Hogan's Lake Dam dam
Hogan's Lake Dam
Hogan's Lake Dam in Gwinnett, Georgia, is a private dam primarily used for recreation. Standing at 32 feet high with a hydraulic height of 24 feet, this earth dam with a buttress core type holds a normal storage capacity of 55 acre-feet and a maximum storage of 170.3 acre-feet. The dam spans 555 feet in length and covers 8 acres of surface area, with a drainage area of 73 acres.
Despite its recreational purpose, Hogan's Lake Dam poses a high hazard potential and is currently assessed as being in poor condition as of the last inspection in February 2016. The dam is uncontrolled, with no outlet gates or spillway width specified. It falls under the jurisdiction of the Georgia Safe Dams Program for regulation, permitting, inspection, and enforcement. With a moderate risk assessment rating of 3, there are no specific risk management measures or emergency action plans in place for the dam.
For water resource and climate enthusiasts, Hogan's Lake Dam presents an intriguing case study of a privately-owned recreational structure with potential risks and challenges that need to be addressed to ensure the safety and sustainability of the surrounding area. The dam's design and condition raise important questions about the management and regulation of such structures, especially in the face of changing climate patterns and increasing concerns over dam safety. Monitoring and addressing the issues identified in the inspection report will be crucial for the long-term resilience of Hogan's Lake Dam and its surrounding community.
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 Hogan's Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Alcovy River Near Lawrenceville | 8 cfs | → |
| Apalachee River At Fence Road | 2 cfs | → |
| Suwanee Creek At Suwanee | 19 cfs | → |
| Alcovy River At New Hope Road | 17 cfs | → |
| Wheeler Creek At Bill Cheek Road | 1 cfs | → |
| Level Creek At Suwanee Dam Road | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hogan's Lake Dam.
Boat launches
- Saint Ives Country Club Parkway Johns Creek
- Van Pugh North Park
- Chattahochee River Park Peachtree Corners
- Kings Point Drive Forsyth County
- Lake Windward Landing 139, Alpharetta
- Browns Bridge Road Forsyth County
Campgrounds
- James Shackleford County Park
- Shoal Creek - Lake Lanier
- Chestnut Ridge - Lake Lanier
- Fort Yargo State Park
- Sawnee
- Shady Grove - Lake Lanier
Fishing spots
Track Hogan's 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 Hogan's Lake Dam
Where does the data for Hogan's 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 High 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 Hogan's Lake Dam.