Phase 1 PRV Replacement- Construction
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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PRV replacement locations are: 7549 SE 29th St, 2835 82nd Ave SE, 4110 78th Ave SE, 4753 Fernridge Ln
Background
The City currently operates 85 pressure-reducing valve (PRV) stations to supply water to the Island. Previous investigations by the City showed that approximately 25 percent of the existing PRVs are in poor condition and many others have operational issues and deficiencies.
Description
An assessment of the 20 poorest conditionPRV stations within the system was completed in 2021. It included a visual condition assessment and analysis to rank and prioritize them for replacement or upgrade in the coming years. Through the assessment, the five highest risk stations were selected and four will be replaced under this project. These stations are located at four different locations. Construction will be performed in 2024, based on the design work from www.mercerisland.gov/WU0175
Project Timeline
Construction Time-frame (Q2 2024 – Q1- 2025)
Estimated Budget
$2,025,000
Contact
George Fletcher, Senior Project Manager, 206-640-5379, George.fletcher@mercerisland.gov
Status Updates
SCHEDULED ROAD CLOSURE
Friday, October 25, 2024, from 7 am-1 pm.
This work is to excavate down, expose the water main, and tie in a new 12” Ductile Iron tee with 3 valves. Due to where the water main is located, it will take up both lanes for this duration. Detour routes and extra signage will be posted. Once the excavator is removed, the road will be opened back to one way with flaggers.
October 4, 2024
Photo: Setting PRV Vault
Fury Siteworks installed the new utility vault at 2835 82nd Ave SE which will house a new Pressure Reducing Valve station. Over the next several weeks, crews will be installing new watermain in the vicinity of the vault along with internal piping, valving, and other components within the vault. This is the second of four PRV’s being replaced under this Phase 1 contract.
September 25, 2024
Fury Siteworks is working to wrap up the first PRV Station site on 78th Avenue. They have installed the new vault and all internal piping, valving, and other components and plan to patch the road and sidewalk this week. Next week they will move to 2835 82nd Ave SE to begin work on the second PRV station replacement of the contract.
SCHEDULED ROAD CLOSURE
Thursday, October 3, 2024, from 7 am-5 pm.
A road closure may affect your driving route on Thursday October 3, 2024, from 7:00 a.m. to 5:00 p.m.
This closure is to install a concrete PRV Vault with a large crane. Pedestrian access will be allowed.
ROAD CLOSURE-DETOUR ROUTES SET UP. Access to businesses will be allowed.
Postcards will be sent to those residents in the area.
September 9, 2024
SCHEDULED WATER MAIN SHUTDOWN
Thursday, September 12, 2024, from 9 am-5 pm.
This water main shutdown is to install a bypass to install a new PRV station. Partial lane closure in the areas is expected. Flaggers will maintain one-way alternating traffic, at 4110 78th Ave SE. Mailers and door hangers distributed to the residents in the area.
A new underground vault was installed this week for a new pressure reducing valve station on 78th Avenue near West Mercer Way. Contractor crews will spend the next couple of weeks installing piping, valves, and other components inside the vault and then it will be tested and activated.
Photo: Base of PRV Vault being set
August 30, 2024
Photo: excavation on 78th Ave
Water system work is underway on 78th Avenue between SE 40th Street and West Mercer Way to excavate for a new underground vault to house a new pressure reducing valve station. The contractor is maintaining a one lane roadway during work hours and the flaggers are giving priority to school bus traffic. This roadway will be closed on Tuesday Sept 3rd for several hours so the contractor can set the new concrete vault in the ground. Morning bus traffic will be allowed through before the closure and the vault should be set before afternoon bus traffic. A detour will be in place along SE 40th Street down to West Mercer Way.
August 28, 2024
Roadway Closure with Detour Routes, Limited pedestrian access :
Tuesday, September 3rd, from 7 AM 3 PM (Scheduled work)
This work is to set up a large excavator to install the concrete PRV Vault. The time it takes to set up, install the vault and take it down will be the duration of the roadway closure. Due to low-hanging power lines, the excavator will take up both lanes for this duration—a map of the roadway closure and detour routes. Once the crane is removed, the road will be opened back up to one way with flaggers. Postcards will be sent to those residents in the area.
August 27, 2024
Scheduled water main shutdown today, Tuesday, August 27th from 9 am-5 pm. This water main shutdown is to install a bypass for the installation of a new PRV station. Partial lane closure in the areas is expected. Flaggers will maintain one-way alternating traffic, at 4110 78th Ave SE. Mailers and door hangers were distributed to the residents in the area.
July 11, 2024
Fury Siteworks is scheduled to be starting the first site by the beginning of August, once materials are on hand. This site will be 4108 78th Ave SE.
March 29, 2024
Six bids were received last week for the replacement of four Pressure Reducing Valve Stations within the water system. Staff is scheduled to bring this project to the City Council in April for contract award.
9.3.24 Traffic Plan for Detour (992 KB) 9.3.24 Detour Notification (2 MB) 10.3.24 Detour Notification (2 MB)