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Waterloo - Elkhorn River RB Location
City, County, and State of the levee system. Determined by the levee alignment location not the leveed area.
Waterloo, Douglas County, Nebraska
System ID
Unique identifier code for the levee system using 10 or 12 numbers in length.
4705000091
Operation and Maintenance Organization
Entity responsible for day-to-day management of the levee.
City of Waterloo
Floodplain Management
Entities responsible for regulating activities that occur in areas prone to flooding.
FEMA Region 7
Oversight Organization
Entity responsible for oversight of the levee and ensuring it is maintained.
USACE - Omaha District
Last Assesment Date Last Risk Assessment or Formal Inspection.
3/26/2026
Data Last Updated Date any of this information for the system has been updated.
3/28/2026
Levee Length
Combine length of all the levee system features including the embankments, floodwalls, closures where they exist for this system.
3.408 Miles Average Levee Height
The average height of the levee system. The levee profile viewer on the mapping window will show the actual levee height values for the length of the levee if available.
8 Feet Year Levee Constructed Year levee system was fully completed as a flood reduction project.
1967 Summary
General text description of the levee system with a summary of why the levee is there, and the benefits it provides.
The project is located in the Village of Waterloo in Douglas County, Nebraska and is comprised of an earthen levee segment along the right bank of the Elkhorn River, approximately 12.5 miles upstream from the confluence with the Platte River. The project was authorized by Public Law 516, 81st Congress, Second Session, approved 17 May 1950. Construction for the project was completed 30 April 1967. The levee was improved in 2011 to meet Federal Emergency Management Agency (FEMA) requirements. Improvements included an increase in levee height to meet freeboard requirements, levee realignment, and drainage structure improvements. The levee provides flood risk reduction benefits for 620 people and 386 structures, including an ambulance station, an EMS provider, a fire station, and a school. Since its construction the levee project has prevented $4.7 million in damages. Project features include earth levees, drainage structures, surfacing for levee top, sod cover, and riprap protection. In general, the crown width of the levee is 10 feet. The side slopes are one foot vertical on three feet horizontal. The average height of the levee is 10 feet. Total length of the earth levee is approximately 3.4 miles.
Performance & Condition
General text description of the historical and anticipated performance of the levee, the people and property benefitting from the levee and who may be at risk of flooding, and actions to address areas of concern.
A risk assessment was performed in 2013, using inspection ratings from a 2012 Periodic Inspection. The levee has not been significantly tested since its construction. The largest flood event since construction occurred in 2010, in which a small percentage of the levee was loaded. The levee performed as designed during this event, with no major performance issues. In the levee risk assessment, embankment and foundation seepage and piping was identified as the highest contributor to overall risk in the levee system. A failure of the levee may result in flood depths of up to 7.5 feet, loss of life, and moderate property damage.
Flooding Hazard
Historic Loading by Percentage of Height
Representative loading associated with historical flood information as a percentage of the levee height or overtopping.
Representative loading associated with historical flood information as a percentage of the levee height or overtopping.
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