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City of Pleasanton—Hidden Canyon Residences and Preserve Draft EIR Biological Resources FirstCarbon Solutions 3.3-43 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480016/EIR/3 - Draft EIR/21480016 Sec03-03 Bio Resources.docx • Identify adaptive management procedures that accommodate uncertainty that comes with wetland creation projects. These include (but are not limited to) measures to address colonization by invasive species, unexpected lack of water, excessive foraging of installed wetland plants by wildlife, etc. • Define management and maintenance activities (weeding, repair of water delivery systems and browsing protection, etc.). • Provide for surety in funding for MMP and for in-perpetuity preservation and management of created wetland habitats. Level of Significance After Mitigation Less than significant impact. Fish and Wildlife Movement Corridors Impact BIO-4: The proposed project would not interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of wildlife nursery sites. Impact Analysis The proposed conservation area contains grassland, mixed oak woodland, and mixed riparian woodland. Because the conservation area supports a mosaic of habitats that can be used by many different types of species, the conservation area is likely to act as a movement corridor for more species than other areas supporting a single habitat type. The mosaic of habitats within the proposed conservation area would help to facilitate the movement of wildlife regionally through a known important wildlife linkage/corridor and likely acts as core habitat for multiple regional species. Expanding protected open space in the local vicinity of the project site in the form of the proposed conservation area would help to maintain a portion of this wildlife linkage/corridor in perpetuity. However, the project as proposed will preserve approximately 104.6 acres of on-site land outside of the grading envelope which includes a mosaic of grassland, oak woodland, and riparian woodland/aquatic habitats, much of which is contiguous with other off-site open space to the north, west, and south of the project site, while impacting approximately 24 acres of primarily grassland habitat that is mostly concentrated in the eastern portion of the project site and closer to existing off-site development. After this area is developed, large areas of grassland habitats in surrounding lands will remain. Native wildlife currently using the creek corridors on the project site during movement and foraging activities will likely continue to use these corridors. This suggests that the proposed project, when considered by itself, will neither result in a wildlife population dropping below self-sustaining levels nor threaten to eliminate an animal community nor result in an impediment to movement between habitats on and off-site. The preservation of approximately 104.6 acres of habitats that include the most important contiguous habitat and movement corridors, would compensate for the loss of 23.89 acres of habitat impacted by development. Therefore, impacts to native wildlife due to the loss of habitat resulting from the proposed project are considered less than significant under CEQA.