Darrah No. 1 Reservoir Report
Nearby: Darrah No. 2 Darrah No. 3
Last Updated: December 5, 2025
Darrah No.
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Summary
1, also known as Coe, is a privately owned irrigation dam located in Park County, Wyoming. Completed in 1914, this earth dam stands at a height of 14 feet and has a hydraulic height of 9 feet. With a storage capacity of 285 acre-feet, it primarily serves the purpose of irrigation for the surrounding area. Despite its age, the dam is regulated, inspected, and enforced by the State of Wyoming, ensuring its safety and compliance with regulations.
Although Darrah No. 1 has a low hazard potential, its condition assessment is rated as poor, indicating a need for maintenance and repairs. The last inspection in August 2018 highlighted the dam's risk management measures as high, with a risk assessment rating of 2. While the dam lacks features such as a spillway, it does have a single valve outlet gate for water release. The surrounding Middle Fork Carter Creek benefits from the dam's presence, providing crucial water resources for agriculture and local ecosystems.
As an important piece of infrastructure in the Cody area, Darrah No. 1 showcases the intersection of water resource management and climate resilience. With its historical significance and ongoing regulatory oversight, this dam serves as a reminder of the vital role that irrigation systems play in sustaining communities and ecosystems in arid regions like Wyoming. Despite its current poor condition, efforts to maintain and improve this essential water resource will be critical for its continued function and the well-being of the surrounding area.
Year Completed |
1914 |
Dam Length |
454 |
Dam Height |
14 |
River Or Stream |
MIDDLE FORK CARTER CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
9 |
Nid Storage |
285 |
Structural Height |
14 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
14 |
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.
Darrah No. 1
Meeteetse Creek
South Fork Shoshone River