US Army Corps of Engineers
Omaha District

L575 Levee Restoration Information

Background: The L575 Benton-Washington-McKissock-Buchanan-Atchison-Hamburg Levee System experienced significant damage during the 2019 Flood Event. This led to seven (7) breaches, along with substantial other damages, occurring throughout the Levee System.

Current Action: Two priority breaches that are impacting the I-29 corridor have been identified for initial repairs. These two construction contracts were awarded on 14 and 19 Apr 2019.  These initial repairs are directed at stopping the flow from the Missouri River into the area behind the levee system and providing an incremental level of flood risk management. Follow-on actions to further repair the levee system and provide additional flood risk management are being coordinated within the PL 84-99 program. 

 

Initial Breach Repair #1 – West of Thurman, IA

Initial Breach Repair #2 – West of Hamburg, IA

Follow-on Interim Repairs at Breach Locations 1 & 2

Contractor

Western Contracting Corp. from Sioux City, IA

Newt Maritime Services from Dubuque, IA

Weston Solutions, Inc. of West Chester, PA

Contract Amount

$7.5 Million

$12 Million

$2.7 Million

Contract Award

April 14, 2019

April 19, 2019

July 10, 2019

Construction Start

May 4, 2019

May 4, 2019

TBD

Estimated
Completion

July 15, 2019

August 29, 2019

TBD

 

Next Steps:

  1. Provide an interim level of flood risk management at both initial breach repair locations.
  2. Conduct physical damage assessment when water levels recede and the levees are accessible
  3. Design and construct levee rehabilitation to authorized level of flood risk management.

Status Updates:

13 Aug 2019 – The initial breach was closed on 25 July 2019. Dredging de-mobilization is tentatively scheduled for 16 August 2019. The contractor is approximately 95% complete with the scope of work.

05 Aug 2019 – Work on the second stage (interim) repairs is anticipated to begin the week of 12 Aug 2019.

31 July 2019 – Initial Breach A is substantially complete and the final inspection was held on 15 July 2019. Initial Breach B was closed on 25 July 2019. The Contractor continues to place additional material to build the sand berm to the design width and height. All work on this contract is expected to be complete in late August 2019. A field office has been setup in order to begin the interim repairs.

22 July 2019 – Initial breach repair #1 is complete and the final inspection was held on 15 July 2019. The contractor for initial breach repair #2 has almost completed the sand berm, but has experienced difficulties with the increased flows realized from decreasing the breach opening. As such, the team pursued placement of roughly 800 tons of rip rap north of the breach to stem the flow down the levee toe and into the breach. The pre-construction meeting for the follow-on repairs occurred on 18 July 2019.

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.

NOAA River Level Observations & Forecasts

NOAA Water Gauge Levels

L575 Levee Imagery

The U.S. Army Corps of Engineers, Omaha District completes an initial breach closure on levee L575 near Percival, IA June 20, 2019.
The U.S. Army Corps of Engineers, Omaha District completes an initial breach closure on levee L575 near Percival, IA June 20, 2019.
The U.S. Army Corps of Engineers, Omaha District completes an initial breach closure on levee L575 near Percival, IA June 20, 2019.
The U.S. Army Corps of Engineers, Omaha District completes an initial breach closure on levee L575 near Percival, IA June 20, 2019.
USACE contractors at work along levee L575a near Nebraska City, Nebraska May 10, 2019 following March 2019 runoff event.
USACE contractors at work along levee L575a near Nebraska City, Nebraska May 10, 2019 following March 2019 runoff event.
USACE contractors at work along levee L575a near Nebraska City, Nebraska May 10, 2019 following March 2019 runoff event.
Photo documents aerial view of overtopping levee L575 near Nebraska City, Nebraska Mar. 16, 2019, resulting from a major runoff event. (Photo by USACE, Omaha District)
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial view of levee L550 as of June, 11, 2019.
Aerial view of levee L550 as of June, 11, 2019.
The U.S. Army Corps of Engineers, Omaha District completes the initial breach closure on levee L611-614 near Sioux City, Iowa June 12, 2019. The L611-614 Levee System lies directly east of the confluence of the Platte River (River Mile 595).
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
Aerial drone footage shows USACE, Omaha District work continuing on levee L575a June 13, 2019.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
This image from June 22, 2019 shows progress of the water drainage after Levee L575a was closed on June 20.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view showing Levee 575a progress as of June 24, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 20, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 20, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 20, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 20, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 20, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 20, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of breach L575a northwest of Percival, Iowa June 28, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.
Aerial view of repair working being done at levee breach L575a_1 July 9, 2019.

Video Gallery

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Aerial view near Levee L575 at 2011 setback, Apr. 15, 2019
U.S. Army Corps of Engineers, Omaha District
April 15, 2019 | 0:30
Aerial view near Levee L575 at 2011 setback, Apr. 15, 2019, following March 2019 runoff event. (Video by Mike Glasch)
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