Quaddick Reservoir Dike dam
Quaddick Reservoir Dike
The Quaddick Reservoir Dike, located in Windham, Connecticut, is a state-owned earth dam completed in 1900 primarily for recreational purposes. The dam, standing at a height of 18.5 feet and with a length of 420 feet, holds a maximum storage capacity of 5,100 acre-feet and covers a surface area of 467 acres. The reservoir, situated on the Fivemile River, serves as a popular spot for outdoor activities such as boating, fishing, and wildlife observation.
Despite its fair condition assessment and high hazard potential, the Quaddick Reservoir Dike is regulated, inspected, and permitted by the Connecticut Department of Energy and Environmental Protection (DEEP). With a drainage area of 24.2 square miles and a normal storage capacity of 4,280 acre-feet, the dam plays a crucial role in flood control and water resource management in the region. The structure is also associated with one other dam, CT00184, and undergoes inspections every two years to ensure its integrity and safety.
Owned and operated by the state, the Quaddick Reservoir Dike is a key component of Connecticut's water infrastructure. With its historical significance dating back over a century, the dam continues to provide vital recreational opportunities while simultaneously serving as a vital resource for climate enthusiasts and water resource management professionals alike. Its location in Thompson, along with its impressive storage capacity and role in flood control, highlights the importance of this earth dam in the region's overall water management system.
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 Quaddick Reservoir Dike -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Quinebaug R At West Thompson | 225 cfs | → |
| French R At N Grosvenordale | 116 cfs | → |
| Quinebaug River At Putnam | 432 cfs | → |
| Little River At Harrisville | 29 cfs | → |
| Nipmuc River Near Harrisville | 17 cfs | → |
| French River At Webster | 7 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Quaddick Reservoir Dike.
Boat launches
- Quaddick Reservoir
- Clarkville Pond
- Bowdish Reservoir
- Pascoag Reservoir Fishing Access
- North Road 1060, Killingly
- Wallum Lake Road 107, Douglas
Campgrounds
- Narragansett Council, Boy Scouts Of America, Cub World
- George Washington State Campground
- Dyer Woods Nudist Campgrounds
- Brialee
- Highland Campground
- Wilderness Lake Campground
Fishing spots
Paddle runs
- Begins Below The Tailrace Of The Rainbow Dam To The Confluence With The Connecticut River
- The Confluence Of The East And West Branches To The Confluence With The Farmington River In East Granby
- The Massachusetts-Connecticut State Line In Hartland To The Confluence With The Salmon Brook Main Stem
Track Quaddick Reservoir 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 Quaddick Reservoir Dike
Where does the data for Quaddick Reservoir 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 Quaddick Reservoir Dike.