Pool No. 23 Reservoir Report
Nearby: Pool No. 21 Pool No. 22
Last Updated: December 13, 2025
Pool No.
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Summary
23, also known as Kelly Pool, is a fascinating water resource located in Thief River Falls, Minnesota. This federal-owned structure was completed in 1946 and serves a primary purpose that falls under the category of "Other." The dam associated with Pool No. 23 is of the Earth type, with a height of 8 feet and a length of 5500 feet.
Situated on the Mud River, Pool No. 23 has a maximum storage capacity of 1495 acre-feet and a normal storage capacity of 1145 acre-feet. Despite its low hazard potential and current "Not Rated" condition assessment, this water resource has not been inspected recently and lacks certain emergency preparedness measures. The structure is under the jurisdiction of the Omaha District of the US Army Corps of Engineers and is not regulated or permitted by the state.
For water resource and climate enthusiasts, Pool No. 23 presents an intriguing opportunity to explore the intersection of human-made structures and natural water systems. With its historical significance and potential for further research on its impact on the surrounding environment, this site offers a unique perspective on the management and utilization of water resources in the state of Minnesota.
Year Completed |
1946 |
Dam Length |
5500 |
Dam Height |
8 |
River Or Stream |
MUD RIVER |
Primary Dam Type |
Earth |
Nid Storage |
1495 |
Structural Height |
8 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Pool No. 23