Atha Dam dam
Atha Dam
Atha Dam, located in Gwinnett, Georgia, is a private earth dam completed in 1955 for primarily recreational purposes along the Tr- Yellow River. With a height of 31 feet and a length of 310 feet, the dam has a storage capacity of 65 acre-feet and a maximum discharge rate of 16 cubic feet per second. Despite being classified as having a low hazard potential, the dam is subject to moderate risk due to its age and lack of recent condition assessments.
Managed by the USDA NRCS, Atha Dam currently does not have an Emergency Action Plan in place or updated emergency contacts. The dam's spillway type is uncontrolled, with a width of 20 feet, and there are no associated locks or outlet gates. While the dam's overall risk level is moderate and its condition assessment is not available, it serves as an important recreational resource for the community of Milstead. Enthusiasts interested in water resource management and climate resilience may find Atha Dam's historical significance and operational details intriguing.
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 Atha Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Haynes Creek At Lenora Road | 9 cfs | → |
| Alcovy River Near Lawrenceville | 8 cfs | → |
| Brushy Fork Creek At Beaver Road | 3 cfs | → |
| No Business Creek At Lee Road | 2 cfs | → |
| Suwanee Creek At Suwanee | 21 cfs | → |
| Yellow River At Ga 124 | 73 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Atha Dam.
Boat launches
- Chattahochee River Park Peachtree Corners
- Saint Ives Country Club Parkway Johns Creek
- Lake Windward Landing 139, Alpharetta
- Van Pugh North Park
- Johnson Ferry Road Southeast Sandy Springs
- Kings Point Drive Forsyth County
Campgrounds
- Stone Mountain Campground
- Stone Mountain Park Campground
- James Shackleford County Park
- Shoal Creek - Lake Lanier
- Sawnee
- Fort Yargo State Park
Fishing spots
Track Atha 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 Atha Dam
Where does the data for Atha 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 Atha Dam.