11 ATTACHMENT 7 - Laserfiche WebLink

In Figure 3, the photographer is looking across and over the Kottinger Ranch development and Hearst Drive which provides access to the proposed project. The City's existing water tank and access road are shown within the lower right hand quadrant of the aerial. The Vintage Hill Elementary School is shown near the lower, left-hand corner of the photograph. This photograph shows the site's diverse topography and how it has been developed to date. Access Primary access to the site is from Hearst Drive, a residential collector street that connects to Bernal Avenue and serves the Kottinger Ranch subdivision. There is also access to the site from the Grey Eagle Estates subdivision to the north via easements to the City. The lower portion of Hearst Drive provides a through connection through the Kottinger Ranch development between Bernal Avenue and Concord Street and Touriga Drive. These two streets, in turn, provide through connections to the Vintage Hill Elementary School, Kottinger Neighborhood Park, Bernal Avenue and Vineyard Avenue, and the existing residential neighborhoods to the north and northeast of the Kottinger Ranch development. Topography The project site is located at the southwestern margin of the Livermore-Amador Valley characterized by being a rugged, diverse, hillside landscape. The highest elevations, up to 1,020 feet above mean sea level, occur in the southeastern portion of the project site. Ridge tops are up to several hundred feet wide and slope gently to moderately toward the northwest with atwo- to seven-percent slope grade. The side slopes of the ridges have slope grades averaging approximately 20 percent or greater. Wetlands The Oak Grove site is dominated by a series of intermittent and ephemeral stream and creek channels and intervening upland areas. Most of the creek channels and ridges follow a northwest to southeast direction. Two wetland plant communities are found in small portions of the project site. Biology The site also supports a biologically diverse plant and animal community. Prominent wildlife habitats on the project site include annual grassland, oak woodland, riparian woodland, and wetlands. These habitat areas support a variety of animal species. Site vegetation is comprised primarily of non-native grassland and blue oak woodland, with interspersed small areas of Diablan sage scrub. The site contains over 12,000 trees and most comprise the blue oak woodland plant community in groupings throughout the project site, with some scattered trees in the grassland areas. III. PROJECT DESCRIPTION Proposed Site Design The development plan, Figure 4 on the following page, shows the proposed lots, open space area, stockpile areas, major drainage courses/habitat areas, existing and PUD-33 Page 7 of 59 June 13, 2007