Apocolipse Reservoir Report
Nearby: Snortland Dam Otilalda
Last Updated: December 5, 2025
Apocolipse is a privately owned earth dam located in Pondera County, Montana, on the TR-SOUTH PONDERA COULEE.
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Summary
Built in 1930, the dam stands at a height of 10 feet and has a storage capacity of 57 acre-feet, with a primary purpose of fire protection, stock, or small fish pond. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is classified as having a low hazard potential.
Despite its age, Apocolipse has not been officially rated for condition assessment, and there is no information available regarding its last inspection date or emergency action plan (EAP) preparation. While the dam's risk assessment, management measures, and inundation maps are unknown, it is important for water resource and climate enthusiasts to stay informed about the potential hazards associated with dams like Apocolipse and advocate for regular inspections and maintenance to ensure public safety and environmental protection in the event of a dam failure.
Year Completed |
1930 |
Dam Length |
50 |
Dam Height |
10 |
River Or Stream |
TR-SOUTH PONDERA COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
10 |
Nid Storage |
57 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Teton River Near Dutton Mt
|
83cfs |
Marias River Near Shelby Mt
|
305cfs |
Teton River Bl South Fork Nr Choteau Mt
|
44cfs |
Lake Creek Near Power Mt
|
30cfs |
Sun River At Simms Mt
|
1620cfs |
Muddy Creek At Vaughn Mt
|
86cfs |
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.
Apocolipse