Corps Repairing Union Slough Levee

Repairs to the Union Slough Levee started in earnest yesterday as the U.S. Army Corps of Engineers officials commenced construction on a 100-foot-long damaged segment on the southwest corner of Smith Island, just south of Everett’s Water Pollution Control Facility.

Located on the Snohomish River’s right bank, the $86,000 project will address sloughing, slope scour, and the loss of embankment material caused during high river flows in November 2014.

Damages reduced the levee’s flood defense to a five-year level of protection, or a 20 percent chance of occurring in any given year.

Once repaired, the levee will be restored to a 20-year level of protection, or a five percent chance of occurrence. Under a cost-share agreement, the Corps pays for 80 percent of construction costs and Snohomish County Diking District #5 picks up the remaining 20 percent.

Repairs to the segment include rebuilding erosion protection along the 100-foot damaged section with an additional 25 feet on both sides for tie-in purposes, regrading the levee slope to make it more gradual on the riverward side, and adding a blanket of rock armor to protect against erosive river flows.

The construction plan calls for the reuse of existing spall rock and riprap for the repair, meaning a minimal need for new materials.

Construction is expected to be complete by the end of September, restoring the levee to its designed 20-year level of flood protection.

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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