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MOUNTAIN HOUSE PROPOSED ALTAMONT HEIGHTS TENTATIVE MAP 2.0 PROJECT DESCRIPTION retaining wall maintenance casement. A retaining wall three feet high or less would be installed along the southern boundary of flag Lot 50 and 51. Along the west side of the property, adjacent to lots 50 and 52, plans show a retaining wall up to seven feet high with five-foot maintenance easement, an eight-foot wide landscape buffer and an agriculture fence. On the east side of the property, the collector street will be landscaped with an 8-foot- wide public landscaped easement to allow for consistency with the MHCSD Design Manual and SPIII standards. On the south side of the property, there is no prescribed landscape or treatment format since the property backs up to the proposed Delta College site. Parks The project site is located near a neighborhood park, approximately 400 feet from the northeast corner of the project site. According to the applicant's submittal package, there are no plans to provide parks or open space on the project site (Pegasus Development, 2006). Infrastructure Road System The project site is served by a residential collector street system that extends in a loop system off of"F" Street (refer to Figure 2-4)_ These streets contain two travel lanes, each 18-feet wide, and a 5-foot-wide sidewalk on both sides of the street. The loop system consists of "H" Street, "D" Street and"C" Street. Three local residential streets, "B" Court, "A" Court as well as a third unnamed court, extend off of the street loop system. The local streets (courts) contain two travel lanes, each 18-feet wide, and a 4-foot-wide sidewalk. Drainage The storm drain system within the proposed development will be constructed in the street right-of-way prior to paving. The proposed drainage facilities will include 15-inch and 18- inch pipelines extending to catch basins(drop inlets) installed at intervals along the streets. The storm drain collection system will eventually connect to the proposed 18-inch storm drainpipe in "F" Street. During construction, filters will be inserted into all catch basins for sediment control. Maintenance of the filters will be performed per the specifications and in accordance with the MHCSD requirements. Upon completion of the project, the MHCSD will assume maintenance of the storm drain system. Off-site storm water runoff that primarily originates from the hill farmlands to the west of the project site, as well as seepage from the California Aqueduct, enters the property at the western border and flows through the riparian corridor that crosses the site. The off-site storm water runoff will be rerouted through the project site via a separate 48-inch pipeline that will be connected to the proposed 48-inch storm drainpipe stub located in the northeast corner of the project site (Pegasus Development, 2006). In keeping with the policies of the 1994 Master flan, the applicant or builder will be required to prepare a post-development Storm Water Master Plan (SWMP) that includes provisions addressing: (1)public education and outreach on stormwater impacts; (2) public 2-6