Colwell Lake Dam No.1 Reservoir Report
Last Updated: December 5, 2025
Colwell Lake Dam No.1, also known as Arms Lake # 01 Dam, is a private earth dam located in Lamar County, Georgia, near the city of Barnesville.
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Summary
The dam serves primarily for recreation purposes, with a storage capacity of 39 acre-feet and a normal storage level of 30 acre-feet. The dam stands at a height of 28 feet with a hydraulic height of 22 feet, spanning a length of 325 feet and covering a surface area of 3.2 acres.
Despite being privately owned, Colwell Lake Dam No.1 is not regulated by the state, with no state permitting or enforcement agencies overseeing its operations. The dam has a low hazard potential and has not been rated for its condition. The last inspection took place in April 2020, with a scheduled inspection frequency of every 5 years. While the risk assessment indicates a moderate risk level, specific risk management measures have not been specified for the dam.
With its picturesque location and recreational significance, Colwell Lake Dam No.1 stands as a notable structure in the area, providing water resource and climate enthusiasts with an intriguing glimpse into the intersection of human engineering and environmental stewardship. While the dam poses a moderate level of risk, its low hazard potential and lack of state regulation may raise questions about the adequacy of oversight and emergency preparedness for this private dam in Georgia.
Dam Length |
325 |
Dam Height |
28 |
River Or Stream |
UNKNOWN |
Primary Dam Type |
Earth |
Surface Area |
3.2 |
Hydraulic Height |
22 |
Drainage Area |
60 |
Nid Storage |
39 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Shoal Creek At Shoal Creek Rd
|
17cfs |
Flint River Near Griffin
|
341cfs |
Ocmulgee River Near Jackson
|
1600cfs |
Falling Creek Near Juliette
|
21cfs |
Flint River Near Culloden
|
1240cfs |
Flint River Near Lovejoy
|
95cfs |
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.
Colwell Lake Dam No.1