Red Rock Dam Roadway Closure Extended

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KNOXVILLE, Iowa –The U.S. Army Corps of Engineers, Rock Island District, has extended the full closure of Highway T15 across Red Rock Dam until 3 p.m. on June 30, pending a successful strength test for the recently placed concrete. The road closure is necessary to allow for proper concrete curing and installation of a roadway hatch on the newly repaired bridge deck.

A single-lane road closure to Highway T15 across the Red Rock Dam will begin July 6. It is anticipated that single-lane closures will only be in effect Monday through Friday each week with the road fully open to traffic on the weekends.

Starting July 12, a full road closure over Red Rock Dam is scheduled and will last through approximately July 14. During that time a detour will be in place. Additional partial and full road closures may be needed through 2024 for rehabilitation projects on the dam.

For more information, please contact the US Army Corps of Engineers at Lake Red Rock at 641-828-7522 or via email at

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