US Army Corps of Engineers
Omaha District

L594 Levee Restoration Information

Background: The L575-594 Benton-Washington – Pleasant Valley - Waubonsie Levee System experienced significant damage during the 2019 Flood Event.  This led to five (5) breaches, along with substantial other damages, occurring throughout the Levee System.

Current Action: Two priority breaches impacting the I-29 corridor have been closed. Follow-on actions to increase the resiliency of the damaged levee system are currently being developed. 

Restoration Activities:

 

Initial Breach Repair #1 – 1.25 mi. SW of Bartlett, IA

Initial Breach Repair #2 – 0.4 mi. S of Bartlett, IA

Contractor

Diamond Group Engineering from Santa Ana, CA

Iron Mike - Bristol HVB, LLC of Centennial, CO

Contract Amount

$250,000

$4.7 Million

Contract Award

May 20, 2019

September 16, 2019

Construction Start

May 21, 2019

September 16, 2019

Completion

July 1, 2019

October 28, 2019

 

Next Steps:

  1. Conduct physical damage assessment when water levels recede and the levees are accessible.
  2. Design and construct levee rehabilitation to authorized level of flood risk management.

Status Updates:

08 November 2019 – The priority breach closure was completed on 28 October. The contractor is finalizing several remaining items and is scheduled to demobilize from the project site by the end of the month. A follow-on contract for interim repairs to increase the resiliency of the damaged levee system is currently being developed.

24 October 2019 The contractor has closed the eastern half of the northern inlet breach and is anticipating having the entire breach closed by the end of the month. This closure will provide an interim level of flood risk management benefits to the area behind the levee.

18 October 2019 – The east side of Breach A, the breach is divided by the railroad tracks, was closed on Oct. 12. It is anticipated that the west side of the breach will be closed later this month, providing an interim level of flood risk management benefits to the area behind the levee system.

13 October 2019 - The team is anticipating closing the northern (A) breach in the next few weeks pending no significant weather impacts. 

27 September 2019 – The interim repair contract was awarded to Iron Mike - Bristol HVB, LLC of Centennial, CO for $4,710,696 on 16 September 2019 with a period of performance of 90 calendar days. Waubonsie Creek was temporarily closed by the Contractor on 19 September 2019 to allow for repair work on the northern "A" breach.

13 September 2019 – Proposals for the interim repair contract on the L-594 system were received on 09 Sep 2019.  The team is now working through the contracting process to award the construction contract.

06 September 2019 – The official Request for Proposals was sent out to the pre-qualified contractor pool on 27 Aug 2019. The pre-bid site walk was conducted on 04 Sep 2019 and the proposals are due on 10 Sep 2019.

29 August 2019 – The draft scope of work for completing the next phase of repairs of the L-594 levee system has been developed and the team is issuing the formal Request for Proposals (RFP) in the next few days.

23 August 2019 – The draft scope of work for completing the next phase of repairs of the L-594 levee system has been developed and the team is working towards awarding the construction contract associated with these repairs.

13 Aug 2019 – The Draft scope of work is being finalized by the team.

05 Aug 2019 – All work at the first breach is complete and the contractor has demobilized from the site. The scope of work is under development for the initial breach repair at the second (northern) priority breach. 

31 July 2019 – All work is complete on Breach B and the final inspection was held on 01 July 2019.  The scope of work is under development for the initial breach repair at Breach A. 

22 July 2019 – The team continues to develop a plan for initial repairs to the other identified priority breach on the L-594 system.

08 July 2019 – All work on the first breach is complete and the final inspection was held on 01 July 2019.  The team is now developing a plan for initial repairs to the other identified priority breach on the L-594 system.

20 June 2019 – The first priority breach was initially closed on 13 June 2019.  This repair restores this section of the levee system to its pre-flood elevation.  Only minor finishing work remains before this construction contract is complete.

12 June 2019 – The contractor resumed work on the breach 1-1/4 miles SW of Bartlett, IA on 5 June following the late May high water event. Current plan is to repair damaged levee crest ruts and initially close breach within the next week.

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NOAA Water Gauge Levels

L594 Imagery

Ongoing construction to repair the L-594 breach location approximately 0.5 miles south of Bartlett, Iowa. Photo taken on Sep. 23, 2019.
Photo documents levee L594 breach near Fremont, IA Mar. 14, 2019. (Photo by USACE, Omaha District).
Photo documents levee L594 breach near Fremont, IA Mar. 14, 2019. (Photo by USACE, Omaha District).
The contractor closed the east side of the north inlet breach on 12 October 2019.

Video Gallery

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Aerial view of Levee L594 Apr. 15, 2019
U.S. Army Corps of Engineers, Omaha District
April 15, 2019 | 9:13
Aerial view of Levee L594 Apr. 15, 2019, following March 2019 runoff event. (Video by Mike Glasch)
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