12-14-2020 BPU RPT 02 - Laserfiche WebLink

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W A T E R E N E R G Y L I F E P U B L I C U T I L I T I E S RIVERSIDE PUBLIC UTILITIES BOARD OF PUBLIC UTILITIES SUBJECT: PLAZA SUBSTATION 445 — WORK ORDER OF $4,450,000 ISSUE: Board Memorandum DATE: DECEMBER 14, 2020 ITEM NO: 2 4kV TO 12kV MAKE-READY FOR CIRCUITS 444 AND NO. 1904777 FOR A TOTAL CAPITAL EXPENDITURE Consider the approval of Work Order No. 1904777 for a total capital expenditure of $4,450,000 for the Plaza Substation Make -Ready for Circuits 444 and 445 Project. RECOMMENDATION: That the Board of Public Utilities approve Work Order No. 1904777 for a total capital expenditure of $4,450,000 for the Plaza Substation 4kV to 12kV Make -Ready for Circuits 444 and 445 Project. BACKGROUND: The Electric System Master Plan (ESMP) recommends the conversion of all remaining 4kV distribution circuits to 12kV to improve system capacity and reliability. The work contemplated in Work Order No. 1904777 focuses on overhead facilities. In preparation for the upcoming voltage conversion of Circuits 444 and 445 out of Plaza Substation, the replacement of existing deteriorated poles and aging infrastructure is required to make the circuits ready for future conversion work. The aging infrastructure includes facilities such as overhead wires, insulators, cross -arms, transformers, and other associated electrical distribution facilities that have outlived their useful life. A separate project to convert and upgrade the existing 4kV electrical distribution system to a 12kV system is currently under design and is not part of Work Order 1904777 considered here. That design will include plans and specifications for the installation of underground facilities, including vaults, trenching, conduits and street paving. These underground civil facilities are required to complete the 4kV to 12kV voltage conversion. Staff will return to the Board of Public Utilities to seek approval to award a contract to construct civil work and associated electrical facilities at later time, after the design and contract bid documents are complete.