Hannah Lake Dam dam
Hannah Lake Dam
Hannah Lake Dam, located in Gilmer, Georgia, is a privately-owned Earth dam with a height of 21 feet and a length of 210 feet. The dam has a maximum storage capacity of 73 acre-feet and a normal storage capacity of 37 acre-feet, with a surface area of 6 acres. Despite being unregulated by the state and having a low hazard potential, the dam is classified as having a moderate risk level.
The dam features an uncontrolled spillway and outlet gates, posing a potential risk to the surrounding area in the event of a breach or overflow. The last inspection of Hannah Lake Dam was conducted in 2008, and its condition is currently marked as "Not Rated." With no Emergency Action Plan (EAP) in place and limited risk management measures identified, there are concerns about the dam's readiness to handle emergencies or unforeseen events.
Water resource and climate enthusiasts may be interested in monitoring the maintenance and risk assessment updates for Hannah Lake Dam, as its current risk level and lack of regulatory oversight raise questions about its long-term viability and safety. With its location in a scenic area of Georgia, understanding the potential implications of the dam's condition and the need for improved risk management measures is crucial for ensuring the protection of both the environment and nearby communities.
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 Hannah Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Coosawattee River Near Ellijay | 251 cfs | → |
| Coosawattee River At Carters | 233 cfs | → |
| Cartecay River Near Ellijay | 144 cfs | → |
| Holly Creek Near Chatsworth | 26 cfs | → |
| Fausett Creek Near Talking Rock | 4 cfs | → |
| Talking Rock Creek Near Hinton | 61 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hannah Lake Dam.
Boat launches
Campgrounds
- Ridgeway - Carters Lake
- Woodring Branch - Carters Lake
- Doll Mountain - Carters Lake
- Harris Branch - Carters Lake
- Backcountry Campsite #2
- Fort Mountain State Park
Fishing spots
Paddle runs
- Source In Cohutta Wilderness To Nf Boundary North Of Murray's Lake
- Southern Boundary Cohutta Wilderness Near Peter Cove To Northern Boundary Cohutta Wilderness Near Alaculsy
- Northern Boundary Cohutta Wilderness To Confluence With Conasauga River
- Nf Boundary To Taylor's Creek In Cherokee Nf (Tn)
- Taylors Creek (Rm 74.5) To Nf Boundary (Rm 70.0)
- Apalachia Powerhouse (Rm 53.5) To Us411 Bridge (Rm 43.0)
Track Hannah 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 Hannah Lake Dam
Where does the data for Hannah 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 Hannah Lake Dam.