6. SITE-SPECIFIC CONDITIONS AND RECOMMENDATIONS (continued)

6.11   CORONA HEIGHTS

Corona Heights is located in the central portion of San Francisco in the Corona Heights and Duboce Triangle neighborhoods, just south of Buena Vista Park (Figure ES-1). Corona Heights is bounded in part by Flint Street on the east, Roosevelt Way to the north, and 16^th Street to the south. The Natural Area of Corona Heights is composed of grasslands with scrub and tree-dominated areas along the Natural Area boundary. This Natural Area is almost entirely underlain by Franciscan chert bedrock.  Small areas of Franciscan sandstone and greenstone occur at lower elevations at the northwest end of the park, but most of the rock is buried under a layer of slope debris.  Small populations of San Francisco gumplant and Johnny-jump-up are found in two areas on the southern grasslands of Corona Heights.  No sensitive wildlife species are known to occur within the Natural Area of Corona Heights.

6.12   DUNCAN-CASTRO

The Duncan-Castro Natural Area is located northeast of the intersection of Castro and Duncan Streets in San Francisco near the west end of a city block bounded by 27^th, Noe, Duncan and Newburg Streets (Figure ES-1). At less than eight-tenths of an acre, Duncan-Castro is the smallest designated Natural Area in the City of San Francisco. The Natural Area at Duncan-Castro is almost entirely grasslands. Johnny-jump-up occurs within the grasslands and rock outcrops of Duncan-Castro. No sensitive wildlife species are known to occur within the Natural Area of Duncan-Castro. (Top of page)

6.13   KITE HILL

Kite Hill is located in the central portion of San Francisco, near the intersection of 19^th and Yukon Streets (Figure ES-1). This Natural Area is almost entirely underlain by Franciscan chert and greenstone bedrock. Wild oat grassland covers the largest area at Kite Hill. The only two scrub series mapped consisted of small patches of native poison oak scrub and non-native Himalayan blackberry. None of the species designated as sensitive for this management plan have been observed within Kite Hill. (Top of page)

6.14  TANK HILL

Tank Hill is located in central San Francisco near Golden Gate Park and the Buena Vista Natural Area, adjacent to Clarendon Avenue (Figure ES-1). Tank Hill is almost entirely underlain by Franciscan chert bedrock. Vegetation at Tank Hill is a combination of non-native grassland, blue gum forest, and non-native scrub. Three of the species designated as sensitive for this management plan have been recently observed on Tank Hill:  Broadleaf stonecrop, Farewell-to-spring (Clarkia rubicundd), and Johnny-jump-up.  No sensitive wildlife species are known to occur within the Natural Area of Tank Hill. (Top of page)

6.15  GOLDEN GATE PARK (OAK WOODLAND, WHISKEY HILL, AND STRAWBERRY HILL)

The Oak Woodlands of Golden Gate Park is in the eastern portion of the park between Fulton Street and Lincoln Way in northwestern San Francisco (Figure ES-1).  Other Natural Areas included in this discussion are Strawberry Hill (in the center of Stow Lake) and Whiskey Hill (due west of Kezar Stadium).  Soils in the Golden Gate Park Natural Areas are comprised almost entirely of Sirdrak sand, and are highly susceptible to water and wind erosion. Vegetation within the Natural Areas is dominated by a forest series with smaller areas of scrub and grassland habitat.  The coast live oak forest within these areas represents the majority of oak woodland habitat within the Significant Natural Areas.  Dune tansy, a sensitive species, has been reintroduced into openings within the Oak Woodlands.  Sensitive wildlife species reported from Oak Woodlands include California quail, western screech owl (Otus kennicottii), and assorted raptors.

6.16  15™ AVENUE STEPS

The 15^th Avenue Steps Natural Area is located in the Golden Gate Heights area of San Francisco (Figure ES-1).  This Natural Area is adjacent to the extension of 15* Avenue between Kirkham Street on the north and Lawton Street on the south. This Natural Area consists of dune sand overlying Franciscan chert bedrock.  Coast live oak, California blackberry scrub, and a small patch of Italian ryegrass/California blackberry mosaic were mapped at 15^th Avenue Steps.  None of the species designated as sensitive for this management plan have been observed within this Natural Area.