Summary
Built in 1969, this structure stands at 19 feet high and spans 700 feet in length, providing a storage capacity of 150 acre-feet. The dam is regulated by the South Dakota Department of Environment and Natural Resources and is inspected and enforced by state authorities to ensure its safety and compliance with regulations.
Despite its low hazard potential, Blair #3 has not been formally rated for its condition assessment. Emergency action plans and risk assessment measures have not been fully developed or updated for this dam, raising concerns about the preparedness for potential emergencies. The dam's primary purpose and specific uses are not specified in the data, but its location along the Cheyenne River highlights its significance in water resource management for the region.
With a maximum discharge capacity of 2500 cubic feet per second, Blair #3 plays a vital role in regulating water flow along the Cheyenne River and providing water storage for various purposes. The dam's association with the Natural Resources Conservation Service underscores its importance in sustainable water resource management. As water resource and climate enthusiasts, it is crucial to monitor and assess the condition and safety of dams like Blair #3 to ensure the resilience and effectiveness of our water infrastructure in the face of changing climate patterns.
Year Completed |
1969 |
Dam Length |
700 |
Dam Height |
19 |
River Or Stream |
TR-CHEYENNE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
150 |
Hazard Potential |
Low |
Nid Height |
19 |
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.
Blair #3