Oneco Pond Dam dam
Oneco Pond Dam
Oneco Pond Dam, located in Sterling, Connecticut, is a historic masonry dam completed in 1900 with a primary purpose of recreation. The dam stands at 9 feet high and spans a length of 120 feet, creating a reservoir with a storage capacity of 66 acre-feet. Situated on the Moosup River, the dam provides a picturesque setting for water resource and climate enthusiasts to explore and enjoy.
Despite its age, Oneco Pond Dam is still in use and regulated by the Connecticut Department of Energy and Environmental Protection (DEEP). The dam has a significant hazard potential and has not been rated for its condition assessment, indicating the need for regular inspections and potentially some maintenance work. With a drainage area of 36.6 square miles and a maximum discharge capacity of 1365 cubic feet per second, the dam plays a crucial role in managing water flow and providing recreational opportunities for the local community.
While Oneco Pond Dam has not had any recent inspections or assessments, it remains an important structure for both water management and recreation in the region. As efforts are made to ensure the safety and integrity of the dam, enthusiasts can continue to appreciate the beauty and functionality of this historic masonry structure along the Moosup River in Windham County, Connecticut.
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 Oneco Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wood River Near Arcadia | 38 cfs | → |
| Ponaganset River At South Foster | 7 cfs | → |
| Nooseneck River At Nooseneck | 9 cfs | → |
| Quinebaug River At Jewett City | 918 cfs | → |
| Little River Near Hanover | 34 cfs | → |
| South Branch Pawtuxet River At Washington | 87 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Oneco Pond Dam.
Boat launches
- Squaw Rock Road Killingly
- Beach Pond
- Lovell Lane 50, Canterbury
- Beachdale Pond
- Jeffrey Lane Griswold
- Butts Bridge Road Canterbury
Campgrounds
- Dyer Woods Nudist Campgrounds
- Highland Campground
- George Washington State Campground
- Mystic Koa Holiday
- Narragansett Council, Boy Scouts Of America, Cub World
- Camp Hoffman
Fishing spots
Track Oneco 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 Oneco Pond Dam
Where does the data for Oneco 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 Oneco Pond Dam.