Roy Alexander Dam dam
Roy Alexander Dam
Roy Alexander Dam, also known as Alexander Lake, is a private-owned structure located in Greensboro, Alabama. Built in 1968 by the USDA NRCS, this Earth-type dam stands at 18 feet high and spans 600 feet in length. Its primary purpose is to serve as a Fish and Wildlife Pond, providing vital habitat for local flora and fauna.
With a storage capacity of 126 acre-feet, the dam helps regulate the flow of TR-Big German Creek and supports a drainage area of 0.19 square miles. Despite its low hazard potential, the dam has not been rated for its condition assessment since its last inspection in 1979. Its spillway type is uncontrolled, with a width of 60 feet, and a maximum discharge capacity of 200 cubic feet per second.
For water resource and climate enthusiasts, Roy Alexander Dam offers a glimpse into the intersection of human engineering and environmental conservation. As a critical component of the local ecosystem, this dam plays a crucial role in supporting biodiversity and maintaining the delicate balance of water resources in the region. Its historical significance, coupled with its ongoing management and risk assessment, make it a noteworthy site for those interested in the intersection of infrastructure and sustainability.
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 Roy Alexander Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Tombigbee R At Demopolis L&D Near Coatopa | 2,730 cfs | → |
| Black Warrior River At Selden L & D Near Eutaw | 263 cfs | → |
| Elliotts Creek At Moundville Al | 8 cfs | → |
| Cahaba River Near Marion Junction Al | 698 cfs | → |
| Sucarnoochee River At Livingston Al | 326 cfs | → |
| Tombigbee R At Gainesville L&D Nr Gainesville Al | 1,830 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Roy Alexander Dam.
Campgrounds
Fishing spots
Track Roy Alexander 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 Roy Alexander Dam
Where does the data for Roy Alexander 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 Roy Alexander Dam.