11 July 2019 – Hydraulic placement of sand continues to widen the sand berm pad at the first priority breach location. Dredging operations also continue at the second priority breach location with the initial breach closure anticipated for mid-July. A follow-on contract to raise and widen both initial breach repairs has been awarded. This work is set to begin on the first breach location in the upcoming few weeks.
20 June 2019 – For the breach west of Thurman, IA, the priority breach was initially closed on 20 June 2019. This closure stops inflows through the breach and will allow for follow-on construction activities to further increase the level of flood risk management provided by the repaired levee section.
For the breach West of Hamburg, IA, the rock revetment is approximately 40% complete. Two additional tugs have been contracted to help haul shot rock from the quarry, which should help speed up the revetment schedule. Once, the rock revetment has been repaired the contractor will be able to resume directing dredge material into the initial breach closure footprint.
10 June 2019 – For the breach west of Thurman, IA, the contractor resumed dredging operations on 03 June 2019 following the late high water event. Material placed prior to the recent (29 May 2019) high water event largely remained in place with minimal erosion observed.
For the breach West of Hamburg, IA, a contract modification was executed on 3 June 2019 to procure and place rock in a revetment alignment along the Missouri river to reduce flow velocity through the breach. The first rock placement in the revetment occurred on 3 June 2019. Both 18” dredges are also currently placing material to minimize material loss from the high water levels.