Stone Hill Reservoir Dam dam
Stone Hill Reservoir Dam
Stone Hill Reservoir Dam, located in Griswold, Connecticut, is a captivating concrete structure completed in 1894 with a height of 35 feet and a length of 470 feet. Situated on Reservoir Brook, this dam serves as a critical water resource for the area, providing a storage capacity of 1000 acre-feet and covering a surface area of 30 acres. The dam is state-regulated and inspected regularly by the Department of Energy and Environmental Protection, ensuring its satisfactory condition and significant hazard potential is managed effectively.
The Stone Hill Reservoir Dam features an uncontrolled spillway with a width of 16 feet and utilizes slide (sluice gate) outlet gates for water release. Despite its age, the dam remains structurally sound and continues to fulfill its primary purpose as a vital component of the local water infrastructure. With its moderate risk assessment rating, the dam is closely monitored for any potential issues, with emergency action plans in place to address any unforeseen events. Overall, Stone Hill Reservoir Dam stands as a testament to engineering excellence and serves as a key asset in managing water resources and climate impacts in the region.
For water resource and climate enthusiasts, Stone Hill Reservoir Dam offers a fascinating glimpse into the intersection of infrastructure, environmental regulation, and emergency preparedness. Its historical significance, coupled with its ongoing role in safeguarding the community against water-related hazards, makes it a noteworthy subject of study and admiration. As climate change continues to impact water resources worldwide, structures like the Stone Hill Reservoir Dam serve as critical pieces of the puzzle in ensuring sustainable water management practices for future generations.
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 Stone Hill Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Quinebaug River At Jewett City | 936 cfs | → |
| Little River Near Hanover | 35 cfs | → |
| Shetucket River At Taftville | 780 cfs | → |
| Wood River Near Arcadia | 38 cfs | → |
| Pendleton Hill Brook Near Clarks Falls | 4 cfs | → |
| Yantic River At Yantic | 90 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Stone Hill Reservoir Dam.
Boat launches
- Jeffrey Lane Griswold
- Butts Bridge Road Canterbury
- Beachdale Pond
- Glasgo Pond State Boat Launch
- Lovell Lane 50, Canterbury
- Beach Pond
Campgrounds
- Highland Campground
- Dyer Woods Nudist Campgrounds
- Mystic Koa Holiday
- Laurel Lock Camp
- 315 - Burlingham
- Camp Watchaug (Westerly Ymca)
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
- Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
- The Confluence With The Nepaug River To A Point 0.2 Miles Below The Lower Collinsville Dam Tailrace
- New Hartford/Canton Town Line To The Confluence With The Nepaug River
Track Stone Hill Reservoir 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 Stone Hill Reservoir Dam
Where does the data for Stone Hill Reservoir 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 Stone Hill Reservoir Dam.