Green River Dam Reservoir Report
Last Updated: December 6, 2025
The Green River Dam, located in Stark, North Dakota, was completed in 1933 by the Civilian Conservation Corps (CCC) and stands at a height of 12 feet with a structural height of 14 feet.
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Summary
This masonry dam on the Green River serves primarily for recreational purposes and has a storage capacity of 60 acre-feet. The dam is under the regulatory jurisdiction of the North Dakota State Water Commission and is regularly inspected, permitted, and enforced to ensure its safety and functionality.
With a low hazard potential and a moderate risk assessment rating, the Green River Dam is considered a vital structure for water resource management in the area. The dam features an uncontrolled spillway, measuring 90 feet in width, and has not been modified since 1950 when structural improvements were made. Despite not being currently rated for condition assessment, the dam is still considered to be in good standing and meets regulatory guidelines for operation and maintenance.
The Green River Dam stands as a testament to the ingenuity and craftsmanship of the CCC, providing both recreational opportunities and essential water resource management for the surrounding community. With a focus on safety and compliance with state regulations, this masonry dam continues to play a crucial role in maintaining the integrity of the Green River and ensuring the safety of those downstream.
Years Modified |
1950 - Structural |
Year Completed |
1933 |
Dam Length |
100 |
Dam Height |
12 |
River Or Stream |
GREEN RIVER |
Primary Dam Type |
Masonry |
Drainage Area |
356 |
Nid Storage |
60 |
Structural Height |
14 |
Outlet Gates |
None |
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.
Green River Dam