Sand Mesa No. 2 Reservoir Report
Nearby: Sand Mesa No. 1 Lake Cameahwait
Last Updated: December 5, 2025
Located in Fremont County, Wyoming, Sand Mesa No.
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Summary
2 is a Federal-owned Earth dam completed in 1977 for the primary purpose of serving as a Fish and Wildlife Pond. With a dam height of 11 feet and a hydraulic height of 9 feet, this structure has a capacity of 796 acre-feet and a normal storage of 268 acre-feet. The reservoir covers an area of 88 acres and has a drainage area of 3.6 square miles, with a maximum discharge capacity of 310 cubic feet per second.
Maintained by the Sacramento District of the US Army Corps of Engineers, Sand Mesa No. 2 is regulated by the State of Wyoming through the SEO agency. Despite being classified as having a low hazard potential, the dam is assessed to be in fair condition as of its last inspection in April 2018. With one other controlled outlet gate and an uncontrolled spillway, this structure plays a vital role in supporting the local fish and wildlife population while also providing important water resource management benefits in the region.
For water resource and climate enthusiasts, Sand Mesa No. 2 stands as a testament to the importance of sustainable infrastructure for environmental conservation and water management. Its presence along the Sand Mesa Drain not only contributes to the local ecosystem but also showcases the collaborative efforts between federal and state agencies in ensuring the safety and functionality of such critical water structures. As climate change continues to pose challenges to water resources, the maintenance and regulation of dams like Sand Mesa No. 2 become increasingly crucial for mitigating risks and promoting resilience in the face of evolving environmental conditions.
Year Completed |
1977 |
Dam Length |
2400 |
Dam Height |
11 |
River Or Stream |
SAND MESA DRAIN |
Primary Dam Type |
Earth |
Surface Area |
88 |
Hydraulic Height |
9 |
Drainage Area |
3.6 |
Nid Storage |
796 |
Structural Height |
15 |
Outlet Gates |
Other Controlled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wind R Bl Boysen Res Wyo
|
819cfs |
Fivemile Creek Near Shoshoni
|
83cfs |
Wind River Ab Boysen Reservoir
|
535cfs |
Wind River At Riverton
|
366cfs |
Little Wind River Near Riverton
|
142cfs |
Wind River Near Kinnear
|
358cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Tough Creek Campground
|
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Lake Cameahwait - USBR
|
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Boysen State Park
|
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Shoshoni City Park
|
Sand Mesa No. 2