be made in the wetlands during the rainy season until the wetland soil and hydrology criteria are met. The percentage and depth of ponded water and/or soil saturation will be noted during monitoring visits. This information will be recorded on the Arid West field data sheet.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 33 7.2 Riparian Creation and Enhancement Monitoring
Surveys to identify the health and vigor of the riparian plantings will be conducted annually each summer or fall. The surveys will identify the species of each riparian planting and assign it a health rating of “healthy”, “unhealthy”, or “dead”. If a riparian planting appears to be unhealthy, then possible remedies will be identified and implemented. If the number of living and healthy plantings falls below the performance standards then replanting efforts will be explored.
7.3 Non-Native Invasive Vegetation Monitoring
Plant species designated by the California Invasive Plant Council (Cal-IPC - https://www.calipc.org/plants/inventory/) to be plant pests (impact rating of “high”) will not be allowed to colonize and become established within the Mitigation Property. The relative percent cover of non-native invasive species will come from wetland delineation vegetative data, direct observation, and/or photo documentation. Any problematic or new stands of non-native invasive vegetation will be photographed and described in the monitoring report along with recommendations for control and/or eradication.
7.4 Photo Documentation
Photo documentation will occur during all monitoring years from permanent photo stations that will be established during construction and shown on the as-built plan drawings. Photo station locations will be selected to illustrate year-to-year progress in relation to the existing habitat. Photo locations will be recorded with GPS equipment to ensure photos will be taken from the same location each year. Photographs will also be taken to record any events that may have a significant effect on the success of restoration, such as flood, fire, or vandalism. The location and direction of view of the photo stations will be provided with all monitoring reports. Color photocopies of the permanent photo stations will be included as an attachment in monitoring reports. These photo points will be established after construction of the features, to ensure that they accurately capture the features that are created. A minimum of 30 photo points will be established to sufficiently characterize the mitigation features.
7.5 Annual Report
Habitat establishment monitoring reports summarizing the results of the monitoring effort will be submitted to the regulatory agencies by December 31 every year for Years 1-6, 8, and Year 10.
The annual report will document the degree to which the Mitigation Property is meeting the performance standards. The monitoring reports will describe any deficiencies in attaining and maintaining performance standards and any remedial action proposed, approved, or performed. If Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 34 remedial action(s) have been completed, the annual report will also evaluate the effectiveness of that action.
A final monitoring report summarizing the mitigation project and evaluating the site's overall performance will be prepared and submitted at the end of monitoring (Year 10). The final annual report will include a count and assessment of species. A final field visit will be conducted to verify that onsite conditions are consistent with information documented in the annual report.
The annual report will include the following information.
Project Overview (1 page)
a. Agency Permit Numbers
b. Name of party responsible for conducting the monitoring and the date(s) the inspection was conducted.
c. A brief paragraph describing the purpose of the approved project, acreage and type of resources impacted; and mitigation acreage and type of resources authorized to compensate for the impacts.
d. Written description of the location, any identifiable landmarks of the compensatory mitigation project including information to locate the site perimeter(s), and coordinates of the mitigation site (expressed as latitude, longitudes, UTMs, state plane coordinate system, etc.).
e. Dates the compensatory mitigation project commenced and/or was completed. f. The time period covered (i.e., the dates “from” and “to”). g. Short statement on whether the performance standards are being met. h. Dates of any recent corrective or maintenance activities conducted since the previous report submission.
i. Specific recommendations for any additional corrective or remedial actions.
Requirements (1 page)
a. List the monitoring requirements and performance standards specified in the approved mitigation plan or special conditions of agency permits. b. Evaluate whether the compensatory mitigation project site is successfully achieving the approved performance standards or trending towards success. (Use a table to present this information).
c. Management tasks accomplished during the year shall be identified. All herbicide use shall be reported. The type of herbicide, target species, frequency and duration of use, and minimization measures will be reported.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 35 Summary Data (4 pages maximum)
a. Present summary data to substantiate the success and/or potential challenges associated with the compensatory mitigation project.
b. Include photo documentation to support the findings and recommendations in the monitoring report and to assist the Project Biologist in assessing whether the compensatory mitigation project is meeting applicable performance standards for that monitoring period. Format submitted photos to print on a standard 8 ½” x 11” paper. Show date and clearly label photos with the direction from which the photo was taken.
Identify the photo stations on the appropriate maps.
Maps and Plans (3 pages maximum)
a. Provide maps that show location of compensatory mitigation site relative to other landscape features; mitigation site perimeter; habitat types; locations of photo reference points, transects, sampling data points, and other pertinent features. Format maps/diagrams to print on 8.5” x 11’ paper.
Include a legend and photo locations.
Conclusions (1 page)
a. Include statement that describes the conditions of the compensatory mitigation project. b. If performance standards are not being met, explain the difficulties and potential remedial actions together with a timetable for correction.
8.0 ADAPTIVE MANAGEMENT/REMEDIAL MEASURES
Adaptive management is a strategy to deal with unexpected changes in site conditions, responsibilities, or performance of the site so that the compensatory mitigation project achieves its objectives and ecological performance standards.
Potential problems that may trigger a need for adaptive management include failure to attain performance standards, fire, substantial infestation by non-native plants and animals, and unanticipated anthropogenic problems such as large-scale trespassing and vandalism.
The Project Biologist will regularly analyze site progress as part of monitoring and reporting and will suggest remedial measures to address unforeseen changes in site conditions or other components of the mitigation project.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 36 If the annual monitoring results indicate that the site is falling below performance threshold values, then remedial actions will be implemented and funded by the Permittee of the mitigation project.
Remedial actions may include but are not limited to: hiring an alternative hydrological, geotechnical, or civil engineer to redesign the wetlands, replacement planting, additional watering, nuisance plant control and eradication, monitoring for additional years, and mitigating for the project at an alternative site.
Quarry Lakes Parkway Management Area Habitat Mitigation Monitoring Plan 37 9.0 REFERENCES AND LITERATURE CONSULTED
California Department of Fish and Wildlife (CDFW) Natural Diversity Data Base (CNDDB). 2025. Computer listings and map locations of historic and current recorded occurrences of special-status species and natural communities of special concern for USGS 7.5-minute quadrangle maps.
California Invasive Plant Council (Cal-IPC). 2025. Inventory of Invasive Plants. Available online at https://www.cal-ipc.org/plants/inventory/. Accessed September 19, 2025.
California State University (CSU) Stanislaus. 2024. San Francisco Dusky-Footed Woodrat.
Endangered, Threatened, and Candidate Species Manual. Available online at https://esrp.csustan.edu/projects/lsm2/. Accessed on January 22, 2024.
Koch, J., J. Strange, and P. Williams. 2012. Bumble Bees of the Western United States. A product of the U.S. Forest Service and the Pollinator Partnership with funding from the National Fish and Wildlife Foundation. Available online
at https://www.xerces.org/sites/default/files/2018-05/12- 053_01_Western_BB_guide.pdf.
Accessed January 23, 2024.
NOAA (National Oceanic and Atmospheric Administration). 2025. Climatological precipitation summary for San Francisco Bay Area. National Weather Service. Monterey, CA. Available online at https://www.weather.gov/wrh/Climate?wfo=mtr. Accessed September 19, 2025.
Natural Resources Conservation Service (NRCS), U.S. Department of Agriculture. 2025. Web Soil Survey. Available online at https://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/survey/.
Accessed on September 19, 2025.
Sawyer J. T. Keeler-Wolf, and K. Evans. 2009. A Manual of California Vegetation, Second Edition. California Native Plant Society.
Zeiner, D.C., W.F. Laudenslayer, Fr., K.E. Mayer, and M. White, eds. 1988- 1990 (Updated 1999).
California’s Wildlife. Vol I -III. California Department of Fish and Wildlife, Sacramento, California.
Attachment 1
Figures
^_
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 1: Regional Map
Quarry Lakes Parkway Management Area
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California Revision Date: 03/27/2026 0 2 4 8
Miles I Scale: 1:253,440 1 in = 4 miles
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig1_RegionalMap_ERE_QuarryLakesMitigation_03272026.mxd Print at 8.5" x 11" ^_ Preserve Location
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 2: Vicinity Map
Quarry Lakes Parkway Management Area
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California Revision Date: 09/19/2025 0 1,000 2,000 4,000
Feet I Scale: 1:24,000 1 in = 2,000 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig2_VicinityMap_ERE_QuarryLakesMitigation_03272026.mxd Print at 8.5" x 11"
Eagle Ridge East Preserve Boundary
Nielson Property
Quarry Lakes Parkway Mitigation Boundary
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 3: USGS Topographic Map
Quarry Lakes Parkway Management Area
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California Revision Date: 01/16/2025 0 1,000 2,000 4,000
Feet I Scale: 1:24,000 1 in = 2,000 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig3_TopoMap_ERE_QuarryLakesMitigation_03272026.mxd Print at 8.5" x 11"
Eagle Ridge East Preserve Boundary
Nielson Property
Quarry Lakes Parkway Mitigation Boundary
Tassajara 7.5' USGS Quad
37.756400°, -121.789800°
S18, T2S, R2E
Manning Road
Highland Road
Manning Road
Proposed
Easement
Area 1
Proposed
Easement
Area 2
Proposed
Easement
Area 3
Proposed
Easement
Area 4
Proposed
Easement
Area 5
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 4: Aerial Map
Quarry Lakes Parkway Management Area
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California Revision Date: 03/27/2026 0 350 700 1,400
Feet I Scale: 1:8,400 1 in = 700 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig4_AerialMap_ERE_QuarryLakesMitigation_03272026.mxd Print at 8.5" x 11"
Eagle Ridge East Preserve Boundary
Nielson Property
Quarry Lakes Parkway Mitigation Boundary
ED 3
ED 2
ED 1
ID 1b
ID 1d
ID 2
ID 1c
ID 1a
SW 1
SW 2
SW 3
SW 4 SW 5
SW 6
SW 7
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 5:
Corps Jurisdictional Delineation Map
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Created on: 10/02/2025
Revised on: 01/29/2026
0 175 350 700
Feet
Scale: 1:4,200 1 in = 350 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig5_JDMap_cover_ERE_01292026.mxd Print at 11" x 17"
Eagle Ridge Preserve East Survey Area
Map Pages
Potential Aquatic Features
Ephemeral Drainage (0.09 ac, 695 lf)
Intermittent Drainage (0.56 ac, 3,711 lf)
Seasonal Wetland (1.19 ac)
Made in accordance with the Updated Map and Drawing
Standards for the South Pacific Division Regulatory Program, as amended on February 10, 2016, by: Jason Deters, Project Manager Enforcement and Special Projects UnitU.S. Army
