Heuvelton dam
Heuvelton
Heuvelton, a privately-owned hydroelectric dam located in St. Lawrence County, New York, along the Oswegatchie River, stands as a testament to engineering excellence since its completion in 1923. With a concrete multi-arch design and a significant structural height of 7 feet, the dam serves a primary purpose of hydroelectric power generation. The dam boasts a maximum storage capacity of 405 acre-feet and covers a surface area of 239 acres, drawing water from a drainage area of 995 square miles.
The dam's spillway, controlled by a width of 168 feet, ensures efficient water discharge at a maximum rate of 23,000 cubic feet per second. Despite its impressive capabilities, Heuvelton is classified with a significant hazard potential, prompting stringent inspection protocols by the Federal Energy Regulatory Commission. The dam's risk assessment rates it as very high, highlighting the critical importance of effective risk management measures to safeguard against potential emergencies and ensure the dam's continued safe operation for the surrounding community.
In the care of the Federal Energy Regulatory Commission, Heuvelton undergoes regular inspections and emergency action plan updates to mitigate risks and respond promptly to any unforeseen events. The dam's enduring presence and vital role in hydroelectric power generation underscore its significance as a key player in water resource management and climate adaptation efforts. As a focal point for water resource and climate enthusiasts, Heuvelton represents a harmonious blend of human ingenuity and environmental stewardship in harnessing the power of water for sustainable energy production.
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 Heuvelton -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Oswegatchie River Near Heuvelton Ny | 2,400 cfs | → |
| Grass River At Chase Mills Ny | 1,260 cfs | → |
| Raquette River At Raymondville Ny | 2,030 cfs | → |
| Raquette River At South Colton Ny | 880 cfs | → |
| West Branch Oswegatchie R Nr Harrisville Ny | 707 cfs | → |
| Oswegatchie River Near Oswegatchie Ny | 832 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Heuvelton .
Boat launches
- Maple City Trail Ogdensburg
- Patterson Street Boat Launch
- Corrine Street Prescott
- Grass River
- Dundas Street Cardinal
- Fish Creek
Track Heuvelton 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 Heuvelton
Where does the data for Heuvelton 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 Heuvelton .