Grassi-Corini-Grandolf Dam dam
Grassi-Corini-Grandolf Dam
Grassi-Corini-Grandolf Dam, also known as Deans Pond, is a privately owned dam located in Whitney Point, New York. Built in 1973, this earth dam stands at a height of 15 feet and stretches 100 feet in length, with a storage capacity of 518 acre-feet. The primary purpose of the dam is for recreation, providing a surface area of 37 acres for activities such as fishing and boating. It is regulated by the New York State Department of Environmental Conservation, ensuring that it is inspected, permitted, and enforced to meet state standards.
Situated on TR-Merrill Creek, the Grassi-Corini-Grandolf Dam plays a crucial role in managing water resources and mitigating flood risks in the area. With a low hazard potential and a moderate risk assessment rating, the dam is deemed to be in satisfactory condition, although it has not been officially rated. The spillway, with a width of 6 feet, is uncontrolled, allowing for controlled discharge of water during periods of high flow. While the dam has not been modified in recent years, it remains a key structure for maintaining water levels and protecting downstream areas.
Despite its modest size and limited associated structures, the Grassi-Corini-Grandolf Dam serves as an important recreational and safety feature in Cortland County, New York. With a history of providing water storage and flood control since its completion nearly five decades ago, this dam continues to be a valuable asset for water resource management and climate resilience 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 Grassi-Corini-Grandolf Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Otselic River At Cincinnatus Ny | 535 cfs | → |
| Tioughnioga River At Cortland Ny | 1,280 cfs | → |
| Chenango River At Greene Ny | 1,200 cfs | → |
| Chenango River Near Chenango Forks Ny | 5,100 cfs | → |
| Sixmile Creek At Brooktondale Ny | 83 cfs | → |
| Sixmile Creek At Bethel Grove | 102 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grassi-Corini-Grandolf Dam.
Track Grassi-Corini-Grandolf 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 Grassi-Corini-Grandolf Dam
Where does the data for Grassi-Corini-Grandolf 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 Grassi-Corini-Grandolf Dam.