Simmons #2 Reservoir Report
Nearby: Simmons Dettwiller
Last Updated: December 10, 2025
Simmons #2 is a private earth dam located in Dickson, Tennessee, with a structural height of 35 feet and a storage capacity of 84 acre-feet.
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Summary
Situated on the TRIBCULVERT BRANCH, this dam has a significant hazard potential and a moderate risk assessment rating. Despite being unregulated by the state and lacking inspection and enforcement measures, Simmons #2 remains a notable structure within the Nashville District.
While the dam's condition assessment is marked as "Not Rated," its last inspection date was recorded in January 2016 with a scheduled inspection frequency of 5 years. The dam features an uncontrolled spillway type and no outlet gates, posing potential challenges in managing excess water flow. With the risk assessment categorized as moderate and a lack of defined risk management measures, water resource and climate enthusiasts may find Simmons #2 an intriguing subject for further study and analysis in the realm of dam safety and resilience planning.
River Or Stream |
TRIBCULVERT BRANCH |
Primary Dam Type |
Earth |
Surface Area |
6 |
Nid Storage |
84 |
Structural Height |
35 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Piney River At Vernon
|
99cfs |
Duck River Above Hurricane Mills
|
2450cfs |
Yellow Creek At Ellis Mills
|
39cfs |
Duck River At Hwy 100 At Centerville
|
1900cfs |
Buffalo River Below Lobelville
|
552cfs |
Harpeth River Near Kingston Springs
|
425cfs |
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.
Simmons #2