Lower Crystal Lake Dam dam
Lower Crystal Lake Dam
Lower Crystal Lake Dam, also known as Lake To-Lani Dam, is a privately owned Earth dam located in DeKalb, Georgia. Built in 1954, this recreational structure stands at a height of 41 feet and spans a length of 795 feet, creating a reservoir with a storage capacity of 104 acre-feet. Situated on Snapfinger Creek, this dam serves as a popular spot for outdoor enthusiasts to enjoy activities such as fishing and boating.
Despite not being regulated by the state, Lower Crystal Lake Dam has a moderate risk assessment rating of 3, indicating a potential hazard that is currently undetermined. The dam features an uncontrolled spillway and outlet gates, adding to its charm while also posing some level of risk. With an uncertain condition assessment and no specific emergency action plan in place, the potential for unforeseen events adds an element of intrigue to this tranquil recreational haven.
Overall, Lower Crystal Lake Dam is a picturesque Earth dam nestled in the scenic surroundings of Stone Mountain, Georgia. While offering a serene escape for water and climate enthusiasts, the dam's unregulated status and moderate risk assessment hint at a mysterious edge that adds to its allure. As visitors enjoy the recreational opportunities provided by this structure, the need for vigilance and preparedness in the face of potential hazards remains an underlying theme, creating a captivating blend of beauty and uncertainty.
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 Lower Crystal Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South River At Flakes Mill Road Nr Atlanta | 168 cfs | → |
| Yellow River At Pleasant Hill Rd | 84 cfs | → |
| S.F. Peachtree Creek | 7 cfs | → |
| Yellow River At Ga 124 | 75 cfs | → |
| Intrenchment Creek Near Atlanta | 4 cfs | → |
| N.F. Peachtree Creek | 12 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lower Crystal Lake Dam.
Boat launches
- Lakeshore Drive Henry County
- Cobb Parkway South Vinings
- West Palisades Vinings
- Chattahochee River Park Peachtree Corners
- Riveredge Lane Northwest Sandy Springs
- Johnson Ferry Road Southeast Sandy Springs
Campgrounds
- Stone Mountain Park Campground
- Stone Mountain Campground
- Dobbins Lakeside Military
- James Shackleford County Park
- Sawnee
- Shoal Creek - Lake Lanier
Fishing spots
- Lake To-Lani
- Avondale Lake
- Buena Vista Lake
- Chapel Hill Park
- Davidson Mountain Nature Preserve
- Murphey Candler Park
Track Lower Crystal 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 Lower Crystal Lake Dam
Where does the data for Lower Crystal 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 Undetermined 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 Lower Crystal Lake Dam.