Monterey City Lake Reservoir Report
Nearby: Jimmy Walker Wright
Last Updated: December 7, 2025
Monterey City Lake in Putnam, Tennessee, is a concrete dam constructed in 1963 on Garrison Branch.
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Summary
Managed by the local government, this dam stands at a structural height of 29.9 feet with a hydraulic height of 28.6 feet and a NID height of 30 feet. The reservoir has a storage capacity of 215 acre-feet, with a normal storage level of 200 acre-feet, covering a surface area of 13.8 acres and draining an area of 3.4 square miles.
Despite its satisfactory condition assessment as of September 2020, Monterey City Lake poses a significant hazard potential and is classified as having a moderate risk level. The dam's spillway type is uncontrolled, with no outlet gates, and it has an inspection frequency of every two years. The Tennessee Safe Dams Program regulates the state jurisdiction of this dam, ensuring state permitting, inspection, and enforcement to maintain its safety standards. The risk management measures and emergency preparedness of this structure are currently unspecified, warranting further attention from water resource and climate enthusiasts to ensure the lake's continued safety and functionality.
Year Completed |
1963 |
Dam Length |
221 |
River Or Stream |
GARRISON BRANCH |
Primary Dam Type |
Concrete |
Surface Area |
13.8 |
Hydraulic Height |
28.6 |
Drainage Area |
3.4 |
Nid Storage |
215 |
Structural Height |
29.9 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
30 |
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.
Monterey City Lake
U.S. 127 Bridge To Morgan County Line