Dietz Storage #8 Reservoir Report
Nearby: Tongue River Dam Pond R1
Last Updated: December 5, 2025
Dietz Storage #8, located in Big Horn, Montana, is a privately owned earth dam completed in 2007 for offstream water storage on TR Anderson Creek.
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Summary
With a height of 25 feet and a length of 2045 feet, this dam has a maximum storage capacity of 100.07 acre-feet and a normal storage capacity of 82.36 acre-feet. The surface area of the reservoir is 5.58 acres, making it a valuable resource for water management in the area.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Dietz Storage #8 is classified as having a low hazard potential and is currently rated as "Not Rated" for condition assessment. While the dam does not have an Emergency Action Plan (EAP) in place or updated inundation maps, it is subject to regular state inspections and enforcement measures to ensure its safety and compliance with regulations. Water resource and climate enthusiasts can appreciate the role of this dam in providing essential water storage and management services in the region.
As a vital infrastructure for water resource management in the area, Dietz Storage #8 represents a significant investment in offstream water storage on TR Anderson Creek. With its capacity to store over 100 acre-feet of water, this earth dam plays a crucial role in ensuring water availability for various uses, including agriculture, industry, and wildlife habitat. Climate enthusiasts will find value in understanding the importance of such structures in adapting to changing climate conditions and ensuring sustainable water resources for the future.
Year Completed |
2007 |
Dam Length |
2045 |
Dam Height |
25 |
River Or Stream |
OFFSTREAM -TR ANDERSON CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.58 |
Hydraulic Height |
25 |
Nid Storage |
100.07 |
Structural Height |
25 |
Hazard Potential |
Low |
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.
Dietz Storage #8