US Bridges

ST 27 Depot ST over RR Amtrak/Mbta

Good

Norfolk County, Massachusetts · At Railroad Station · Structure no. S09004ACYDOT634

Built
2002
23 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
245 ft
5 main spans
Daily traffic
23,275
2023 count
Owner
State
State Highway Agency

About this bridge

ST 27 Depot ST over RR Amtrak/Mbta is a prestressed concrete box beam or girders - multiple carrying ST 27 Depot ST over RR Amtrak/Mbta in Norfolk County, Massachusetts. It was built in 2002, so it is 23 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 23,275 vehicles a day, roughly 3% of them trucks, projected to reach 35,376 by 2033. The structure is 245 ft (74.7 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST 27 Depot ST
CrossesRR Amtrak/Mbta
LocationAt Railroad Station
RouteState Highway 27
CountyNorfolk County
StateMassachusetts
Coordinates42.1252, -71.18391
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.4 US tons
Inventory rating42.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length245 ft (74.7 m)
Longest span62 ft (18.8 m)
Deck width45 ft (13.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,275 (2023)
Projected traffic35,376 by 2033
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$7.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 27 Depot ST over RR Amtrak/Mbta built?

It was built in 2002, making it 23 years old in 2025.

What condition is ST 27 Depot ST over RR Amtrak/Mbta in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does ST 27 Depot ST over RR Amtrak/Mbta carry?

About 23,275 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is ST 27 Depot ST over RR Amtrak/Mbta?

The structure is 245 ft (74.7 m) long with a longest span of 62 ft (18.8 m) and a deck 45 ft wide.

Who owns ST 27 Depot ST over RR Amtrak/Mbta?

It is owned by the State Highway Agency.