Mathis Lake Dam dam
Mathis Lake Dam
Mathis Lake Dam, also known as Maffetts Lake Dam, is a private concrete structure located in Greenville, Georgia. Completed in 1910, this dam stands at a height of 16.5 feet and serves primarily for recreational purposes, providing a surface area of 69 acres for visitors to enjoy. Situated on Winslow Creek, the dam has a storage capacity of 552 acre-feet and is classified as having a low hazard potential with a moderate risk assessment rating.
Despite being privately owned, Mathis Lake Dam falls under state jurisdiction and is subject to regular inspections to ensure its safety and integrity. The dam features an uncontrolled spillway and outlet gates, with no associated locks for navigation. The last inspection of the dam was conducted in June 2019, with a scheduled inspection frequency of every 5 years. With its historical significance and contribution to the local recreational landscape, Mathis Lake Dam remains a notable feature in Meriwether County, Georgia, attracting water resource and climate enthusiasts alike.
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 Mathis Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Yellowjacket Cr At Hammett Rd Blw Hogansville | 21 cfs | → |
| New River At Ga 100 | 33 cfs | → |
| Line Creek Near Senoia | 16 cfs | → |
| Flint River Near Griffin | 60 cfs | → |
| Shoal Creek At Shoal Creek Rd | 9 cfs | → |
| Chattahoochee River At Us 27 | 1,300 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mathis Lake Dam.
Boat launches
- East Bagwell Road Pike County
- Troup County
- Mooty Bridge Road Lagrange
- Pine Crest Drive 127, Peachtree City
- 1124 Peachtree City
- West Mcintosh Road Spalding County
Campgrounds
Fishing spots
- Callaway Gardens Lake
- Padgett Lake
- Griffin City Reservoir
- Bartlett's Ferry (Lake Harding)
- Lake Harding
- Flatrock Park Lake
Track Mathis 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 Mathis Lake Dam
Where does the data for Mathis 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 Mathis Lake Dam.