Thompson Lake Dam dam
Thompson Lake Dam
Thompson Lake Dam, located in Acworth, Georgia, is a private earth dam primarily used for recreation. Built in 1979 by the Natural Resources Conservation Service, this dam stands at a height of 34.7 feet and has a hydraulic height of 29.6 feet. With a storage capacity of 141.4 acre-feet and a surface area of 8 acres, Thompson Lake Dam serves as a popular spot for water resource and climate enthusiasts to enjoy various recreational activities.
Despite being classified as having a low hazard potential and a moderate risk assessment rating, Thompson Lake Dam has not been rated for its condition assessment. The dam's inspection frequency is every 5 years, with the last inspection conducted in February 2019. While it does not have a state regulatory agency overseeing its operations, the dam is under state jurisdiction and is subject to regular inspections. With its uncontrolled spillway type and outlet gates, Thompson Lake Dam continues to provide a safe and enjoyable environment for those who visit this picturesque water resource in Cherokee County, Georgia.
Dam data reference
Condition Assessment
- Satisfactory
- No 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.
- 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.
- 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.
Hazard Potential Classification
- High
- Dams 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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Thompson Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Noonday Creek At Shallowford Road | 13 cfs | → |
| Noonday Creek At Hawkins Store Rd | 7 cfs | → |
| Etowah River At Allatoona Dam | 344 cfs | → |
| Etowah River At Ga 61 | 416 cfs | → |
| Etowah River At Canton | 357 cfs | → |
| Sope Creek Near Marietta | 11 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Thompson Lake Dam.
Boat launches
- Overlook Drive 1 163, 30102
- North Main Street Southeast Bartow County
- Gayle Drive Southeast Bartow County
- State Highway 20 Spur Southeast 1121, Cartersville
- Johnson Ferry Road Southeast Sandy Springs
- Riveredge Lane Northwest Sandy Springs
Campgrounds
- Payne - Allatoona Lake
- Clark Creek North - Allatoona Lake
- Clark Creek South - Allatoona Lake
- Victoria - Allatoona Lake
- Mckinney - Allatoona Lake
- Old Hwy 41 - Allatoona Lake
Fishing spots
Track Thompson Lake Dam in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Thompson Lake Dam
Where does the data for Thompson Lake Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Thompson Lake Dam.