Lower Hackett Dam Reservoir Report
Nearby: Krs No. 3 Alkali Dam
Last Updated: December 13, 2025
Lower Hackett Dam, also known as Red Reservoir, is a gravity dam located in Natrona, Wyoming, along Hackett Creek.
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Summary
Owned and regulated by the Bureau of Land Management, this federal structure serves the primary purpose of debris control. Completed in 1967, the dam stands at a structural height of 37 feet and has a hydraulic height of 33 feet, with a length of 1052 feet. It has a storage capacity of 171 acre-feet and a normal storage level of 43 acre-feet, covering a surface area of 15.2 acres with a drainage area of 10.31 square miles.
Despite its low hazard potential, Lower Hackett Dam has been assessed as unsatisfactory in condition, with a moderate risk level. The dam is equipped with an uncontrolled spillway and has no outlet gates. It has undergone inspections every five years, with the most recent inspection conducted in July 2017. The structure has not been modified since its completion, and there are no associated locks or lock structures. While the dam does not fall under the jurisdiction of the US Army Corps of Engineers, it remains a crucial component in managing water resources and mitigating potential risks in the region.
Year Completed |
1967 |
Dam Length |
1052 |
River Or Stream |
HACKETT CREEK |
Primary Dam Type |
Gravity |
Surface Area |
15.2 |
Hydraulic Height |
33 |
Drainage Area |
10.31 |
Nid Storage |
171 |
Structural Height |
37 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
37 |
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.
Lower Hackett Dam
Buffalo Creek (Lower)