South Wall No. 3 Reservoir Report
Nearby: South Wall Big V
Last Updated: December 13, 2025
South Wall No.
°F
°F
mph
Wind
%
Humidity
Summary
3, located in Natrona, Wyoming, is a privately owned earth dam designed by Frank S. Knittle for irrigation purposes. Completed in 1951, this dam stands at a height of 25 feet and has a hydraulic height of 20 feet, providing a storage capacity of 50 acre-feet. The dam, situated on South Wall No. 3 Draw, serves the local community of Arvada by regulating water flow for irrigation needs.
With a low hazard potential and fair condition assessment, South Wall No. 3 is regularly inspected by the Wyoming State Regulatory Agency, State Engineer's Office. The dam features an uncontrolled spillway with a width of 20 feet and an outlet gate for water release. Despite being categorized as having a moderate risk level, the dam's risk management measures and emergency preparedness protocols are currently not specified in the data. Overall, South Wall No. 3 plays a crucial role in water resource management and agricultural sustainability in the region, showcasing the importance of maintaining and monitoring such critical infrastructure in the face of changing climate patterns.
Year Completed |
1951 |
Dam Length |
420 |
Dam Height |
25 |
River Or Stream |
SOUTHWALL NO 3 DRAW |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
20 |
Nid Storage |
50 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
South Wall No. 3