Willowrun Lake Dam dam
Willowrun Lake Dam
Willowrun Lake Dam, located in Gwinnett, Georgia, is a local government-owned structure primarily used for recreation purposes. This earth dam with a buttress core stands at a height of 11 feet and has a storage capacity of 100 acre-feet. The dam has a surface area of 15 acres and serves a drainage area of 40 acres, making it a vital resource for the surrounding community.
Despite being a low hazard potential structure, Willowrun Lake Dam has a moderate risk assessment rating, indicating the need for ongoing monitoring and management. The dam has not been inspected since June 2016, with an inspection frequency of every 5 years. While the condition assessment is listed as "Not Rated," it is crucial for the local government to stay vigilant in ensuring the safety and integrity of the dam, especially considering its importance for recreation and water resource management in the area.
With its uncontrolled spillway and outlet gates, Willowrun Lake Dam plays a crucial role in managing water levels and ensuring the safety of the surrounding environment. While there are no associated structures or federal agencies involved in its ownership or management, the dam remains a key feature in the landscape of Gwinnett, Georgia, showcasing the intersection of water resource management and recreational opportunities for the 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 Willowrun Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Suwanee Creek At Suwanee | 21 cfs | → |
| Chattahoochee River Near Norcross | 1,810 cfs | → |
| N.F. Peachtree Creek At Graves Rd | 0 cfs | → |
| Crooked Creek Near Norcross | 2 cfs | → |
| Dick Creek At Old Atlanta Rd | 3 cfs | → |
| Alcovy River Near Lawrenceville | 8 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Willowrun Lake Dam.
Boat launches
- Chattahochee River Park Peachtree Corners
- Saint Ives Country Club Parkway Johns Creek
- Lake Windward Landing 139, Alpharetta
- Johnson Ferry Road Southeast Sandy Springs
- Van Pugh North Park
- Kings Point Drive Forsyth County
Campgrounds
- Stone Mountain Park Campground
- Stone Mountain Campground
- James Shackleford County Park
- Shoal Creek - Lake Lanier
- Sawnee
- Chestnut Ridge - Lake Lanier
Fishing spots
Track Willowrun 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 Willowrun Lake Dam
Where does the data for Willowrun 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 Willowrun Lake Dam.