Allison Lake dam
Allison Lake
Located in Marshall, Tennessee, Allison Lake, also known as Lewis Lake Dam, is a private fish and wildlife pond designed by the USDA NRCS and completed in 1971. This Earth dam stands at a structural height of 25 feet with a hydraulic height of 20 feet and has a storage capacity of 66 acre-feet. The dam serves the primary purpose of supporting fish and wildlife habitats while also providing recreational opportunities for visitors.
The dam is situated on the East Fork Bradshaw Creek and is not regulated or inspected by the state. With a significant hazard potential and a moderate risk assessment rating, the dam has not been officially assessed for its condition. Despite this, the dam remains a popular destination for water resource and climate enthusiasts, offering a serene environment for wildlife observation and outdoor activities. With its uncontrolled spillway and rock and soil foundations, Allison Lake is a unique and valuable asset to the local ecosystem.
While the dam does not have associated structures and is not owned by a federal agency, it continues to be a focal point for conservation efforts in the area. The Nashville District oversees the dam's operations, ensuring that it remains a safe and sustainable resource for both wildlife and visitors. For those interested in water resource management and climate conservation, Allison Lake represents a harmonious blend of human ingenuity and environmental stewardship, making it a must-visit destination for enthusiasts in the field.
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 Allison Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cane Creek Near Howell | 0 cfs | → |
| Big Rock Cr At Double Bridges | 3 cfs | → |
| Fountain Creek Near Fountain Heights | 3 cfs | → |
| Elk River Above Fayetteville | 262 cfs | → |
| Duck River Above Milltown | 175 cfs | → |
| Elk River At Prospect | 662 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Allison Lake.
Boat launches
- Vales Mill Road 1300-1368, Pulaski
- Sowell Mill Pike 3181-3183, Columbia
- Lillard's Mill Launch Area
- Howards Bridge Boat Access
- Veto Road 2156, Prospect
- Champ Road 48-142, Kelso
Fishing spots
- Fayetteville Old Stone Bridge
- Madison County Lake
- Tva Public Land
- Crowder Slough
- Buckeye Pond
- Brotherick Branch
Paddle runs
More reservoirs
Track Allison Lake 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 Allison Lake
Where does the data for Allison Lake 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 Significant 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 Allison Lake.