Johnsons Pond Dam is an earth dam located in Essex County, Massachusetts, built in 1930. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 9 ft9 ft tall and 180 ft long. 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 Johnsons Pond Dam
The primary purpose of Johnsons Pond Dam 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 City of Haverhill (local government). It impounds the Tributary of Johnson Creek near Groveland.
The dam stands 9 feet tall and stretches 180 feet across, creates a reservoir covering 186 acres, has a maximum storage capacity of 1,900 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 05/10/2023.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Massachusetts |
| County | Essex |
| Nearest City | Groveland |
| River/Stream | Tributary of Johnson Creek |
| Coordinates | 42.73262, -71.04557 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Length | 180 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 1,900 acre-ft |
| Max Storage | 1,900 acre-ft |
| Normal Storage | 810 acre-ft |
| Surface Area | 186 acres |
| Drainage Area | 4 sq mi |
| Max Discharge | 170 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | City of Haverhill |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 05/10/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MA01204 |
| Federal ID | MA01204 |
| More Info | State Dam Safety Program |