US Bridges

I 93 NB/US1NB over ST 37 Granite ST

Fair

Norfolk County, Massachusetts · I 93 at ST 37 · Structure no. B21048356DOTNBI

Built
1957
68 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
106 ft
2 main spans
Daily traffic
96,316
2023 count
Owner
State
State Highway Agency

About this bridge

I 93 NB/US1NB over ST 37 Granite ST is a prestressed concrete stringer/multi-beam or girder carrying I 93 NB/US1NB over ST 37 Granite ST in Norfolk County, Massachusetts. It was built in 1957, so it is 68 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 96,316 vehicles a day, roughly 6% of them trucks, projected to reach 307,964 by 2031. The structure is 106 ft (32.3 m) long and 72 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI 93 NB/US1NB
CrossesST 37 Granite ST
LocationI 93 at ST 37
RouteInterstate 93
CountyNorfolk County
StateMassachusetts
Coordinates42.2228, -71.03087
Functional classUrban Principal Arterial - Interstate

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.7 US tons
Inventory rating37.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length106 ft (32.3 m)
Longest span52 ft (15.9 m)
Deck width72 ft (22 m)
Roadway width69 ft (21.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96,316 (2023)
Projected traffic307,964 by 2031
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$773,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 NB/US1NB over ST 37 Granite ST built?

It was built in 1957, making it 68 years old in 2025.

What condition is I 93 NB/US1NB over ST 37 Granite ST 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 June 2024.

How much traffic does I 93 NB/US1NB over ST 37 Granite ST carry?

About 96,316 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I 93 NB/US1NB over ST 37 Granite ST?

The structure is 106 ft (32.3 m) long with a longest span of 52 ft (15.9 m) and a deck 72 ft wide.

Who owns I 93 NB/US1NB over ST 37 Granite ST?

It is owned by the State Highway Agency.