Rock Creek 1-2 Reservoir Report

Last Updated: December 13, 2025

Rock Creek 1-2 is a local government-owned earth dam located in Pawnee, Nebraska, designed by the USDA NRCS and completed in 1967.


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Summary

This dam serves multiple purposes, including flood risk reduction, with a primary purpose classified as 'Other'. It has a structural height of 28 feet and a hydraulic height of 26 feet, with a storage capacity of 49 acre-feet and a drainage area of 0.18 square miles. The dam spans 520 feet in length and is situated on the TR-Rock Creek, under the regulatory oversight of the Nebraska Department of Natural Resources.

Despite its low hazard potential, Rock Creek 1-2 is currently assessed as being in poor condition as of June 2016. It undergoes inspections every 5 years, with the last one conducted in June 2016. The dam's emergency action plan status and risk management measures are currently unknown, raising concerns about its preparedness for potential emergencies. With a maximum discharge capacity of 160 cubic feet per second, stakeholders and water resource enthusiasts should closely monitor the condition and maintenance of Rock Creek 1-2 to ensure its continued effectiveness in flood risk reduction and water management in the region.

Year Completed

1967

Dam Length

520

Dam Height

28

River Or Stream

TR-ROCK CREEK

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

26

Drainage Area

0.18

Nid Storage

49

Structural Height

28

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.