Upper Twin Lakes Dam dam
Upper Twin Lakes Dam
Upper Twin Lakes Dam in Georgia is a privately owned structure primarily used for recreational purposes. The dam, constructed of earth and stone, stands at a height of 24 feet and has a maximum storage capacity of 120 acre-feet. With a normal storage level of 75 acre-feet, the dam covers a surface area of 10 acres and has an uncontrolled spillway system in place.
Although the dam is classified as having a low hazard potential, it is regularly inspected every 5 years to ensure its structural integrity. The last inspection took place in September 2018, and its condition is currently listed as "Not Rated." Despite its moderate risk assessment level, there are no specific risk management measures or emergency action plans in place for Upper Twin Lakes Dam as of the latest available data. Water resource and climate enthusiasts may find this dam an interesting feature to study in the context of Georgia's water infrastructure.
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 Lakes Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellow River At Gees Mill Road | 96 cfs | → |
| Big Haynes Creek At Bald Rock Road | 17 cfs | → |
| Honey Creek At Ga 212 | 8 cfs | → |
| Big Haynes Creek At Jack Turner Dam | 23 cfs | → |
| Little Haynes Creek At Dial Mill Rd Nr Milstead Ga | 9 cfs | → |
| South River At Klondike Road | 108 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper Twin Lakes Dam.
Boat launches
- Lakeshore Drive Henry County
- Ellis Road Jasper County
- Ccc Camp Loop Morgan County
- Wise Creek Tail Jasper County
- Chattahochee River Park Peachtree Corners
- Saint Ives Country Club Parkway Johns Creek
Campgrounds
- Stone Mountain Campground
- Newton Factory Shoals Rec Area
- Stone Mountain Park Campground
- Hard Labor Creek State Park
- Camp Rutledge
- Indian Springs State Park
Fishing spots
- Davidson Mountain Nature Preserve
- Black Shoals Lake
- Parkers Lake
- Chapel Hill Park
- Lake To-Lani
- Avondale Lake
Track Upper Twin Lakes 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 Lakes Dam
Where does the data for Upper Twin Lakes 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 Lakes Dam.