Petrillo Lake Dam dam
Petrillo Lake Dam
Located in North Branch, New York, the Petrillo Lake Dam stands as a recreational marvel, completed in 1952 to provide both locals and visitors with opportunities for leisure and enjoyment. As a privately owned structure, this earth-type dam spans 480 feet in length and reaches a height of 17 feet, creating a serene lake covering 9 acres with a maximum storage capacity of 68 acre-feet. The dam's primary purpose is for recreation, offering a picturesque setting for activities such as fishing, boating, and picnicking.
Managed by the New York State Department of Environmental Conservation (NYS DEC), Petrillo Lake Dam is regularly inspected for safety and compliance, with state jurisdiction, permitting, and enforcement in place to ensure proper maintenance and operation. Despite being categorized with a low hazard potential and a moderate risk assessment rating, the dam has not been formally rated for its condition, indicating a need for ongoing monitoring and risk management measures. With a spillway type of "Uncontrolled" and a controlled maximum discharge of 358 cubic feet per second, Petrillo Lake Dam serves as a vital component of the local ecosystem and water resource management in Sullivan County.
As climate change continues to impact water resources and infrastructure, the significance of structures like Petrillo Lake Dam in maintaining recreational opportunities while also safeguarding against potential hazards becomes increasingly apparent. With its serene beauty and functional purpose, this dam exemplifies the delicate balance between human enjoyment and environmental stewardship in the face of a changing climate.
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 Petrillo Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Beaver Kill At Cooks Falls Ny | 409 cfs | → |
| Delaware River At Callicoon Ny | 2,410 cfs | → |
| Delaware River At Lordville Ny | 1,980 cfs | → |
| East Br Delaware R At Fishs Eddy Ny | 871 cfs | → |
| East Br Delaware River At Harvard Ny | 351 cfs | → |
| Equinunk Creek Near Dillontown | 41 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Petrillo Lake Dam.
Track Petrillo Lake Dam 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 Petrillo Lake Dam
Where does the data for Petrillo Lake Dam 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 Petrillo Lake Dam.