HWY Plimpton ST over Water Neponset River
FairNorfolk County, Massachusetts · .3 MI SE of RTE 1A · Structure no. W030233KDMUNNBI
- Built
- 1925
- 100 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 5,286
- 2023 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
HWY Plimpton ST over Water Neponset River is a steel stringer/multi-beam or girder carrying HWY Plimpton ST over Water Neponset River in Norfolk County, Massachusetts. It was built in 1925, so it is 100 years old, older than the Massachusetts average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 5,286 vehicles a day, roughly 9% of them trucks, projected to reach 5,528 by 2032. The structure is 30 ft (9.1 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY Plimpton ST over Water Neponset River built?
It was built in 1925, making it 100 years old in 2025.
What condition is HWY Plimpton ST over Water Neponset River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does HWY Plimpton ST over Water Neponset River carry?
About 5,286 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is HWY Plimpton ST over Water Neponset River?
The structure is 30 ft (9.1 m) long with a longest span of 11 ft (3.4 m) and a deck 20 ft wide.
Who owns HWY Plimpton ST over Water Neponset River?
It is owned by the Town or Township Highway Agency.