Greenleaf Dike dam
Greenleaf Dike
Greenleaf Dike, also known as Shawangunk Lake, is a local government-owned structure in Baileyville, Orange County, New York, designed to supply water. Completed in 1925, this earth dam stands at 32 feet high and stretches 333 feet in length. With a storage capacity of 1633 acre-feet, it serves as a critical water resource for the area, covering a surface area of 101 acres and draining a 1.5 square mile watershed.
Managed by the New York Department of Environmental Conservation, Greenleaf Dike has a high hazard potential due to its condition being assessed as fair. Regular inspections are conducted, with the last one taking place in December 2020, to ensure the safety and reliability of the structure. Despite its age, the dam continues to meet regulatory requirements for state permitting, inspection, and enforcement, providing a vital source of water supply for the community.
Located along the TR-Little Shawangunk Kill, Greenleaf Dike plays a crucial role in water management and flood control in the region. With its historical significance and ongoing operational importance, this dam stands as a testament to the intersection of water resource management and climate resilience 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 Greenleaf Dike -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Neversink River At Godeffroy Ny | 300 cfs | → |
| Delaware River At Port Jervis Ny | 3,490 cfs | → |
| Mongaup River Near Mongaup Ny | 205 cfs | → |
| Neversink River At Bridgeville Ny | 136 cfs | → |
| Delaware River At Montague Nj | 3,950 cfs | → |
| Mongaup River At Mongaup Valley Ny | 65 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Greenleaf Dike.
Boat launches
- Butler Court Town Of Mamakating
- Town Of Mamakating
- Old East Main Street Town Of Wallkill
- Winding Waters Trail Town Of Warwick
- Matamoras
- Plank Road Town Of Forestburgh
Track Greenleaf Dike 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 Greenleaf Dike
Where does the data for Greenleaf Dike 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 Greenleaf Dike.