Delaney Complex Dam
Delaney Complex Dam is an earth dam located in Middlesex County, Massachusetts, built in 1967. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Delaney Complex Dam
The primary purpose of Delaney Complex Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Ma Department Of Conservation & Recreation (state). It impounds the Elizabeth Brook near Stow.
The dam stands 22 feet tall and stretches 2,400 feet across, creates a reservoir covering 163 acres, has a maximum storage capacity of 3,980 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1967, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 04/05/2022.
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Location
| State | Massachusetts |
| County | Middlesex |
| Nearest City | Stow |
| River/Stream | Elizabeth Brook |
| Coordinates | 42.44795, -71.54700 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Length | 2,400 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 3,980 acre-ft |
| Max Storage | 3,980 acre-ft |
| Normal Storage | 425 acre-ft |
| Surface Area | 163 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 140 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | MA Department of Conservation & Recreation |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/05/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA01193 |
| Federal ID | MA01193 |
| More Info | State Dam Safety Program |