Lily Pond
Lily Pond is an earth dam located in Hancock County, Maine, built in 1948. It carries a Significant hazard potential classification and has a poor condition assessment.
About Lily Pond
The primary purpose of Lily Pond is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Island Heritage Trust (private). It impounds the Lily Brook.
The dam stands 11 feet tall and stretches 150 feet across, creates a reservoir covering 257 acres, has a maximum storage capacity of 1,100 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1948, the structure is well-established, with more than 75 years of service.
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. An emergency action plan is in place for this dam. The most recent inspection on record was 08/15/2024.
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Location
| State | Maine |
| County | Hancock |
| River/Stream | Lily Brook |
| Coordinates | 44.22753, -68.67316 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 150 ft |
| Year Completed | 1948 (78 years old) |
Storage & Hydraulics
| NID Storage | 1,100 acre-ft |
| Max Storage | 1,100 acre-ft |
| Normal Storage | 156 acre-ft |
| Surface Area | 257 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Island Heritage Trust |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 08/15/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ME00585 |
| Federal ID | ME00585 |
| More Info | State Dam Safety Program |