East Weta 1 (Nid) Reservoir Report
Last Updated: December 6, 2025
East Weta 1 (Nid) is a federal-owned earth dam located in Wamblee, South Dakota, with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Completed in 1937 by the USDA Forest Service, this dam has a height of 16 feet and a storage capacity of 58 acre-feet. Situated on Dry Draw, the dam serves multiple purposes including fire protection and creating a habitat for fish and wildlife.
Despite its low hazard potential, East Weta 1 (Nid) has a moderate risk assessment rating of 3 due to its age and lack of recent condition assessments. The dam has not been inspected since October 2006 and is currently not rated for its condition. While it does not have an Emergency Action Plan (EAP) in place, the dam is under the jurisdiction of the USDA Forest Service for regulation, inspection, and operations.
Water resource and climate enthusiasts will be intrigued by the historical significance and functional diversity of East Weta 1 (Nid). With its location in a rural area and the potential for environmental impact, the dam presents an opportunity for further study and monitoring to ensure its continued safety and effectiveness in serving the community and ecosystem.
Year Completed |
1937 |
Dam Length |
690 |
Dam Height |
16 |
River Or Stream |
DRY DRAW |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
58 |
Structural Height |
16 |
Hazard Potential |
Low |
Nid Height |
16 |
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.
East Weta 1 (Nid)