Rustan Dam; Lewellyn Reservoir Report
Last Updated: December 14, 2025
Rustan Dam, also known as Lewellyn Dam, is a private-owned structure located in Hettinger, North Dakota.
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Summary
Completed in 2000, this earth dam stands at a height of 12.1 feet and has a storage capacity of 72.1 acre-feet, serving primarily as a fish and wildlife pond along Chantapeta Creek. With a surface area of 9 acres and a drainage area of 2.19 square miles, Rustan Dam provides essential habitat for local wildlife while also offering recreational opportunities for visitors.
Managed by the North Dakota State Water Commission, Rustan Dam has a low hazard potential and a moderate risk assessment rating. The dam features an uncontrolled spillway with a width of 70 feet and vertical lift outlet gates for water release. Although the dam's condition is currently not rated, regular inspections and enforcement measures are in place to ensure its safety and continued functionality. Additionally, the dam is equipped with emergency action plans to mitigate any potential risks and ensure the protection of surrounding areas in case of emergencies.
Despite its relatively small size, Rustan Dam plays a crucial role in supporting the ecological balance of the region and providing a valuable resource for wildlife conservation efforts. As climate change continues to impact water resources and ecosystems, structures like Rustan Dam are vital for maintaining biodiversity and ensuring the sustainability of natural habitats in the face of environmental challenges.
Year Completed |
2000 |
Dam Length |
331 |
Dam Height |
12.1 |
River Or Stream |
CHANTAPETA CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
2.19 |
Nid Storage |
72.1 |
Outlet Gates |
Vertical Lift |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
12 |
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.
Rustan Dam; Lewellyn