Stone Mills Dam 2 dam
Stone Mills Dam 2
Stone Mills Dam 2, also known as Stone Mills Pond, is a state-owned structure located in Limerick, New York. Built in 1989, this earth dam stands at a height of 11 feet and spans a length of 2800 feet, with a storage capacity of 4770 acre-feet. Situated on the Perch River, the dam serves a primary purpose of "Other" and is regulated by the New York State Department of Environmental Conservation.
Despite its low hazard potential, Stone Mills Dam 2 poses a very high risk due to its critical location and the surrounding area's vulnerability to potential flooding. The spillway, with a width of 38 feet, is designed as a controlled outlet for excess water flow. The dam's condition is currently rated as "Not Rated," indicating a need for further assessment and monitoring to ensure its structural integrity and safety.
With a limited history of inspections dating back to July 1996, Stone Mills Dam 2 remains a significant water resource management asset in Jefferson County. As climate change continues to impact water resources and infrastructure, ongoing attention and risk management measures are essential to safeguarding this vital dam and the community it serves.
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 Stone Mills Dam 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Black River At Watertown Ny | 4,300 cfs | → |
| Sandy Creek Near Adams Ny | 655 cfs | → |
| Beaver River At Croghan Ny | 893 cfs | → |
| West Branch Oswegatchie R Nr Harrisville Ny | 633 cfs | → |
| Salmon River At Pineville Ny | 953 cfs | → |
| Independence River At Donnattsburg Ny | 219 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stone Mills Dam 2.
Boat launches
- Conservation Department Road Jefferson County
- Jefferson County
- To Boat Launch Theresa
- State Highway 12e 8777, Chaumont
- Hyde Lake
Campgrounds
- Remington Park Rv Military - Fort Drum
- Grass Point State Park
- Long Point State Park
- Cedar Point State Park
- Wellesley Island State Park
- Westcott Beach State Park
Track Stone Mills Dam 2 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 Stone Mills Dam 2
Where does the data for Stone Mills Dam 2 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 Stone Mills Dam 2.