Sigvaldsen Dam; Brad 1 Reservoir Report
Last Updated: December 6, 2025
Located in Adams, North Dakota, the Sigvaldsen Dam; Brad 1, also known as Wetland 2, is a privately owned structure designed by USFWS for the primary purpose of serving as a Fish and Wildlife Pond.
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Summary
Constructed in 1998, this Earth dam stands at a height of 15.3 feet and has a length of 630 feet, with a storage capacity of 138.3 acre-feet.
With a low hazard potential and moderate risk assessment, the Sigvaldsen Dam; Brad 1 is regulated and inspected by the North Dakota State Water Commission. The dam has a spillway width of 60 feet and is equipped with uncontrolled spillway type, ensuring proper water management and safety measures. Although the condition assessment is not rated, the dam has not required any modifications since its completion.
Water and climate enthusiasts will appreciate the ecological significance of the Sigvaldsen Dam; Brad 1, as it provides essential habitat for fish and wildlife in the area. With its strategic location on the Cedar Creek-TR stream and its contributions to the local ecosystem, this dam serves as a valuable resource for preserving biodiversity and supporting environmental conservation efforts in North Dakota.
Year Completed |
1998 |
Dam Length |
630 |
Dam Height |
15.3 |
River Or Stream |
CEDAR CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
16.7 |
Drainage Area |
3.75 |
Nid Storage |
138.3 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
15 |
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.
Sigvaldsen Dam; Brad 1