Stevens Creek A11-2 Reservoir Report

Last Updated: December 5, 2025

Stevens Creek A11-2 is a flood risk reduction structure located in Lancaster, Nebraska, along the TR-STEVENS CREEK.


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Summary

Built in 2004, this earth dam stands at a height of 25 feet and has a storage capacity of 159 acre-feet. With a drainage area of 0.3 square miles, this structure plays a crucial role in managing water flow and reducing the risk of flooding in the area.

Owned by the local government and regulated by the Nebraska Department of Natural Resources, Stevens Creek A11-2 has been assessed as being in satisfactory condition with a low hazard potential. The dam features stone core and soil foundation, with a hydraulic height of 24 feet and a structural height of 31 feet. The last inspection in June 2016 deemed the structure to be in good working order, with a routine inspection frequency of every 5 years.

Managed by the Kansas City District of the US Army Corps of Engineers, Stevens Creek A11-2 serves as a key component in the flood risk reduction efforts in the region. With its strategic location and effective design, this dam plays a vital role in safeguarding the surrounding communities from potential water-related disasters. For water resource and climate enthusiasts, this structure represents a noteworthy example of responsible water management and infrastructure development in Nebraska.

Year Completed

2004

Dam Length

1000

Dam Height

25

River Or Stream

TR-STEVENS CREEK

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

24

Drainage Area

0.3

Nid Storage

159

Structural Height

31

Hazard Potential

Low

Foundations

Soil

Nid Height

31
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.

Hazard Potential Classification

High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.