US Army Corps of Engineers
Omaha District

L601 Direct Assistance Information

Background: The L-594-601 Missouri River Left Bank Levee System experienced significant damage during the 2019 Flood Event.  This led to four (4) breaches, along with substantial other damages, occurring throughout the Levee System.

Current Action: The L-601 Levee System is no longer active in the PL 84-99 program, making it ineligible for rehabilitation assistance.  However, a priority breach impacting the I-29 corridor was identified and determined eligible for emergency operations flood fighting direct assistance.  The construction contract for this direct assistance flood fighting effort was awarded on 14 May 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. 

Emergency Flood Fighting Operations:

 

Direct Assistance Repair - 2.5 mi NW of Bartlett, IA

Contractor

Newt Marine Service of Dubuque, IA

Contract Amount

$8.5 Million

Contract Award

May 14, 2019

  Construction Start

May 15,2019

Completion

October 4, 2019

 

 

 

 

 

 

 

 

 

Next Steps:

Due to this levee system no longer being active in the PL 84-99 program, the system is currently not eligible for repairs or rehabilitation efforts beyond the priority breach closures.

Status Update:

08 November 2019 - Repairs to the Waubonsie Avenue tie-in are complete with final inspection occurring on 06 November. Following these efforts, there is no additional USACE repair work on L-601 scheduled at this time; however, the levee sponsor is preparing to conduct follow-on repairs to the levee system.

24 October 2019 - The levee repair work is complete including final inspection that occurred on 03 October 2019. The team is working to finalize repairs to the Waubonsie Avenue tie-in that was affected by erosion during the levee repair project. Following these efforts, there is no additional USACE repair work on L-601 scheduled at this time; however, the levee sponsor is preparing to conduct follow-on repairs to the levee system.

13 October 2019 - The contractor is finalizing the repair efforts and is tentatively scheduled to demobilize from the site in mid-October. There is no additional USACE repair work on L-601 scheduled at this time; however the levee sponsor is preparing to conduct follow-on repairs on the L-601 system.

27 September 2019 – The contractor is finalizing the repair efforts and is tentatively scheduled to demobilize from the site in early October.

13 September 2019 – The estimated contract completion is on schedule and it is anticipated that the contractor will de-mobilize from the site in late-September.

06 September 2019 – The contractor is almost complete with the emergency breach repair efforts and the project is still on schedule to be complete by mid-September 2019.

29 August 2019 – The estimated contract completion and de-mobilization remains on track to finish mid-September 2019.

23 August 2019 – The repairs are substantially complete. Remaining work by the contractor includes rip rap placement, erosion control matting, and de-construction of the haul road. The estimated contract completion and de-mobilization is mid-September 2019.

13 Aug 2019 – Breach closure occurred on 3 July 2019, and work is approximately 90% complete. Remaining work by the contractor includes shaping and grading the sand berm and sand levee.

05 Aug 2019 –The Contractor is working to shape and grade the sand berm and sand levee. Work remaining includes rip rap placement, erosion control matting, and de-construction of the haul road. Estimated contract completion and de-mobilization is now early September 2019.

31 July 2019 – Breach closure occurred on 03 July 2019. The dredging of additional sand yardage has concluded due to the required quantity being in place within the alignment. The Contractor is working to shape and grade the sand berm in advance of construction of the sand levee on top. Estimated contract completion is mid-August.

22 July 2019 – Contractor has completed widening and raising of sand berm and is working to shape and grade it in advance of construction of the sand levee on top.

08 July 2019 – The initial breach closure was completed on 03 July 2019.  Contractor continues to complete widening and raising the sand berm. The team has identified four (4) additional breaches for repair efforts.

11 June 2019 – Three 12" dredges are on site and actively dredging to repair the priority breach to the 25-yr water surface elevation.

NOAA River Level Observations & Forecasts

NOAA Water Gauge Levels

L601 Levee Imagery

Photo documents overtopping of levee L601 near Glenwood, IA Mar. 15, 2019, which resulted from a a major runoff event. (Photo by USACE, Omaha District)

Video Gallery

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Aerial View of Levee L601 Apr. 15, 2019
U.S. Army Corps of Engineers, Omaha District
April 15, 2019 | 11:24
Aerial view of Levee L601 Apr. 15, 2019, following March 2019 runoff event. (Video by Mike Glasch)
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