Krapp Brothers Dam Reservoir Report

Last Updated: December 13, 2025

Krapp Brothers Dam, located in Stutsman, North Dakota, is a local government-owned structure with a primary purpose of recreation.


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Summary

Built in 1968 by USDA NRCS, this earth dam stands at a height of 24 feet and has a structural height of 27 feet. It spans 480 feet in length and has a storage capacity of 228 acre-feet, with a normal storage level of 135 acre-feet.

The dam is regulated by the North Dakota State Water Commission (NDSWC) and is inspected, permitted, and enforced by state agencies. With a low hazard potential and a moderate risk assessment rating, the dam currently has not been condition-rated. Despite its uncontrolled spillway type and lack of outlet gates, Krapp Brothers Dam presents a safe recreational space for visitors to enjoy activities such as boating, fishing, and swimming in the surrounding Seven Mile Coulee.

For water resource and climate enthusiasts, Krapp Brothers Dam offers a fascinating case study in dam management and recreational development. With its unique design and location, this structure provides valuable storage capacity while balancing environmental concerns and public safety. As efforts continue to maintain and improve the dam's infrastructure, it serves as a vital asset in water management and conservation initiatives in the region.

Year Completed

1968

Dam Length

480

Dam Height

24

River Or Stream

SEVEN MILE COULEE

Primary Dam Type

Earth

Surface Area

16

Nid Storage

228

Structural Height

27

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

27
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.