Lazy Jackson Reservoir Report

Last Updated: December 5, 2025

Lazy Jackson is a private earth dam located in Beaverhead, Montana, along Englebaugh Creek.


°F

°F

mph

Wind

%

Humidity

Summary

Built in 1950 for recreational purposes, the dam stands at 10 feet high with a storage capacity of 226 acre-feet. While its hazard potential is rated low, the dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with state oversight for permitting, inspection, and enforcement.

Situated in Congressional District 00, Montana, Lazy Jackson is owned by a private entity and is not federally funded or operated. The dam's primary purpose is for recreation, offering opportunities for fishing, boating, and other water-based activities. With a relatively small footprint, Lazy Jackson serves as a popular local attraction in the area.

Despite its age and lack of recent inspection data, Lazy Jackson remains a beloved feature of the landscape, providing both leisure and scenic beauty to residents and visitors alike. As a low-hazard dam, it continues to contribute positively to the surrounding environment and community, showcasing the importance of responsible water resource management in the face of changing climate conditions.

Year Completed

1950

Dam Length

50

Dam Height

10

River Or Stream

ENGLEBAUGH CREEK

Primary Dam Type

Earth

Hydraulic Height

7

Nid Storage

226

Hazard Potential

Low

Nid Height

10
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.