This project consists of site preparation, removal of the existing drawdownpipe and concrete spillway, construcation of groundwater drains, a 72-inch diameter reinforced concrete piincipal spillwau pipe, a reinforced concrete drop inlet structure, a reinforced concrete impact basin outlet strucure, a gated 36-inch reinforced concrete drawdown pipe, earth grading, placement of riprap and other erosion control features and incidental work as required by the drawings, specifications, the DNR Inspector and/or the Construction Representative.