Calpet Cell #9 Reservoir Report
Nearby: Calpet Cell #7 Calpet Cell #8
Last Updated: December 13, 2025
Calpet Cell #9 is a private earth dam located in Sublette, Wyoming, along Dry Pine Creek.
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Summary
Built in 2008 and designed by Gareth Powell, this dam stands at a height of 47 feet with a hydraulic height of 44 feet. With a storage capacity of 341 acre-feet, the dam serves various purposes beyond flood control, such as irrigation, recreation, and water supply. Despite being classified as having a low hazard potential, the dam is regularly inspected and maintained to ensure its structural integrity and safety.
Situated in a picturesque area near HWY 189, Calpet Cell #9 offers a serene location for water resource and climate enthusiasts to explore. With a fair condition assessment and a risk assessment rating of "High (2)," the dam presents an interesting case study for those interested in the management of water infrastructure in the face of changing climate conditions. Although the dam lacks a spillway and outlet gates, it is designed to effectively manage water flow while minimizing the risk of flooding and other potential hazards.
As part of the state-regulated water infrastructure in Wyoming, Calpet Cell #9 plays a crucial role in the local ecosystem and community. With Liz Cheney (R) representing the area in Congressional District 00, the dam's operations and maintenance are overseen by the Wyoming State Engineer's Office. Despite its relatively small surface area of 13 acres, the dam's impact on the surrounding environment and water resources is significant, making it a valuable asset for studying the intersection of water management, climate resilience, and infrastructure sustainability.
Year Completed |
2008 |
Dam Length |
3150 |
Dam Height |
47 |
River Or Stream |
DRY PINE CREEK |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
44 |
Nid Storage |
341 |
Structural Height |
47 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Green River Near La Barge
|
681cfs |
New Fork River Near Big Piney
|
295cfs |
Fontenelle C Nr Herschler Ranch
|
33cfs |
Green River Below Fontenelle Reservoir
|
882cfs |
Hams Fork Below Pole Creek
|
6cfs |
Smiths Fork Near Border
|
68cfs |
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.
Calpet Cell #9