US Bridges

I 91 SB over Comb I 91 Ramp & Gwrr

Fair

Hampshire County, Massachusetts · Mm 25.8 on I-91 SB · Structure no. N1906510BDOTNBI

Built
1963
62 years old, rebuilt 1989
Condition
Fair
inspected October 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
352 ft
4 main spans
Daily traffic
12,026
2016 count
Owner
State
State Highway Agency

About this bridge

I 91 SB over Comb I 91 Ramp & Gwrr is a steel stringer/multi-beam or girder carrying I 91 SB over Comb I 91 Ramp & Gwrr in Hampshire County, Massachusetts. It was built in 1963 and reconstructed in 1989, so it is 62 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 12,026 vehicles a day, roughly 5% of them trucks, projected to reach 60,013 by 2031. The structure is 352 ft (107.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 91 SB
CrossesComb I 91 Ramp & Gwrr
LocationMm 25.8 on I-91 SB
RouteInterstate 91
CountyHampshire County
StateMassachusetts
Coordinates42.33996, -72.63793
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2022
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 rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length352 ft (107.2 m)
Longest span104 ft (31.8 m)
Deck width45 ft (13.6 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,026 (2016)
Projected traffic60,013 by 2031
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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$14.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 SB over Comb I 91 Ramp & Gwrr built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1989.

What condition is I 91 SB over Comb I 91 Ramp & 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 October 2022.

How much traffic does I 91 SB over Comb I 91 Ramp & Gwrr carry?

About 12,026 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is I 91 SB over Comb I 91 Ramp & Gwrr?

The structure is 352 ft (107.2 m) long with a longest span of 104 ft (31.8 m) and a deck 45 ft wide.

Who owns I 91 SB over Comb I 91 Ramp & Gwrr?

It is owned by the State Highway Agency.