District Construction

Salt air hills project -

The Midway Sewer District and the Highline Water District intend to replace much of their facilities in the Salt Air Hills area. Click <here> for a map of the area.

The Midway Sewer District intends to replace approximately 56 manholes, 10,190 lineal feet of sewer main, 4,685 lineal feet of side sewer among other items. The Highline Water District is planning on replacing 12,150 lineal feet of water main ranging in size from 4” to 12” diameter. When the pipes are in the ground the streets will be repaved. Much of the funding for the sewer portion of this project is coming from a Public Works Trust Fund loan, with very favorable terms.

This project was advertised in December of 2008 and the bid opening is set for January 22, 2009. Both Districts look forward to a successful project that will provide the public we serve with quality valuable assets for many years to come.

small works project 2008a - 32nd avenue south & 192nd street -

The Midway Sewer District has discovered several cracked tees and other defects in the sewer on 32^nd Ave. S., north of S. 192^nd Street. Click <here> for a map of the area.

We decided to entirely replace about 800 lineal feet of 8” sewer main and about 500 feet of 6” lateral sewer (sewer stubs) to completely eliminate all of the defects. We advertised this construction project and Pivetta Bros. Construction was the lowest bidder.

The District has awarded the construction contract to Pivetta Bros. Construction, and expect that they will begin construction in early 2009.

Click <here> for the bid tabulation from the bid opening.

submarine outfall project - Thank you to the community

After years of planning and study, the Midway Sewer District completed the last portion of its new outfall in December, 2007.

We would like to thank the community, the Des Moines Marina, and the Parks Department for all their patience and cooperation.

Use of the new outfall will free up the old outfall for the benefit of Des Moines Creek, preventing flooding and erosion.

Why did we do this....

The new outfall was needed to prevent treated effluent from overflowing into Des Moines Creek during major storm events and to accommodate increasing demand.

Once construction of the new outfall was complete, the District allowed the Des Moines Creek Basin Committee to use the old outfall. They plan to use that pipeline as a creek high flow bypass to remove some of the peak flow from the Des Moines Creek and thereby help prevent flooding, erosion and damage to the stream bed environment.

For more information on the joint efforts of Midway Sewer District and the Des Moines Creek Basin Committee, please see the May 3, 2007 press release.

Read an article from King County Executive Ron Sims regarding the Des Moines Creek Basin Committee and their project from March 2004.

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Overview photo of Submarine Outfall Project