Summary
The dam, completed in 1954, stands at a height of 23 feet and has a storage capacity of 80 acre-feet, with a normal storage level of 70 acre-feet. Despite its age, the dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Horstman #1 is subject to state regulations, permitting, inspections, and enforcement. The dam is situated on TR Oak Creek Offstream and falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. Although the dam does not have associated structures and has not been modified in recent years, its maximum discharge capacity is recorded at 96 cubic feet per second.
Horstman #1 serves as a crucial component of the local water resource infrastructure, providing essential flood control and water storage capabilities in the region. Despite its age, the dam's low hazard potential and state regulatory oversight indicate a commitment to ensuring its safety and functionality for the surrounding community and environment.
Year Completed |
1954 |
Dam Length |
174 |
Dam Height |
23 |
River Or Stream |
TR OAK CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Nid Storage |
80 |
Hazard Potential |
Low |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Keya Paha R Near Keyapaha Sd
|
33cfs |
Little White R Below White River Sd
|
141cfs |
White River Near White River
|
42cfs |
Little White R Near Rosebud Sd
|
96cfs |
Keya Paha R At Wewela Sd
|
54cfs |
Niobrara River Near Sparks
|
934cfs |
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.
Horstman #1