Roy Shull No.1 Reservoir Report
Nearby: Glen Lakner Percy Dam
Last Updated: December 6, 2025
Roy Shull No.1 is a privately owned dam located in Pennington, South Dakota, along the TR-CHEYENNE river.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1957 by the Natural Resources Conservation Service, this earth dam stands at 31 feet tall and spans 170 feet in length, with a storage capacity of 60 acre-feet. Despite being regulated by the South Dakota Department of Environment and Natural Resources, the dam is currently rated as 'Not Rated' in terms of condition assessment, with a low hazard potential.
The dam's primary purpose and specific design features are not explicitly stated in the data, but it is noted that it is subject to state permitting, inspection, and enforcement. The dam's location along the TR-CHEYENNE river suggests its significance in managing water resources in the area, with a maximum discharge capacity of 315 cfs. Given its age and the lack of recent inspection data, it is essential for water resource and climate enthusiasts to monitor the condition and regulatory status of Roy Shull No.1 to ensure its continued safety and effectiveness in water management.
In conclusion, Roy Shull No.1 serves as a key infrastructure for water resource management in South Dakota, providing storage capacity and flood control along the TR-CHEYENNE river. As a privately owned dam with state regulatory oversight, its condition and maintenance are crucial for ensuring public safety and environmental sustainability. Continued monitoring and assessment of this dam by relevant authorities and stakeholders are essential to mitigate potential risks and preserve its functionality for the future.
Year Completed |
1957 |
Dam Length |
170 |
Dam Height |
31 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
31 |
Nid Storage |
60 |
Hazard Potential |
Low |
Nid Height |
31 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Sage Creek
|
||
Sage Creek Campground
|
||
Buffalo gap national grassland
|
Roy Shull No.1