Corps of Engineers South Pacific Division1325 J Street, Room 1350 Sacramento, California 95814-2922
Coordinate System:
NAD 1983 2011 StatePlane California III FIPS 0403 Ft US Projection: Lambert Conformal Conic
Datum: NAD 1983 2011 // Units: Foot US
µ
4 3
1 2
!(
!(
!(
!(
!(
!(
!(
!( !(
!( !(
!(
!(
ID 2
(0.14 ac, 974 lnft)
SW 3
(0.21 ac)
SW 4
(0.25 ac)
SW 5
(0.21 ac)
SW 6
(0.19 ac)
SW 7
(0.16 ac)
13A
16A
17A
21A
21B
22A
22B
23B 23A
24A 24B
25A
25B
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 5:
Corps Jurisdictional Delineation Map
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Created on: 10/02/2025
Revised on: 01/29/2026
0 75 150 300
Feet
Scale: 1:1,800 1 in = 150 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig5_JDMap_pages_ERE_01292026.mxd Print at 11" x 17"
Eagle Ridge Preserve East Survey Area
Culverts
Sample Points
!( Upland Sample Point
!( Wetland Sample Point
Transect Locations
Potential Aquatic Features
Ephemeral Drainage (0.09 ac, 695 lf)
Intermittent Drainage (0.56 ac, 3,711 lf)
Seasonal Wetland (1.19 ac)
Made in accordance with the Updated Map and Drawing
Standards for the South Pacific Division Regulatory Program, as amended on February 10, 2016, by: Jason Deters, Project Manager Enforcement and Special Projects UnitU.S. Army
Corps of Engineers South Pacific Division1325 J Street, Room 1350 Sacramento, California 95814-2922
Coordinate System:
NAD 1983 2011 StatePlane California III FIPS 0403 Ft US Projection: Lambert Conformal Conic
Datum: NAD 1983 2011 // Units: Foot US
µ
4 3
1 2
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
!(
ID 1a
(0.07 ac, 844 lnft)
SW 2
(0.11 ac)
ID 1b
(0.19 ac, 1,253 lnft)
ID 1c
(<0.01 ac, 25 lnft)
ID 1d
(0.16 ac, 615 lnft)
ED 1
(0.01 ac, 242 lnft)
1A
2A
3A
4A
5A
6A
6B
6C
8A
9A
10A
11A
7A
15A
18A
14A
3B
5B
4B
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 5:
Corps Jurisdictional Delineation Map
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Created on: 10/02/2025
Revised on: 01/29/2026
0 75 150 300
Feet
Scale: 1:1,800 1 in = 150 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig5_JDMap_pages_ERE_01292026.mxd Print at 11" x 17"
Eagle Ridge Preserve East Survey Area
Culverts
Sample Points
!( Upland Sample Point
!( Wetland Sample Point
Transect Locations
Potential Aquatic Features
Ephemeral Drainage (0.09 ac, 695 lf)
Intermittent Drainage (0.56 ac, 3,711 lf)
Seasonal Wetland (1.19 ac)
Made in accordance with the Updated Map and Drawing
Standards for the South Pacific Division Regulatory Program, as amended on February 10, 2016, by: Jason Deters, Project Manager Enforcement and Special Projects UnitU.S. Army
Corps of Engineers South Pacific Division1325 J Street, Room 1350 Sacramento, California 95814-2922
Coordinate System:
NAD 1983 2011 StatePlane California III FIPS 0403 Ft US Projection: Lambert Conformal Conic
Datum: NAD 1983 2011 // Units: Foot US
µ
4 3
1 2
!(
ED 3
(0.03 ac, 242 lnft)
20A
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 5:
Corps Jurisdictional Delineation Map
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Created on: 10/02/2025
Revised on: 01/29/2026
0 75 150 300
Feet
Scale: 1:1,800 1 in = 150 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig5_JDMap_pages_ERE_01292026.mxd Print at 11" x 17"
Eagle Ridge Preserve East Survey Area
Culverts
Sample Points
!( Upland Sample Point
!( Wetland Sample Point
Transect Locations
Potential Aquatic Features
Ephemeral Drainage (0.09 ac, 695 lf)
Intermittent Drainage (0.56 ac, 3,711 lf)
Seasonal Wetland (1.19 ac)
Made in accordance with the Updated Map and Drawing
Standards for the South Pacific Division Regulatory Program, as amended on February 10, 2016, by: Jason Deters, Project Manager Enforcement and Special Projects UnitU.S. Army
Corps of Engineers South Pacific Division1325 J Street, Room 1350 Sacramento, California 95814-2922
Coordinate System:
NAD 1983 2011 StatePlane California III FIPS 0403 Ft US Projection: Lambert Conformal Conic
Datum: NAD 1983 2011 // Units: Foot US
µ
4 3
1 2
!(
!(
!(
!(
!(
!(
ID 1d
(0.16 ac, 615 lnft)
ED 1
(0.01 ac, 242 lnft)
ED 2
(0.04 ac, 211 lnft)
SW 1
(0.06 ac)
12B
12A
10A
11A
18A
19A
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 5:
Corps Jurisdictional Delineation Map
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Created on: 10/02/2025
Revised on: 01/29/2026
0 75 150 300
Feet
Scale: 1:1,800 1 in = 150 feet
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig5_JDMap_pages_ERE_01292026.mxd Print at 11" x 17"
Eagle Ridge Preserve East Survey Area
Culverts
Sample Points
!( Upland Sample Point
!( Wetland Sample Point
Transect Locations
Potential Aquatic Features
Ephemeral Drainage (0.09 ac, 695 lf)
Intermittent Drainage (0.56 ac, 3,711 lf)
Seasonal Wetland (1.19 ac)
Made in accordance with the Updated Map and Drawing
Standards for the South Pacific Division Regulatory Program, as amended on February 10, 2016, by: Jason Deters, Project Manager Enforcement and Special Projects UnitU.S. Army
Corps of Engineers South Pacific Division1325 J Street, Room 1350 Sacramento, California 95814-2922
Coordinate System:
NAD 1983 2011 StatePlane California III FIPS 0403 Ft US Projection: Lambert Conformal Conic
Datum: NAD 1983 2011 // Units: Foot US
µ
4 3
1 2
Proposed
Easement
Area 1
Proposed
Easement
Area 2
Proposed
Easement
Area 3
Proposed
Easement
Area 4
Proposed
Easement
Area 5
193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 6: Off-Site Mitigation Map
Quarry Lakes Parkway Management Area
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Eagle Ridge Preserve East Boundary
Nielson Property
Quarry Lakes Parkway Mitigation Boundary
Existing Cayetano Creek Corridor
Quarry Lakes Proposed Mitigation
Annual Grassland Preservation (18.00 ac)
Drainage Creation (0.20 ac, 1,800 lf)
Riparian Creation (1.00 ac)
Cayetano Creek Corridor Preservation/Enhancement (0.38 ac) Seasonal Wetland Creation (3.40 ac)
Upland Swale Preservation (0.04 ac)
Ponded Portion of Seasonal Wetland Creation
Map Revision Date: 3/26/2026
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig6_OffSiteMitigation_ERE_QuarryLakesMitigation_03262026.mxd 0 800 1,600
Feet I Scale: 1:9,600 1 in = 800 feet
Print at 8.5" x 11"
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193 Blue Ravine Road, Ste. 165
Folsom, CA 95630
Phone: (916) 985-1188
Figure 7: Nearby Special-Status Species Occurrences
Quarry Lakes Parkway Management Area
Eagle Ridge Preserve East
Contra Costa & Alameda Counties, California
Eagle Ridge Preserve East Boundary
Nielson Property
Quarry Lakes Parkway Mitigation Boundary
Adjacent Preserve Properties
Olberding Special-Status Species Observations
^_ Badger
^_ Burrowing Owl
^_ California Red-Legged Frog
^_ California Tiger Salamander
CNDDB Occurrences
burrowing owl
California red-legged frog
California tiger salamander - central California DPS
Map Revision Date: 9/30/2025
Document Path: C:\Project Work\Eagle Ridge East\GIS\mxd\Fig7_TargetSpecies_ERE_QuarryLakesMitigation_09302025.mxd 0 2,000 4,000
Feet I Scale: 1:24,000 1 in = 2,000 feet
Print at 8.5" x 11"
Attachment 2
Representative Photographs
Quarry Lakes Parkway Management Area – March 2026
1. Photo one is taken from a hill slope near the northwestern portion of Eagle Ridge East Preserve, facing northeast. The photo shows the area that will be Proposed Easement Area 1 and the surrounding habitat. Photo taken November 13, 2024.
2. Photo two is taken from the eastern portion of Proposed Easement Area 2, facing west. The photo shows the grazed annual grassland habitat that makes up this Proposed Easement Area. Photo taken September 16, 2025.
Quarry Lakes Parkway Management Area – March 2026
3. Photo three shows a portion of Cayetano Creek that flows through Proposed Easement Area 3, facing north. The photo shows the box culvert that flows under Highland Road, hydrologically connecting Proposed Easement Area 2 with Cayetano Creek. Photo taken December 17, 2025.
4. Photo four shows the existing bank above the portion of Cayetano Creek that flows through Proposed Easement Area 3, facing north. It is proposed to construct seasonal wetlands and intermittent drainages adjacent to the channel in this area. Photo taken September 16, 2025.
Quarry Lakes Parkway Management Area – March 2026
5. Photo five shows a portion of Cayetano Creek that flows through Proposed Easement Area 4, facing east. Photo taken April 8, 2021.
6. Photo six shows a portion of Cayetano Creek that flows through Proposed Easement Area 4, facing west. It is proposed to construct seasonal wetlands and intermittent drainages adjacent to the channel in this area. Photo taken April 8, 2021.
Quarry Lakes Parkway Management Area – March 2026
7. Photo seven shows a portion of Cayetano Creek that flows through Proposed Easement Area 4, facing southwest. Photo taken March 6, 2025.
8. Photo eight shows the annual grassland habitat that makes up Proposed Easement Area 5, facing east. Photo taken December 17, 2025.
Attachment 3
Landscape Plan Set
© 2026 Microsoft Corporation © 2026 Maxar ©CNES (2026) Distribution Airbus DS DRAFT
This document shall not be used for
construction unless signed and sealed for
construction. Sheet No.
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Title
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Plot Date: 27 February 2026 - 11:20 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
Date
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MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ense No. 5 873
STA TE OF CA LIFORNIA
Signature
Renewal Date
Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
COVER SHEET
L-001 1
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
AREA MAP
MANNING RANCH SHEET INDEX
QUARRY LAKES PARKWAY
HABITAT DEVELOPMENT
PROJECT
LIVERMORE, CA
FEBRUARY, 2026
NOT TO SCALE
N
LOCATION MAP
SAN
FRANCISCO
LOS ANGELS
MITIGATION AREA 'A'
CONTRA COSTA COUNTY
SHEET INDEX
SHEET
NUMBER
SHEET TITLE
L-001 COVER SHEET
L-002 OVERVIEW PLAN
L-101 CONCEPT HABITAT DEVELOPMENT PLAN
L-102 CONCEPT HABITAT DEVELOPMENT PLAN
L-301 TYPICAL SECTIONS
L-302 TYPICAL SECTIONS
L-501 CONSTRUCTION NOTES & DETAILS
L-502 PLANTING NOTES, DETAILS, & SCHEDULES
ALAMEDA COUNTY
MANNING ROAD
HIGHLAND ROAD
ALAMEDA & CONTRA COSTA COUNTY
MITIGATION AREA 'B'
MITIGATION
AREA 'C'
MANNING RANCH
APN: 903-0002-001-01
132.67 AC
BASE DATA SOURCE INFORMATION
AERIAL IMAGERY MICROSOFT BING MAPS, ONLINE SATELLITE
IMAGERY STREAM USING AUTODESK CONNECTION
EXISTING CONTOURS 2019 - 2021 USGS LIDAR: ALAMEDA COUNTY, Ca
POINT CLOUD DATA SOURCE
ESTIMATED POINT SPACING: 0.1 m
HORIZONTAL ACCURACY: 14 cm
VERTICAL ACCURACY: 2 cm (OPEN TERRAIN)
BOUNDARY LAND TITLE MAP, DATED NOVEMBER 9, 2023
RICHARD MADDOCK, PLS 8131
EAGLE RIDGE
PRESERVE
CAYETANO
CREEK
MITIGATION
BANK
PRIMARY SOIL FILL /
SPOIL LOCATION
PRIMARY SOIL FILL /
SPOIL LOCATION
SECONDARY SOIL FILL /
SPOIL LOCATION
CARNEAL ROAD
COLLIER CANYON ROAD
© 2025 Microsoft Corporation © 2025 Maxar ©CNES (2025) Distribution Airbus DS © 2025 TMAP MOBILITY Earthstar Geographics SIO
SYMBOL DESCRIPTION
SEASONAL WETLAND CREATION
RIPARIAN CREATION
RIPARIAN ENHANCEMENT
EPHEMERAL DRAINAGE
SOIL FILL LOCATIONS
WETLAND POND AREA
6" TALL BERM
STAGING AREAS
EXISTING DRAINAGES
3.4 AC
1.0 AC
0.38 AC
7.8 AC
1,800 LF
DRAFT
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Plot Date: 27 February 2026 - 11:20 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
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ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
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UCA S R. PIPER Lic ense No. 5 873
STA TE OF CA LIFORNIA
Signature
Renewal Date
Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
OVERVIEW PLAN
L-002 2
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
RIPARIAN AND WETLAND MITIGATION AREA 'B'
HABITAT DEVELOPMENT PLAN - SHEET L-101
WETLAND SECTION B1 - B1 - SHEET L-301
WETLAND SECTION B2 - B2, B3 - B3 - SHEET L-302
WETLAND MITIGATION AREA 'C'
HABITAT DEVELOPMENT PLAN - SHEET L-102
WETLAND SECTION C1 - C1 - SHEET L-302
MANNING ROAD
WETLAND MITIGATION AREA 'A'
HABITAT DEVELOPMENT PLAN - SHEET L-101
WETLAND SECTION A1-A1 - SHEET L-301
N
0 400 feet
1" = 200'
200 600 800
HIGHLAND ROAD
CONTRA COSTA COUNTY ALAMEDA COUNTY
SYMBOL DESCRIPTION
SEASONAL WETLAND CREATION
RIPARIAN CREATION
RIPARIAN ENHANCEMENT
EPHEMERAL DRAINAGE
SOIL FILL LOCATIONS
WETLAND POND AREA
6" TALL BERM
STAGING AREAS
EXISTING DRAINAGES
DRAFT
This document shall not be used for
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Client
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Plot Date: 27 February 2026 - 11:36 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
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Plotted By: Lucas Piper
Project No.
