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Alameda County Altamont Landfill Open Space Fund Application for Grant Funding East Bay Regional Park District Tehan Falls Property Acquisition Pleasanton Ridge Regional Park FUNDING CRITERIA 1. Significant Native Biodiversity Value Tehan Canyon and Tehan Creek traverses the entire property which consists of rolling to steeply sloping topography and includes a mix of oak woodland, an oak-bay riparian corridor, mixed chaparral, grassland, creeks, seeps and springs. A significant feature of the property is Tehan Falls, a seasonal waterfall in a heavily wooded area estimated at a height of 60 feet. Arboreal vegetation consists of coast live oak, black oak, California bay-laurel, sycamore and arroyo willow. Other woody plants include coyote brush, snowberry, sticky monkey . flower, coffeeberry, jimbmsh, toyon and blackberry. Six species of ferns are also present. This environment provides critical habitat for various rare, threatened or endangered species, including Alameda whipsnake, California tiger salamander, and California red-legged frog. Other species supported by the property's rich habitat include mountain lion, bobcat, deer, golden eagle and other raptors. Corridors Acquisition of this property will add a critical connection to established parklands by linking the Ill-acre Ganns Ranch, purchased by the Park District in 1994, with the other 4,850 acres of the park. Acquisition of this important connection will protect this open space from fragmentation by development and protect the natural habitat. Riparian habitats in general are threatened throughout California. Ranked among the most valuable habitats to wildlife, they also enhance adjacent upland habitats such as grasslands. The riparian corridor on this property supports a number of threatened or endangered species such as the California red-legged frog and the Alameda whipsnake. Numerous raptors such as the golden eagle and prairie falcon are dependent on prey which forage in this riparian area This corridor also supports other species such as deer, mountain lion, coyote and various other mammals, amphibians and reptiles. Acquisition of this land will protect it from residential development and preserve a valuable wildlife corridor and habitat by connecting this acreage to the existing parkland. With this additional acreage, Pleasanton Ridge Regional Park will total nearly 5,000 acres of contiguous open space that will be pennanently protected. 1