04-27-2020 BPU RPT 05 - Laserfiche WebLink

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W A T E R E N E R G Y L I F E pr� RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L I C U T I L I T I E S BOARD OF PUBLIC UTILITIES DATE: APRIL 27, 2020 ITEM NO: 5 SUBJECT: SUPPLEMENTAL AGREEMENT WITH GEOSCEICNE SUPPORT SERVICES, INC. IN RESPONSE TO REQUEST FOR PROPOSAL 2000 FOR THE BUNKER HILL WELL SITING AND REPLACEMENT STUDY IN AN AMOUNT NOT TO EXCEED $130,714 ISSUE: Approve a Supplemental Agreement in response to Request for Proposal 2000 for the Bunker Hill Well Siting and Replacement Study with Geoscience Support Services, Inc. of La Verne, California, in an amount not to exceed $130,714. RECOMMENDATIONS: That the Board of Public Utilities: 1. Approve a Supplemental Agreement in response to Request for Proposal 2000 for the Bunker Hill Well Siting and Replacement Study with Geosciences Support Services, Inc. of La Verne, California, in an amount not to exceed $130,714; and 2. Authorize the City Manager, or designee, to execute a Supplemental Agreement with Geosciences Support Services, Inc., including making minor and non -substantive changes and to sign all documents and instruments necessary to complete the transactions. BACKGROUND: The City of Riverside Public Utilities Department (RPU) delivers potable water to nearly 67,000 service connections, providing water to over 311,000 people in the community. RPU's water supply consists of groundwater produced from approximately 50 groundwater production wells located within the Bunker Hill, Rialto -Colton, and Riverside basins, with 2/3ras of its supply originating from the Bunker Hill Basin. RPU continually evaluates and manages its water supply infrastructure to ensure its groundwater wells are performing effectively to meet summer peak demands and to exercise the City's water production entitlement rights as defined in the 1969 Western -San Bernardino Judgment. The average age of an RPU well is approximately 55 years old, with the oldest active production well being 97 years old. RPU utilizes a groundwater well until the asset is no longer effective in extracting water for its intended purpose. Once a well can no longer be used or is unable to meet its need, an evaluation occurs to identify future needs and where and how to replace the well being taken out of service. Many factors go into replacing a well such as the anticipated pumping volume, impacts to adjacent wells within a well field, location to hazards and utilities, prior agreements and water rights, geology, formation depth, anthropogenic impacts, and water quality. Understanding these factors is critical given that drilling and construction costs for a new well often exceed $3 million dollars.