US Bridges

HWY Plymouth ST over RR Mbta/Csx

Fair

Plymouth County, Massachusetts · MBTA MP32/010 · Structure no. M180074BVDOT634

Built
1977
48 years old
Condition
Fair
inspected January 2025
Type
Slab
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
2,328
2025 count
Owner
State
State Highway Agency

About this bridge

HWY Plymouth ST over RR Mbta/Csx is a prestressed concrete slab carrying HWY Plymouth ST over RR Mbta/Csx in Plymouth County, Massachusetts. It was built in 1977, so it is 48 years old, younger 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 2,328 vehicles a day, roughly 6% of them trucks, projected to reach 1,579 by 2032. The structure is 57 ft (17.4 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesHWY Plymouth ST
CrossesRR Mbta/Csx
LocationMBTA MP32/010
RouteCity Street 0
CountyPlymouth County
StateMassachusetts
Coordinates41.92701, -70.93451
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating55.7 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length57 ft (17.4 m)
Longest span52 ft (15.8 m)
Deck width41 ft (12.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,328 (2025)
Projected traffic1,579 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Plymouth ST over RR Mbta/Csx built?

It was built in 1977, making it 48 years old in 2025.

What condition is HWY Plymouth ST over RR Mbta/Csx 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 January 2025.

How much traffic does HWY Plymouth ST over RR Mbta/Csx carry?

About 2,328 vehicles per day (2025 count), of which roughly 6% are trucks.

How long is HWY Plymouth ST over RR Mbta/Csx?

The structure is 57 ft (17.4 m) long with a longest span of 52 ft (15.8 m) and a deck 41 ft wide.

Who owns HWY Plymouth ST over RR Mbta/Csx?

It is owned by the State Highway Agency.