Detergent Reservoir Report
Nearby: Soap Creek Milford Colony
Last Updated: December 5, 2025
Detergent is a privately owned earth dam located in Milford Colony, Montana, along Hogan Creek.
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Summary
Built in 1956, this dam serves multiple purposes including fire protection, stock, and small fish pond. With a height of 15 feet and a storage capacity of 62 acre-feet, Detergent has a low hazard potential and is currently not rated in terms of its condition assessment.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Detergent is subject to state regulation, permitting, inspection, and enforcement. Despite its age, the dam has not been modified in recent years and its emergency action plan (EAP) status is unknown. The dam's risk assessment, inundation maps, and risk management measures are also not documented, highlighting the need for continued monitoring and maintenance to ensure the safety and integrity of this vital water resource.
Located in Lewis and Clark County, Detergent is under the jurisdiction of the Walla Walla District of the US Army Corps of Engineers. With a primary purpose of providing essential services to the local community, this dam plays a crucial role in water management and conservation efforts in the region. As water resource and climate enthusiasts, it is important to stay informed about the status of dams like Detergent to support sustainable practices and protect our valuable natural resources for future generations.
Year Completed |
1956 |
Dam Length |
150 |
Dam Height |
15 |
River Or Stream |
HOGAN CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
62 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Detergent