Golden Gate Dam Reservoir Report
Nearby: Brave Warrior Dam Thretening Times
Last Updated: January 12, 2026
The Golden Gate Dam, situated in Montana's Blaine County, is a gravity-type structure managed by the Bureau of Land Management.
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Summary
This federal agency oversees the dam's operations, funding, design, construction, regulation, and inspection, emphasizing its critical role in flood risk reduction along the unnamed drainage it controls. With a hydraulic height of 11 feet and a structural height of 16 feet, the dam boasts a maximum storage capacity of 73.2 acre-feet and a normal storage level of 8.4 acre-feet, covering a surface area of 14.08 acres.
Despite its low hazard potential, the Golden Gate Dam has a moderate risk assessment rating, suggesting the need for ongoing monitoring and management. The dam features an uncontrolled spillway of 4 feet in width and has not undergone recent modifications or conditional assessments. Although the dam's condition is currently unrated, its last inspection in September 2018 highlighted its operational reliability. As a key component in the region's flood risk reduction strategy, the Golden Gate Dam embodies the intersection of water resource management, climate resilience, and federal stewardship in safeguarding communities against natural disasters.
Dam Length |
517 |
River Or Stream |
UNNAMED DRAINAGE |
Primary Dam Type |
Gravity |
Surface Area |
14.08 |
Hydraulic Height |
11 |
Drainage Area |
10 |
Nid Storage |
73.2 |
Structural Height |
16 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
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.
Golden Gate Dam