Tailings Pond No. 4 Main Dam Reservoir Report
Last Updated: December 13, 2025
Tailings Pond No.
°F
°F
mph
Wind
%
Humidity
Summary
4 Main Dam, also known as Stevens Draw, is a privately owned earth dam located in Sweetwater, Wyoming. Built in 1992 by designer Phillip B. Solseng, this dam serves primarily for irrigation purposes along the Stevens Draw river. With a structural height of 110 feet and a hydraulic height of 65 feet, it stands as a significant and crucial structure in the region.
Covering a surface area of 239 acres and with a drainage area of 4.1 square miles, Tailings Pond No. 4 Main Dam has a storage capacity of 4612 acre-feet. The dam has an uncontrolled spillway type with a width of 75 feet, and while it holds a hazard potential of "Significant," it has been rated with a moderate risk level. Regular inspections and state regulation ensure its safety, with the last assessment conducted in June 2020. Despite its remote location, this dam plays a vital role in managing water resources in the area, highlighting the intersection of water management and climate considerations in its design and operation.
Year Completed |
1992 |
Dam Length |
1840 |
Dam Height |
70 |
River Or Stream |
STEVENS DRAW |
Primary Dam Type |
Earth |
Surface Area |
239 |
Hydraulic Height |
65 |
Drainage Area |
4.1 |
Nid Storage |
4612 |
Structural Height |
110 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
110 |
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.
Tailings Pond No. 4 Main Dam