Harper Estuary project nears fall construction; bridge to come later

A new Harper Estuary bridge is being planned with a trail to the water. Graphic: Kitsap County Public Works
A new Harper Estuary bridge is being planned with a trail to the water. // Graphic: Kitsap County Public Works

The Harper Estuary restoration project is finally coming together, with one contractor being hired for culvert removal, others bidding for the excavation work and engineers completing the designs for a new bridge.

Since June, the first phase of the project has been divided into two parts. The first actual construction will involve the replacement of a 24-inch culvert that carries Harper Creek under Southworth Drive. The new structure will be a three-sided, open-bottom culvert that spans 16 feet across the stream.

A larger culvert will carry Harper Creek under Southworth Drive. Graphic: Kitsap County Public Works
A larger culvert will carry Harper Creek under Southworth Drive. (Click to enlarge.)
Graphic: Kitsap County Public Works

Bids were opened, and a contractor has been preliminarily selected, said Doris Small, project coordinator for the Washington Department of Fish and Wildlife. A meeting has been scheduled for Tuesday to iron out the final details and award the contract, she said.

The work must be completed by Oct. 15, so things will progress rapidly, she said. An announcement will be made soon regarding a temporary detour on Southworth Drive.

The remainder of the first phase involves the excavation of dirt and other debris used to fill in the estuary years ago. The project has been reduced slightly in size from the original design, reducing water contact in certain spots, Doris told me. Also, an analysis of the soils to be removed concluded that some of the fill material is contaminated at such a low level that it can be used as fill elsewhere or sent to a composting facility.

Olympiad Drive crosses Harper Estuary. Photo: Kitsap County Public Works
Olympiad Drive crosses Harper Estuary.
Photo: Kitsap County Public Works

Bids will be taken on the excavation project until Sept. 13, and the work must be done before the middle of February.

The design of a new 120-foot-long bridge on Olympiad Drive is between 60 and 90 percent complete. Applications have been submitted for several grants to complete the project, primarily construction of the new bridge. The bridge will replace a 36-inch culvert where the road crosses the estuary. The design includes access for people to walk down to the water, and it can be used to launch small hand-carried boats.

As I described in Water Ways in June, the existing makeshift boat launch must be removed to allow the restored estuary to function properly. I am told, however, that county officials are still looking for a nearby site to build a new boat launch with access for trailered boats.

If grants are approved to cover the cost, the bridge could be under construction next summer, Doris said. The total estimated cost of the entire restoration is now $7 million, with $4.1 million approved from a mitigation fund related to contamination from the Asarco smelter in Tacoma.

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2 thoughts on “Harper Estuary project nears fall construction; bridge to come later

  1. I am in general a big fan of these projects, but I wonder in this case if the option of simply removing the road was ever considered? This bridge seems like overkill for the number of homes in the neighborhood there. Not quite a bridge to nowhere, but quite an expensive construction for a road which in years past has often had a dog sleeping in the middle of it.

    1. As I recall, the Washington Department of Fish and Wildlife preferred to remove the causeway entirely to restore the estuary to its greatest extent. Residents of the area did not want to lose the road, and Kitsap County ultimately supported their position. One major argument for maintaining that access is to provide an alternate route for people and emergency vehicles if the only other access into the neighborhood were to be blocked.

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