Flat Milford Colony Reservoir Report
Nearby: Evans, L. Milford Colony
Last Updated: December 5, 2025
Flat Milford Colony is a privately-owned dam located in Lewis and Clark County, Montana, designed by the USDA NRCS for fire protection and as a water source for stock or small fish ponds.
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Summary
Completed in 1955, the earth dam stands at a height of 15 feet and has a storage capacity of 78 acre-feet. Situated on TR-Flat Creek in the Hardy area, the dam is regulated and inspected by the state agency DNRC, ensuring its compliance with safety standards.
With a low hazard potential and a condition assessment of "Not Rated," Flat Milford Colony serves as a crucial infrastructure for water resource management in the region. The dam's primary purpose aligns with its design, providing essential water supply for livestock and fire protection in the surrounding area. The dam's location and design make it a valuable asset for climate enthusiasts, showcasing sustainable water management practices in action.
Despite its age, Flat Milford Colony continues to play a vital role in water conservation and management efforts, reflecting the collaboration between private owners and government agencies in ensuring the safety and sustainability of water resources. As a key feature in the landscape of Lewis and Clark County, this dam serves as a reminder of the importance of maintaining and monitoring water infrastructure for the benefit of the community and the environment.
Year Completed |
1955 |
Dam Length |
150 |
Dam Height |
15 |
River Or Stream |
TR-FLAT CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Drainage Area |
2.37 |
Nid Storage |
78 |
Hazard Potential |
Low |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dearborn River Near Craig Mt
|
40cfs |
Sun River At Simms Mt
|
1620cfs |
Sun River Bl Willow Cr Nr Augusta Mt
|
116cfs |
Little Prickly Pear Cr At Wolf Cr Mt
|
36cfs |
Missouri River At Cascade Mt
|
3110cfs |
Missouri River Bl Holter Dam Nr Wolf Cr Mt
|
2800cfs |
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.
Flat Milford Colony