Blackwood Creek 72-A Reservoir Report
Last Updated: December 5, 2025
Blackwood Creek 72-A is a locally owned earth dam in Hayes, Nebraska, designed by the USDA NRCS for flood risk reduction.
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Summary
Completed in 1989, this dam stands at a height of 45 feet and has a hydraulic height of 44 feet, with a structural height of 65 feet. It has a storage capacity of 628 acre-feet and serves the primary purpose of flood risk reduction, with a normal storage of 40 acre-feet and a drainage area of 3.8 square miles. The dam has a low hazard potential and is considered to be in satisfactory condition as of the last inspection in June 2020.
Located in the city of MCCOOK, Blackwood Creek 72-A is regulated by the Nebraska Department of Natural Resources and is subject to state permitting, inspection, and enforcement. The dam is situated on the UNNAMED TR-BLACKWOOD CREEK and is part of the Omaha District's jurisdiction. With a length of 760 feet and a surface area of 7 acres, this dam plays a crucial role in managing water resources in the area, with a maximum discharge capacity of 1389 cubic feet per second.
Overall, Blackwood Creek 72-A serves as a key infrastructure for flood risk reduction in Hayes, Nebraska, providing essential protection for the local community against potential water-related disasters. Its satisfactory condition, low hazard potential, and state-regulated status highlight its importance in ensuring the safety and resilience of the region's water resources and environment.
Year Completed |
1989 |
Dam Length |
760 |
Dam Height |
45 |
River Or Stream |
UNNAMED TR-BLACKWOOD CREEK |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
44 |
Drainage Area |
3.8 |
Nid Storage |
628 |
Structural Height |
65 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
65 |
Seasonal Comparison
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Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Blackwood Creek 72-A