SU0013949 - Laserfiche WebLink

Home Browse Search

FtPER Power Systems Design 2033 N. Main St.STE 200 SYSTEMS �� Walnut Creek,CA 94596 Phone:925-933-8485 July 27, 2020 River Islands at Lathrop Attn: Mr. Ramon Batista 73 Stewart Road Lathrop, CA 95330 Subject: River Islands at Lathrop Master Plan Electric and Natural Gas Utility Loads and Planned Ultimate System Capabilities Dear Mr. Batista: Pursuant to our recent discussion, this transmittal is to provide information relevant to the requirements and capabilities of electric and gas utilities within the comprehensive master plan of River Islands at Lathrop as a result of the increased loads expected with the proposed Phase 2 densification/intensification of both residential and non-residential land uses. Based on the latest programming,the overall requirements of the project are as follows; • 15,010 residential units 0 5,381,022 square feet of aggregate office, commercial, and retail space. Utilizing historical and published utility data, Power Systems Design (PSD) has determined that the loads anticipated at full build out of the project appear to be adequate. This adequacy is not does not include reduction of load based on existing or anticipated photovoltaic contributions to the electric distribution system. Such reductions are likely, since recent State building code updates now mandate solar panels on new single family homes. To summarize electrical demand: PSD has estimated the residential component load to be about 45MVA design. PSD has estimated the office, commercial and retail component load to be about 38MVA design(based on two methods of load estimation;municipal and public utility algorithms utilized by Modesto Irrigation District and Pacific Gas and Electric. Total electric demand for the master plan has been estimated by PSD to be about 83MVA design. Existing and proposed master plan electrical substation infrastructure (constructed in 2014 through 2016) includes space to accommodate three (3) 115kV/2lkV transformers; which will provide adequate capacity for the ultimate build out. Nine (9) 2lkV distribution feeders (aggregate rating in excess of the substation transformer bank capacity) are planned to accommodate the ultimate development. PSD has determined that the electric distribution system capability is adequate for the latest programming. 115kV line (constructed 2015) capacity based on conductor rating is about 112 MVA and will support the proposed ultimate build out of the development. Please note that the above demands are based on design, actual use will be less than the design values.