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Board briefed on critical distribution isolation valve replacement; $256,000 estimate for valve vaults and replacements
Summary
Staff briefed the Water Resources Board on a planned project to replace two in-ground isolation valves at the water plant, presenting a budget estimate of about $256,000 and explaining the operational need to avoid full-plant shutdowns during mainline breaks.
Board members received an informational briefing on a planned replacement of two critical isolation valves on the main lines leaving the clear well at the water plant. Staff said both in-ground valve bonnets are broken, leaving the utility unable to fully isolate either the 24-inch or 36-inch line; without isolation the utility may have to shut the entire plant during certain repairs.
Staff described a proposed project to install new valves in valve vaults to allow isolation without shutting the plant. The estimated cost presented for budget purposes was $256,000; staff said that figure includes vault construction and valve replacement and that bids will be solicited next month. Staff said a typical construction window could make one line (the 24-inch) out of service for about two weeks while a temporary bypass and cut-out/replacement are performed.
Staff noted the existing valves date to the plant expansion completed in 2007 and have passed typical warranty periods. The board received the item as information and the project will return next month for formal approval and bidding.
Why it matters: Replacing the valves with accessible vaults aims to reduce operational risk by allowing line isolation for repairs without shutting down the entire plant and disrupting service.
Next steps: Staff will bring a formal request for board approval and issue a bid package; timelines depend on bid results and contractor scheduling.
