Gronaas Dam; Clemet Reservoir Report
Nearby: Tolna Dam No. 1 Edsrud Dam; Myron
Last Updated: December 13, 2025
The Gronaas Dam, also known as the Granaas Dam, is a private-owned structure located in Nelson County, North Dakota.
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Summary
Built in 1968, this earth-type dam stands at a height of 11 feet and spans a length of 400 feet, with a storage capacity of 121 acre-feet for fire protection, stock, or small fish pond purposes. Situated on the Sheyenne River, the dam is regulated by the North Dakota State Water Commission and undergoes regular inspections, permitting, and enforcement to ensure its safety and compliance with state regulations.
With a low hazard potential and a moderate risk assessment score of 3, the Gronaas Dam is equipped with an uncontrolled spillway with a width of 40 feet. While the dam is not currently rated for condition assessment, it is maintained for emergency preparedness, although details on emergency action plans and risk management measures are not specified in the data. Despite its limited hazard potential, the Gronaas Dam serves as an important structure for water resource management in the region, providing essential functions for fire protection and livestock watering needs.
Overall, the Gronaas Dam; Clemet is a key infrastructure in the area for maintaining water resources and supporting various purposes such as fire protection and stock watering. With its moderate risk assessment and low hazard potential, the dam stands as a reliable structure on the Sheyenne River, regulated by the North Dakota State Water Commission. While more information is needed on its condition assessment and emergency preparedness measures, the Gronaas Dam remains a vital component in the region's water management efforts.
Year Completed |
1968 |
Dam Length |
400 |
Dam Height |
11 |
River Or Stream |
SHEYENNE RIVER-TR |
Primary Dam Type |
Earth |
Surface Area |
19 |
Drainage Area |
1.75 |
Nid Storage |
121 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
11 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Tolna Dam
|
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Tolna City Park
|
||
Stump Lake Park
|
||
McHenry City Park
|
||
Binford Park Campground
|
Gronaas Dam; Clemet