Chace No. 1 Reservoir Report
Nearby: Irene Hanna Pilot Reservoir
Last Updated: December 5, 2025
Chace No.
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Summary
1, located in Carbon County, Wyoming, is a private irrigation dam constructed in 1955 on the Carbon Dry Creek. With a height of 21 feet and a length of 420 feet, this earth dam serves the primary purpose of irrigation, providing a storage capacity of 134 acre-feet. Despite its low hazard potential, the dam is currently assessed as being in poor condition, prompting the need for regular inspections and maintenance.
Owned privately and regulated by the State Engineer's Office, Chace No. 1 features an uncontrolled spillway and a single valve outlet gate. The dam's risk assessment is classified as moderate, indicating a need for ongoing risk management measures. The surrounding area is at a low risk of inundation, but the dam's condition assessment is a cause for concern, highlighting the importance of ensuring its structural integrity for the safety of downstream communities and the sustainability of local water resources.
Located in a picturesque setting in the Alcova area, Chace No. 1 stands as a testament to Wyoming's agricultural heritage and the critical role of water infrastructure in supporting rural communities. As water resource and climate enthusiasts, it is essential to monitor and advocate for the maintenance and improvement of dams like Chace No. 1 to ensure the responsible management of water resources and the resilience of our infrastructure in the face of a changing climate.
Year Completed |
1955 |
Dam Length |
420 |
Dam Height |
21 |
River Or Stream |
CARBON DRY CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
15 |
Nid Storage |
134 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
21 |
Seasonal Comparison
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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.
Chace No. 1