Webster Valve Co Dam
Webster Valve Co Dam is a concrete dam located in Merrimack County, New Hampshire, built in 1901. It carries a Significant hazard potential classification and has a poor condition assessment.
About Webster Valve Co Dam
Webster Valve Co Dam is a dam in Merrimack, New Hampshire. The dam is owned by 174 N Main St Franlin Llc (private). It impounds the Chance Pond Brook near Franklin.
The dam stands 15 feet tall and stretches 178 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 1 acre-feet, and collects water from a drainage area of 18 square miles. Completed in 1901, the structure is over a century 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/09/2021.
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Location
| State | New Hampshire |
| County | Merrimack |
| Nearest City | Franklin |
| River/Stream | Chance Pond Brook |
| Coordinates | 43.44474, -71.66089 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 178 ft |
| Year Completed | 1901 (125 years old) |
Storage & Hydraulics
| NID Storage | 1 acre-ft |
| Max Storage | 1 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 18 sq mi |
| Max Discharge | 659 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | 174 N MAIN ST FRANLIN LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 06/09/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NH03736 |
| Federal ID | NH03736 |
| More Info | State Dam Safety Program |