Sheet of
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ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ens e No. 5873
ST A T E OF CA LIFORNIA
Signature Renewal Date Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
CONCEPT HABITAT DEVELOPMENT PLAN
L-101 3
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
N HIGHLAND ROAD
MANNING ROAD
RIPARIAN MITIGATION AREA 'B'
0 100 feet
1" = 50'
50 150 200
RIPARIAN MITIGATION AREA 'A'
MANNING ROAD
CONTRA COSTA COUNTY
ALAMEDA COUNTY
CONTRA COSTA COUNTY
ALAMEDA COUNTY
6" TALL BERM, TYP.
A1
L-301
B1
L-301
B2
L-302
B3
L-302
ROCK ARMORED SPILLWAY
VEGETATED SOIL LIFT SPILLWAY
10.00 5.00
10.00 5.00
35.00 10.00
SYMBOL DESCRIPTION
SEASONAL WETLAND CREATION
RIPARIAN CREATION
RIPARIAN ENHANCEMENT
EPHEMERAL DRAINAGE
SOIL FILL LOCATIONS
WETLAND POND AREA
6" TALL BERM
STAGING AREAS
EXISTING DRAINAGES
DRAFT
This document shall not be used for
construction unless signed and sealed for
construction. Sheet No.
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Client
Drawn Designer
Scale
Plot Date: 27 February 2026 - 11:36 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
Date
Plotted By: Lucas Piper
Project No.
Sheet of
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herein, as an instrument of professional service, is the property of GHD and shall not be reused in whole or in part for any other project without GHD's written authorization. © 2026 GHD
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No. Issue Drawn Approved Date
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CONCEPT DESIGN
ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ens e No. 5873
ST A T E OF CA LIFORNIA
Signature Renewal Date Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
CONCEPT HABITAT DEVELOPMENT PLAN
L-102 4
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
MANNING ROAD
N
0 100 feet
1" = 50'
50 150 200
RIPARIAN MITIGATION AREA 'C'
C1
L-302
VEGETATED SOIL LIFT SPILLWAY
VEGETATED SOIL LIFT SPILLWAY
VEGETATED SOIL LIFT SPILLWAY
10.00 25.00
25.00 10.00
10.00 30.00
10.00 30.00
30.00 10.00
VEGETATED SOIL LIFT SPILLWAY
WETLAND GRADING
- CUT SLOPE -
EXISTING GRADE
SPILLWAY SHELF
SEASONAL WETLAND ESTABLISHMENT
- 0 INCHES TO 0.5 FOOT DEEP -
SEASONAL WETLAND ESTABLISHMENT
- 0 INCHES TO 0.5 FOOT DEEP -
ALL SEASONAL WETLAND ESTABLISHMENT SHALL BE OVER
EXCAVATED BY 3" TO ALLOW FOR PLACEMENT OF TOPSOIL SOIL
TO MEET FINISHED GRADES. SUBSOIL SHALL BE COMPACTED
ACCORDING TO SPECIFICATION PRIOR TO TOPSOIL BACKFILL.
ALL AREAS OUTSIDE OF SEASONAL WETLAND ESTABLISHMENT BASINS SHALL BE ROUGH GRADED TO 3" BELOW FINISHED GRADE TO ALLOW FOR PLACEMENT OF TOPSOIL. PONDING WATER SURFACE ELEVATION -
ELEVATION TO MATCH CONTROLLED OUTFLOW
SPILLWAY TO CREATED WETLAND SWALE OR
OUTFALL TO EXISTING DRAINAGE.
EXISTING GRADE
UPLAND SEPARATING PROPOSED WETLAND BASINS AND
EXISTING SEASONAL WETLAND SWALE SHALL MATCH
EXISTING GRADE. CREATED WETLANDS SHALL RANGE IN
DEPTH BETWEEN 0.0' TO 0.5' BELOW SPILLWAY ELEVATION.
LIMIT OF GRADING
UNDISTURBED SUBGRADE
THE CONTRACTOR SHALL OVER-EXCAVATE THE
WETLAND BASIN TO A DEPTH OF 3" BELOW FINISH
GRADE. ALL EXCAVATED SUBSOIL SHALL BE
PLACED AS FILL BASE MATERIAL AT A LOCATION
AGREED UPON BETWEEN THE CONTRACTOR AND
OWNER. ALL GRADED SURFACES SHALL BE CUT OR
FILLED TO 3" BELOW FINISHED GRADE TO ALLOW
FOR REAPPLICATION OF STOCKPILED TOPSOIL.
AFTER WETLAND OVER-EXCAVATION (ROUGH
GRADE) THE CONTRACTOR SHALL HARROW AND
SCARIFY EXISTING SUBSOIL. AFTER THE
SUBSOIL IS SCARIFIED, THE CONTRACTOR SHALL
GRADE THE SUBSOIL TO A SMOOTH SURFACE 3"
BELOW FINISHED GRADE, WATER-CONDITION,
AND COMPACTED TO 95% RELATIVE DENSITY.
FOLLOWING SUBSOIL COMPACTION, A 3" LAYER
OF STOCKPILED TOPSOIL SHALL BE EVENLY
PLACED TO MEET FINISHED GRADE AS PER PLAN.
PLACED TOPSOIL SHALL BE COMPACTED TO 85%
RELATIVE DENSITY.
PROPOSED FINISHED GRADES: ALL PROPOSED GRADES ARE TO MEET AND BLEND IN WITH EXISTING GRADES AT PROJECT LIMITS OF GRADING AND EXISTING CONTOURS.
ELEVATIONELEVATION
718
720
730
740
718
720
730
740
-0+12 0+00 1+00 2+00 3+00 4+00 4+12
-0+12 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+12
ELEVATIONELEVATION
688
690
700
710
688
690
700
710
-0+12 0+00 1+00 2+00 3+00 3+62
-0+12 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 3+62
DRAFT
This document shall not be used for
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construction. Sheet No.
Original Size
Title
Project
Client
Drawn Designer
Scale
Plot Date: 27 February 2026 - 11:20 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
Date
Plotted By: Lucas Piper
Project No.
Sheet of
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herein, as an instrument of professional service, is the property of GHD and shall not be reused in whole or in part for any other project without GHD's written authorization. © 2026 GHD
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CONCEPT DESIGN
ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ense No. 5 873
STA TE OF CA LIFORNIA
Signature
Renewal Date
Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
TYPICAL SECTIONS
L-301 5
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
TYPICAL WETLAND SPILLWAY SECTION
EXISTING GRADE SPILLWAY SHELF AND SEASONAL WETLAND CREATION
TYPICAL WETLAND GRADING SECTION
WETLAND OVER EXCAVATION AND COMPACTION REQUIREMENTS
SECTION A1
SECTION B1
6" WETLAND PONDING DEPTH
MAX 3' CUT EXISTING GRADE
WETLAND POND
3'-4' PONDING DEPTH
SPILL AT EXISTING GRADE
6" WETLAND PONDING DEPTH
BOUNDARY /
EASEMENT
BOUNDARY /
EASEMENT
MAX 3' CUT
6" WETLAND PONDING DEPTH
BOUNDARY /
EASEMENT
SPILL AT EXISTING GRADE
EXISTING GRADE SPILL AT EXISTING GRADE WETLAND POND
3'-4' PONDING DEPTH
ELEVATION
ELEVATION
STATION
668
670
680
690
700
668
670
680
690
700
-0+12 0+00 1+00 2+00 3+00 4+00 5+00 5+12
-0+12 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+12
ELEVATIONELEVATION
668
670
680
690
700
710
668
670
680
690
700
710
-0+12 0+00 1+00 2+00 3+00 3+12
-0+12 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+12
ELEVATIONELEVATION
STATION
PROFILE VIEW OF CL-8
638
640
650
660
670
638
640
650
660
670
-0+12 0+00 1+00 2+00 2+62
-0+12 0+00 0+50 1+00 1+50 2+00 2+50 2+62
DRAFT
This document shall not be used for
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Scale
Plot Date: 27 February 2026 - 11:20 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
Date
Plotted By: Lucas Piper
Project No.
Sheet of
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No. Issue Drawn Approved Date
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CONCEPT DESIGN
ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ense No. 5 873
STA TE OF CA LIFORNIA
Signature
Renewal Date
Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
TYPICAL SECTIONS
L-302 6
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
SECTION B2
SECTION B3
SECTION C1
MAX 3' CUT
6" WETLAND PONDING DEPTH
EXISTING GRADE
6" TALL BERM
6" TALL BERM
6" WETLAND PONDING DEPTH 6" TALL BERM 6" WETLAND PONDING DEPTH
BOUNDARY /
EASEMENT
BOUNDARY /
EASEMENT
BOUNDARY /
EASEMENT
WETLAND POND
5'-6' PONDING DEPTH
6" WETLAND PONDING DEPTH
6" WETLAND PONDING DEPTH
MAX 3' CUT
MAX 3' CUT
FLOOD ELEVATION
ORDINARY HIGH WATER
DRAFT
This document shall not be used for
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Drawn Designer
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Plot Date: 27 February 2026 - 11:20 AM Filename: \\ghdnet\ghd\US\Roseville\Projects\561\12679153\Digital_Design\ACAD\Sheets\12679153_CONCEPT PLAN.dwg ANSI D
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Plotted By: Lucas Piper
Project No.
Sheet of
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No. Issue Drawn Approved Date
Project
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CONCEPT DESIGN
ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ense No. 5 873
STA TE OF CA LIFORNIA
Signature
Renewal Date
Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT:
CONSTRUCTION NOTES & DETAILS
L-501 7
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
SITE PREPARATION NOTES
1. INITIAL SITE PREPARATION: PRIOR TO GRADING, THE CONTRACTOR SHALL STAKE THE PROJECT LIMIT OF WORK. FOLLOWING LIMIT OF WORK STAKING, THE CONTRACTOR SHALL MOW THE ENTIRE AREA WITHIN THE STAKED LIMITS. ALL NON-VEGETATED MATERIAL SHALL BE DISPOSED OFF SITE IN A LEGAL MANNER AT THE CONTRACTOR'S EXPENSE.
2. SITE STAKING: FOLLOWING SITE MOWING AND NON-VEGETATION CLEARING, THE CONTRACTOR SHALL IDENTIFY AND STAKE LIMIT OF GRADING, THE STAGING AND ACCESS ROUTES, AND THE TOPSOIL STOCKPILE AREA (LOCATION SHALL BE MUTUALLY AGREED ON BY CONTRACTOR AND CLIENT REPRESENTATIVE). STAKING SHALL BE PLACED NO MORE THAN FIVE FEET OUTSIDE THE LIMIT BOUNDARIES AS SHOWN ON THE DRAWINGS. STAKING SHALL BE APPROVED BY THE PROJECT BIOLOGIST AND CLIENT REPRESENTATIVE PRIOR TO GRADING OPERATIONS.
3. PROTECTIVE FENCING: THE CONTRACTOR SHALL INSTALL AND MAINTAIN THE FOLLOWING PROTECTIVE FENCING FOR THE FOLLOWING SITUATIONS. THE FENCING SHALL BE THE TYPE DESCRIBED BELOW AND SHALL BE MAINTAINED FOR THE TIME PERIODS INDICATED. THE CONTRACTOR SHALL INSTALL THE FENCING PRIOR TO ANY CLEARING AND GRUBBING OR SITE GRADING.
