Grupes Reservoir Dam
High HazardPoor ConditionEmergency Action Plan: Yes
Location
| State | Connecticut |
| County | Fairfield |
| Nearest City | PINE HILL |
| River/Stream | SILVERMINE RIVER |
| Coordinates | 41.18968, -73.48875 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 235 ft |
| Year Completed | 1871 (155 years old) |
Storage & Hydraulics
| NID Storage | 311 acre-ft |
| Max Storage | 311 acre-ft |
| Normal Storage | 171 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 2,900 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Norwalk |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 05/10/2021 |
| Emergency Action Plan | Yes |