Summary
Managed by the Bureau of Indian Affairs, this Earth dam was completed in 1967 and stands at a structural height of 75 feet, with a normal storage capacity of 5200 acre-feet. The reservoir, situated along the Jocko River, covers a surface area of 544 acres and serves as a source of water for agricultural activities in the region.
Despite its high hazard potential, Black Lake has not had a condition assessment available since its last inspection in May 2012. The reservoir's Emergency Action Plan (EAP) was last revised in March 2015, indicating a need for updated emergency preparedness measures. With a very high risk rating and the potential for inundation, stakeholders must prioritize the maintenance and management of Black Lake to ensure the safety and sustainability of its operations for both irrigation and recreational purposes.
Year Completed |
1967 |
Dam Length |
544 |
River Or Stream |
JOCKO RIVER |
Primary Dam Type |
Earth |
Nid Storage |
5200 |
Structural Height |
75 |
Hazard Potential |
High |
Nid Height |
75 |
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 |
|---|---|---|
Hidden Lake Campground
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Double Arrow Lookout
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Lake Inez Campground
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Lake Inez
|
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Seeley Lake Campground
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Seeley Lake Complex
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Black Lake
Headwaters, Sec. 17, T19N, R15W To Seeley Lake, Sec. 20, T17N, R15W