Milford Colony Reservoir Report
Nearby: Flat Milford Colony Evans, L.
Last Updated: February 23, 2026
Milford Colony, located in Cascade, Montana, is a state-regulated dam designed by the USDA NRCS for fire protection, stock, or small fish pond purposes.
Summary
Completed in 1963, this earth dam stands at a height of 15 feet and has a storage capacity of 92 acre-feet. The dam, situated on TR-Hogan Creek, serves its community with a low hazard potential and a moderate risk assessment rating.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Milford Colony's dam is inspected, permitted, and enforced by the state regulatory agency. With a drainage area of 4.59 square miles and a maximum discharge of 530 cubic feet per second, the dam plays a crucial role in water resource management in Lewis and Clark County. Despite its uncontrolled spillway type, the dam's risk management measures are not specified, indicating a need for continued monitoring and assessment to ensure its safety and integrity for the surrounding area.
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°F
mph
Wind
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Humidity
15-Day Weather Outlook
Year Completed |
1963 |
Dam Length |
150 |
Dam Height |
15 |
River Or Stream |
TR-HOGAN CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Drainage Area |
4.59 |
Nid Storage |
92 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Dearborn River Near Craig Mt
|
53cfs |
Sun River At Simms Mt
|
2350cfs |
Sun River Bl Willow Cr Nr Augusta Mt
|
2030cfs |
Missouri River At Cascade Mt
|
4680cfs |
Little Prickly Pear Cr At Wolf Cr Mt
|
19cfs |
Missouri River Bl Holter Dam Nr Wolf Cr Mt
|
3930cfs |
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.
Milford Colony