Asylum Reservoir #4 Dam dam
Asylum Reservoir #4 Dam
Asylum Reservoir #4 Dam, formerly known as Asylum Reservoir #1, is a concrete dam located in Middlesex, Connecticut, with a primary purpose of water supply. Standing at a height of 30 feet and stretching 290 feet in length, this dam has a storage capacity of 500 acre-feet and covers a surface area of 18.9 acres. The dam is under state regulation by the Department of Energy and Environmental Protection (DEEP) in Connecticut, ensuring that it meets inspection, permitting, and enforcement standards.
With a significant hazard potential but a satisfactory condition assessment as of February 2020, the Asylum Reservoir #4 Dam is considered to have a moderate risk level. It features an uncontrolled spillway with a width of 37 feet and is situated on an unnamed river or stream in Middletown. While the dam has not undergone any modifications in recent years, it is subject to regular inspections every five years to monitor its safety and integrity. Overall, this dam serves as a crucial infrastructure for water resource management in the region, highlighting the importance of its maintenance and regulatory oversight in mitigating potential risks.
Although the Asylum Reservoir #4 Dam does not have associated locks or outlet gates, its presence plays a vital role in providing water supply to the surrounding communities in Middlesex, Connecticut. The dam's construction type, core materials, and foundation specifics are documented as part of its structural information, contributing to the overall understanding of its design and functionality. As climate change continues to impact water resources, the maintenance and management of dams like Asylum Reservoir #4 are essential in ensuring water security and resilience in the face of evolving environmental challenges.
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 Asylum Reservoir #4 Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Connecticut R At Middle Haddam | 43,400 cfs | → |
| Coginchaug River At Middlefield | 18 cfs | → |
| Salmon River Near East Hampton | 106 cfs | → |
| Quinnipiac River At Wallingford | 98 cfs | → |
| Quinnipiac River At Southington | 12 cfs | → |
| Eightmile R At North Plain | 20 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Asylum Reservoir #4 Dam.
Boat launches
- Crystal Lake
- Main Street 204, Cromwell
- Dooley Pond
- Beseck Lake
- Haddam Meadows (Connecticut River)
- Sunrise Road East Haddam
Campgrounds
Fishing spots
- Toms Creek
- Great Brook Reservoir
- Lower Fulton Park Pond
- Lake Wintergreen
- Seymour Reservoir Number 4
- Reservoir Number 2
Paddle runs
- 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
- Begins Below The Tailrace Of The Rainbow Dam To The Confluence With The Connecticut River
- New Hartford/Canton Town Line To The Confluence With The Nepaug River
- The Confluence Of The East And West Branches To The Confluence With The Farmington River In East Granby
- The Hartland Headwaters To The Confluence With The Salmon Brook Main Stem
Track Asylum Reservoir #4 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 Asylum Reservoir #4 Dam
Where does the data for Asylum 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 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 Asylum Reservoir #4 Dam.