3.1. EXISTING WETLANDS AND WATERS OF THE US: THE CONTRACTOR SHALL INSTALL BIODEGRADABLE STRAW WATTLES A MINIMUM TWO FEET INLAND FROM EXISTING TOP OF BANK FOR ALL WATERS OF THE US ADJACENT TO THE PROJECT LIMIT OF GRADING. IF REQUIRED, A SILT FENCE SHALL BE KEYED ALONG THE ENTIRE LENGTH BASED ON MANUFACTURER RECOMMENDATIONS. THE CONTRACTOR SHALL MAINTAIN THE SEDIMENT CONTROL DEVICES FOR THE DURATION OF THE CONSTRUCTION PERIOD.
3.2. ADJACENT OPEN SPACE: THE CONTRACTOR SHALL INSTALL LATH WITH ORANGE FLAGGING ALONG THE STAKED LIMIT OF WORK.
4. FUELING AND EQUIPMENT MAINTENANCE: THE CONTRACTOR SHALL IMPLEMENT GENERAL SITE AND MATERIAL MANAGEMENT BMPS FOR MATERIAL AND EQUIPMENT THAT ARE IMPORTED TO THE SITE, SUCH AS PREVENTION OF LUBRICATION LEAKS FROM EQUIPMENT, FUEL, HYDRAULIC FLUID, AND TRANSMISSION FLUID. ALL EQUIPMENT FUELING SHALL BE DONE WITHIN THE STAGING AREA. THE CONTRACTOR SHALL HAVE A SPILL CONTROL PLAN APPROVED BY THE PROJECT BIOLOGIST.
5. EQUIPMENT AND MATERIAL DOCUMENTATION: THE CONTRACTOR SHALL DOCUMENT ALL MATERIALS BEING IMPORTED TO THE SITE TO DETERMINE APPLICABLE GENERAL SITE AND MATERIAL MANAGEMENT BMPs. THE CONTRACTOR SHALL PROPERLY STORE IMPORTED MATERIAL (BOTH HAZARDOUS AND NON-HAZARDOUS) IN A PROTECTED STORAGE AREA WITH SECONDARY CONTAINMENTS AND SHALL MAINTAIN AND INSPECT PORTABLE TOILETS AND ENSURING ALL WASTE CONTAINERS OR DUMPSTERS HAVE COVERS.
6. WATER TRUCK FILL STATION AND REQUIREMENTS: THE CONTRACTOR SHALL NEGOTIATE A WATER TRUCK FILL LOCATION WITH THE PROJECT BIOLOGIST. THIS LOCATION MAY BE AN OFFSITE WATER HYDRANT. IF OFFSITE FILLING IS REQUIRED THE CONTRACTOR SHALL OBTAIN A WATER METER FROM THE APPROPRIATE ENTITY. A WATER TRUCK SHALL BE USED ON-SITE DURING CONSTRUCTION IN ORDER TO TOP DAMPEN THE SOIL TO PREVENT WIND EROSION, CONTROL DUST, AND TO OPTIMIZE SOIL MOISTURE FOR COMPACTION PURPOSES.
7. STAGING AND VEGETATION DISPOSAL AREA: PRIOR TO TOPSOIL SALVAGE, THE CONTRACTOR SHALL DEMARCATE THE STAGING AREA. THE STAGING AREA SHALL BE RELATIVELY LEVEL AND CLEAR OF ALL WOODY AND NON-VEGEGETATED DEBRIS.
1. TOPSOIL SALVAGE PREPARATION: PRIOR TO WETLAND EXCAVATION THE CONTRACTOR SHALL DISC THE TOP 3" OF TOPSOIL (INCLUDING VEGETATION) ACROSS ALL AREAS WITHIN THE LIMIT OF GRADING.
2. TOPSOIL STOCKPILE: THE CONTRACTOR SHALL EXCAVATE THE TOP 3" OF TOPSOIL FROM ALL AREAS WITHIN THE LIMIT OF GRADING AND STOCKPILE AT THE APPROVED TOPSOIL STOCKPILE LOCATIONS.
STOCKPILED TOPSOIL SHALL BE A MINIMUM OF 50' FROM EXISTING JURISDICTIONAL WATERS AND SHALL HAVE APPROPRIATE PERIMETER SEDIMENT CONTROL AND EROSION CONTROL AS REQUIRED BY THE PROJECT RELATED PERMITS.
3. ROUGH WETLAND EXCAVATION AND UPLAND SUBSOIL PLACEMENT: THE CONTRACTOR SHALL OVER-EXCAVATE THE WETLAND BASIN TO A DEPTH OF 3". ALL GRADED SURFACES SHALL BE CUT OR FILLED TO 3" BELOW FINISHED GRADE TO ALLOW FOR RE-APPLICATION OF STOCKPILED TOPSOIL.
4. SUBSOIL TREATMENT: AFTER WETLAND OVER-EXCAVATION (ROUGH GRADE) THE CONTRACTOR SHALL SCARIFY EXISTING SUBSOIL TO A DEPTH OF 3". AFTER THE SUBSOIL IS SCARIFIED, THE CONTRACTOR SHALL GRADE THE SUBSOIL TO A SMOOTH SURFACE 3" BELOW FINISHED GRADE, WATER-CONDITION, AND COMPACTED TO 95% RELATIVE DENSITY. FOLLOWING SUBSOIL COMPACTION, A 3" LAYER OF STOCKPILED TOPSOIL SHALL BE EVENLY PLACED TO MEET FINISHED GRADE AS PER PLAN. PLACED TOPSOIL SHALL BE COMPACTED TO 85% RELATIVE DENSITY.
5. PROPOSED FINISHED GRADES : ALL PROPOSED GRADES ARE TO MEET AND BLEND IN WITH EXISTING GRADES AT PROJECT LIMIT OF GRADING AND EXISTING CONTOURS. PRECISE ELEVATIONS INDICATED ON THE PLANS SHALL BE VERIFIED IN FIELD AND RECORDED TO ON AS-BUILT PLANS.
6. TOPSOIL STOCKPILE AREA: AFTER RE-APPLICAITON OF STOCKPILED TOPSOIL AND FINISHED GRADES HAVE BEEN MET, THE CONTRACTOR SHALL RIP AND FLOAT OUT ANY REMAINING TOPSOIL WITHIN THE STOCKPILE AREA TO MEET, AS BEST AS POSSIBLE, THE PRE-CONSTRUCTION ELEVATIONS AND WATERSHEDS. AFTER TOPSOIL HAS BEEN SPREAD THE CONTRACTOR SHALL LIGHTLY RIP AND SCARIFY THE AREA TO CREATE A FRIABLE LOOSE TOPSOIL PLANTING MEDIUM PRIOR TO SEEDING. THE CONTRACTOR SHALL SEED AND HYDRO-MULCH THE AREA PER THE SEEDING PALETTE AND NOTES SHOWN ON THESE DRAWINGS.
7. CONTRACT AGREEMENT: NO CHANGE IN CONTRACT PRICE SHALL BE ALLOWED FOR ACTUAL OR CLAIMED DISCREPANCY BETWEEN EXISTING GRADE AND THOSE SHOWN ON THE PLANS AND SPECIFICATIONS AFTER CONTRACTOR HAS ACCEPTED EXISTING GRADES AND MOVED ONTO THE SITE.
8. FINISH GRADES: FINISH GRADES AND FINAL PRE-SEEDING GRADING SHALL BE REVIEWED AND APPROVED BY THE PROJECT BIOLOGIST AND THE CONTRACTOR'S ECOLOGIST IN THE FIELD PRIOR TO SEEDING.
9. SEEDBED PREPARATION: PRIOR TO SEEDING AND INSTALLATION OF EROSION CONTROL BLANKETS, THE CONTRACTOR SHALL ENSURE THE TOP 1" - 2" OF TOPSOIL IS LOOSE AND FRIABLE WITH NO CLODS LARGER THAN 3" IN DIAMETER. THE CONTRACTOR SHALL HARROW SEEDBED SURFACE IN ACCORDANCE WITH THE SEEDING NOTES.
10. COMPACTION TESTING: COMPACTION MAY BE SPOT CHECK BY A THIRD PARTY. CLIENT TO PROVIDE SPOT CHECKING. CONTRACTOR SHALL ALLOW FOR A MIN. 48 HOURS PRIOR TO TOPSOIL BACKFILL OR SEEDING TO ALLOW FOR CLIENT TO SPOT CHECK COMPACTION.
TOPSOIL SALVAGE, GRADING, AND SEED BED PREPARATION
1. VEGETATED SOIL LIFT SPILLWAY: LOCATION AND EXTENT OF EPHEMERAL DRAINAGE SPILLWAYS INTO EXISTING DRAINAGES ARE TO BE DETERMINED. SEE DETAIL ON THIS SHEET FOR TYPICAL CONSTRUCTION REQUIREMENTS. THE PROJECT BIOLOGIST SHALL STAKE LOCATIONS AND EXTENTS OF VEGETATED SOIL LIFTS, CLEAN COBBLE ROCK SPILL WAY, AND CLEAN COBBLE ROCK ENERGY DISSIPATER IN THE FIELD AND SHALL REVIEW WITH THE CONTRACTOR'S ECOLOGIST.
2. WETLAND TO WETLAND SPILLWAYS: ALL WETLAND TO WETLAND SPILLWAYS SHALL BE STABILIZED USING BIODEGRADABLE EROSION CONTROL BLANKETS. THE PROJECT BIOLOGIST SHALL STAKE EROSION CONTROL BLANKET BOUNDARY IN THE FIELD AND SHALL REVIEW WITH THE CONTRACTOR'S ECOLOGIST.
WATER CONTROL FEATURES
4" - 8" CLEAN
COBBLE ROCK
ENERGY DISSIPATER
WILLOW CUTTING OR ROOTED
BACHARRIS SP. BRUSH LAYER,
PLACED MIN. 3' O.C. BETWEEN
LIFTS. CUTTINGS SHALL BE 5' - 7'
LONG SET MIN. 12" INTO
UNDISTURBED NATIVE SOIL.
DRIVE WILLOW
STAKE 5' - 10' O.C.
VERTICALLY ALONG
BOTTOM LIFT SET
MIN. 24" INTO
UNDISTURBED
NATIVE SOIL.
NATIVE SOIL WRAPPED IN DOUBLE LAYER OF
LONG-LASTING (3 YEAR) BIODEGRADABLE
GEOTEXTILE FABRIC OR GRID OF GEOTEXTILE
BURLAP SACKS FILLED WITH NATIVE SOIL AND
STAPLED SHUT. SEED WITH RIPARIAN SEED
MIX PRIOR TO WRAPPING / STAPLING. KEY-IN
TOP LAYER OF FABRIC INTO EXISTING SOIL
MIN. 8". NUMBER OF LIFTS DEPENDENT ON
SPILLWAY LOCATION (ELEVATION CHANGE
AND DISTANCE).
2" LAYER OF NATIVE SOIL PLACED BETWEEN LIFTS WITH BRUSH MAT ANCHOR IN FABRIC WITH MIN. 4" WOOD STAKE
AT FRONT AND BACK OF LIFTS SPACED 1' O.C.
KEY LIFTS MIN. 1
FOOT INTO
EXISTING
CHANNEL BANK.
PLACE CLEAN
COBBLE MIN. 2' - 3' UP
SIDE OF CHANNEL BANK.
8 OZ. NON-WOVEN GEOTEXTILE FABRIC KEYED IN ON ALL SIDES BELOW ALL ROCK. 2" LAYER SOIL BETWEEN
FABRIC AND ROCK. SEED WITH
WETLAND SEED MIX PRIOR TO
FABRIC PLACEMENT.
EXISTING GRADE
SPILLWAY, GRADED TO
ELEVATIONS SHOWN ON PLANS
BIODEGRADABLE
EROSION CONTROL
BLANKET (20 OZ/SY
WOVEN COIL MAT -
BLRD-MAT OR EQUAL)
KEYED IN ON ALL
SIDES. INSTALL PER
MANUFACTURER'S
RECOMMENDATION
VEGETATED SOIL LIFTS
EXTEND FOR FULL WIDTH
OF SPILLWAY.
