US Bridges

I 91 SB over RR Gwrr

Fair

Franklin County, Massachusetts · Mm 42.6 on I-91 SB · Structure no. G120580XDDOTNBI

Built
1964
61 years old, rebuilt 2007
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
251 ft
3 main spans
Daily traffic
15,600
2017 count
Owner
State
State Highway Agency

About this bridge

I 91 SB over RR Gwrr is a steel stringer/multi-beam or girder carrying I 91 SB over RR Gwrr in Franklin County, Massachusetts. It was built in 1964 and reconstructed in 2007, so it is 61 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 5 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 15,600 vehicles a day, roughly 10% of them trucks, projected to reach 45,400 by 2032. The structure is 251 ft (76.5 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 91 SB
CrossesRR Gwrr
LocationMm 42.6 on I-91 SB
RouteInterstate 91
CountyFranklin County
StateMassachusetts
Coordinates42.57878, -72.62133
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.5 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length251 ft (76.5 m)
Longest span99 ft (30.2 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,600 (2017)
Projected traffic45,400 by 2032
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$10.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 SB over RR Gwrr built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2007.

What condition is I 91 SB over RR Gwrr 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 April 2023.

How much traffic does I 91 SB over RR Gwrr carry?

About 15,600 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is I 91 SB over RR Gwrr?

The structure is 251 ft (76.5 m) long with a longest span of 99 ft (30.2 m) and a deck 44 ft wide.

Who owns I 91 SB over RR Gwrr?

It is owned by the State Highway Agency.