Summary
Constructed in 1961 by the USDA NRCS, this earth dam stands at 16.4 feet high, with a hydraulic height of 12.5 feet, and a length of 740 feet. Serving the primary purpose of irrigation, Delaney has a storage capacity of 935 acre-feet, with a normal storage level of 460 acre-feet.
Situated on Fourmile Creek with a drainage area of 19 square miles, Delaney poses a significant hazard potential and has a moderate risk assessment value. Despite not having a condition assessment rating, the dam is regulated by the Montana Department of Natural Resources and Conservation, with state permitting, inspection, and enforcement in place. The spillway, with a width of 103 feet, is uncontrolled and is designed to handle a maximum discharge of 940 cubic feet per second.
Owned by a private entity, Delaney plays a crucial role in supporting agricultural activities in the region. With its historical significance and impact on water resource management, this irrigation dam serves as a vital infrastructure for the local community and contributes to the sustainable utilization of water resources in Richland County, Montana.
Year Completed |
1961 |
Dam Length |
740 |
Dam Height |
16.4 |
River Or Stream |
FOURMILE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
12.5 |
Drainage Area |
19 |
Nid Storage |
935 |
Hazard Potential |
Significant |
Nid Height |
16 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Snowden Bridge FAS
|
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Sharbano City Park
|
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Fort Buford State Historic Site
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Delaney