Walnut Grove Lake dam
Walnut Grove Lake
Walnut Grove Lake in Memphis, Tennessee, is a private recreational spot nestled along the Tributary of Wolf River. Managed by the Tennessee Safe Dams Program, this earth dam structure stands at a hydraulic height of 25.1 feet and was completed in 1963. The lake has a storage capacity of 686 acre-feet, with a normal storage of 470 acre-feet and a surface area of 46 acres, making it a popular destination for water resource and climate enthusiasts in the area.
Despite its significant hazard potential, Walnut Grove Lake is rated as satisfactory in its condition assessment as of August 2019. The dam's spillway type is uncontrolled, and its inspection frequency is set at two times per year. The risk assessment for the lake is moderate, and it poses a significant hazard potential. With its picturesque surroundings and recreational purpose, Walnut Grove Lake offers a serene setting for outdoor activities while remaining under the watchful eye of regulatory agencies.
For those interested in water resources and climate management, Walnut Grove Lake serves as a prime example of a well-maintained private dam structure in Tennessee. With its historical significance dating back to 1963, the lake continues to provide a safe and enjoyable environment for visitors to engage in various water activities. As climate change continues to impact water resources, Walnut Grove Lake stands as a testament to the importance of proper dam management and inspection protocols to ensure the safety and sustainability of such recreational water bodies.
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 Walnut Grove Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wolf River At Germantown | 1,100 cfs | → |
| Nonconnah Creek Near Germantown | 65 cfs | → |
| Fletcher Creek At Sycamore View Road At Memphis | 31 cfs | → |
| Wolf River At Rossville | 849 cfs | → |
| Coldwater River Nr Olive Branch | 272 cfs | → |
| Loosahatchie River Near Arlington | 168 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Walnut Grove Lake.
Track Walnut Grove 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 Walnut Grove Lake
Where does the data for Walnut Grove 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 Walnut Grove Lake.