Pool No. 8 Reservoir Report
Nearby: Pool No. 3 Pool No. 7
Last Updated: December 12, 2025
Pool No.
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Summary
8, also known as Agassiz, is a Federal-owned fish and wildlife pond located in Thief River Falls, Minnesota. Constructed in 1980 by the US Fish and Wildlife Service, this Earth dam stands at a height of 13 feet and spans a length of 12,000 feet. With a storage capacity of 3,000 acre-feet and a surface area of 530 acres, this pond serves as a vital habitat for various aquatic species in the region.
Managed by the Omaha District of the US Army Corps of Engineers, Pool No. 8 plays a crucial role in conservation efforts within the Thief River watershed. Despite its low hazard potential, the risk assessment for this structure indicates a very high risk, highlighting the importance of regular inspections and proper maintenance. While the dam's condition is currently not rated, it is clear that this water resource is of significant ecological value and requires careful management to ensure its long-term sustainability.
For water resource and climate enthusiasts, Pool No. 8 presents an intriguing case study in environmental stewardship and habitat preservation. With its controlled spillway, the dam helps regulate water flow and maintain stable water levels for the benefit of wildlife and aquatic ecosystems. As part of the broader conservation efforts in the region, this Federal-owned pond serves as a vital resource for both the local community and the diverse flora and fauna that call the Thief River watershed home.
Year Completed |
1980 |
Dam Length |
12000 |
Dam Height |
9 |
River Or Stream |
THIEF RIVER |
Primary Dam Type |
Earth |
Surface Area |
530 |
Drainage Area |
3 |
Nid Storage |
3000 |
Structural Height |
13 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
13 |
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. 8