Massawippa Lake Dam dam
Massawippa Lake Dam
Massawippa Lake Dam, located in Orange County, New York, was completed in 1934 and serves as a vital structure for recreation purposes. The dam, standing at 22 feet high and spanning 463 feet in length, holds a maximum storage capacity of 325 acre-feet of water from the TR-POPOLOPEN BROOK. Despite being classified as having a low hazard potential, the dam has not been rated for its condition, indicating a need for further assessment and potential maintenance.
The dam features an uncontrolled spillway with a width of 39 feet and is owned by the state of New York, regulated by the New York State Department of Environmental Conservation. With a moderate risk assessment rating, the dam's risk management measures and emergency action plan status remain unclear, highlighting the importance of ongoing monitoring and preparedness. The surrounding area of Massawippa Lake Dam covers a surface area of 26 acres, providing a scenic and recreational space for water resource and climate enthusiasts to enjoy and appreciate.
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 Massawippa Lake 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 | 272 cfs | → |
| Mahwah River Near Suffern Ny | 7 cfs | → |
| Ramapo River At Ramapo Ny | 60 cfs | → |
| Ramapo River At Suffern Ny | 40 cfs | → |
| Muscoot River At Baldwin Place Ny | 4 cfs | → |
| Ramapo River Near Mahwah Nj | 67 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Massawippa Lake Dam.
Boat launches
- Bear Mountain Bridge Road Cortlandt
- Broadway Buchanan
- Hudson Avenue Peekskill
- Battlefield Road Town Of Stony Point
- Cortlandt Street Cortlandt
- Croton Riverwalk Croton-On-Hudson
Campgrounds
- Round Pond Military
- Beaver Pond Campsite
- Beaver Pond - Harriman State Park
- Camping For Hikers On Ballfield Graymoor Center
- Blue Mountain Reservation
- Croton Point 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
Track Massawippa 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 Massawippa Lake Dam
Where does the data for Massawippa 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 Massawippa Lake Dam.