Treadwell Mills dam
Treadwell Mills
Treadwell Mills is a privately owned hydroelectric dam located on the Saranac River in Plattsburgh, New York. Built in 1938, this gravity dam stands at 24 feet tall and spans 278 feet in length, with a maximum storage capacity of 820 acre-feet. The dam has a significant hazard potential and is under the jurisdiction of the Federal Energy Regulatory Commission (FERC), which oversees its operations and inspections.
With a drainage area of 604 square miles and a maximum discharge of 1200 cubic feet per second, Treadwell Mills plays a crucial role in water resource management and renewable energy production in the region. The dam features a controlled spillway and nine slide gates for water release, ensuring the safety and stability of the structure. Despite its age, the condition assessment of Treadwell Mills is currently unavailable, highlighting the need for regular monitoring and maintenance to mitigate any potential risks associated with the dam.
As a key player in the local water infrastructure, Treadwell Mills presents both opportunities and challenges for water resource and climate enthusiasts. Its historical significance, combined with its operational importance for hydroelectric power generation, underscores the need for sustainable management practices and proactive risk mitigation strategies to safeguard both the environment and the community. By staying informed and engaged with the regulatory oversight and maintenance efforts surrounding Treadwell Mills, enthusiasts can contribute to the preservation and responsible utilization of this vital water resource asset.
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 Treadwell Mills -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Saranac River At Plattsburgh Ny | 1,170 cfs | → |
| Salmon River At South Plattsburgh Ny | 44 cfs | → |
| Little Ausable River Near Valcour Ny | 43 cfs | → |
| Ausable River Near Au Sable Forks Ny | 600 cfs | → |
| Little Chazy River Near Chazy Ny | 64 cfs | → |
| E Br Ausable River At Au Sable Forks Ny | 237 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Treadwell Mills .
Boat launches
- Green Street 32, Plattsburgh
- Green Street Plattsburgh
- Peru Boat Launch
- Fish Hatchery Road Grand Isle
- West Shore Road Grand Isle
- Sunrise Drive South Hero
Campgrounds
- Cumberland Bay State Park
- Primitive Campsite 13
- Primitive Campsite 14
- Primitive Campsite 16
- Primitive Campsite 15
- Primitive Campsite 20
Track Treadwell Mills 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 Treadwell Mills
Where does the data for Treadwell Mills 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 Treadwell Mills .