Upper Big Spring Subws Str R-7-2 Reservoir Report
Last Updated: December 6, 2025
Located in Marshall, Mississippi, the Upper Big Spring Subws Str R-7-2, also known as Dam R-7-2, is a local government-owned structure designed by the USDA NRCS and completed in 1958.
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Summary
This earth-type dam, with a height of 25 feet and a length of 377 feet, serves the primary purpose of flood risk reduction along the TR- Big Spring Creek. It has a storage capacity of 74 acre-feet and a low hazard potential, making it a crucial asset in managing water resources in the region.
Managed and funded by the Natural Resources Conservation Service, the Upper Big Spring Subws Str R-7-2 features an uncontrolled spillway with a width of 75 feet and uncontrolled outlet gates. With a moderate risk assessment rating of 3, this dam plays a vital role in mitigating flood risks in the area. Although not state-regulated or inspected, the structure meets the guidelines for emergency action plans and is an essential component of the local water resource management system.
Climate and water resource enthusiasts will appreciate the significance of the Upper Big Spring Subws Str R-7-2 in reducing flood risks and safeguarding the surrounding communities. As part of the flood risk reduction infrastructure, this dam contributes to the overall resilience of the region against extreme weather events. With its strategic location and design, the Upper Big Spring Subws Str R-7-2 stands as a testament to the importance of effective water resource management in mitigating the impacts of climate change.
Year Completed |
1958 |
Dam Length |
377 |
Dam Height |
25 |
River Or Stream |
TR- BIG SPRING CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
25 |
Drainage Area |
0.23 |
Nid Storage |
74 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wolf River At Lagrange
|
227cfs |
Coldwater River Nr Olive Branch
|
104cfs |
Wolf River At Rossville
|
497cfs |
Little Tallahatchie River At Etta
|
156cfs |
Nonconnah Creek Near Germantown
|
88cfs |
Wolf River At Germantown
|
609cfs |
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.
Upper Big Spring Subws Str R-7-2