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Contractor open house to provide information on green stormwater project, May 6

Summary

Contractors are invited to an open house to learn about a King County green stormwater infrastructure project to reduce combined sewer overflows, or CSOs, into Puget Sound.

Story

Contractors are invited to an open house to learn about a King County green stormwater infrastructure project to reduce combined sewer overflows, or CSOs, into Puget Sound.

The information session takes place on Monday, May 6, 2013, from 1 to 3 p.m. in the King County Wastewater Treatment Division main office at 201 South Jackson Street, 5th Floor, Seattle.

The project will require construction of a series of bioretention swales within the public right-of-way on 15 city blocks in West Seattle’s Sunrise Heights and Westwood neighborhoods. The bioretention swales will divert and treat street runoff and convey it through under drains to an Underground Injection Control (UIC) well at the end of each block. Water will be released into permeable soils deep underground. 

This project’s purpose is to reduce CSOs at the Barton Pump Station next to the Fauntleroy Ferry Terminal from an average of four per year to no more than one per year on a long-term average.

The preliminary construction cost is estimated at $5.5-6 million. King County will advertise this design/bid/build project in late June with construction scheduled to begin this fall.

The County has solicited and selected independent engineering/architectural and construction management firms for this project. The project is permitted through the City of Seattle’s Street Improvement Permitting process.

It is anticipated this project will be funded in part by State Revolving Funds that may contain funds from the EPA. The Fair Share Goal is 10 percent to Minority Business Enterprise (MBE) and 6 percent to a Women Business Enterprise (WBE). 

For more information, visit the project Web page or contact Project Manager Mary Wohleb at 206-296-8028.

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