Larchmont Dam dam
Larchmont Dam
Larchmont Dam, located in Larchmont, New York, was completed in 1925 and has a significant historical and environmental impact on the area. This masonry dam on the Sheldrake River serves as a vital structure for flood control and water storage, with a storage capacity of 37 acre-feet and a spillway width of 50 feet. The dam is owned by the local government and is regulated by the New York State Department of Environmental Conservation.
Despite its age, Larchmont Dam has faced challenges in recent years, with a poor condition assessment and a significant hazard potential. The dam's last inspection in 2020 revealed the need for improvements and maintenance to ensure its continued functionality and safety. The risk assessment for the dam is moderate, highlighting the importance of ongoing monitoring and management to mitigate potential risks to the surrounding community and environment.
As a key infrastructure for water resource management in the region, Larchmont Dam plays a crucial role in maintaining the balance of water levels and preventing flooding. Climate enthusiasts and water resource advocates are closely monitoring the dam's condition and advocating for necessary upgrades to enhance its resilience in the face of changing weather patterns and increasing risks of extreme events. The dam's significance in the local ecosystem and its potential impact on climate adaptation strategies make it a focal point for discussions on sustainable water management practices in the region.
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 Larchmont Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Hackensack River At Rivervale Nj | 28 cfs | → |
| Hackensack River At New Milford Nj | 5 cfs | → |
| Pascack Brook At Westwood Nj | 27 cfs | → |
| Rippowam River At Stamford | 7 cfs | → |
| Hackensack River At West Nyack Ny | 10 cfs | → |
| Pascack Brook At Park Ridge Nj | 7 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Larchmont Dam.
Boat launches
- Warburton Avenue 565, Hastings-On-Hudson
- Seagate Road 3, Greenwich
- Park Crescent 345, Queens
- Maple Way 10, Town Of North Castle
- Riverside Avenue Little Ferry
- Lloyd Harbor Road 72, Lloyd Harbor
Campgrounds
- Croton Point Park
- Battle Row
- Ward Pound Ridge Reservation
- Blue Mountain Reservation
- Park Shore Day Camp
- Beaver Pond - Harriman State Park
Fishing spots
Track Larchmont 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 Larchmont Dam
Where does the data for Larchmont 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 Larchmont Dam.