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Mountain House Specific Plan III — ........................................................................................................................................................................... A 230 kV power transmission line passes through the community in an easement that is restricted to — certain uses. Safety considerations for this line are covered in Chapter Six: Public Health and Safety. Siting of all major electrical facilities at Mountain House is subject to approval of the California Public _ Utility Commission. A 20%margin of safety is provided in determining community power needs to provide protection against power interruptions. Public health and safety issues will be considered in developing and implementing the electric transmission and distribution systems. All development will adhere to restrictions of use applicable to areas within the easement rights-of-way of primary power transmission lines, including setbacks along either side of the 230 kV line. The 230KV Rio Oso-Tesla transmission-line easement will be designated for open space uses when it passes through residential areas.Where the transmission line passes through industrial, commercial, and public land uses,it will reflect that land use designation but uses under or _ adjacent to the easement will be restricted to uses compatible with the easement, such as parking lots. 8.2.2 Specific Plan III Description The Modesto Irrigation District(MID)is the electricity provider for the entire Mountain House community. The existing MID substation on Kelso Road is designed to be able to serve the entire Mountain House community,however,additional switchgear and transformers need to be added as the connected electrical load increases.Equipment can be added in increments as needed and the facility was designed to be able to flexibly serve the needs of a growing community. Primary electrical distribution voltage is available in existing joint trench facilities at the intersections of Central Parkway and DeAnza — Boulevard with Mascot Boulevard. The joint trench system will be extended to the area south of Grant Line Road along Central and DeAnza as needed for service distribution to the Specific Plan III area. See — Figure 8.1. PG&E electrical distribution pole lines exist along the south side of Grant Line Road and the west side of Mountain House Parkway. The lines serve PG&E customers outside of Mountain House,and must remain in service. It is possible for interim electric service requirements,through an agreement with MID, for Specific Plan III properties to take power from these PG&E lines temporarily.Ultimately,power to all of the properties within Mountain House must be provided by MID. The PG&E overhead pole lines will need to be placed underground in conjunction with the widening and ultimate improvement of Grant Line Road and Mountain House Parkway. This means that there will be parallel underground electric facilities, _ those owned by PG&E and those owned by MID. This will be an additional cost to the developers to underground the existing PG&E pole lines. 8-2 Draft 03/14/05 ...........................................................................................................................................................................