Lebanon Water Treatment Intake Dam
Lebanon Water Treatment Intake Dam is a concrete dam located in Grafton County, New Hampshire, built in 1934. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Lebanon Water Treatment Intake Dam
The primary purpose of Lebanon Water Treatment Intake 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 Lebanon (local government). It impounds the Mascoma River near Lebanon.
The dam stands 16 feet tall and stretches 140 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 3 acre-feet, and collects water from a drainage area of 168 square miles. Completed in 1934, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 10/21/2020.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Lebanon |
| River/Stream | Mascoma River |
| Coordinates | 43.63910, -72.23330 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 140 ft |
| Year Completed | 1934 (92 years old) |
Storage & Hydraulics
| NID Storage | 3 acre-ft |
| Max Storage | 3 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 168 sq mi |
| Max Discharge | 5,314 cfs |
Ownership & Safety
| Purpose | Water Supply |
| Owner | CITY OF LEBANON |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/21/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH01068 |
| Federal ID | NH01068 |
| More Info | State Dam Safety Program |