US Bridges

I 91 NB over HWY Damon RD

Fair

Hampshire County, Massachusetts · Mm 25.5 on I-91 NB · Structure no. N1906410CDOTNBI

Built
1965
60 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
152 ft
3 main spans
Daily traffic
14,078
2023 count
Owner
State
State Highway Agency

About this bridge

I 91 NB over HWY Damon RD is a steel stringer/multi-beam or girder carrying I 91 NB over HWY Damon RD in Hampshire County, Massachusetts. It was built in 1965, so it is 60 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 14,078 vehicles a day, roughly 11% of them trucks, projected to reach 19,031 by 2031. The structure is 152 ft (46.4 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 NB
CrossesHWY Damon RD
LocationMm 25.5 on I-91 NB
RouteInterstate 91
CountyHampshire County
StateMassachusetts
Coordinates42.33873, -72.63355
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length152 ft (46.4 m)
Longest span72 ft (22 m)
Deck width44 ft (13.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,078 (2023)
Projected traffic19,031 by 2031
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 NB over HWY Damon RD built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 91 NB over HWY Damon RD 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 August 2024.

How much traffic does I 91 NB over HWY Damon RD carry?

About 14,078 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is I 91 NB over HWY Damon RD?

The structure is 152 ft (46.4 m) long with a longest span of 72 ft (22 m) and a deck 44 ft wide.

Who owns I 91 NB over HWY Damon RD?

It is owned by the State Highway Agency.