Chewalla Lake Dam (Lt 7-1) dam
Chewalla Lake Dam (Lt 7-1)
Chewalla Lake Dam (Lt 7-1) is a federal-owned structure located in Holly Springs, Mississippi, along Chewalla Creek. Built in 1966 by the USDA NRCS, this earth-type dam stands at 42 feet high and serves primarily for flood risk reduction. With a storage capacity of 9900 acre-feet, the dam plays a crucial role in managing water levels and mitigating potential flooding in the area.
The dam, managed by the Forest Service, features a controlled spillway with a width of 14 feet and a slide (sluice gate) outlet gate. Despite its low hazard potential, the dam is classified as having a very high risk due to its proximity to residential areas. The last inspection in April 2018 deemed the dam's condition as not rated, highlighting the need for regular monitoring and maintenance to ensure its effectiveness in protecting the surrounding community from potential flood events.
With the Mississippi Department of Environmental Quality regulating its operations, Chewalla Lake Dam remains a vital infrastructure for water resource management in the region. As climate change continues to impact weather patterns, the importance of maintaining and upgrading such structures becomes increasingly crucial to safeguard against the growing risks of flooding and ensure the safety and well-being of local residents and ecosystems.
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 Chewalla Lake Dam (Lt 7-1) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Tallahatchie River At Etta | 121 cfs | → |
| Wolf River At Lagrange | 131 cfs | → |
| Wolf River At Rossville | 409 cfs | → |
| Coldwater River Nr Olive Branch | 524 cfs | → |
| Yocona River Nr Oxford | 88 cfs | → |
| Hatchie River Near Walnut | 144 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Chewalla Lake Dam (Lt 7-1).
Campgrounds
Track Chewalla Lake Dam (Lt 7-1) 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 Chewalla Lake Dam (Lt 7-1)
Where does the data for Chewalla Lake Dam (Lt 7-1) 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 Chewalla Lake Dam (Lt 7-1).