Thompson Dam; Robert Reservoir Report
Nearby: Kalina Dam Kempenich Dam; Leinniece
Last Updated: December 5, 2025
Thompson Dam, also known as Wetland #1, is a private-owned structure located in Bowman, North Dakota.
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Summary
Built in 1930 by the USFWS, this Earth-type dam serves as a Fish and Wildlife Pond along Spring Creek. With a height of 14 feet and a length of 520 feet, the dam has a storage capacity of 217.3 acre-feet and a normal storage of 50 acre-feet.
The dam has a low hazard potential and a moderate risk level, with a spillway width of 75 feet and an uncontrolled spillway type. It underwent structural modifications in 1992 and is equipped with one vertical lift outlet gate. While it is not currently rated for its condition, the dam is regulated, permitted, inspected, and enforced by the NDSWC in North Dakota.
Thompson Dam plays a crucial role in the management of fish and wildlife in the area, providing a habitat for various species. Despite its age, the dam continues to serve its purpose effectively and contributes to the conservation efforts in the region.
Years Modified |
1992 - Structural |
Year Completed |
1930 |
Dam Length |
520 |
Dam Height |
14 |
River Or Stream |
SPRING CREEK |
Primary Dam Type |
Earth |
Surface Area |
21.3 |
Drainage Area |
5.33 |
Nid Storage |
217.3 |
Outlet Gates |
Vertical Lift - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
14 |
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.
Thompson Dam; Robert