Tolman
Tolman is a concrete dam located in Knox County, Maine, built in 1967. It carries a Significant hazard potential classification and has a poor condition assessment.
About Tolman
The primary purpose of Tolman is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Bizzy Pond Llc (private). It impounds the Oyster River near Rockport.
The dam stands 20 feet tall and stretches 250 feet across, creates a reservoir covering 38 acres, and has a maximum storage capacity of 160 acre-feet. Completed in 1967, the structure is well into its service life at over 50 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 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 07/09/2025.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Maine |
| County | Knox |
| Nearest City | Rockport |
| River/Stream | Oyster River |
| Coordinates | 44.17153, -69.15156 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 250 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 160 acre-ft |
| Max Storage | 160 acre-ft |
| Normal Storage | 128 acre-ft |
| Surface Area | 38 acres |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Bizzy Pond LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/09/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ME00023 |
| Federal ID | ME00023 |
| More Info | State Dam Safety Program |