Tag Archives: Anderson Creek

New bridges provide improved habitat in two Kitsap County creeks

Contractors are putting the final touches on two new bridges in Kitsap County, both of which are expected to improve the local environment.

A new bridge over the Carpenter Creek Estuary near Kingston helps to restore the upper salt marsh.
Photo; Stillwaters Environmental Center

One is a 150-foot bridge that crosses the Carpenter Creek Estuary on West Kingston Road near Kingston. The other is a 50-foot bridge that crosses Big Anderson Creek on Seabeck-Holly Road near Holly.

Among local residents, the Carpenter Creek bridge may best be known as the bridge that blocked traffic and forced a detour near Kingston for more than a year — much longer than originally planned. (Recall reporter Nathan Pilling’s story in the Kitsap Sun.) While contract issues remain in dispute, the environmental benefits are clear, according to Joleen Palmer of the nearby Stillwaters Environmental Center.

The old roadway across the estuary acted like a dam to impede flows upstream and downstream.
Photo: Stillwaters Environmental Center

Replacement of a 5-foot culvert with the bridge over the estuary has obvious benefits for salmon that must fight the current to go upstream to spawn, Joleen told me, but people may not appreciate the importance of the much-expanded salt marsh.

When the roadbed was installed nearly a century ago, it formed a dam, causing water in the stream to back up, which encouraged freshwater vegetation. The saltwater influence was greatly reduced, and critical nutrients coming downstream were deposited before they reached Puget Sound.

The new bridge will allow saltwater to come and go with the tides and for nutrients to flow out more freely. Juvenile salmon coming downstream can pause to grow and acclimate to the saltier conditions they will face.

Salt marshes, which were filled in all too often years ago, are considered highly productive, because dead organic material — detritus — from the stream and estuary feeds bacteria, insects, worms and a multitude of other tiny creatures at the base of the food web.

“Salt marshes are really detritus-based ecosystems,” Joleen said. “You have many invertebrates that eat the detritus and other decomposers. The food sources reach out into the estuary and nearshore habitat to fuel the marine food web. It is not insignificant that the area is now opened up.”

Side channels in the marsh will provide refuge for young fish to grow before they head out to sea. To varying extents, the stream, marsh and estuary are expected to support coho, chinook and chum salmon along with steelhead and cutthroat trout.

Volunteers and students have been monitoring conditions in the watershed to measure the changes taking place. The latest addition to the monitoring effort is an ongoing search for the invasive European green crab. The volunteer program, called the Crab Team, is managed by Washington Sea Grant.

“The estuary is still some distance from known populations of invasive European green crab,” writes Cindi Nevins, a North Kitsap resident who joined the team, “but if the green crabs ever do arrive at Carpenter Creek, they will find exactly the kind of space they love: salt marsh channels, marsh vegetation and quiet lagoon-like waters. Why do we think they’ll love it? Because hairy shore crabs (Hemigrapsus oregonensis) do!”

Throughout Puget Sound, Crab Team members catch and identify hundreds of thousands of crabs in marsh habitat suitable for both the natives and the invaders. The volunteers hope never to catch a green crab, but some green crabs have been found in a few places in Northern Puget Sound and the Strait of Juan de Fuca. By intensifying the trapping effort, the Crab Team hopes to eradicate the invaders, or at least keep them under control.

Cindi’s report, published in the Crab Team’s newsletter, goes on to describe the challenge of catching crabs in the Carpenter Creek marsh, which often drains completely at low tide. Because the traps must be kept submerged to be effective, the volunteers are often forced to set the traps in the evening as the tide comes in and retrieve them early the next morning before the tide goes out.

To celebrate completion of the new bridge, everyone is invited to celebrate “Estuary Restoration Day” on Saturday, June 9, from 11 a.m. to 1 p.m. at Stillwaters Environmental Center, 26059 Barber Cut Off Road, Kingston.

The program will include guided tours to the marsh, live music, food and a native plant sale. Those involved with various aspects of the project will receive special recognition.

For information and videos about the marsh, visit the Stillwaters website.

The new bridge over Big Anderson Creek near Holly is nearly twice as long as the old one.
Photo: Christopher Dunagan

The bridge over Big Anderson Creek near Holly is more of a highway-safety project than an ecosystem-restoration effort. The wooden bridge, 67 years old, was the last bridge in Kitsap County to be rated structurally deficient because of its overall poor condition. Check out the story in the Kitsap Sun by reporter Ed Friedrich.

