US Bridges

RTE 90I over Thayer Road

Fair

Montgomery County, New York · 04MI S JCT Rts 5S+160 · Structure no. 000000005038799

Built
1953
72 years old, rebuilt 1980
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
139 ft
3 main spans
Daily traffic
25,565
2020 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE 90I over Thayer Road is a steel stringer/multi-beam or girder carrying RTE 90I over Thayer Road in Montgomery County, New York. It was built in 1953 and reconstructed in 1980, so it is 72 years old, older than the New York average of 53 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 25,565 vehicles a day, roughly 28% of them trucks, projected to reach 28,435 by 2041. The structure is 139 ft (42.4 m) long and 113 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

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CarriesRTE 90I
CrossesThayer Road
Location04MI S JCT Rts 5S+160
RouteInterstate 90
CountyMontgomery County
StateNew York
Coordinates42.91867, -74.17709
Functional classRural 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span56 ft (17.1 m)
Deck width113 ft (34.4 m)
Roadway width110 ft (33.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,565 (2020)
Projected traffic28,435 by 2041
Trucks28%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed7.5 mi (12 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$5.6 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE 90I over Thayer Road built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1980.

What condition is RTE 90I over Thayer Road 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 September 2023.

How much traffic does RTE 90I over Thayer Road carry?

About 25,565 vehicles per day (2020 count), of which roughly 28% are trucks.

How long is RTE 90I over Thayer Road?

The structure is 139 ft (42.4 m) long with a longest span of 56 ft (17.1 m) and a deck 113 ft wide.

Who owns RTE 90I over Thayer Road?

It is owned by the State Toll Authority.