Summary
This earth dam was completed in 1939 and stands at a height of 20 feet, with a storage capacity of 196 acre-feet. The dam plays a vital role in regulating the flow of the Tributary Marsh Creek, with a maximum discharge rate of 1922 cubic feet per second.
Despite its low hazard potential, Bancroft is subject to regular inspections and oversight by the South Dakota regulatory agency, DANR. The dam's risk assessment is rated as moderate, emphasizing the importance of risk management measures to ensure the safety and stability of the structure. The dam's spillway, with a width of 46 feet, is uncontrolled, highlighting the need for careful monitoring and maintenance to prevent potential flooding events.
Water resource and climate enthusiasts will be intrigued by Bancroft's historical significance and its role in water management in the region. The dam's location and design make it a critical piece of infrastructure for controlling water flow and storage in the area. With its earth construction and stone core, Bancroft stands as a testament to the engineering practices of the past and serves as a reminder of the ongoing need for monitoring and maintenance to protect against potential risks and ensure the safety of surrounding communities.
Year Completed |
1939 |
Dam Length |
270 |
Dam Height |
20 |
River Or Stream |
TRIB. MARSH CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Drainage Area |
5 |
Nid Storage |
196 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
James R At Huron Sd
|
548cfs |
Big Sioux R Near Castlewood Sd
|
68cfs |
James R Near Forestburg Sd
|
560cfs |
Big Sioux River Near Bruce
|
280cfs |
Big Sioux R At Watertown Sd
|
26cfs |
Big Sioux R Near Watertown Sd
|
19cfs |
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.
Bancroft