Silver Lake Dam
Silver Lake Dam is an earth dam located in Hillsborough, New Hampshire, built in 1930. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Silver Lake Dam
The primary purpose of Silver 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 Dncr (state). It impounds the Pennichuck Brook near Hollis.
The dam stands 8 feet tall and stretches 16 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 120 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 10/07/2021.
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Location
| State | New Hampshire |
| County | Hillsborough |
| Nearest City | Hollis |
| River/Stream | Pennichuck Brook |
| Coordinates | 42.76080, -71.59550 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 8 ft |
| Dam Height | 8 ft |
| Dam Length | 16.6 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 90 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH DNCR |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/07/2021 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH01056 |
| Federal ID | NH01056 |
| More Info | State Dam Safety Program |