N. Overdahl Reservoir Report
Nearby: T. Mason P. Lorang Grazing Assn
Last Updated: December 6, 2025
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Summary
Overdahl is a private earth dam located in Meade, South Dakota, along the TR CHEYENNE river. Completed in 1945, this dam stands at a height of 13 feet and has a storage capacity of 78 acre-feet. With a low hazard potential and a condition assessment of "Not Rated," N. Overdahl is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and is subject to state jurisdiction, permitting, inspection, and enforcement.
The dam, which falls under the St. Paul District of the US Army Corps of Engineers, has not been modified over the years and does not have an Emergency Action Plan (EAP) in place. While it has a maximum discharge capacity of 2400 cubic feet per second, the dam's spillway type and width are not specified. Despite its unassessed condition, N. Overdahl serves as a critical structure for water resource management in the region, contributing to flood control and water storage for the surrounding area.
As a significant component of the local water infrastructure, N. Overdahl plays a vital role in the management and conservation of water resources in Meade County, South Dakota. Its presence ensures a reliable supply of water for various purposes while also helping to mitigate the risk of flooding in the area. With its regulated status and state oversight, N. Overdahl remains a key asset in the region's efforts to sustainably manage water resources and address the challenges posed by climate change.
Year Completed |
1945 |
Dam Length |
670 |
Dam Height |
13 |
River Or Stream |
TR CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
13 |
Nid Storage |
78 |
Hazard Potential |
Low |
Nid Height |
13 |
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.
N. Overdahl