Stony Point Dam dam
Stony Point Dam
Stony Point Dam, located in Rockland, New York, is a concrete structure completed in 1900 primarily for water supply purposes. Standing at a height of 16 feet and measuring 135 feet in length, this dam plays a crucial role in managing the flow of Cedar Pond Brook. With a storage capacity of 9 acre-feet, Stony Point Dam is a significant asset for the community of Stony Point and the surrounding areas.
Despite its age, Stony Point Dam remains in a condition that is currently not rated, with inspections conducted every four years to ensure its structural integrity. The dam's spillway, with a width of 21 feet, is uncontrolled, presenting a significant hazard potential that is carefully managed by the authorities. With a moderate risk assessment score of 3, efforts are in place to mitigate any potential risks associated with the dam and ensure the safety of the surrounding area in case of emergencies.
Owned by a public utility and regulated by the NYS DEC, Stony Point Dam stands as a testament to the importance of water resource management in the region. With its historical significance and vital role in supplying water to the community, Stony Point Dam serves as a focal point for water resource and climate enthusiasts interested in the sustainable management of water infrastructure in New York.
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 Stony Point Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Croton R @ New Croton Dam Nr Croton-On-Hudson Ny | 184 cfs | → |
| Mahwah River Near Suffern Ny | 7 cfs | → |
| Hackensack River At West Nyack Ny | 7 cfs | → |
| Ramapo River At Ramapo Ny | 51 cfs | → |
| Ramapo River At Suffern Ny | 35 cfs | → |
| Ramapo River Near Mahwah Nj | 65 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stony Point Dam.
Boat launches
- Battlefield Road Town Of Stony Point
- Cortlandt Street Cortlandt
- Broadway Buchanan
- Hudson Avenue Peekskill
- Bear Mountain Bridge Road Cortlandt
- Croton Riverwalk Croton-On-Hudson
Campgrounds
- Beaver Pond Campsite
- Beaver Pond - Harriman State Park
- Blue Mountain Reservation
- Croton Point Park
- Camping For Hikers On Ballfield Graymoor Center
- Round Pond Military
Fishing spots
Paddle runs
- Kent Bridge To Boardman Bridge
- Pond Downstream Of Shepaug Reservoir Dam, Marked By Service Road Bridge To Ends In Backwaters Of Lake Lillinonah, Near Roxbury Falls
- Begins Downstream Of The Borough Of Bantam, At Stoddard Road Bridge To The Confluence With The Shepaug River
Track Stony Point 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 Stony Point Dam
Where does the data for Stony Point 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 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 Stony Point Dam.