The granular-surfaced low water crossing located at the entrance of the Deception Hollow boat ramp has recently been damaged by large flows. This project will stabilize the low water crossing by installing 10’ tall sections of SKL-12 sheet piling along the downstream toe of the crossing from bank to bank (22 sections, approximately 40’), to match the approximate elevation of the low water crossing profile. Once installed, the top of the piling will be trimmed and a ¼” thick C-channel is to be stitch-welded to cap the top of the piling. The upstream side of the piling is to be backfilled gabion stone (3” to 5” gradation) meeting IDOT specification 4130.08, approximately 30 tons. The downstream side of the of piling is to have IDOT Class E Revetment placed at a 2:1 slope, approximately 15 tons. For bid package documentation, including bid proposal, please contact Heath Delzell at 515-979-0104 or heath.delzell@dnr.iowa.gov. BID CLOSING DATE AND TIME: 4/17/2025 AT 3:00 PM *Bids must be submitted as per the General Information and Instructions to Bidders
