Grant Creek Reservoir Report
Nearby: Johnson Two Bar No. 1
Last Updated: December 5, 2025
Grant Creek in Albany County, Wyoming, is a privately owned irrigation dam completed in 1912 with a primary purpose of irrigation.
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Summary
This Earth-type dam stands at a height of 25 feet and spans 300 feet in length, with a maximum storage capacity of 104 acre-feet. Located in Torrington, Grant Creek is regulated by the Wyoming State Engineer's Office and undergoes regular inspections, although its condition assessment is currently rated as poor.
Despite its low hazard potential, Grant Creek poses a moderate risk due to its poor condition and outdated emergency action plan. The dam's spillway, measuring 50 feet in width, is uncontrolled, raising concerns about its ability to manage high discharge levels. While the dam has not been modified in recent years, its maintenance and safety protocols may require updates to mitigate potential risks and ensure its continued functionality for irrigation purposes. Enthusiasts of water resources and climate in the area may find interest in monitoring the ongoing management and maintenance of Grant Creek to safeguard against any potential hazards and ensure the sustainability of its operations.
Year Completed |
1912 |
Dam Length |
300 |
Dam Height |
25 |
River Or Stream |
GRANT CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
20 |
Nid Storage |
104 |
Structural Height |
25 |
Outlet Gates |
Valve |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
Grant Creek