Still, the new concrete bridge, which spans 50 feet of stream, is nearly twice as long as the old bridge. That will allow the stream to meander more naturally and at a rate that sandbars can form nearby. At high flows, the stream won’t be squeezed as much through the space under the bridge.

The old wooden bridge over Big Anderson Creek was rated structurally deficient by inspectors.
Photo: Kitsap County Public Works

By the way, the official name of the stream is “Anderson Creek,” allowing confusion with two other streams named “Anderson” in Kitsap County alone. I prefer to call it “Big Anderson,” in conformance to tradition by area residents and local institutions. For a further explanation of the issue, read Water Ways, June 22, 2017.

A trick question: Can you locate Anderson Creek?

Let’s talk about Anderson Creek in Kitsap County. Where exactly is that stream?

If you were to say that Anderson Creek is a stream that spills into Hood Canal near Holly, you would be right.

Artist rendering of future bridge on Seabeck-Holly Road. // Photo: Kitsap County

If you are thinking of another Hood Canal stream — the one that you cross north of Seabeck while traveling on Anderson Hill Road — that would be right, too.

And nobody could complain if you believe that Anderson Creek is the name of the stream that flows into Sinclair Inlet near Gorst.

Officially, they are all Anderson Creek, according to the Geographic Names Information System, the official database of true names. GNIS is maintained by the U.S. Geological Survey.

I discovered the existence of three Anderson Creeks in Kitsap County as I sat down to blog about a new bridge project being planned on Seabeck-Holly Road north of Holly — over a stream I have always called Big Anderson Creek.

These are the opening lines of the county’s announcement about the bridge work: “Kitsap County Public Works begins construction of a new bridge on Seabeck-Holly Road at the Anderson Creek crossing beginning July 18, 2017.”

I immediately thought that someone in Public Works must have accidentally shortened the name from Big Anderson Creek to Anderson Creek, but I guess I was wrong. I mean, doesn’t everyone call it Big Anderson Creek?

I conducted an online search for “Big Anderson Creek” in Kitsap. Many reliable sources have been calling it Big Anderson Creek in dozens of documents for at least several decades. To name a few of the agencies using the “wrong” name:

  • Hood Canal Coordinating Council in its “Summer Chum Salmon Recovery Plan,”
  • Kitsap Public Health District in its annual “Water Quality Monitoring Report,”
  • Kitsap Public Utility District in its water supply assessment,
  • Kitsap County Department of Emergency Management in its multi-hazard-mitigation plan,
  • Washington Department of Ecology in its inventory of stream-monitoring programs,
  • Point No Point Treaty Council in its nearshore habitat assessment for Hood Canal,
  • Hood Canal Salmon Enhancement Group in its annual report of restoration projects,
  • The Trust for Public Land in its “Assessment for Freshwater Habitat for Puget Sound Salmon,”
  • And, last but not least, Big Anderson Creek is the name used by Kitsap County Public Works in its stream-monitoring program.

Little Anderson Creek, the one farther north, is in the same boat as Big Anderson Creek. A lot of people use the descriptive “Big” and “Little” when talking about the two streams, but officially they are wrong, according to my assessment.

Ed Smith, Public Works project manager for the bridge construction, told me that he will keep calling it “Anderson Creek.” That’s the official name on the maps that he uses. It is also the name listed on the “hydraulic project approval” issued by the Washington Department of Fish and Wildlife to authorize construction.

Through the years, I’ve written quite a lot about confusing and conflicting names, but I never had a clue about the discrepancy involving Big and Little Anderson creeks. If someone reading this has the time and dedication to officially change the names of these two streams, I don’t think anyone would object. The process begins with an application to the Washington State Committee on Geographic Names. The committee’s coordinator, Caleb Maki, can help people work their way through the process. Please let me know if you tackle this project.

Meanwhile, I will continue using the popular nomenclature of Big and Little Anderson creeks.

As for the new bridge over Big Anderson Creek, a 50-foot concrete structure will replace the aging 29-foot timber bridge built in 1950. The opening for the stream will increase from about 28 feet to about 45 feet, Smith said. That will give the stream slightly more room to shift around during heavy flows.

Work will begin July 18 and wrap up around December, according to the schedule. Seabeck-Holly Road, the main route to and from Holly, will be reduced to one lane during the construction.

The $1.67-million construction project will be carried out by Pacific Pile and Marine of Seattle. An artist’s rendering of the completed structure and other information can be seen on the Kitsap County website titled “Seabeck-Holly Road Bridge #20 at Anderson Creek.”