Sd Noname 177 Reservoir Report
Nearby: Sd Noname 136 Sd Noname 194
Last Updated: December 5, 2025
Sd Noname 177 is a privately owned dam located in Haakon, South Dakota, along the TR-Cheyenne River.
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Summary
It was completed in 1956 and stands at a height of 15 feet with a length of 480 feet. The dam has a storage capacity of 90 acre-feet and is primarily used for water resource management in the region. Despite being regulated by the state and having state jurisdiction, the dam is categorized as having a low hazard potential and its condition assessment is currently listed as "Not Rated."
This Earth-type dam plays a crucial role in regulating the flow of the Cheyenne River and provides essential benefits to the surrounding area. It has the capacity to handle a maximum discharge of 600 cubic feet per second and has not been modified in recent years. While the dam has not been rated for its condition, it is subject to regular state inspections, permitting, and enforcement to ensure its continued safe operation. Additionally, the dam is not owned or funded by any federal agencies, further highlighting its importance within the local water resource management infrastructure.
Located in a picturesque setting in South Dakota, Sd Noname 177 stands as a testament to the importance of private ownership in water resource management. With its low hazard potential and state-regulated status, the dam serves as a vital piece of infrastructure for the region. As climate change continues to impact water resources, structures like Sd Noname 177 play a crucial role in ensuring the sustainable management of water for future generations.
Year Completed |
1956 |
Dam Length |
480 |
Dam Height |
15 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
90 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Sd Noname 177