Curran-Barrett #2 Reservoir Report

Last Updated: December 5, 2025

Curran-Barrett #2 is a historic earth dam located in Lewis and Clark County, Montana, along the Rock Creek river.


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Summary

Built in 1899 for irrigation purposes, this privately-owned structure stands at a height of 20 feet and has a storage capacity of 314 acre-feet. With its low hazard potential, the dam is regulated by the Montana Department of Natural Resources and Conservation, ensuring that it meets state inspection and enforcement standards.

Although the dam's condition assessment is currently listed as "Not Rated," its primary purpose of irrigation highlights its significance in sustaining water resources in the region. The dam's location in the scenic town of Craig, Montana, adds to its appeal for water resource and climate enthusiasts interested in the intersection of infrastructure and environmental conservation. With a distance of 7 miles from the city, Curran-Barrett #2 serves as a reminder of the rich history of water management in the area.

As a part of the Walla Walla District in Montana, Curran-Barrett #2 offers a glimpse into the engineering feats of the past while also raising questions about the future of water resource management in a changing climate. Its association with the Rock Creek river and its role in supporting agricultural activities in the region make it a valuable asset that warrants ongoing monitoring and maintenance to ensure its continued functionality.

Year Completed

1899

Dam Length

150

Dam Height

20

River Or Stream

ROCK CREEK

Primary Dam Type

Earth

Hydraulic Height

20

Nid Storage

314

Hazard Potential

Low

Nid Height

20
       
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.