Summary
Built in 1954 by the USDA NRCS, this earth dam stands at a height of 14 feet and stretches 300 feet in length. With a primary purpose of serving as a fire protection, stock, or small fish pond, the dam has a storage capacity of 86 acre-feet, with a normal storage level of 31 acre-feet.
Despite its low hazard potential, Lyle Nelson #7 is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and undergoes regular inspections, permitting, and enforcement. The dam's spillway has a width of 60 feet and can handle a maximum discharge of 600 cubic feet per second. The surrounding drainage area is relatively small at 0.28 square miles, making this dam crucial for local water resource management in the area.
While the dam's condition assessment is currently listed as "Not Rated," its emergency action plan (EAP) status, risk assessment, and management measures remain undisclosed. With its strategic location and multiple uses, Lyle Nelson #7 plays a significant role in providing water security for the surrounding area, as well as serving as a vital resource for fire protection and livestock management.
Year Completed |
1954 |
Dam Length |
300 |
Dam Height |
14 |
River Or Stream |
ANDERSON CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Drainage Area |
0.28 |
Nid Storage |
86 |
Hazard Potential |
Low |
Nid Height |
14 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Milk River At Nashua Mt
|
233cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
Redwater River At Circle Mt
|
4cfs |
Milk River At Tampico Mt
|
123cfs |
Poplar River Near Poplar Mt
|
28cfs |
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.
Lyle Nelson #7