East Side Treatment Plant Outfall Replacement

Project Status (Updated January 24, 2018)

Design of this project is in the last stages. Advertisement for bids is currently scheduled the end of March with construction beginning in June. The work is anticipated to be complete by November 2018.

Project Overview

The ESTP provides treatment of combined sewerage in East Bremerton during heavy rainfall events. The outfall for the plant discharges to the Port Washington Narrows immediately east of Lions Park. The existing outfall is approximately 450 feet in length and consists of 20” cast iron pipe and a 36” concrete diffuser pipe. The pipe is undersized and partially filled with gravel. A video inspection performed in 2017 indicated that sediment and rock have significantly filled the diffuser section, which reduces the hydraulic capacity of the outfall. Because of the reduced capacity, flow backs up in the outfall pipe during extreme weather events, which limits the discharge capacity of the ESTP.  

The work includes approximately 500 feet of in-water work, including 250 feet of reinforced concrete pipe installation, removal of the existing multi-port diffuser, and installation of a new single-port diffuser. Replacing only the necessary sections of the outfall saves the City a substantial amount of money compared to constructing an entirely new outfall.

Murraysmith, Inc. was selected by the City in October 2016 to design a new outfall for the facility. The new outfall will ensure proper discharge of treated combined sewer overflow events from the ESTP to the Puget Sound during heavy weather.  


The overall budget for this project is $1,775,000 including design, construction, etc.


This project is currently in the design stage. Bidding for construction of this project is anticipated in April 2018. Construction is currently scheduled from June through December 2018.
ESTP Outfall Alignment
ESTP Outfall Beach
ESTP Outfall Under Water