Tower Hill Pond Dam
Tower Hill Pond Dam is an earth dam located in Rockingham County, New Hampshire, built in 1938. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Tower Hill Pond Dam
The primary purpose of Tower Hill 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 Manchester Water Works (local government). It impounds the Maple Falls Brook near Auburn.
The dam stands 35 feet tall and stretches 1,220 feet across, creates a reservoir covering 202 acres, has a maximum storage capacity of 5,020 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1938, the structure is well-established, with more than 75 years of service.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. 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 08/08/2022.
At 35 feet, this dam is taller than 82% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The New Hampshire dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Hampshire |
| County | Rockingham |
| Nearest City | Auburn |
| River/Stream | Maple Falls Brook |
| Coordinates | 43.03500, -71.36470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 1,220 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 5,020 acre-ft |
| Max Storage | 5,020 acre-ft |
| Normal Storage | 3,960 acre-ft |
| Surface Area | 202 acres |
| Drainage Area | 12 sq mi |
| Max Discharge | 7,884 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | MANCHESTER WATER WORKS |
| Owner Type | Local Government |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/08/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00219 |
| Federal ID | NH00219 |
| More Info | State Dam Safety Program |