Reservoir 4 Cover Replacement

Reservoir 4 is an 11 million gallon in-ground reservoir located in West Bremerton. It is a critical component of the City’s water system since it is the primary distribution reservoir in West Bremerton. In 1981, the City installed a floating polyethylene cover to ensure water quality was maintained at Reservoir 4. The cover failed prematurely and was replaced in 2002 with a new cover manufactured from polypropylene, based on recommendations from a design consultant. This cover has also degraded and is currently failing. The City performed a life cycle cost analysis and determined that installing a hard cover with a 50-year lifespan would be the most cost effective long term solution for protecting Reservoir 4. The project scope includes an evaluation to select the type of new hard cover, design of the new cover, and construction support services.    

The project is currently under design by HDR. The pre-design evaluation has indicated that a steel cover would be the most cost-effective long term solution. 

This project is scheduled to advertise for bids in April 2016, with construction expected to start in June and completion in the first quarter of 2017. Construction will be phased so that Reservoir 4 is not taken off-line until after September 1, 2016. This is to avoid doing the work during high demand summer months and to avoid schedule conflict with the McKenna Falls Intake Improvements project.  
The City obtained a $2.3 million dollar low interest loan from the U.S. Environmental Protection Agency which was made available for distribution through the Washington State Drinking Water State Revolving Fund Program (DWSRF).