Jnm1 dam
Jnm1
Jnm1 is a private dam located in Hamilton County, Florida, specifically in the city of Jasper. This recreational dam stands at a height of 10 feet and has a length of 528 feet, offering a surface area of 106 acres for water enthusiasts to enjoy. Situated on an unnamed pond, Jnm1 provides a storage capacity of 1785 acre-feet, making it a valuable resource for water recreation in the area.
While the hazard potential of Jnm1 is currently undetermined, its condition assessment is labeled as "Not Rated," suggesting a need for further evaluation. Despite its state-regulated status and adherence to state permitting, inspection, and enforcement protocols, there is no available information on the dam's inspection frequency or last inspection date. With its location in a flood-prone region like Florida, it is crucial for water resource and climate enthusiasts to stay informed about the safety and maintenance of dams like Jnm1 to ensure their sustainable use and protection of surrounding ecosystems.
As a recreational dam in Florida maintained by a private owner, Jnm1 provides a unique opportunity for outdoor activities and water-based recreation. Its presence on an unnamed pond adds to the diverse landscape of Hamilton County, attracting visitors looking to enjoy the natural beauty and water resources of the region. With its significant storage capacity and potential for recreational use, Jnm1 serves as a focal point for water resource and climate enthusiasts interested in the intersection of human activity and environmental conservation in the area.
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 Jnm1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Withlacoochee River Near Pinetta | 221 cfs | → |
| Alapaha River Near Jennings Fla | 429 cfs | → |
| Alapaha River At Statenville | 287 cfs | → |
| Withlacoochee River Nr Lee | 461 cfs | → |
| Suwannee River At Ellaville | 1,870 cfs | → |
| Withlacoochee River At Us 84 | 101 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Jnm1.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Jnm1
Where does the data for Jnm1 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 Undetermined 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.