Ellis Pond Dam dam
Ellis Pond Dam
Ellis Pond Dam, located in Westminster, Massachusetts, serves as a vital structure for recreation purposes. Completed in 1990, this gravity dam stands at a height of 6.6 feet and has a hydraulic height of 5.2 feet. With a storage capacity of 148 acre-feet and a surface area spanning 23.7 acres, the dam plays a crucial role in providing recreational opportunities for the community.
Managed by a private owner, Ellis Pond Dam is regulated by the Department of Conservation and Recreation in Massachusetts. The dam, classified as having a significant hazard potential, was last inspected in June 2014 and assessed to be in fair condition. While it meets guidelines for risk assessment, there is a moderate risk associated with the dam.
Overall, Ellis Pond Dam stands as a pivotal feature in the local landscape, offering both recreational benefits and serving as a crucial water resource. With its sound structural design and management by state regulators, the dam continues to play a significant role in the conservation and enjoyment of water resources in the area.
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 Ellis Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Otter River At Otter River | 263 cfs | → |
| North Nashua River At Fitchburg | 293 cfs | → |
| Ware River Near Barre | 242 cfs | → |
| North Nashua River Near Leominster | 437 cfs | → |
| Birch Hill Reservoir At South Royalston | 30 cfs | → |
| Stillwater River Near Sterling | 73 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Ellis Pond Dam.
Boat launches
- Whalom Lake Public Boat Ramp
- River Road Royalston
- Doane Hill Road Royalston
- Main Street 2010, Athol
- North Orange Road 52-534, Athol
- Grassy Pond Boat Launch
Campgrounds
- Otter River State Forest
- Beaman Pond Campground
- East Dennison Camping Area
- Lake Dennison State Park
- North Dennison Camping Area
- Damon Pond Campground
Track Ellis Pond 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 Ellis Pond Dam
Where does the data for Ellis Pond 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 Ellis Pond Dam.