Asylum Reservoir Dam #6 is an earth dam located in Middlesex County, Connecticut, built in 1954. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 28 ft28 ft tall and 630 ft long, taller than 62% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Asylum Reservoir Dam #6
The primary purpose of Asylum Reservoir Dam #6 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Connecticut Valley Hospital (state). It impounds the Unnamed Tributary to Ct River near Middletown.
The dam stands 28 feet tall and stretches 630 feet across, creates a reservoir covering 17 acres, has a storage capacity of 176 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1954, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 02/24/2020.
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Location
| State | Connecticut |
| County | Middlesex |
| Nearest City | Middletown |
| River/Stream | Unnamed Tributary to Ct River |
| Coordinates | 41.53088, -72.59018 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 630 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 176 acre-ft |
| Normal Storage | 176 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 793 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Connecticut Valley Hospital |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 02/24/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CT00144 |
| Federal ID | CT00144 |
| More Info | State Dam Safety Program |