US Army Corps of Engineers
Omaha District

L575 Levee Restoration Information - UPDATED 5/20/19

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.
 
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 03 Jul 2019. Initial closure at breach L575_B_I to return river to the channel.  L575_B_I contract awarded 19 Apr 2019, expected completion 08 Jul 2019.


Anticipated construction start: Work started at both locations on 4 May 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. Provide an interim level of flood risk reduction at both breach locations.

2. When river returns to channel and levees are accessible, conduct physical damage assessment. 
3. Design and construct levee restoration to authorized level of flood 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)

NOAA River Level Observations & Forecasts

NOAA Water Gauge Levels

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 3 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 8 Jul 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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