CONTRACTOR TO VERIFY
WITH OWNER THE LIMITS
OF THE WIDTH AND
LENGTH OF EACH
STRUCTURE AT EACH
OUTFALL LOCATION AS
IDENTIFIED ON THE PLAN.
VEGETATED SOIL LIFT SPILLWAY
12" LAYER OF LOOSELY PLACED 4" - 8" CLEAN
COBBLE ROCK. FILL ALL VOID WITH NATIVE SOIL.
1 CREATED EPHEMERAL DRAINAGE
8 OZ. NON-WOVEN GEOTEXTILE FABRIC
KEYED IN ON ALL SIDES BELOW ALL ROCK.
EXISTING GRADE
ROCK ARMORED SPILLWAY
12" LAYER OF LOOSELY PLACED 4" - 8" CLEAN
COBBLE ROCK. FILL ALL VOID WITH NATIVE SOIL.
12" LAYER OF LOOSELY PLACED 4" - 8" CLEAN
COBBLE ROCK. FILL ALL VOID WITH NATIVE SOIL.
2 8 OZ. NON-WOVEN GEOTEXTILE FABRIC
KEYED IN ON ALL SIDES BELOW ALL ROCK.
EPHEMERAL DRAINAGE CREATION
12" LAYER OF LOOSELY PLACED 4" - 8" CLEAN COBBLE
ROCK. FILL ALL VOID WITH NATIVE SOIL. PLACED
WHERE RUNNING SLOPE IS 30:1 OR STEEPER
5:1 SLOPE
3 DRAFT
This document shall not be used for
construction unless signed and sealed for
construction. Sheet No.
Original Size
Title
Project
Client
Drawn Designer
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Plotted By: Lucas Piper
Project No.
Sheet of
Reuse of Documents
This document and the ideas and designs incorporated
herein, as an instrument of professional service, is the property of GHD and shall not be reused in whole or in part for any other project without GHD's written authorization. © 2026 GHD
Drafting
Check
0 1"
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original size sheet
Design
Check
No. Issue Drawn Approved Date
Project
Manager
CONCEPT DESIGN
ROCKY RIDGE, LLC.
MANNING RANCH HABITAT DEVELOPMENT PROJECT
12679153
8 GHD Inc. L. PIPER SEPTEMBER 2025 No.
NOTE:
PLANSET CONTENT
COLOR-DEPENDENT;
PLANSET TO BE PLOTTED
IN FULL COLOR
L ICENSED LANDSCAPE ARCHI TEC
L
T
UCA S R. PIPER Lic ense No. 5 873
STA TE OF CA LIFORNIA
Signature
Renewal Date
Date
10/31/2026
xx/xx/xxxx 201 Creekside Ridge Court, Ste 100
Roseville, CA 95678
T: 1 916 918 0626
Rocky Ridge, LLC.
193 Blue Ravine Road, Ste 165
Folsom, CA 95630
T: 1 916 985 1188
CLIENT: PLANTING NOTES, DETAILS, & SCHEDULES
L-502 8
L. GOLLER E. PONTE
E. PONTE L. PIPER
AS NOTED
1. FIELD VERIFY: CONTRACTOR SHALL FIELD VERIFY LOCATIONS OF ALL EXISTING
CONDITIONS, IF ANY PART OF THIS PLAN CANNOT BE FOLLOWED DUE TO SITE
CONDITIONS, CONTACT THE CLIENT'S REPRESENTATIVE FOR DIRECTION AS TO HOW TO PROCEED.
2. SOIL BACKFILL: CONTRACTOR SHALL BACKFILL THE PLANTING PITS WITH IMPORTED TOPSOIL THAT MEETS THE FOLLOWING REQUIREMENTS:
· AMENDED USDA CATEGORIZED LOAM, SANDY CLAY LOAM, OR SANDY LOAM CONTAINING BETWEEN 15% AND 25% CLAY WITH A COMBINED CLAY/SILT CONTENT OF MAX. 55%
· SOIL PH BETWEEN 6.0 AND 7.0
· LESS THAN 3 MMHO/CM SOLUBLE SALT
· SOIL SHALL BE AMENDED WITH ORGANIC, WEED-FREE COMPOST TO ENSURE 5% MINIMUM ORGANIC MATTER BY DRY WEIGHT (SOIL WILL BE MADE UP OF 20% - 30% COMPOST, TYP.
· SOIL SHALL CONTAIN SUFFICIENT PORE SPACE TO PERMIT ADEQUATE
SPACE FOR ROOT PENETRATION AND ALLOW FOR ADEQUATE
PERCOLATION
3. PLANTING PITS: PLANTING PITS SHALL BE THE DEPTH AND DIAMETER AS SHOWN PER THE DETAILS THIS SHEET. IF PLANTING PITS ARE EXCAVATED
USING A POWER AUGER, BREAK VERTICAL SIDES WITH A METAL ROD OR SPADE TO INTERRUPT CONTINUOUS CURVE INFLUENCE IN ROOT DEVELOPMENT.
4. COMPLIANCE: CONTRACTOR SHALL COMPLY WITH FEDERAL, STATE, AND LOCAL
LAWS AND REGULATIONS PERTAINING TO THE INSPECTION FOR PLANT DISEASES AND INSECT INFESTATION.
5. IDENTIFICATION: CONTRACTOR SHALL VERIFY CORRECT SPECIES OF ALL PLANT MATERIAL. ALL CONTAINERIZED PLANTS SHALL HAVE WELL-DEVELOPED BRANCH AND/OR ROOT SYSTEMS.
6. INSPECTION: PLANTS ARE SUBJECT TO PROJECT BIOLOGIST AND CLIENT'S
INSPECTION AND APPROVAL FOR SIZE, VARIETY, CONDITION, ROOT
DEVELOPMENT DEFECTS, AND INJURY UPON DELIVERY TO THE PROJECT SITE OR AT ANY TIME BEFORE AND DURING PROGRESS OF WORK.
7. REJECTION: CONTRACTOR SHALL REMOVE REJECTED PLANTS FROM THE SITE IMMEDIATELY AND REPLACE WITH ACCEPTABLE MATERIALS AS SPECIFIED.
8. SUBSTITUTION: PLANT SIZE, SEED QUANTITIES, AND/OR SPECIES
SUBSTITUTIONS WILL NOT BE PERMITTED WITHOUT THE CLIENT'S AND THE DESIGNATED REPRESENTATIVE'S WRITTEN APPROVAL.
9. QUANTITIES: CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING ALL PLANT COUNTS BY SPECIES. CONTRACTOR SHALL ENSURE THAT CORRECT NUMBER OF TREES AND SHRUBS ARE INSTALLED.
10. CONTAINER SIZES: ALL PLANT CONTAINER SIZES SHALL BE VERIFIED AND
PLANTED IN THE APPROPRIATE PLANTING POLYGONS AS SHOWN ON THE DRAWINGS AND PLANT PALETTES.
11. TAG REMOVAL: CONTRACTOR SHALL REMOVE TAGS, LABELS, NURSERY STAKES
AND TIES FROM ALL PLANTS AFTER DELIVERY INSPECTION AND LOCATION APPROVAL BY THE PROJECT BIOLOGIST AND PRIOR TO INSTALLATION.
12. LOCATION: EXACT PLANT LOCATION AND FLAGGING/STAKING SHALL BE PERFORMED BY THE PROJECT BIOLOGIST. THE CONTRACTOR'S ECOLOGIST
SHALL WORK WITH THE PROJECT BIOLOGIST TO ENSURE THAT FLAGGING AND STAKING LOCATIONS OF INDIVIDUAL PLANT SPECIES ARE ADHERED TO. EXACT
LOCATIONS STAKED IN THE FIELD BY THE PROJECT BIOLOGIST SHALL NOT BE MOVED UNLESS APPROVED BY THE PROJECT BIOLOGIST.
13. SPACING: ALL CONTAINER PLANTS ARE TO BE ALIGNED AND SPACED IN ALL DIRECTIONS AS STAKED IN THE FIELD BY THE PROJECT BIOLOGIST.
14. STAKING: THE CONTRACTOR SHALL MARK THE PLANTING BOUNDARIES PRIOR TO INDIVIDUAL PLANT STAKING. FOLLOWING BOUNDARY MARKING, THE PROJECT BIOLOGIST SHALL STAKE PLANT LOCATIONS BY SPECIES. PLANTING
LOCATIONS FOR CONTAINER PLANTS SHALL BE MARKED WITH COLOR-CODED AND LABELED PIN FLAGS BY THE PROJECT BIOLOGIST. THE PROJECT BIOLOGIST
SHALL ENSURE THAT PLANT QUANTITIES FOR SHRUBS AND TREES MATCH THE
QUANTITIES LISTED ON THE PLANTING AND IRRIGATION PLANS AND AS INDICATED IN ON THE PLANT PALETTE. PLANTING MAY BEGIN AFTER REVIEW
AND ACCEPTANCE OF THE THE FLAGGED LAYOUT AND IRRIGATION SYSTEM INSTALLATION.
15. INSTALLATION OF CONTAINER PLANTS: THE CONTRACTOR SHALL EXCAVATE
PLANT HOLES TO A MINIMUM OF THREE FEET DEEP AND THREE TIMES THE WIDTH OF THE CONTAINER SIZE. THE SIDES OF THE HOLES SHALL BE SCARIFIED TO ELIMINATE SMOOTH SURFACES PRIOR TO PLANT INSTALLATION. THE PLANT
HOLES SHALL BE BACKFILLED WITH IMPORTED SOIL THAT MEETS THE REQUIREMENTS AS STATED ON THESE PLANS. ONCE INSTALLED, IRRIGATE TO SETTLE LOOSE SOIL. BEFORE THE PLANTS ARE SET IN, A SHALLOW WATER RETENTION BASIN 36" IN DIAMETER SHALL BE CONSTRUCTED AROUND EACH
WOODY PLANTING SUCH THAT IRRIGATION WATER MAY FILL AROUND THE PLANT BUT NOT SUBMERGE THE CROWN OF THE ROOT AREA. FILL BASIN WITH WOOD MULCH TO A DEPTH OF 3" FOLLOWING BERM CREATION. AFTER INSTALLATION
ALL CONTAINER PLANTS SHALL BE IMMEDIATELY WATERED-IN TO AVOID TRANSPLANT SHOCK AND SETTLING.
16. INSTALLATION INSPECTION: CONTRACTOR SHALL PROVIDE A MINIMUM OF 24
HOURS AFTER PLANTING PIT CREATION, BACKFILL, AND WATERING IN, TO
ALLOW FOR PROJECT BIOLOGIST TO INSPECT PLANTING PITS PRIOR TO PLANT INSTALLATION. CONTRACTOR SHALL NOTIFY PROJECT BIOLOGIST 48 HOURS PRIOR TO INSPECTION.
17. CROWN: WOODY CONTAINER PLANTS SHALL BE PLACED SO THAT THE CROWN IS SET 1
2 " TO 1" ABOVE EXISTING GRADE TO ENSURE POSITIVE DRAINAGE FROM THE CROWN TO THE WATERING BASIN AND ALLOW FOR SETTLING. A SLOW-RELEASE 20-10-5 AGRIFORM FERTILIZER TABLET SHALL BE SET ADJACENT TO THE ROOT BALL APPROXIMATELY HALFWAY UP FROM THE BOTTOM OF THE ROOT BALL.
THREE TABLESPOONS OF MYCORRHIZAE IN GRANULAR FORM SHALL BE
SPRINKLED INTO THE PLANTING PIT AFTER ENOUGH BACKFILL HAS BEEN ADDED TO MAKE THE PIT READY TO ACCEPT THE PLANT. THE WATERING BERM IS A RIM
OF SOIL DESIGNED TO HOLD WATER NEAR THE PLANT WITHIN THE WATERING BASIN. PLANTS THAT SETTLE BELOW THE BASIN BOTTOMS SHALL BE RAISED
BACK TO REQUIRED LEVEL, WITH ADDITIONAL SOIL ADDED IF NECESSARY AT NO ADDITIONAL COST TO THE CLIENT.
