Oyster Bay Beach Sewer Upgrades

Project Status (Updated February 27, 2019)

The City will begin consultant selection in March 2019. Design is anticipated to start in May 2019

Project Overview

The primary sewage conveyance piping within the Oyster Bay sewer basin consists of pressure gravity sewer mains installed within the beaches of Oyster and Ostrich Bay (referred to throughout as beach mains). A series of pump stations in the sewer basin convey flow through the beach mains to a larger pump station (OB-1) which pumps sewage to the wastewater treatment plant. Many of the residences and commercial properties within the basin discharge to the beach mains. In the past, sewer overflows have been reported at properties during periods of high sewage flow. The suspected cause of the overflows is sewage flow in the beach mains surcharging up to the elevation of the properties during the heavy rain events. 

The proposed project will eliminate the gravity sewer main on the beach, which has approximately 53 residential/commercial sewer lateral connections. Grinder pumps will be installed on the upland properties and convey flow to the upland sewer system. Some of the project benefits include pollution reduction by reducing sewer overflows into Oyster Bay, reducing sewer infrastructure in a marine environment, and eliminating problematic maintenance access.

Budget and Funding

The estimated project cost is $3,770,000. The City has obtained a loan for $3,800,000 from the Department of Ecology Clean Water State Revolving Fund loan program to fund both design and construction. 

This Project has been funded wholly or in part by the United States Environmental Protection Agency under an assistance agreement to the Washington State Department of Ecology. The contents of this document do not necessarily reflect the views and policies of the Environmental Agency, nor does the mention of trade names or commercial products constitute endorsement or recommendation for use.


Generally, the project design will start in early to mid-2019 and be completed within 12 months. Construction will occur in 2021.

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