Portland City Lake Reservoir Report
Nearby: Sumner Co Sportsmans Haynes Lake
Last Updated: December 11, 2025
Portland City Lake, located in Sumner County, Tennessee, is a vital water resource managed by the local government.
°F
°F
mph
Wind
%
Humidity
Summary
Constructed in 1945, this earth dam stands at a structural height of 34.3 feet and has a hydraulic height of 28.3 feet, providing a storage capacity of 422 acre-feet for the surrounding area. The dam overlooks the TRIBW FORK DRAKES CREEK and serves as a significant water source for the community of PEDEN MILL, boasting a surface area of 24 acres and a drainage area of 1.06 square miles.
Regulated by the Tennessee Safe Dams Program, Portland City Lake is subject to regular inspections and enforcement measures to ensure its structural integrity and safety. With a satisfactory condition assessment and a significant hazard potential, this dam is equipped with an uncontrolled spillway type. Despite being categorized as having a moderate risk level, the lake poses as a valuable resource for water supply and climate regulation in the region. As a key component of the local water infrastructure, Portland City Lake plays a crucial role in meeting the water needs of the community and supporting environmental sustainability efforts in the area.
Year Completed |
1945 |
Dam Length |
614 |
River Or Stream |
TRIBW FORK DRAKES CREEK |
Primary Dam Type |
Earth |
Surface Area |
24 |
Hydraulic Height |
28.3 |
Drainage Area |
1.06 |
Nid Storage |
422 |
Structural Height |
34.3 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
34 |
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.
Portland City Lake