Drew #1 Reservoir Report
Nearby: Blue Drew #1 Emma #1
Last Updated: December 6, 2025
Drew #1 is a privately owned Earth dam located in Garfield, Montana, with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Built in 1966 by the USDA NRCS, this dam stands at a height of 20 feet and has a length of 304 feet, providing a storage capacity of 117 acre-feet. Situated on the TR-SAND CREEK, the dam is regulated by the DNRC and falls under state jurisdiction for permitting, inspection, and enforcement.
Despite its low hazard potential, Drew #1 poses a moderate risk with a risk assessment rating of 3. The dam features an uncontrolled spillway with a width of 52 feet and a maximum discharge capacity of 260 cubic feet per second. The surrounding area has a drainage area of 1.01 square miles, making it crucial for fire protection and water storage purposes. However, the dam's condition assessment is currently not rated, and there is no recent inspection data available.
For water resource and climate enthusiasts, Drew #1 serves as a vital structure for maintaining water supply, supporting wildlife, and protecting against potential hazards. With its strategic location and design, this dam plays a crucial role in managing water resources in the region. As efforts to assess and manage risks associated with the dam continue, it remains a key component of the local ecosystem and a significant asset for the community.
Year Completed |
1966 |
Dam Length |
304 |
Dam Height |
20 |
River Or Stream |
TR-SAND CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Drainage Area |
1.01 |
Nid Storage |
117 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Drew #1