Lazy J-D #1 Reservoir Report
Nearby: Philips Bar Island Detention Dam
Last Updated: December 5, 2025
Lazy J-D #1 is a private irrigation dam located in Phillips County, Montana, along Rock Creek.
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Summary
Built in 1952, this earth dam stands at a height of 30 feet and spans 600 feet in length, with a storage capacity of 356 acre-feet. Managed by the Montana Department of Natural Resources and Conservation (DNRC), Lazy J-D #1 is regulated, permitted, inspected, and enforced by the state, ensuring its safe operation and maintenance. Despite its low hazard potential, the dam's condition remains unrated, with no recent inspection data available.
Situated in a remote area with no associated city, Lazy J-D #1 serves as a crucial water resource for irrigation purposes in the region. Owned privately, the dam is not federally funded or managed, highlighting the importance of state oversight in ensuring its functionality. With its location in the Congressional District 00 of Montana, Lazy J-D #1 contributes to the agricultural landscape of the area, supporting the water needs of local farmers and landowners. While lacking specific data on risk assessments and emergency preparedness, the dam's presence underscores the intersection of water management, climate resilience, and agricultural sustainability in the region.
As a significant structure in the Omaha District of the US Army Corps of Engineers, Lazy J-D #1 symbolizes the intricate network of dams and reservoirs that shape water resources management in Montana. With its historical significance dating back to the mid-20th century, the dam stands as a testament to the enduring legacy of irrigation infrastructure in the state. While its current condition assessment is pending, Lazy J-D #1 remains a vital component of the water supply system, highlighting the ongoing challenges and opportunities in managing water resources in a changing climate landscape.
Year Completed |
1952 |
Dam Length |
600 |
Dam Height |
30 |
River Or Stream |
ROCK CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
356 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Missouri River Near Landusky Mt
|
9100cfs |
Peoples Creek Near Hays Mt
|
4cfs |
Milk River Near Dodson Mt
|
68cfs |
Milk River Near Harlem Mt
|
69cfs |
Milk River At Malta Mt
|
0cfs |
Judith River Nr Mouth
|
368cfs |
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 |
|---|---|---|
Montana Gulch
|
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MONTANA GULCH CAMPGROUND
|
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CAMP CREEK CAMPGROUND
|
||
Camp Creek
|
Lazy J-D #1