Crotched Mtn Storage Lagoon Dam is an earth dam located in Hillsborough, New Hampshire, built in 1989. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 15 ft15 ft tall and 2,200 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 Crotched Mtn Storage Lagoon Dam
Crotched Mtn Storage Lagoon Dam is a dam in Hillsborough, New Hampshire. The dam is owned by Crotched Mtn Resort and Spa (private). It impounds the Na near Francestown.
The dam stands 15 feet tall and stretches 2,200 feet across, creates a reservoir covering 2 acres, and has a maximum storage capacity of 20 acre-feet. Completed in 1989, the structure is 37 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. The most recent inspection on record was 08/30/2022.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Francestown |
| River/Stream | Na |
| Coordinates | 43.02261, -71.86390 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 2,200 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 2 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Crotched Mtn Resort and Spa |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/30/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00981 |
| Federal ID | NH00981 |
| More Info | State Dam Safety Program |