Sealund Reservoir Dam
Sealund Reservoir Dam is an earth dam located in Plymouth County, Massachusetts. It carries a Significant hazard potential classification and has a poor condition assessment.
About Sealund Reservoir Dam
The primary purpose of Sealund Reservoir Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Royson Properties, Llc (private). It impounds the Smelt Brook near Kingston.
The dam stands 14 feet tall and stretches 190 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 30 acre-feet, and collects water from a drainage area of 1 square miles.
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. The most recent inspection on record was 05/27/2021.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Massachusetts |
| County | Plymouth |
| Nearest City | Kingston |
| River/Stream | Smelt Brook |
| Coordinates | 41.97518, -70.71809 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Length | 190 ft |
Storage & Hydraulics
| NID Storage | 30 acre-ft |
| Max Storage | 30 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 50 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | Royson Properties, LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/27/2021 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MA02137 |
| Federal ID | MA02137 |
| More Info | State Dam Safety Program |