PLANTING NOTES
PLANT PALETTES
TREE AND SHRUB CONTAINER PLANTINGS
BOTANICAL NAME / COMMON NAME
AREA 1.38 AC
SIZE
QUERCUS AGRIFOLIA / COAST LIVE OAK 15 GALLON
BACCHARIS PILULARIS / COYOTE BRUSH
ROSA CALIFORNICA / CALIFORNIA ROSE
JUGLANS CALIFORNICA / CALIFORNIA BLACK WALNUT
1 GALLON
1 GALLON
SALIX LASIOLEPIS / S. LAEVIGATA / ARROYO OR RED WILLOW
QUERCUS LOBATA / VALLEY OAK
5 GALLON
15 GALLON
5 GALLON
5 GALLON
CUTTING
QTY. REQ.
13 13
25 25
9 43
31 31
RUBUS URSINUS / CALIFORNIA BLACKBERRY
SAMBUCUS NIGRA CAERULEA / BLUE ELDERBERRY
1 GALLON
1 GALLON
43 10
5 GALLON 19
AESCULUS CALIFORNICA 5 GALLON 25 / CALIFORNIA BUCKEYE
ACER NEGUNDO 5 GALLON 13 / BOX ELDER
QUERCUS AGRIFOLIA / COAST LIVE OAK
QUERCUS LOBATA / VALLEY OAK
SALIX LASIOLEPIS / S. LAEVIGATA / ARROYO OR RED WILLOW
SEED BED PREPARATION AND SEEDING
FOLLOWING FINISH GRADING AND TOPSOIL PLACEMENT, THE CONTRACTOR SHALL BROADCAST SEED AND HYDRO-MULCH ACCORDING TO THE FOLLOWING 2-STEP METHOD PRIOR TO PLACEMENT OF FABRIC:
1. BROADCAST APPROPRIATE SEED MIX AT RATES SHOWN WITH MYCORRHIZAL INOCULUM MIXED IN BROADCASTER AT A RATE OF 15 LBS PER ACRE. FOLLOWING SEEDING
HARROW ENTIRE SEEDED AREA TO ENSURE PROPER SEED TO SOIL CONTRACT WITHIN THE TOP 1 - 2 INCHES OF SOIL.
2. FOLLOWING SEEDING, THE CONTRACTOR SHALL HYDRO-MULCH THE ENTIRE SEEDED AREA. HYDRO SLURRY SHALL CONTAIN THE FOLLOWING COMPONENTS AND MINIMUM RATES:
2.1. COMMERCIALLY AVAILABLE WEED FREE HYDRO-WOOD FIBER MULCH (MUST BE APPROVED BY PROJECT BIOLOGIST) AT A RATE OF 2,000 LBS / ACRE.
2.2. GREEN DYED CELLULOSE FIBER MULCH AT A RATE OF 500 LBS/ACRE (UNLESS
INCLUDED IN WOOD FIBER MULCH)
2.3. ORGANIC TACKIFIER AT 125 LBS/ACRE
2.4. CLEAN WATER (TO CREATE AN ADEQUATE SLURRY FOR HYDRAULIC APPLICATION) 1" 1'-0"Ԁ
TREE PLANTING (STAKE AND BROWSE PROTECTION FENCE)
PLANT PIT DETAIL STAKING DETAIL
1 P-MA-03
Attachment 4
Hydrology Report
GEOTECHNICAL
ENVIRONMENTAL
WATER RESOURCES
CONSTRUCTION SERVICES
COASTAL/MARINE GEOTECHNICS
2633 Camino Ramon, Suite 250 San Ramon, CA 94583 (925) 866-9000 [email protected] www.engeo.com
Project No.
11134.000.005
October 3, 2025
Revised April 3, 2026
Mr. Jeff Olberding
Olberding Environmental, Inc.
3170 Crow Canyon Place, Suite 260
San Ramon, CA 94583
Subject: Quarry Lakes Parkway Mitigation Area
Livermore, California
WATER AVAILABILITY ANALYSIS
Dear Mr. Olberding:
We have completed our water availability analysis for the proposed Quarry Lakes Parkway Mitigation Area located in Livermore, California. The mitigation area is primarily located within the greater Eagle Ridge Preserve, which is being developed as a mitigation bank. The Quarry Lakes Parkway Mitigation Area is situated in both Alameda County and Contra Costa County on either side of the Contra Costa/Alameda County line, surrounding the intersection of Manning Road and Highland Road, north of the City of Livermore, as shown in Figure 1 (attached). The proposed mitigation area plans to develop four wetland complexes to create a total of 3.41 acres of wetlands.
Historically, the property has been used for dry farming and grazing. The purpose of this analysis was to develop an understanding of the typical flow volumes that could be expected in several proposed seasonal wetland areas. The flow-volume results of the analysis were then used to develop an estimate of available water to sustain the typical wetland vegetation types, which are proposed for the wetland areas.
1.0 HYDROLOGIC SETTING
There are three wetland complexes proposed for the mitigation area, as shown in the Vicinity Map in Figure 1. Wetland Complex A drains southwesterly towards Collier Creek, while the other wetland complexes (B and C) drain into Manning Creek to the east. Watershed maps are included in Figures 2 through 6 (attached). The isohyetal map of Contra Costa County mean annual precipitation indicates that approximately 17 inches of annual precipitation occurs per year in the area of the proposed mitigation bank (Contra Costa Public Works, 1977). The isohyetal map prepared by the Alameda County Flood Control and Water Conservation District (2016) indicates approximately 16 inches of annual precipitation in the area, which is assumed to more accurately reflect the changed rainfall conditions due to climate change at the site. The area generally exhibits a mild, Mediterranean-type climate with warm, dry summers and cool, wet winters.
Olberding Environmental, Inc. 11134.000.005
Quarry Lakes Parkway Mitigation Area October 3, 2025
WATER AVAILABILITY ANALYSIS Revised April 3, 2026
2.0 GEOLOGY
The Cayetano Creek watershed is located in the Mount Diablo fold-and-thrust belt on the southern flank of the Mount Diablo uplift. The bedrock formations in the area south of Mount Diablo and north of the Livermore Valley have been folded and cut by thrust faults that typically dip toward the north, according to recent geologic mapping by Crane (1995) and Graymer, et al. (1996). The site is underlain by Pliocene non-marine sedimentary rock consisting of weakly indurated claystone, siltstone, and thin beds of sandstone and pebble conglomerate.
Soil mapping of the watershed prepared by the National Resource Conservation Service (NRCS) indicates that surficial soil materials primarily consist of montmorillonitic clay soil with a hydrologic group rating of ‘D.’ Group ‘D’ soil is defined as having a very slow infiltration rate when thoroughly saturated. As a result, the watershed is characterized by rapid run-off characteristics after saturation has occurred.
3.0 CLIMATE
This study uses average monthly data to determine the water balance of the studied system.
ENGEO is unaware of any current or historical precipitation study performed at or near the site that could be used to estimate the mean monthly precipitation amounts for the site. Therefore, data from a weather station located at the Livermore Municipal Airport, which is approximately 6 miles south of the site, was utilized to estimate the values shown in Table 3-1. Historical daily precipitation data for water years 1991 to present were obtained from the Livermore Municipal Airport weather station from the joint National Oceanic and Atmospheric Administration (NOAA) and National Climatic Data Center (NCDC) website (NOAA and NCDC, 2025); this website identifies this weather station as Weather Station Number 724927. The site has approximately the same precipitation and temperature characteristics as the Livermore Municipal Airport in terms of annual expected rainfall and temperature intensities. Table 3.0-1 summarizes the mean monthly precipitation amounts for the site.
TABLE 3.0-1: Monthly Mean Precipitation (inches)
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 Source: Livermore Municipal Airport Station (NOAA and NCDC, 2025)
4.0 WATER BUDGET – PROPOSED MITIGATION AREA
The water budget defines and quantifies the important input and output parameters, such as precipitation, evapotranspiration, and infiltration into or out of a given body of water. These parameters are analyzed individually to develop expected numerical value flux estimates, and the sum of the parts provides an estimate of available water at a given time step. For this project, the summation analysis approximates the volumes of available surface water expected to flow through, or be retained in, the proposed wetland each month.
Olberding Environmental, Inc. 11134.000.005
Quarry Lakes Parkway Mitigation Area October 3, 2025
WATER AVAILABILITY ANALYSIS Revised April 3, 2026
As illustrated in Diagram 1 below, the model that is analyzed in this report is expressed mathematically as:
Δ𝑆
Δ𝑡
= 𝑅𝑖𝑛 + 𝐷𝑃 − 𝐸𝑇 − 𝑅𝑜𝑢𝑡 − 𝐺𝑜𝑢𝑡
Where,
ΔS/Δt: Change in storage over time
Rin: Surface Inflow (including upstream run-on in acre-ft/month) DP: Direct Precipitation (in acre-ft/month)
ET: Evapotranspiration (in acre-ft/month)
Rout: Surface Outflow (in acre-ft/month)
Gout: Subsurface Infiltration (in ac-ft/month
An estimate of the amount of water available to the proposed plant palette is considered separately in this document.
4.1 INFLOW PARAMETERS
For the water budget, we quantified several sources of both inflow and outflow to each wetland complex. It is assumed that all portions of the tributary watershed will flow into each wetland complex through a series of diversion structures. Inflow components included direct precipitation falling on areas within the proposed wetlands. We calculated these inflows using published precipitation data, approximate project watershed areas, and hydrologic calculations to estimate runoff from developed sites, as described below.
• For purposes of this analysis, we estimate that 10 percent of the total volume of rainfall occurring within the upstream watershed will be transformed into rainfall runoff and enter the creek channel as surface flow in the study area for an average month. The 10 percent overall estimate of total rainfall volume entering the wetlands as rainfall runoff corresponds with United States Geological Survey estimates for the area, according to a study by Rantz (1971) and with rainfall-runoff transformation estimates used by the California Stormwater Quality Association. The 10 percent estimate considers seasonal variations in rainfall intensity and the nature of clay soil in the watershed, which often retains considerable water in the early rainfall season. The estimate is, thus, somewhat conservative in the spring after watershed saturation occurs and water requirements of plantings are higher. The upstream watershed area to the restoration project is estimated by ENGEO as 145.7 acres, as shown in Figure 1.
The 145.7 acres is generally open space grassland but also consists of 4.1 acres of impervious surfaces from Manning Road north of Wetlands A and C, and a structure and access road to the north of Wetland A. Runoff from the impervious regions will essentially flow directly into the proposed wetland. The remaining part of the watershed is open grassland and vegetation.
• 100 percent of direct precipitation based on average monthly rainfall is also included in the analysis over the total project area as a hydrologic input.
Tables 4.1-1 to 4.1-8 in Appendix A (attached) summarize the results of the monthly inflows for the various wetlands.
Olberding Environmental, Inc. 11134.000.005
Quarry Lakes Parkway Mitigation Area October 3, 2025
WATER AVAILABILITY ANALYSIS Revised April 3, 2026
4.2 OUTFLOW PARAMETERS
The outflow components of our water balance consisted of evapotranspiration and groundwater infiltration, and we calculated these using both published data and approximations. Several of these assumptions are listed as follows.
• Groundwater infiltration is difficult to estimate in ephemeral channels in semiarid and arid regions, such as the proposed project, because periods of stream flow are unpredictable, typically of short duration, and because seepage losses are unsteady in initially dry channels.
Based on research conducted by Niswonger et al. (2008), we estimate losses to infiltration as being 5 percent of the total volume of stream flow entering the channel per reach, as an average, for purposes of this study.
• Evapotranspiration is estimated based on referenced evapotranspiration measured since 2004 for Pleasanton, California, based on the plant palette associated with the project. The reduction of the evapotranspiration rates by a crop factor of 0.7 was used to account for the employment of native vegetation in the planting scheme. Therefore, the total evapotranspiration for the native plant palettes used in the study and inherent in the creek corridor is estimated as 70 percent of the evapotranspiration rate expected for reference agricultural crops in conformance with recommendations from the California Irrigation Management Information System. The evapotranspiration for the project site is shown in Table 4.2.1 below.
• The analysis assumes all wetland areas contain wetland vegetation that will evapotranspire any available water. Therefore, evaporation losses are considered negligible.
