State Highway 10 will remain closed at the Copan Dam through November 2017, according to the United States Army Corps of Engineers — Tulsa District.

A contractor is repairing the dams flood control gates and spill embankment. The repairs require the continued closure of the state highway until they are completed. A new contractor has been hired for erosion repairs.

Detailed inspection of the flood gates must be done from the top of the bridge deck and roadway. The repairs include testing of gate integrity, including weld repairs. Downstream embankment repairs will correct significant erosion that have compromised portions of the roadway and guardrail across the dam and leading up to the gate repair work area.

Lake Manager Lee Perry said the project involves four gates, and is taking longer than anticipated.

The project originally was scheduled to be completed in January.

Perry oversees the operation and maintanence of Skiatook, Birch, Copan and Hulah lakes, including the four water control structures and a levee in Caney, Kansas.

“The Tulsa District, U.S. Army Corps of Engineers, recognizes that this road closure inconveniences Copan and the surrounding communities, but it is necessary to accomplish timely repairs and ensure the safety of the public and workers,” according to a Corps press release.

State Highway 10 spans Copan Dam. It was closed on June 1 as repairs started on the dam’s gates.

McCormick Industrial Abatement Services has the contract to rehabilitate the gates.

Traffic is being detoured on Oklahoma 99, U.S. Highway 60 and U.S. Highway 75 while State Highway 10 is being repaired. Traffic needs to follow the marked detour routes.