John Sevier Dam dam
John Sevier Dam
John Sevier Dam, also known as John Sevier Detention Dam, is a concrete structure located on the Holston River in Hawkins, Tennessee. Built in 1955 by the Tennessee Valley Authority (TVA), this dam serves as a vital water supply source with a storage capacity of 5,500 acre-feet. With a height of 20 feet and a hydraulic height of 45 feet, the dam plays a crucial role in regulating water flow and ensuring a stable water supply for the region.
The dam, with a length of 1,110 feet and a spillway width of 636 feet, has a significant hazard potential and is classified as having a moderate risk level. Despite its age, the dam remains in good condition as per the latest inspection in December 2020, with an inspection frequency of every 2 years. Operated and maintained by the TVA, the John Sevier Dam exemplifies the agency's commitment to water resource management and safety in the region.
With its primary purpose being water supply, the John Sevier Dam stands as a testament to engineering excellence and serves as a crucial infrastructure for water storage and management on the Holston River. As a Federal-owned structure, it continues to play a pivotal role in ensuring water security and flood control measures in the area, highlighting the importance of responsible water resource management in the face of climate change and increasing water demands.
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 John Sevier Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Creek Near Rogersville | 9 cfs | → |
| Crockett Creek Below Rogersville | 1 cfs | → |
| Clinch River Near Looneys Gap | 1,750 cfs | → |
| Powell River Near Jonesville | 130 cfs | → |
| Nolichucky River Near Lowland | 679 cfs | → |
| Big Limestone Creek Near Limestone | 27 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near John Sevier Dam.
Boat launches
- T V A Road, Rogersville
- Beech Creek Boat Ramp
- Malinda Ferry Road, Rogersville
- Long Bend Road, Surgoinsville
- Jesus Church Road, Mooresburg
- Christian Bend Road 1008, Church Hill
Campgrounds
- Cherokee Lake County Park
- Davy Crockett Birthplace
- Kinser Park
- Horse Creek Recreation Area
- Horse Creek Rec Area
- Old Forge Campground
Fishing spots
Paddle runs
- Tn/Nc State Line (Rm 100.6) To Mine Branch (Rm 99.3)
- Headwaters To Alternative Route 58
- Fs Route 700 To Confluence With Clinch River
- Boundary Between Mitchell And Yancy Counties To Nc/Tn Stateline
- Confluence With Guest River To Confluence With Little Stony Creek
- State Route 72 Bridge To Confluence With Clinch River
Track John Sevier 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 John Sevier Dam
Where does the data for John Sevier 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 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 John Sevier Dam.