US Army Corps of Engineers
Omaha District

L550 Levee Restoration Information

Background: The L550-561 Missouri River Left Bank 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 impacting the I-29 corridor have been identified for initial repairs.  The construction contract for these two breach repairs was awarded on 11 June 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.

Restoration Activities:

 

Full Repair Contract 

Contractor

Weston Solutions, Inc. from West Chester, PA

Contract Amount

$22.1M

Contract Award

June 11, 2019

  Construction Start

July 8, 2019

Estimated Completion

100 days from start of construction

 

 

 

 

 

 

 

 

Next Steps:

  1. Provide an interim level of flood risk management at the two priority 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 Update:

08 November 2019 - The team continues to conduct resiliency and interim repairs throughout the L-550 levee system. These repair efforts are mainly focused on enhancing the initial breach repairs.

24 October 2019 - The team continues to conduct resiliency and interim repairs throughout the L-550 levee system. These repair efforts are mainly focused on enhancing the initial breach repairs.

13 October 2019 - The contractor continues resiliency efforts to protect the sand berms from impending weather.  The contractor is also working to develop an access road to the next breach location.

27 September 2019 – The southern inlet breach was closed on 12 September 2019. The current scope of work for the interim repair project is 75% complete. Measures are being taken to protect the sand berms from next week's forecasted rise in river levels.

13 September 2019 – The contractor has now closed both priority breaches on the L-550 system and is working to expand these repair areas to increase the level of flood risk management provided by the repaired levee system.  It is estimated that the contractor is approximately 70% complete with the interim repair contract, although additional efforts may be added to this contract at a later date.

06 September 2019 – The contractor continues to work on closing the south inlet breach and is still on track to have this effort done by mid-September.  At the same time the Contractor is also working on expanding and improving the initial breach repair on the north inlet breach, working towards bringing the level of flood risk management provided by these repairs to the 25-yr level of protection.  It is anticipated that these follow-on repairs at the north breach will also be done by mid-September.

29 August 2019 – The 1000-foot north breach was closed on 24 August 2019. This initial closure stops the inflow of water and allows for follow-on construction activities to include increasing the level of flood risk management to the 25-yr level for this section of the levee until the system can be fully rehabilitated. On 19 August 2019, the contractor ferried vehicles across the north breach to begin work on the south breach. It is anticipated the south breach will be closed by 14 September 2019.

23 August 2019 – To date, the contractor has placed roughly 400,000 cubic yards of material in the area of the north breach. Closure of this breach is anticipated around 26 August 2019. The contractor has also started hauling sand to begin closure of the south breach. It is anticipated the south breach will be closed by 14 September 2019.

13 August 2019 – The breach could not be closed due to increased flows as the gap size decreased. To date, the Contractor has placed over 375,000 CY in the north breach closure alignment. Swamp buggy excavators have completed a rough haul road from the south borrow site to the south breach location. A revetment is being constructed to facilitate the breach closure.

31 July 2019 – The contractor continues to work towards closure of the northern breach. To date, the Contractor has placed over 220,000 CY in the north breach closure alignment. Roughly 1650 LF of the required 1800 LF north breach closure alignment is in place. North breach is scheduled to close within the week. Swamp buggy excavators have mobilized to the south breach to begin haul road construction.

22 July 2019 – The contractor continues to work towards closing the northern breach. The contractor was able to complete approximately 33% of the North breach closure and advanced the sand closure berm over 50%. Work on the south breach will likely begin this weekend, but is subject to closing the north breach and letting the land behind the south breach dry out.

08 July 2019 – All equipment and materials for the initial breach repair contract are on site and assembled, and dredging operations are underway.

20 June 2019 – The contractor is anticipated to mobilize to the construction site later this week and begin dredging operations towards the end of the week of 24-28 June.

11 June 2019 – The initial breach repair contract for both priority breaches was awarded to Weston Solution, Inc. of West Chester, PA on 11 June 2019.

NOAA River Level Observations & Forecasts

NOAA Water Gauge Levels

L550 Levee Imagery

Aerial view of work on L-550 Sep. 13, 2019
After nearly 45 days, USACE contractors close the north breach of Levee L550 Mar. 24, 2019.
Image of final length of the north breach on Levee L550 near Watson, Missouri moments before closing, Aug. 24, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
Aerial view showing progress of USACE contractors performing work on Levee L550 Aug. 3, 2019.
USACE contractor working to move material and close the northern breach on levee L-550 July 31, 2019.
Aerial view of levee L550 as of June, 11, 2019.
Aerial view of levee L550 as of June, 11, 2019.
Photo shows levee L550 breach effects near Watson, Missouri Mar. 14, 2019 (Photo by USACE, Omaha District)

Video Gallery

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Col. John Hudson provides update on Levee L550 Aug. 23, 2019
U.S. Army Corps of Engineers, Omaha District
Aug. 23, 2019 | 0:58
Col. John Hudson, Commander USACE Omaha District provides an update on Levee L550 Aug. 23, 2019.
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