Rock Creek 3-4 Reservoir Report

Last Updated: December 11, 2025

Rock Creek 3-4 is a local government-owned earth dam located in Pawnee, Nebraska, designed by USDA NRCS and regulated by the Nebraska Department of Natural Resources.


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Summary

Completed in 1974, this dam serves primarily for flood risk reduction, with a normal storage capacity of 22 acre-feet and a maximum discharge of 595 cubic feet per second. The dam stands at 24 feet in height with a structural height of 25 feet, spanning 582 feet in length and covering a surface area of 6 acres.

Rock Creek 3-4 is classified as having a low hazard potential and is currently in satisfactory condition, last assessed in June 2016. Despite its age, the dam continues to meet regulatory standards and undergoes inspections every 5 years to ensure its safety and functionality. With its vital role in managing water resources in the area, Rock Creek 3-4 stands as a testament to the importance of infrastructure in mitigating flood risks and protecting communities in Nebraska.

Year Completed

1974

Dam Length

582

Dam Height

24

River Or Stream

TR-ROCK CREEK

Primary Dam Type

Earth

Surface Area

6

Hydraulic Height

23

Drainage Area

0.6

Nid Storage

112

Structural Height

25

Hazard Potential

Low

Foundations

Soil

Nid Height

25
       
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.