Summary
This earth dam, completed in 1958, serves multiple purposes including fire protection, stock watering, and small fish pond management. With a dam height of 20 feet and a storage capacity of 67 acre-feet, Bob #4 provides essential resources to the local community while also supporting the ecosystem of the area.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Bob #4 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite its age, the dam continues to play a crucial role in water management in Garfield County. The surrounding area, including Congressional District 00, Montana, benefits from the water stored in Bob #4 for various uses, highlighting the importance of maintaining and monitoring this vital water structure.
Although Bob #4 has not been recently inspected or assessed for condition, it remains a key component of water resource infrastructure in the region. With its strategic location and multi-purpose design, this private dam contributes to the sustainable management of water resources in the area, ensuring the availability of water for fire protection, livestock, and environmental conservation in Cohagen and beyond.
Year Completed |
1958 |
Dam Length |
190 |
Dam Height |
20 |
River Or Stream |
GRAVEYARD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
67 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Yellowstone River At Forsyth Mt
|
5430cfs |
Yellowstone River At Miles City Mt
|
8100cfs |
Tongue River At Miles City Mt
|
263cfs |
Redwater River At Circle Mt
|
1cfs |
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.
Bob #4