Second Creek Ws Str No. 11 Dam Reservoir Report
Last Updated: December 5, 2025
Second Creek WS Str No.
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Summary
11 Dam, also known as Johns-Manville Corp Dam, is located in Fort Adams, Mississippi, along Lynn Creek. This Earth-type dam was completed in 1968 with a height of 36 feet, serving primarily for flood risk reduction purposes. The dam is owned by the local government and regulated by the Mississippi Department of Environmental Quality, ensuring that it meets state inspection and enforcement standards.
Despite its low hazard potential and satisfactory condition assessment, the dam has a moderate risk rating of 3. It has uncontrolled spillways and outlet gates, with no associated structures or locks. The dam's drainage area is 4.63 square miles, with a storage capacity of 1962 acre-feet. The USDA NRCS designed the dam, and it falls under the jurisdiction of the New Orleans District of the US Army Corps of Engineers.
With its history dating back to the 1960s, Second Creek WS Str No. 11 Dam remains a vital infrastructure for managing flood risks in the area. Climate and water resource enthusiasts will appreciate its contribution to local water management efforts and its role in protecting the surrounding communities from potential flooding events.
Year Completed |
1968 |
Dam Height |
36 |
River Or Stream |
LYNN CREEK |
Primary Dam Type |
Earth |
Drainage Area |
4.63 |
Nid Storage |
1962 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Buffalo River Nr Woodville
|
257cfs |
Homochitto River At Rosetta
|
2130cfs |
Homochitto River At Eddiceton
|
168cfs |
(Coe) Atchafalaya River At Simmesport
|
105000cfs |
Amite River Near Darlington
|
267cfs |
Bayou Des Glaises Diversion Ch. At Moreauville
|
884cfs |
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.
Second Creek Ws Str No. 11 Dam