Popolopen Lake dam
Popolopen Lake
Popolopen Lake, located in the Town of Highlands, Orange County, New York, is a Federal-owned body of water managed by the US Army for its primary purpose as a Fish and Wildlife Pond. With a maximum storage capacity of 1030 acre-feet and a normal storage capacity of 1000 acre-feet, the lake covers a surface area of 145 acres and drains an area of approximately 6 square miles, with a maximum discharge capacity of 565 cubic feet per second.
The dam at Popolopen Lake is an Earth-type structure with a height of 15 feet and a hydraulic height of 13 feet, providing flood risk reduction benefits to the surrounding area. The dam is regulated by the New York State Department of Environmental Conservation (NYS DEC) and undergoes regular inspections by the US Army to ensure its safety and functionality. The lake is also connected to Popolopen Creek, further enhancing its ecological significance and water resource management.
With a high hazard potential and a valve outlet gate system, Popolopen Lake serves as a vital habitat for fish and wildlife while mitigating flood risks in the region. The dam's emergency action plan was last revised in July 2016, emphasizing the importance of preparedness and risk management in safeguarding the surrounding community and environment. As a key component of the local water infrastructure, Popolopen Lake stands as a testament to the collaborative efforts between federal and state agencies in ensuring the sustainable use and conservation of water resources 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 Popolopen Lake -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Croton R @ New Croton Dam Nr Croton-On-Hudson Ny | 272 cfs | → |
| Muscoot River At Baldwin Place Ny | 4 cfs | → |
| Mahwah River Near Suffern Ny | 7 cfs | → |
| Ramapo River At Ramapo Ny | 60 cfs | → |
| Muscoot River Below Dam At Amawalk Ny | 12 cfs | → |
| West Branch Croton River At Richardsville Ny | 4 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Popolopen Lake .
Boat launches
- Bear Mountain Bridge Road Cortlandt
- Hudson Avenue Peekskill
- Broadway Buchanan
- Battlefield Road Town Of Stony Point
- Cortlandt Street Cortlandt
- Croton Riverwalk Croton-On-Hudson
Campgrounds
- Round Pond Military
- Camping For Hikers On Ballfield Graymoor Center
- Beaver Pond Campsite
- Beaver Pond - Harriman State Park
- Blue Mountain Reservation
- Clarence Fahnestock State Park
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
- Falls Mountain Road In Canaan, Connecticut To Kent Bridge
Track Popolopen Lake 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 Popolopen Lake
Where does the data for Popolopen Lake 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 High 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 Popolopen Lake .