TABLE 4.2-1: Monthly Evapotranspiration in Project Area
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Monthly
Evapotranspiration
(in.)
1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 Adjusted
Evapotranspiration
(in.)
1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 Tables 4.2-2 to 4.2-9 in Appendix A show the monthly water outflows for the proposed wetlands.
4.3 PLANT AVAILABLE WATER
In months with calculated inflow, the wetland vegetation is assumed to evapotranspire available surface water up to the limit of maximum estimated evapotranspiration. In months with no inflow, wetland vegetation is assumed to rely on residual water found in the vadose zone or in perched groundwater sources. For wetland grasses; however, they will likely not be sustained. The Plant Available Water (PAW) is shown below, along with the study results summary in Tables 4.3-1 to 4.3-8 below.
Olberding Environmental, Inc. 11134.000.005
Quarry Lakes Parkway Mitigation Area October 3, 2025
WATER AVAILABILITY ANALYSIS Revised April 3, 2026
TABLE 4.3-1: Monthly Water Balance for Watershed A
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 1.26 1.30 1.02 0.55 0.23 0.04 0.00 0.01 0.05 0.44 0.75 1.59 Total Potential Loss
(ac-ft) 0.18 0.25 0.35 0.44 0.55 0.62 0.66 0.58 0.44 0.33 0.20 0.18 Outflow (ac-ft) 1.08 1.05 0.67 0.11 0.00 0.00 0.00 0.00 0.00 0.12 0.55 1.41 PAW (ac-ft) 0.13 0.20 0.31 0.42 0.23 0.04 0.00 0.01 0.05 0.31 0.17 0.12 TABLE 4.3-2: Monthly Water Balance for Watershed B1
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 1.52 1.56 1.23 0.66 0.28 0.05 0.00 0.01 0.06 0.54 0.90 1.91 Total Potential Loss
(ac-ft) 0.17 0.23 0.31 0.37 0.46 0.51 0.54 0.47 0.36 0.28 0.18 0.18 Outflow (ac-ft) 1.34 1.33 0.92 0.29 0.00 0.00 0.00 0.00 0.00 0.26 0.72 1.73 PAW (ac-ft) 0.11 0.16 0.26 0.34 0.28 0.05 0.00 0.01 0.06 0.25 0.14 0.10 TABLE 4.3-3: Monthly Water Balance for Watershed B2
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 0.17 0.17 0.14 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.10 0.21 Total Potential Loss
(ac-ft) 0.03 0.05 0.07 0.10 0.12 0.14 0.15 0.13 0.10 0.07 0.04 0.03 Outflow (ac-ft) 0.13 0.12 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.18 PAW (ac-ft) 0.03 0.04 0.07 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.04 0.03 TABLE 4.3-4: Monthly Water Balance for Watershed C1
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 0.06 0.06 0.05 0.03 0.01 0.00 0.00 0.00 0.00 0.02 0.03 0.07 Total Potential Loss
(ac-ft) 0.01 0.02 0.02 0.03 0.04 0.05 0.05 0.04 0.03 0.02 0.01 0.01 Outflow (ac-ft) 0.05 0.04 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.06 PAW (ac-ft) 0.01 0.01 0.02 0.03 0.01 0.00 0.00 0.00 0.00 0.02 0.01 0.01 TABLE 4.3-5: Monthly Water Balance for Watershed C2
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 0.12 0.12 0.09 0.05 0.02 0.00 0.00 0.00 0.00 0.04 0.07 0.15 Total Potential Loss
(ac-ft) 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 Outflow (ac-ft) 0.11 0.11 0.08 0.04 0.01 0.00 0.00 0.00 0.00 0.03 0.06 0.14 PAW (ac-ft) 0.00 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.01 0.00 0.00 Olberding Environmental, Inc. 11134.000.005
Quarry Lakes Parkway Mitigation Area October 3, 2025
WATER AVAILABILITY ANALYSIS Revised April 3, 2026
TABLE 4.3-6: Monthly Water Balance for Watershed C3
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 0.16 0.16 0.13 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.09 0.20 Total Potential Loss
(ac-ft) 0.02 0.02 0.03 0.03 0.04 0.04 0.04 0.04 0.03 0.02 0.02 0.02 Outflow (ac-ft) 0.14 0.14 0.10 0.04 0.00 0.00 0.00 0.00 0.00 0.03 0.08 0.18 PAW (ac-ft) 0.01 0.01 0.02 0.03 0.03 0.01 0.00 0.00 0.01 0.02 0.01 0.01 TABLE 4.3-7: Monthly Water Balance for Watershed C4
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 0.16 0.16 0.13 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.09 0.20 Total Potential Loss
(ac-ft) 0.01 0.02 0.02 0.03 0.03 0.03 0.04 0.03 0.02 0.02 0.01 0.02 Outflow (ac-ft) 0.14 0.14 0.10 0.04 0.00 0.00 0.00 0.00 0.00 0.04 0.08 0.18 PAW (ac-ft) 0.01 0.01 0.02 0.02 0.03 0.01 0.00 0.00 0.01 0.02 0.01 0.01 TABLE 4.3-8: Monthly Water Balance for Watershed C5
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Total Inflows (ac-ft) 0.13 0.14 0.11 0.06 0.02 0.00 0.00 0.00 0.01 0.05 0.08 0.17 Total Potential Loss
(ac-ft) 0.01 0.01 0.02 0.02 0.02 0.03 0.03 0.02 0.02 0.01 0.01 0.01 Outflow (ac-ft) 0.12 0.12 0.09 0.04 0.00 0.00 0.00 0.00 0.00 0.03 0.07 0.16 PAW (ac-ft) 0.01 0.01 0.01 0.02 0.02 0.00 0.00 0.00 0.01 0.01 0.01 0.00
4.4 WATER BUDGET CONCLUSIONS
As shown by Table 4.3-1 to Table 4.3-8 above, we expect the wetland areas to be dry for approximately 4 months out of the year between June and September, when potential losses greatly exceed inflows and PAW values are minimal. However, saturated to near-saturated conditions should exist in the proposed wetland areas from October through May.
5.0 CONCLUSION
Land uses upstream of the project are outside of the Contra Costa County urban limit line and are, therefore, expected to remain relatively the same in the future. We expect that any minor modifications to the upstream watershed that could affect run-on flows do not adversely affect the ability of the wetland performance, given the assumptions used in the water balance calculations.
We note that the State Water Resources Control Board regulates the diversion and impoundment of rainfall runoff and, therefore, large diversions of upstream flows are unlikely.
Olberding Environmental, Inc. 11134.000.005
Quarry Lakes Parkway Mitigation Area October 3, 2025
WATER AVAILABILITY ANALYSIS Revised April 3, 2026
Based on the above analyses, the project appears to be feasible from a hydrologic perspective, given the performance criteria we have been provided. If you have any questions or comments regarding this letter, please call, and we will be glad to discuss them with you.
Sincerely,
ENGEO Incorporated
Natasha Marsden Jonathan Buck, PE, GE
jb/ch/rhb/ss
Attachments: Selected References
Figures
Appendix A – Water Balance Calculations
11134.000.005
October 3, 2025
Revised April 3, 2026
SELECTED REFERENCES
1. Alameda County Flood Control & Water Conservation District. 2016. Mean Annual Precipitation. Attachment 6. Revised August 5, 2025.
2. California Irrigation Management Information System. 2025. Pleasanton Gage, Pleasanton, California. 2025.
3. Contra Costa County Public Works Department. 1977. Mean Seasonal Isohyets Compiled from Precipitation Records 1879-1973. Drawing Number B-166. Revised January 1, 2010.
4. Crane, R. 1995. Geology of the Mount Diablo Region, in Geology of the Mount Diablo Region Guidebook, Northern California Geological Society.
5. Graymer, R. W. et al. 1996. Preliminary Geologic Map Emphasizing Bedrock Formations in Alameda County, California. Derived from the Digital Database Open-File 96-252, U.S.Geological Survey.
6. National Climatic Data Center (NCDC) of the National Oceanic and Atmospheric Administration (NOAA). 2025. Daily precipitation for Livermore Station GHCND:USC00044997. https://www.weather.gov/wrh/climate
7. National Conservation Resource Service; www.websoilsurvey.com, Dublin California. 2025.
8. Niswonger et al. 2008. Method for Estimating Spatially Variable Seepage Loss and Hydraulic Conductivity in Intermittent and Ephemeral Streams. Water Resources Research Vol 44. 2008.
9. Rantz, S.E. 1974. Mean annual runoff in the San Francisco Bay Region, California, -70.
Miscellaneous Field Studies Map MF-613, Department of the Interior, States Geological Survey, prepared in cooperation with the California Department of Water Resources, San Francisco Bay Region Environment and Resources Planning Study. 11134.000.005
October 3, 2025
Revised April 3, 2026
FIGURES
Figure 1 – Vicinity Map
Figure 2 – Wetland Area A
Figure 3 – Wetland Area B1
Figure 4 – Wetland Area B2
Figure 5 – Wetland Area C
MANNING ROAD
HIGHLAND ROAD
EAGLE RIDGE PRESERVE BOUNDARY NELSON PROPERTY
WATERSHED A
WATERSHED B1
WATERSHED C1
WATERSHED C2
WATERSHED B2
EAGLE RIDGE
PRESERVE BOUNDARY
CONTRA COSTA COUNTY
/ ALAMEDA COUNTY LINE
WATERSHED C3
WATERSHED C4 WATERSHED C5
Expect Excellence
VICINITY MAP
QUARRY LAKES PARKWAY MITIGATION AREA
LIVERMORE, CALIFORNIA
11134.000.005
AS SHOWN 1
N
0 FEET 900
WATERSHED AREA
SEASONAL WETLAND CREATION
EXISTING DRAINAGE
EPHEMERAL DRAINAGE
LEGEND
WATERSHED A
49.12 ac.
WETLAND AREA A
1.48 ac.
9-INCH CULVERT
18-INCH CULVERT
Expect Excellence
WETLAND AREA A
QUARRY LAKES PARKWAY MITIGATION AREA
LIVERMORE, CALIFORNIA
11134.000.005
AS SHOWN 2
N
0 FEET 400
WATERSHED AREA
SEASONAL WETLAND CREATION
RIPARIAN ENHANCEMENT
RIPARIAN CREATION
EXISTING DRAINAGE
EPHEMERAL DRAINAGE
LEGEND
WATERSHED B1
64.80 ac.
WETLAND AREA B1
1.21 ac.
Expect Excellence
WETLAND AREA B1
QUARRY LAKES PARKWAY MITIGATION AREA
LIVERMORE, CALIFORNIA
11134.000.005
AS SHOWN 3
N
0 FEET 400
WATERSHED AREA
SEASONAL WETLAND CREATION
RIPARIAN ENHANCEMENT
RIPARIAN CREATION
EXISTING DRAINAGE
EPHEMERAL DRAINAGE
LEGEND
WATERSHED B2
5.24 ac.
WETLAND AREA B2
0.33 ac.
Expect Excellence
WETLAND AREA B2
QUARRY LAKES PARKWAY MITIGATION AREA
LIVERMORE, CALIFORNIA
11134.000.005
AS SHOWN 4
N
0 FEET 300
WATERSHED AREA
SEASONAL WETLAND CREATION
RIPARIAN ENHANCEMENT
RIPARIAN CREATION
EXISTING DRAINAGE
EPHEMERAL DRAINAGE
LEGEND
WATERSHED C2
5.50 ac.
WATERSHED C1
1.84 ac.
WETLAND AREA C1
0.11 ac.
18-INCH CULVERT
WATERSHED C3
7.11 ac.
WETLAND AREA C3
0.10 ac.
WETLAND AREA C4
0.08 ac.
WETLAND AREA C5
0.06 ac.
WETLAND AREA C2
0.04 ac.
WATERSHED C4
7.15 ac. WATERSHED C5
6.24 ac.
