Cochran-Maddox Lake Dam dam
Cochran-Maddox Lake Dam
Located in Cobb, Georgia, Cochran-Maddox Lake Dam is a privately owned structure built in 1951 primarily for recreational purposes. The dam stands at a height of 18.4 feet and spans 434 feet along Mountain Creek, offering a maximum storage capacity of 96.4 acre-feet. Despite its low hazard potential, the dam's risk assessment is moderate, indicating a need for ongoing risk management measures.
With a designer listed as 'UNKNOWN' and no state regulatory oversight, Cochran-Maddox Lake Dam remains unpermitted, uninspected, and unenforced by any state agency. It features an earth core and buttress construction, with an uncontrolled spillway type and outlet gates. While the dam's condition assessment is not rated, its emergency action plan status and risk management strategies are not fully disclosed, leaving room for improvement in ensuring public safety and environmental protection.
For water resource and climate enthusiasts, Cochran-Maddox Lake Dam presents an intriguing case study of a privately owned recreational structure with potential risks and management challenges. As the dam continues to serve its intended purpose, stakeholders may benefit from increased transparency, regulatory oversight, and proactive measures to mitigate any potential hazards and ensure the long-term safety and sustainability of the surrounding area.
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 Cochran-Maddox Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Chattahoochee River Below Morgan Falls Dam | 1,050 cfs | → |
| Sope Creek Near Marietta | 10 cfs | → |
| Noonday Creek At Hawkins Store Rd | 5 cfs | → |
| Chattahoochee River Above Roswell | 1,370 cfs | → |
| Noonday Creek At Shallowford Road | 13 cfs | → |
| Big Creek Near Alpharetta | 34 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cochran-Maddox Lake Dam.
Boat launches
- Johnson Ferry Road Southeast Sandy Springs
- Riveredge Lane Northwest Sandy Springs
- West Palisades Vinings
- Cobb Parkway South Vinings
- Lake Windward Landing 139, Alpharetta
- Chattahochee River Park Peachtree Corners
Campgrounds
- Dobbins Lakeside Military
- Payne - Allatoona Lake
- Victoria - Allatoona Lake
- Sweetwater - Allatoona Lake
- Clark Creek South - Allatoona Lake
- Clark Creek North - Allatoona Lake
Fishing spots
Track Cochran-Maddox 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 Cochran-Maddox Lake Dam
Where does the data for Cochran-Maddox 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 Cochran-Maddox Lake Dam.