Dietz Dam; Bob Reservoir Report
Nearby: Orange Dam Peterson Dam; Charles 1
Last Updated: December 6, 2025
Dietz Dam, also known as Bob Dam, is a private earth dam located in Adams County, North Dakota.
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Summary
Designed by USFWS and completed in 1993, the dam serves multiple purposes including fire protection and as a stock or small fish pond. The dam is situated on Plum Creek with a height of 6.4 feet and a length of 583 feet, providing a storage capacity of 65.7 acre-feet and a surface area of 5 acres.
With a low hazard potential and a moderate risk assessment, Dietz Dam is regulated by the North Dakota State Water Commission and undergoes regular inspections and enforcement. The dam features an uncontrolled spillway with a width of 340 feet, ensuring a safe release of excess water. Despite not being rated for its condition, the dam meets state permitting and inspection requirements, contributing to its overall operational efficiency.
Water resource and climate enthusiasts will appreciate the ecological benefits of Dietz Dam, as it provides a habitat for small fish and contributes to the local fire protection efforts. Situated in a scenic location along Plum Creek, the dam serves as a valuable asset for both the surrounding community and the environment. With its sturdy earth construction and regulated maintenance, Dietz Dam stands as a testament to responsible water resource management in North Dakota.
Year Completed |
1993 |
Dam Length |
583 |
Dam Height |
6.4 |
River Or Stream |
PLUM CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
17.66 |
Nid Storage |
65.7 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
6 |
Seasonal Comparison
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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.
Dietz Dam; Bob