Route 25 No. 1 Dam
Route 25 No. 1 Dam is an earth dam located in Plymouth County, Massachusetts, built in 1964. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Route 25 No. 1 Dam
The primary purpose of Route 25 No. 1 Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ma Department Of Transportation (state). It impounds the Unnamed Tributary Of Weweantic River near Wareham.
The dam stands 16 feet tall and stretches 650 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 800 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 02/08/2023.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Massachusetts dam safety program can provide more specific information about emergency planning for this structure.
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 | Wareham |
| River/Stream | Unnamed Tributary Of Weweantic River |
| Coordinates | 41.79625, -70.75448 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Length | 650 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 800 acre-ft |
| Max Storage | 800 acre-ft |
| Normal Storage | 50 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 250 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | MA Department of Transportation |
| Owner Type | State |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 02/08/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MA02560 |
| Federal ID | MA02560 |
| More Info | State Dam Safety Program |