HWY South Rotary over ST 99 Sullivan Sq Undrps
FairSuffolk County, Massachusetts · 1.6 KM N of N Wshngton ST · Structure no. B1624537VMUNNBI
- Built
- 1951
- 74 years old
- Condition
- Fair
- inspected February 2024
- Type
- Frame
- Concrete
- Length
- 62 ft
- 1 main span
- Daily traffic
- 27,025
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
HWY South Rotary over ST 99 Sullivan Sq Undrps is a concrete frame carrying HWY South Rotary over ST 99 Sullivan Sq Undrps in Suffolk County, Massachusetts. It was built in 1951, so it is 74 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 27,025 vehicles a day, roughly 13% of them trucks, projected to reach 41,378 by 2033. The structure is 62 ft (18.9 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was HWY South Rotary over ST 99 Sullivan Sq Undrps built?
It was built in 1951, making it 74 years old in 2025.
What condition is HWY South Rotary over ST 99 Sullivan Sq Undrps 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 February 2024.
How much traffic does HWY South Rotary over ST 99 Sullivan Sq Undrps carry?
About 27,025 vehicles per day (2024 count), of which roughly 13% are trucks.
How long is HWY South Rotary over ST 99 Sullivan Sq Undrps?
The structure is 62 ft (18.9 m) long with a longest span of 62 ft (18.9 m) and a deck 64 ft wide.
Who owns HWY South Rotary over ST 99 Sullivan Sq Undrps?
It is owned by the City or Municipal Highway Agency.