Angostura Dam Spillway Repair   5

Background
The United States Department of the Interior, Bureau of Reclamation's Missouri Basin Regional Office intends to solicit a Request for Proposal for the repair of concrete at the Angostura Dam, located approximately ten miles south of Hot Springs, South Dakota. The dam is a 967-foot-long concrete gravity structure with a 1,063-foot-long zoned earth embankment and it has several issues that need to be resolved through the project work.

Work Details
The principal components of work to be performed include removing and replacing damaged concrete on the downstream face of the spillway, improving the Angostura Dam access road, extending a temporary access road into the river channel downstream of the spillway, and removing the temporary access road from the river channel to bring back the river channel area to its natural state.

The construction constraints include limited vehicular and equipment access to the spillway, an anticipated construction window between August 15 and November 30, and restrictions on lowering the reservoir or dewatering the stilling basin during construction.

Period of Performance
The period of performance is anticipated to be approximately 585 calendar days. The contractor who receives the award is required to commence work within 10 days of receiving the Notice to Proceed. The period of performance is inclusive of receipt and acceptance of all submittals by the Bureau of Reclamation, as well as final cleanup.

Place of Performance
The construction projects will be performed at Angostura Dam, which is located approximately ten miles south of Hot Springs, South Dakota.