US Army Corps of Engineers
Omaha District

L575 Levee Restoration Information - UPDATED 5/17/19

 Click on Map to Zoom.

  

Relative to what National Weather Service gauge location:
  • Missouri River at Nebraska City and Nishnabotna River at Hamburg.
Background:
  • Levee was overtopped/breached on or before 19 Mar 2019. 
  • There are 7 breaches identified in the L575 levee system (see map).
Current actions:
  • Initial closure at breach L575_A_I to return river to the channel.  L575_A_I contract awarded 14 Apr 2019, expected completion 14 June 2019.
  • Initial closure at breach L575_B_I to return river to the channel.  L575_B_I contract awarded 19 Apr 2019, expected completion 19 June 2019.  
Cost:
  • L575_A_I $7.5 million 
  • L575_B_I $12 million
Contractor:
  • L575_A_I Western Contracting Corp., Sioux City, Iowa 
  • L575_B_I Newt Maritime Services, Dubuque, Iowa
Risk to normal Spring Runoff operations?
Yes
Risk to elevated Spring Runoff operations? 
Yes
Next Steps:
1. When river returns to channel and levees are accessible, conduct physical damage assessment. 
2. Design and construct levee restoration to authorized level of flood risk reduction. 
3. Design and construct levee restoration to authorized level of risk reduction.

L575 Levee Imagery

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)

Restoration Activities Timeline

Activity Date
Contract Bids Received (575_A_I) 9 Apr 2019
Contract Awarded (575_A_I) 14 Apr 2019
Work began (575_A_I) 4 May 2019
Initial closure at Breach (L575_A_I) Expected Completion 03 Jul 2019
   
Contract Bids Received (575_B_I) 17 Apr 2019
Contract Awarded (575_B_I) 19 Apr 2019
Work began (575_B_I) 4 May 2019
Initial closure at Breach (L575_B_I) Expected Completion 08 Jul 2019
   

Video Gallery

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Aerial view of Levee L575 Apr. 15, 2019 east of Nebraska City Airport
U.S. Army Corps of Engineers, Omaha District
April 15, 2019 | 0:44
Aerial view of Levee L575 Apr. 15, 2019 east of Nebraska City Airport, following the March 2019 unregulated runoff event. (Video by Mike Glasch, Omaha District PAO)
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NOAA River Level Observations & Forecasts

NOAA Water Gauge Levels