Allerdings No.1 Reservoir Report
Nearby: Tom Hauk No.1 Albert Kulm
Last Updated: December 13, 2025
Allerdings No.1, also known as Rc&D Ca-13f-Wl, is a local government-owned earth dam located in Walworth, South Dakota.
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Summary
Constructed by the USDA NRCS in 1985, this dam stands at a height of 26 feet and has a length of 467 feet. It serves the primary purpose of water resource management on TR-Pero Creek, with a maximum storage capacity of 45 acre-feet and a normal storage capacity of 28 acre-feet.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Allerdings No.1 is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. With a low hazard potential and a moderate risk assessment rating, this dam plays a crucial role in flood control and water supply for the local community. Water resource and climate enthusiasts can appreciate the significance of this structure in managing water resources in the region and mitigating potential risks associated with its operation.
Despite being labeled as "Not Rated" in terms of condition assessment, Allerdings No.1 remains an essential infrastructure for water management in the area, supported by the St. Paul District of the US Army Corps of Engineers. As water resource and climate enthusiasts continue to monitor and advocate for sustainable water management practices, understanding the role and management of dams like Allerdings No.1 is crucial for ensuring the resilience of water resources in the face of changing climatic conditions.
Year Completed |
1985 |
Dam Length |
467 |
Dam Height |
26 |
River Or Stream |
TR-PERO CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
26 |
Drainage Area |
1 |
Nid Storage |
45 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oak Cr Near Wakpala Sd
|
10cfs |
Moreau R Near Whitehorse Sd
|
35cfs |
Grand R At Little Eagle Sd
|
47cfs |
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.
Allerdings No.1