04-02-15 BPU RPT 10 - Laserfiche WebLink

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W A 'C k R E N f k 4ri 'Y 1_ S S f( RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L .I C U I :I: L .I.. .I I E S BOARD OF PUBLIC UTILITIES DATE: APRIL 2, 2015 ITEM NO: 10 SUBJECT: CONSTRUCTION OF THE LA SIERRA PRESSURE REDUCING STATION REPLACEMENT PROJECT—WORK ORDER NO. 1508407 ISSUE: The item for Board of Public Utilities consideration is approval of the capital expenditure in the amount of $325,500 to construct the La Sierra Pressure Reducing Station Replacement Project. RECOMMENDATION: That the Board of Public Utilities approve the capital expenditure of $325,500 for Work Order No. 1508407, which includes all design, construction, paving, contract administration, inspection and construction contingency costs for the La Sierra Pressure Reducing Station Replacement Project. BACKGROUND: The La Sierra Pressure Reducing Station (PRS) was constructed in 1986 to serve the 925 pressure zone. It currently is used as a back-up for similar stations at Magnolia and Polk. This PRS has suffered significant corrosion damage and is undersized for current zone demands. This PRS needs to be replaced and upsized to ensure that reliable and uninterrupted service can be provided to customers within the 925 pressure zone. A short section of 8-inch pipeline in La Sierra Avenue also needs to be upsized to 12-inches to enable the station to work at its maximum capacity. The work will generally entail the construction of approximately 170 linear feet of 12-inch ductile iron pipe, installing one 6-inch and one 8-inch pressure reducing valve in an underground vault, along with all necessary fittings and appurtenances, abandoning the existing PRS, and restoring sidewalk and street to original condition. The work identified will be constructed by the Water Division's field forces. This project is not expected to disrupt service to Riverside Public Utilities (RPU)water customers. The existing La Sierra PRS is located near the boundary between the City of Riverside and the County of Riverside (County). Staff has coordinated with the County regarding the necessary encroachment permits. Once the new water pipelines are installed, RPU will be responsible for standard trench repaving per the Public Works Department (PW) and County standards. Given the relatively small size of this project, PW's paving crew will perform the trench resurfacing following pipe installation. If the work schedule of PW crews is not able to accommodate the pavement work soon after the pipeline installation, staff will solicit paving bids for resurfacing the trench area from RPU's Paving Contractor Panel. A budgetary estimate for the paving work has been included in this authorization. Staff has coordinated with PW regarding the allowable working hours and timing for the project. The work is scheduled to occur during normal daytime hours during summer break to minimize disruptions to the nearby Arizona Middle School.