Philadelphia - Nonoverflow Section dam
Philadelphia - Nonoverflow Section
Philadelphia - Nonoverflow Section is a private-owned structure situated in Jefferson, New York, along the Indian River. This hydroelectric dam, completed in 1910, stands at a height of 13 feet and has a storage capacity of 89 acre-feet. With a low hazard potential, the dam serves the primary purpose of generating hydroelectric power, contributing to the region's renewable energy resources.
Managed by the Federal Energy Regulatory Commission, Philadelphia - Nonoverflow Section plays a vital role in water resource management and climate resilience. Despite its age, the dam has not undergone recent condition assessments, but its risk assessment indicates a high level of risk, emphasizing the importance of regular inspections and maintenance to ensure its continued safe operation. While not regulated by the state, the dam falls under federal oversight, highlighting the interplay between different levels of government in safeguarding critical infrastructure.
As an integral part of the water infrastructure in the region, Philadelphia - Nonoverflow Section underscores the need for proactive risk management measures and emergency preparedness. With its gravity dam type and concrete construction, the structure stands as a testament to early 20th-century engineering. By staying abreast of evolving climate challenges and investing in the upkeep of such vital assets, communities can better adapt to changing environmental conditions and ensure a sustainable water supply for future generations.
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 Philadelphia - Nonoverflow Section -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Black River At Watertown Ny | 3,760 cfs | → |
| West Branch Oswegatchie R Nr Harrisville Ny | 593 cfs | → |
| Beaver River At Croghan Ny | 549 cfs | → |
| Sandy Creek Near Adams Ny | 180 cfs | → |
| Oswegatchie River Near Oswegatchie Ny | 852 cfs | → |
| Independence River At Donnattsburg Ny | 161 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Philadelphia - Nonoverflow Section .
Boat launches
Campgrounds
- Remington Park Rv Military - Fort Drum
- Keewaydin State Park
- Grass Point State Park
- Kring Point State Park
- Dewolf Point State Park
- Wellesley Island State Park
Track Philadelphia - Nonoverflow Section 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 Philadelphia - Nonoverflow Section
Where does the data for Philadelphia - Nonoverflow Section 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 Philadelphia - Nonoverflow Section .