Bristol Reservoir #4 Dam dam
Bristol Reservoir #4 Dam
Located in Terryville, Connecticut, the Bristol Reservoir #4 Dam stands as a crucial water supply infrastructure managed by the local government. Completed in 1906, this earth-type dam boasts a height of 40 feet and a length of 970 feet, with a capacity to store up to 945 acre-feet of water. The dam's primary purpose is to provide water to the surrounding areas, with a normal storage capacity of 807 acre-feet and a maximum discharge rate of 760 cubic feet per second.
The dam, situated on the Poland River, is regulated by the Connecticut Department of Energy and Environmental Protection, ensuring its compliance with state safety and inspection standards. Despite its significant hazard potential, the Bristol Reservoir #4 Dam has been assessed as satisfactory in condition, with the last inspection conducted in May 2015. With a spillway width of 30 feet and a surface area of 45 acres, this dam plays a vital role in water resource management in Litchfield County, Connecticut. Climate and water resource enthusiasts can appreciate the historical significance and engineering marvel of the Bristol Reservoir #4 Dam in ensuring a stable water supply for the region.
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 Bristol Reservoir #4 Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Burlington Brook Near Burlington | 2 cfs | → |
| Naugatuck River At Thomaston | 62 cfs | → |
| Farmington River At Unionville | 266 cfs | → |
| Quinnipiac River At Southington | 45 cfs | → |
| Nonewaug River At Minortown | 10 cfs | → |
| Shepaug River At Peters Dam At Woodville | 21 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Bristol Reservoir #4 Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Bristol Reservoir #4 Dam
Where does the data for Bristol Reservoir #4 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 below 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.
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.