Construction of Yakima River Setback Levee Progresses Well (USA)

Construction of Yakima River Setback Levee Progresses Well.

The Yakima River levee system is bustling with activity these days as the U.S. Army Corps of Engineers works to construct a setback levee measuring nearly 3,900 linear feet on the left bank of the Yakima River near Sportsman State Park.

Construction commenced Monday on the approximately $2.9 million federally-funded project which is expected to be complete by early February.

High flows during a May 2011 flood event damaged approximately 500 feet of the Yakima Authorized Levee at Sportsman Park and reduced flood defense to a 2-year flood protection level. While a plan to repair and restore the damaged levee to its original condition was considered, it was ruled out. Repairing the levee to restore flood protection prior to the spring flood season, would have required in-water work outside of the fish window, potentially harming or harassing Endangered Species Act listed fish. By setting back the levee, flood protection could be restored with only out-of-water construction.

Working closely with Yakima County, the Corps developed the setback design alternative which would minimize environmental impacts and was in-line with the County’s long term, basin-wide realignment plan, according to Brian Nelson, Yakima Authorized Levee Rehabilitation project manager for the Army Corps of Engineers, Seattle District.

The setback segment will start upstream of West Birchfield Road and extend downstream to the Washington State Highway 24 bridge abutment. Riprap armor protection on the setback levee will extend up to the 100-year flood protection level and the levee crown will provide an additional three feet of freeboard height.

The downstream end of the existing levee will be removed to ground level, to include removing 200 linear feet from the center line of the old State Route 24 bridge approach. In order for the setback levee to function correctly within the Yakima River levee system, the remainder of the old bridge embankment will be armored with a four-foot-thick blanket of riprap.

The project will reconnect 20 acres of floodplain at the setback site, providing an opportunity for high flow events to establish side channels and natural depressions that will increase flood storage, limit hardened banks along the river, improve riparian corridors, and increase habitat function for endangered salmonids,” Nelson said.

Throughout the planning process the Corps coordinated and worked with a number of state and federal agencies, including: Yakima County, U.S. Bureau of Reclamation, Washington State Parks and Reclamation, Washington State Department of Transportation, U.S. Fish and Wildlife, Washington Department of Fish and Wildlife, Washington Department of Ecology, and the National Marine Fisheries Service.

Dredging Today Staff, January 13, 2012; Image: usace

Share this article

Follow Dredging Today

2 thoughts on “Construction of Yakima River Setback Levee Progresses Well (USA)”

Comments are closed.

Events>

<< Aug 2015 >>
MTWTFSS
27 28 29 30 31 1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31 1 2 3 4 5 6

TIPC to Host 102nd APP Annual Conference

102nd Conference will offer a productive exchange of new technologies, knowledge, and management experience and continue to foster closer…

read more >

StormCon

Now entering its 14th year and serving a global audience StormCon is the premier event for stormwater pollution prevention and surface…

read more >

Coastal Engineering Asia

WHY YOU CANNOT MISS THIS EVENT

Join Trueventus Coastal Engineering Asia, a truly International platform presenting dynamic technical discussion on the present-day coastal engineering challenges. Topics namely on marine clay, dredge materials, flood mitigation and effective use of soil compression are of the many interesting topics presented.  Join us on this 2 days journey in defining coastal engineering well into the modern engineering history at the beautiful shores of Asia- Singapore!

KEY FEATURES OF THIS CONFERENCE

  • Hearing from the successful coastal projects
  • Gauging the key benefits of using soil compression method to strengthen soil
  • Mastering effective and cost-saving excavation and sediment disposal methods
  • Learning new innovations, techniques and technologies in marine structure engineering and construction
  • Exploring the advances in the field of design and construction of coastal structures

 More info

read more >

HYPACK Seminar – Cartagena, Colombia (Spanish)

This course will be taught in Spanish. The 3-day training seminar will cover all the aspects of single beam and multibeam hydrographic…

read more >

Jobs>

Hydrographic Surveyor

Gahagan & Bryant Associates, Inc. (GBA) is posting the following career opportunity in their Houston, TX and Baltimore, MD and Tampa, FL offices....

apply

Senior Engineer

Gahagan & Bryant Associates, Inc. (GBA) is posting the following career opportunity in their Houston, TX and Baltimore, MD and Tampa, FL offices...

apply