Harmon Dam; Carl Reservoir Report
Nearby: Irgens Dam; Jim & Tom 3 Epping Dam
Last Updated: December 13, 2025
Harmon Dam, also known as Carl Dam, is a private earth dam located on the Little Muddy River in Williams County, North Dakota.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1987 by designer Charles L Neff, this dam serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a height of 24.5 feet and a storage capacity of 53 acre-feet, the dam covers a surface area of 5.4 acres and has a drainage area of 1.56 square miles.
Managed by the North Dakota State Water Commission, Harmon Dam is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in managing water resources in the region. Despite not having a condition assessment rating, the dam continues to serve its purpose effectively while meeting state regulatory standards.
In the event of an emergency, it is important for the dam owner to have an emergency action plan in place, although details about this aspect of the dam are currently unavailable. Overall, Harmon Dam stands as a testament to the importance of water infrastructure in supporting various aspects of life, from agriculture to fire protection, in the North Dakota landscape.
Year Completed |
1987 |
Dam Height |
24.5 |
River Or Stream |
LITTLE MUDDY RIVER |
Primary Dam Type |
Earth |
Surface Area |
5.4 |
Drainage Area |
1.56 |
Nid Storage |
53 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
Harmon Dam; Carl