Upper Twin Lake Dam dam
Upper Twin Lake Dam
Upper Twin Lake Dam, located in Fulton, Georgia, was completed in 1945 with a primary purpose of recreation. This private-owned Earth dam stands at 39 feet in height and spans 876 feet in length, providing a storage capacity of 1170 acre-feet. With a surface area of 36 acres and a drainage area of 396 square miles, the dam serves as a recreational hotspot for water resource and climate enthusiasts.
Despite its low hazard potential, Upper Twin Lake Dam has not been rated for its condition assessment, with the last inspection conducted in May 2017. The dam features uncontrolled spillways and outlet gates, with a moderate risk assessment score of 3. While the dam has not been modified in recent years and does not fall under the jurisdiction of state regulation, it remains a vital component in the local water resource infrastructure.
Overall, Upper Twin Lake Dam is a significant structure in the region, offering recreational opportunities and contributing to the surrounding ecosystem. With its historical significance and moderate risk assessment, the dam serves as a point of interest for enthusiasts interested in water resources and climate management in the area.
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 Upper Twin Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Chattahoochee River Near Fairburn | 1,290 cfs | → |
| Sweetwater Creek Below Austell | 105 cfs | → |
| Utoy Creek At Great Southwest Pkwy Nr Atlanta | 10 cfs | → |
| Sweetwater Creek Near Austell | 86 cfs | → |
| Nickajack Creek At Us 78/278 | 7 cfs | → |
| Proctor Creek At Jackson Parkway | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Twin Lake Dam.
Boat launches
- Hooch Boat Ramp
- Peachtree Parkway 488, Shake Rag
- 1124 Peachtree City
- Pine Crest Drive 127, Peachtree City
- Us 27 Alternate;16 Whitesburg
- Hutcheson Ferry Road Carroll County
Campgrounds
- Cochran Mill County Park
- Dobbins Lakeside Military
- Mcintosh Reserve Park
- Chattahoochee Bend State Park
- John Tanner State Park
- Stone Mountain Park Campground
Fishing spots
- George H Sparks Reservoir
- Butternut Creek
- Lake Starling
- Jester Creek
- Gb's Lake
- Clayton County International Park
Track Upper Twin 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 Upper Twin Lake Dam
Where does the data for Upper Twin 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 Upper Twin Lake Dam.