Lower Trio Pond Dam
Lower Trio Pond Dam is an earth dam located in Coos County, New Hampshire, built in 1936. It carries a Low hazard potential classification.
About Lower Trio Pond Dam
The primary purpose of Lower Trio Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Nh Fish And Game Department (state). It impounds the Pond Brook near Odell.
The dam stands 11 feet tall and stretches 120 feet across, creates a reservoir covering 69 acres, has a maximum storage capacity of 355 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1936, 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. The most recent inspection on record was 06/15/2022.
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Location
| State | New Hampshire |
| County | Coos |
| Nearest City | Odell |
| River/Stream | Pond Brook |
| Coordinates | 44.70880, -71.37020 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 120 ft |
| Year Completed | 1936 (90 years old) |
Storage & Hydraulics
| NID Storage | 355 acre-ft |
| Max Storage | 355 acre-ft |
| Normal Storage | 182 acre-ft |
| Surface Area | 69 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 367 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | NH FISH AND GAME DEPARTMENT |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 06/15/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NH00373 |
| Federal ID | NH00373 |
| More Info | State Dam Safety Program |