Coastal Lumber Co. Lake Dam #4 dam
Coastal Lumber Co. Lake Dam #4
Coastal Lumber Co. Lake Dam #4, located in Decatur, Georgia, was completed in 1950 and serves as a recreational water resource in the area. This earth dam stands at a height of 22.4 feet and has a storage capacity of 212.6 acre-feet, with a normal storage level of 161.5 acre-feet. The dam spans a length of 515 feet and covers a surface area of 17 acres, drawing from a drainage area of 534 square miles.
Despite its low hazard potential, Coastal Lumber Co. Lake Dam #4 has not been rated for its condition as of the last inspection in 2008. The dam features an uncontrolled spillway and outlet gates, indicating a simplistic design for water release. With a moderate risk assessment score of 3, there are no available risk management measures or inundation maps prepared for potential emergencies. The dam is privately owned and maintained, with regular inspections occurring every five years to ensure its structural integrity.
Enthusiasts of water resources and climate will find Coastal Lumber Co. Lake Dam #4 to be an interesting case study in recreational dam infrastructure. With its historical significance and moderate risk assessment, this dam serves as a valuable asset for the surrounding community while highlighting the importance of regular inspections and maintenance for the safety of both the dam and the environment it impacts.
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 Coastal Lumber Co. Lake Dam #4 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Attapulgus Creek At Attapulgus | 4 cfs | → |
| Ochlockonee River Nr Concord | 1,640 cfs | → |
| Little River Nr Quincy | 121 cfs | → |
| Flint River At Bainbridge | 7,510 cfs | → |
| Ochlockonee River Nr Havana | 1,770 cfs | → |
| Little River Nr Midway | 77 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Coastal Lumber Co. Lake Dam #4.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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More reservoirs
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About Coastal Lumber Co. Lake Dam #4
Where does the data for Coastal Lumber Co. Lake Dam #4 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 below 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.
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.