ST109 Spring ST over Water Charles River
FairSuffolk County, Massachusetts · @ Dedham Tl = D05006 · Structure no. B161772KYDOTNBI
- Built
- 1861
- 164 years old, rebuilt 2002
- Condition
- Fair
- inspected November 2024
- Type
- Arch - Deck
- Concrete
- Length
- 125 ft
- 5 main spans
- Daily traffic
- 40,200
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
ST109 Spring ST over Water Charles River is a concrete arch - deck carrying ST109 Spring ST over Water Charles River in Suffolk County, Massachusetts. It was built in 1861 and reconstructed in 2002, so it is 164 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 6 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 40,200 vehicles a day, roughly 2% of them trucks, projected to reach 71,068 by 2031. The structure is 125 ft (38.1 m) long and 57 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 |
|---|---|---|
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 ST109 Spring ST over Water Charles River built?
It was built in 1861, making it 164 years old in 2025. It was reconstructed in 2002.
What condition is ST109 Spring ST over Water Charles 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 November 2024.
How much traffic does ST109 Spring ST over Water Charles River carry?
About 40,200 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is ST109 Spring ST over Water Charles River?
The structure is 125 ft (38.1 m) long with a longest span of 19 ft (5.8 m) and a deck 57 ft wide.
Who owns ST109 Spring ST over Water Charles River?
It is owned by the State Highway Agency.