Pioneer #4 Reservoir Report
Nearby: Pioneer #3 Pioneer #5
Last Updated: December 5, 2025
Pioneer #4 is a privately owned earth dam located on the Forked Deer River in Dyer, Tennessee.
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Summary
Completed in 1945, this dam stands at a structural height of 15 feet with a hydraulic height of 12.2 feet. With a storage capacity of 107 acre-feet and a normal storage of 84 acre-feet, it covers a surface area of 11.2 acres and drains an area of 0.16 square miles.
The dam is regulated by the Tennessee Safe Dams Program and undergoes regular inspections, with the last assessment conducted in July 2020 rating its condition as satisfactory. Despite its high hazard potential, the risk assessment for Pioneer #4 is moderate, indicating a level 3 risk. The dam features an uncontrolled spillway and lacks outlet gates, posing a potential challenge in emergency situations.
Located in the Memphis District, Pioneer #4 serves as a critical infrastructure for water resource management in the region. Its presence on the Forked Deer River contributes to the overall hydrological landscape and highlights the importance of maintaining and monitoring such structures to ensure public safety and environmental protection in the face of changing climatic conditions.
Year Completed |
1945 |
Dam Length |
450 |
River Or Stream |
FORKED DEER RIVER |
Primary Dam Type |
Earth |
Surface Area |
11.2 |
Hydraulic Height |
12.2 |
Drainage Area |
0.16 |
Nid Storage |
107 |
Structural Height |
15 |
Outlet Gates |
None |
Hazard Potential |
High |
Nid Height |
15 |
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.
Pioneer #4