Crystal Lake Dam
Crystal Lake Dam is an earth dam located in Grafton County, New Hampshire, built in 1910. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Crystal Lake Dam
The primary purpose of Crystal Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Des Water Division (state). It impounds the Crystal Lake Brook near Enfield.
The dam stands 22 feet tall and stretches 170 feet across, creates a reservoir covering 378 acres, has a maximum storage capacity of 4,560 acre-feet, and collects water from a drainage area of 13 square miles. Completed in 1910, 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 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 10/21/2020.
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Location
| State | New Hampshire |
| County | Grafton |
| Nearest City | Enfield |
| River/Stream | Crystal Lake Brook |
| Coordinates | 43.61160, -72.08360 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 170 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 4,560 acre-ft |
| Max Storage | 4,560 acre-ft |
| Normal Storage | 2,135 acre-ft |
| Surface Area | 378 acres |
| Drainage Area | 13 sq mi |
| Max Discharge | 2,404 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH DES WATER DIVISION |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/21/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NH00269 |
| Federal ID | NH00269 |
| More Info | State Dam Safety Program |