Expect Excellence
WETLAND AREA C
QUARRY LAKES PARKWAY MITIGATION AREA
LIVERMORE, CALIFORNIA
11134.000.005
AS SHOWN 5
N
0 FEET 400
WATERSHED AREA
SEASONAL WETLAND CREATION
RIPARIAN ENHANCEMENT
RIPARIAN CREATION
EXISTING DRAINAGE
EPHEMERAL DRAINAGE
LEGEND
N
11134.000.005
October 3, 2025
Revised April 3, 2026
APPENDIX A
Water Balance Calculations
Table 4.1-1: Montly Water Inflows for Proposed Wetland A Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 49.12 49.12 49.12 49.12 49.12 49.12 49.12 49.12 49.12 49.12 49.12 49.12 49.12 (10%) Upstream Inflows (ac-ft) 0.97 1.00 0.79 0.42 0.18 0.03 0.00 0.00 0.04 0.34 0.57 1.22 5.56 Wetland Area (ac) 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 (100%) Project Direct Rainfall (ac-ft) 0.29 0.30 0.24 0.13 0.05 0.01 0.00 0.00 0.01 0.10 0.17 0.37 1.68 Table 4.2-2: Monthly Water Outflow for Watershed A
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.4 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 1.48 Evapotranspiration (ac-ft) 0.13 0.20 0.31 0.42 0.54 0.62 0.66 0.58 0.43 0.31 0.17 0.12 4.50 Infiltration (5% of Inflow) 0.05 0.05 0.04 0.02 0.01 0.00 0.00 0.00 0.00 0.02 0.03 0.06 0.28 Table 4.3-1: Monthly Water Balance for Watershed A
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 1.26 1.30 1.02 0.55 0.23 0.04 0.00 0.01 0.05 0.44 0.75 1.59 7.24 Total Potential Loss (ac-ft) 0.18 0.25 0.35 0.44 0.55 0.62 0.66 0.58 0.44 0.33 0.20 0.18 4.77 Outflow (ac-ft) 1.08 1.05 0.67 0.11 0.00 0.00 0.00 0.00 0.00 0.12 0.55 1.41 4.98 PAW (ac-ft) 0.13 0.20 0.31 0.42 0.23 0.04 0.00 0.01 0.05 0.31 0.17 0.12 1.99 Table 4.1-2: Montly Water Inflows for Proposed Wetland B1 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 64.80 64.80 64.80 64.80 64.80 64.80 64.80 64.80 64.80 64.80 64.80 64.80 64.80 (10%) Upstream Inflows (ac-ft) 1.28 1.31 1.04 0.55 0.24 0.05 0.00 0.01 0.05 0.45 0.76 1.61 7.34 Wetland Area (ac) 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 (100%) Project Direct Rainfall (ac-ft) 0.24 0.25 0.19 0.10 0.04 0.01 0.00 0.00 0.01 0.08 0.14 0.30 1.37 Table 4.2-3: Monthly Water Outflow for Watershed B1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 1.21 Evapotranspiration (ac-ft) 0.11 0.16 0.26 0.34 0.45 0.51 0.54 0.47 0.36 0.25 0.14 0.10 3.68 Infiltration (5% of Inflow) 0.06 0.07 0.05 0.03 0.01 0.00 0.00 0.00 0.00 0.02 0.04 0.08 0.37 Table 4.3-2: Monthly Water Balance for Watershed B1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 1.52 1.56 1.23 0.66 0.28 0.05 0.00 0.01 0.06 0.54 0.90 1.91 8.71 Total Potential Loss (ac-ft) 0.17 0.23 0.31 0.37 0.46 0.51 0.54 0.47 0.36 0.28 0.18 0.18 4.04 Outflow (ac-ft) 1.34 1.33 0.92 0.29 0.00 0.00 0.00 0.00 0.00 0.26 0.72 1.73 6.60 PAW (ac-ft) 0.11 0.16 0.26 0.34 0.28 0.05 0.00 0.01 0.06 0.25 0.14 0.10 1.76 Table 4.1-3: Montly Water Inflows for Proposed Wetland B2 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 (10%) Upstream Inflows (ac-ft) 0.10 0.11 0.08 0.04 0.02 0.00 0.00 0.00 0.00 0.04 0.06 0.13 0.59 Wetland Area (ac) 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 (100%) Project Direct Rainfall (ac-ft) 0.07 0.07 0.05 0.03 0.01 0.00 0.00 0.00 0.00 0.02 0.04 0.08 0.37 Table 4.2-4: Monthly Water Outflow for Watershed B2
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 0.33 Evapotranspiration (ac-ft) 0.03 0.04 0.07 0.09 0.12 0.14 0.15 0.13 0.10 0.07 0.04 0.03 1.00 Infiltration (5% of Inflow) 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 Table 4.3-3: Monthly Water Balance for Watershed B2
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 0.17 0.17 0.14 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.10 0.21 0.97 Total Potential Loss (ac-ft) 0.03 0.05 0.07 0.10 0.12 0.14 0.15 0.13 0.10 0.07 0.04 0.03 1.03 Outflow (ac-ft) 0.13 0.12 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.06 0.18 0.56 PAW (ac-ft) 0.03 0.04 0.07 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.04 0.03 0.39 Table 4.1-4: Montly Water Inflows for Proposed Wetland C1 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 1.84 1.84 1.84 1.84 1.84 1.84 1.84 1.84 1.84 1.84 1.84 1.84 1.84 (10%) Upstream Inflows (ac-ft) 0.04 0.04 0.03 0.02 0.01 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.21 Wetland Area (ac) 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 (100%) Project Direct Rainfall (ac-ft) 0.02 0.02 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.03 0.12 Table 4.2-5: Monthly Water Outflow for Watershed C1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 Evapotranspiration (ac-ft) 0.01 0.01 0.02 0.03 0.04 0.05 0.05 0.04 0.03 0.02 0.01 0.01 0.33 Infiltration (5% of Inflow) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 Table 4.3-4: Monthly Water Balance for Watershed C1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 0.06 0.06 0.05 0.03 0.01 0.00 0.00 0.00 0.00 0.02 0.03 0.07 0.33 Total Potential Loss (ac-ft) 0.01 0.02 0.02 0.03 0.04 0.05 0.05 0.04 0.03 0.02 0.01 0.01 0.34 Outflow (ac-ft) 0.05 0.04 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.06 0.19 PAW (ac-ft) 0.01 0.01 0.02 0.03 0.01 0.00 0.00 0.00 0.00 0.02 0.01 0.01 0.13 Table 4.1-5: Montly Water Inflows for Proposed Wetland C2 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 5.50 5.50 5.50 5.50 5.50 5.50 5.50 5.50 5.50 5.50 5.50 5.50 5.50 (10%) Upstream Inflows (ac-ft) 0.11 0.11 0.09 0.05 0.02 0.00 0.00 0.00 0.00 0.04 0.06 0.14 0.62 Wetland Area (ac) 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 (100%) Project Direct Rainfall (ac-ft) 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.05 Table 4.2-6: Monthly Water Outflow for Watershed C2
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 Evapotranspiration (ac-ft) 0.00 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.01 0.01 0.00 0.00 0.12 Infiltration (5% of Inflow) 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 Table 4.3-5: Monthly Water Balance for Watershed C2
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 0.12 0.12 0.09 0.05 0.02 0.00 0.00 0.00 0.00 0.04 0.07 0.15 0.67 Total Potential Loss (ac-ft) 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.01 0.01 0.01 0.01 0.15 Outflow (ac-ft) 0.11 0.11 0.08 0.04 0.01 0.00 0.00 0.00 0.00 0.03 0.06 0.14 0.57 PAW (ac-ft) 0.00 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.07 Table 4.1-6: Montly Water Inflows for Proposed Wetland C3 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 7.11 7.11 7.11 7.11 7.11 7.11 7.11 7.11 7.11 7.11 7.11 7.11 7.11 (10%) Upstream Inflows (ac-ft) 0.14 0.14 0.11 0.06 0.03 0.00 0.00 0.00 0.01 0.05 0.08 0.18 0.81 Wetland Area (ac) 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 (100%) Project Direct Rainfall (ac-ft) 0.02 0.02 0.02 0.01 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.02 0.11 Table 4.2-7: Monthly Water Outflow for Watershed C3
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 Evapotranspiration (ac-ft) 0.01 0.01 0.02 0.03 0.04 0.04 0.04 0.04 0.03 0.02 0.01 0.01 0.30 Infiltration (5% of Inflow) 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.04 Table 4.3-6: Monthly Water Balance for Watershed C3
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 0.16 0.16 0.13 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.09 0.20 0.92 Total Potential Loss (ac-ft) 0.02 0.02 0.03 0.03 0.04 0.04 0.04 0.04 0.03 0.02 0.02 0.02 0.34 Outflow (ac-ft) 0.14 0.14 0.10 0.04 0.00 0.00 0.00 0.00 0.00 0.03 0.08 0.18 0.73 PAW (ac-ft) 0.01 0.01 0.02 0.03 0.03 0.01 0.00 0.00 0.01 0.02 0.01 0.01 0.15 Table 4.1-7: Montly Water Inflows for Proposed Wetland C4 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 7.15 (10%) Upstream Inflows (ac-ft) 0.14 0.15 0.11 0.06 0.03 0.00 0.00 0.00 0.01 0.05 0.08 0.18 0.81 Wetland Area (ac) 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 (100%) Project Direct Rainfall (ac-ft) 0.02 0.02 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.02 0.09 Table 4.2-8: Monthly Water Outflow for Watershed C4
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 Evapotranspiration (ac-ft) 0.01 0.01 0.02 0.02 0.03 0.03 0.04 0.03 0.02 0.02 0.01 0.01 0.24 Infiltration (5% of Inflow) 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.04 Table 4.3-7: Monthly Water Balance for Watershed C4
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 0.16 0.16 0.13 0.07 0.03 0.01 0.00 0.00 0.01 0.06 0.09 0.20 0.90 Total Potential Loss (ac-ft) 0.01 0.02 0.02 0.03 0.03 0.03 0.04 0.03 0.02 0.02 0.01 0.02 0.28 Outflow (ac-ft) 0.14 0.14 0.10 0.04 0.00 0.00 0.00 0.00 0.00 0.04 0.08 0.18 0.73 PAW (ac-ft) 0.01 0.01 0.02 0.02 0.03 0.01 0.00 0.00 0.01 0.02 0.01 0.01 0.13 Table 4.1-8: Montly Water Inflows for Proposed Wetland C5 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Average Monthly Precipitation (in.) 2.37 2.43 1.92 1.02 0.44 0.08 0.00 0.01 0.09 0.84 1.40 2.98 13.59 Upstream Watershed (ac) 6.24 6.24 6.24 6.24 6.24 6.24 6.24 6.24 6.24 6.24 6.24 6.24 6.24 (10%) Upstream Inflows (ac-ft) 0.12 0.13 0.10 0.05 0.02 0.00 0.00 0.00 0.00 0.04 0.07 0.16 0.71 Wetland Area (ac) 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 (100%) Project Direct Rainfall (ac-ft) 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.07 Table 4.2-9: Monthly Water Outflow for Watershed C5
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Monthly Evapotranspiration (inches) 1.54 2.28 3.63 4.82 6.31 7.19 7.64 6.68 5.03 3.58 1.97 1.40 52.07 Adusted Evapotranspiration (inches) 1.08 1.60 2.54 3.37 4.42 5.03 5.35 4.68 3.52 2.51 1.38 0.98 36.45 Project Watershed (ac) 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 Evapotranspiration (ac-ft) 0.01 0.01 0.01 0.02 0.02 0.03 0.03 0.02 0.02 0.01 0.01 0.00 0.18 Infiltration (5% of Inflow) 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.04 Table 4.3-8: Monthly Water Balance for Watershed C5
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Total Inflows (ac-ft) 0.13 0.14 0.11 0.06 0.02 0.00 0.00 0.00 0.01 0.05 0.08 0.17 0.77 Total Potential Loss (ac-ft) 0.01 0.01 0.02 0.02 0.02 0.03 0.03 0.02 0.02 0.01 0.01 0.01 0.22 Outflow (ac-ft) 0.12 0.12 0.09 0.04 0.00 0.00 0.00 0.00 0.00 0.03 0.07 0.16 0.64 PAW (ac-ft) 0.01 0.01 0.01 0.02 0.02 0.00 0.00 0.00 0.01 0.01 0.01 0.00 0.10