Environmental Impact Statement - Sonoma Land Trust

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California Department of Fish and Game U.S. Fish and Wildlife Service Section 3.5. Biological Resources (approximately 955 acres of restored tidal salt marsh habitat). In the interim the project site will provide open water and mudflat habitat as well as long stretches and various patches of tidal marsh and ecotone habitat. To ensure that impacts to tidal salt marsh habitat are fully compensated, SLT will enact Mitigation Measure BIO-MM-1. With mitigation, impacts to tidal salt marsh habitat are considered less than significant. Conclusion: Less than Significant with Mitigation. Mitigation Measure BIO-MM-1: Ensure Establishment of Tidal Salt Marsh Habitat within 5 Years of Project Completion. SLT or USFWS and CDFG as successor property owners willshall monitor the restoration site following the completion to ensure that, at an absolute minimum, impacted tidal salt marsh habitat is replaced at a 3:1 ratio within 5 years of completion of the Proposed Action. For breach Options 1 and 2 the compensation goal will be 1.8 acres of tidal salt marsh habitat and for Option 3 the goal will be 15.5 acres of tidal salt marsh habitat. SLT willProject. If SLT conducts the monitoring, SLT shall report to USFWS and CDFG on the status of monitoring once a year during the 5 years following project completion. Once achieved, SLT willshall notify USFWS and CDFG that the compensation ratio has been satisfied. If the required ratio is not achieved within the first 5 years following project completion, SLT will create tidal salt marsh habitat at the restoration site in consultation with USFWS and CDFG and monitor until the compensation ratios are achieved. shall consult with USFWS and CDFG to determine the causes for the delay in tidal marsh development, and shall work with USFWS and CDFG to develop and implement appropriate adaptive management activities. Full-Tidal Alternative Impacts from the temporary loss of tidal marsh habitat resulting from restoration under the Full-Tidal Alternative would be the same as that described above for the Project. Therefore, with Mitigation Measure BIO-MM-1, impacts to tidal salt marsh habitat from the Full-Tidal Alternative are considered less than significant. Conclusion: Less than Significant with Mitigation. Impact BIO-4: Loss of Special-Status Plant Populations Proposed Project No special-status plant species have been documented on the Project site (Wetlands and Water Resources 2005b). Special-status plant species with low to moderate potential to occur within the Action area include several grassland species and species associated with agricultural fields and diked seasonal wetlands such as papoose tarplant (Centromadia parryi ssp. parryi) [CNPS 1B], Sears Point Wetland and Watershed Restoration Project Final Environmental Impact Report/Environmental Impact Statement 3.5-34 April 2012
California Department of Fish and Game U.S. Fish and Wildlife Service Section 3.5. Biological Resources hayfield tarplant (Hemizonia congesta ssp. congesta) [CNPS 1B], and Michael’s rein orchid (Piperia michaelii) [CNPS 4]. Enhancements to of the 40 acres of seasonally saturated annual grasslands, vernal pools, and alkali seasonal wetlands north of Highway 37, as described above,California red-legged frog habitat may result in the loss of individuals if it is determined they occur at within the Action area. Saline clover (Trifolium depauperatum var. hydrophilum)[CNPS 1B] also has moderate potential to occur in saline soils along the margins of seasonal wetlands on the site. The number of plants that may be lost cannot be determined because the number of plants present in the population has not been reported. However, it is not anticipated that this population would be extirpated by enhancement activities as prior field surveys have not identified saline clover populations within areas of proposed enhancement activities (Wetlands and Water Resources 2007). Impacts to tidal salt marsh habitat associated with dredging inbreaching along Tolay Creek under all of the breaching and dredging options could impact Mason's lilaeopsis, which is known to occur at the mouth of Tolay Creek and could have broader distribution within tidal salt marsh habitat in the Action area. All potential impacts to special-status plants within the Action area are considered potentially significant. Implementation of Mitigation Measures BIO- MM-2a and BIO-MM2b would reduce this impact to a less-than-significant level. Mitigation Measure BIO-MM-2a: Survey for Special Status Plants. Special-status plant surveys will be conducted within 1 year prior to initiating construction. The purpose of these surveys willshall be to verify that the locations of special-status plants identified in previous surveys are extant, identify any new special-status plant occurrences, and cover any portions of the project area not previously identified. The extent of mitigation offor the direct loss of or indirect impacts on special-status plants willshall be based on these survey results. Locations of special-status plants in proposed construction areas will be recorded using a global positioning system (GPS) unit and flagged. Surveys shall be timed so that plant surveys occur during the flowering periods of the potential species of interest. If initial screening by a qualified biologist identifies the potential for specialstatus plant species to be directly or indirectly affected by a site-work in a specific project area, the biologist will establishdetermine appropriate protective measures to minimize the impact to the plant species. These measures may include, among others, establishing an adequate buffer area to exclude activities that would directly remove or alter the habitat of an identified special-status plant population or result in indirect adverse effects on the species’ habitat. The project proponents will oversee installation of a temporary, plastic mesh–type construction fence (Tensor Polygrid, gathering seed, or equivalent) at least 1.2 meters (4 feet) tall around anyrelocating individual specimens. Any established buffer areas shall be clearly marked by a qualified biologist to prevent encroachment by construction vehicles and personnel. A qualified biologist Sears Point Wetland and Watershed Restoration Project Final Environmental Impact Report/Environmental Impact Statement 3.5-35 April 2012
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Sears Point Wetland and Watershed R
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Sears Point Wetland and Watershed R
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Contents List of Tables ...........
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California Department of Fish and G
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Executive Summary This summary prov
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Table ES-1. Summary of Impacts and
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Table ES-1. Continued Page 3 of 141
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Table 1-1. List of Local, State, an
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Table 1-1. Continued Page 3 of 3 Ag
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Table 2-2. Action Alternatives Cons
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Chapter 3 Affected Environment and
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Section 3.1 Geology, Soils, and Pal
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Section 3.2 Surface-Water Hydrology
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Section 3.3 Water Quality Introduct
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Section 3.4 Public Health and Safet
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Section 3.11 Air Quality Introducti
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Section 3.12 Noise Introduction Thi
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Section 3.15 Environmental Justice
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Chapter 4 Consultation and Other Re
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Sonoma Land Trust Chapter 4. Consul
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Chapter 5 Public Involvement and Sc
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Sonoma Land Trust Chapter 7. Refere
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Environmental Impact Statement - Sonoma Land Trust

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