De Trobriand Gma #1 Reservoir Report
Last Updated: December 14, 2025
De Trobriand Gma #1 is a Federal-owned fish and wildlife pond located in McLean, North Dakota.
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Summary
This Earth dam, completed in 1986, stands at a height of 17 feet and spans 265 feet in length. Serving as a habitat for aquatic life, the pond has a storage capacity of 55.8 acre-feet and covers a surface area of 10.7 acres.
Managed by the North Dakota Game and Fish Department, De Trobriand Gma #1 is regulated by the North Dakota State Water Commission. The dam is classified with a low hazard potential and a moderate risk assessment rating. Despite being in good condition and not having a current emergency action plan in place, the dam is regularly inspected and maintained to ensure the safety and functionality of the structure.
Located along the Lake Sakakawea tributary, this dam contributes to the conservation efforts of the surrounding wildlife and helps maintain a healthy ecosystem in the region. As climate change continues to impact water resources, the proper management of dams like De Trobriand Gma #1 becomes increasingly crucial in safeguarding our environment and preserving biodiversity for future generations.
Year Completed |
1986 |
Dam Length |
265 |
Dam Height |
17 |
River Or Stream |
LAKE SAKAKAWEA-TR |
Primary Dam Type |
Earth |
Surface Area |
10.7 |
Drainage Area |
1.89 |
Nid Storage |
55.8 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
17 |
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.
De Trobriand Gma #1
14th Street Northwest McLean County