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5.0 Environmental Analysis 5.1 Land Use <br />Avion Project SEIR <br />Page 5.1-9 <br />would maintain and slightly improve the conservation, configuration, and area of <br />significantly or sufficiently conserved habitats within this portion of the MHPA. <br />Effects to Covered Species <br />• The approved land exchange in this portion of the MHPA would maintain the overall <br />conservation of covered species, as no covered species occur within the area to be deleted <br />from the MHPA. The addition of southern mixed chaparral and non-native grassland <br />habitats within the lands to be added to the MHPA may increase habitat for covered species <br />that may occur in the vicinity of the project (e.g., coastal California gnatcatcher [Polioptila <br />californica californica], Cooper’s hawk [Accipiter cooperii]). <br />Effects on Habitat Linkages and the Function of Preserve Areas <br />• The project site is part of, and adjacent to, an existing open space area. Although it is <br />reasonable to assume that wildlife may currently move locally through the project area, the <br />site is somewhat restricted by residential development and paved roads in the Heritage <br />Bluffs II project to the northeast. Currently, local wildlife movement may occur on the Avion <br />site to the west, east, and south as the site is adjacent to MHPA lands within the <br />undeveloped Black Mountain Park Open Space. In addition, some local north-south wildlife <br />movement is possible along the ephemeral drainages that occur in the bottoms of the <br />canyons. The proposed private drive crossing of the eastern drainage would be constructed <br />as an arch culvert with a span of approximately 42 feet wide and 21 feet high, a span and <br />height that would continue to allow local wildlife movement through this area. <br />Although the Avion project would have minor affects to the existing habitat linkages to the <br />southwest of the Heritage Bluffs II project through the loss of habitat, the MHPA boundary <br />adjustment would offset this affect through the preservation of habitat linkages along the <br />west, east, and south sides of the project where newly added MHPA area would occur. The <br />addition of these conserved lands would preserve the local habitat linkages in these <br />directions. <br />Therefore, effects of the approved changes to the MHPA boundary would be negligible with <br />respect to the function of the preserve area and habitat linkages. All of the changes <br />approved are adjacent to a major wildlife corridor and associated linkages that would <br />remain intact with linkages present. <br />Effects on Preserve Configuration and Management <br />• The proposed modifications to the MHPA boundary do not change the proportions or <br />decrease the total area of the MHPA. The minor changes in shape or length of edges of the <br />MHPA boundary are due to relatively small encroachments by the project. These minor <br />encroachments into the MHPA would be offset by gains in native habitat acreage primarily <br />on the southern portion of the site. The resulting MHPA preserve area configuration would <br />be similar to the pre-construction condition and include the addition of land to the MHPA. <br />The approved changes to the MHPA boundary would not conflict with any of the previously