Phase 2 PRV Replacement
Project Status
To help keep area residents informed of our construction progress, we will post project updates to this site on a regular basis. Click here to see status updates.
Project Details/Neighborhood
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3700 block, 78th Ave; 5400 block/7000 block/7200 block, West Mercer Way
Background
Due to Mercer Island's topography, pressure reducing valves (PRVs) are required to maintain acceptable water pressure island-wide, making PRV stations an integral component to the City's water system. Like water main breaks, potential damage caused by PRV failures can be detrimental to the water system and surrounding neighborhoods. Many PRV stations on the island do not meet City standards. This project furthers goals outlined in the City's Water System Plan, ensuring necessary improvements so the City remains at the forefront in providing high-quality water service.
Description
This project will install four new PRV stations and new water main at the 3700 block of 78th Avenue and the 5400, 7000, and 7200 blocks of West Mercer Way.
Project Timeline
Planning/Design (Q2 2026)
Construction (Q3 2026 to Q1 2027)
Completed (Q2 2027)
Estimated Budget
$2,500,000
Contact
Zechariah Rodino, Utlilities Engineer, zechariah.rodino@mercerisland.gov
Status Updates
August 21, 2026
This project was advertised on August 17 and the City’s bid due date is September 14. This project replaces 5 pressure-reducing valve (PRV) stations that have reached the end of their useful life with 4 new PRV stations. These stations reduce water pressure inside the City’s water mains allowing water to be safely delivered from the reservoir to homes around the island. Construction is expected to last from October to February 2027.
April 24, 2026
The City has received the 95% design package for Phase 2 of the PRV Replacement Project and is currently reviewing the plans, specifications, and cost estimate. This project will replace five pressure-reducing valve (PRV) stations that have reached the end of their useful life. PRV stations are essential to maintaining appropriate water pressure, helping prevent main breaks and extend the life of the City’s water infrastructure.
Design is anticipated to be complete by June, with construction expected from September 2026 through February 2027.
wu0140phase2prv_map.pdf (952 KB)