US Bridges

RTE I87 over Mile Square Road

Fair

Westchester County, New York · 0.4 MI S JCT Rts I87&CCP · Structure no. 000000005513839

Built
1954
71 years old, rebuilt 1982
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
99 ft
1 main span
Daily traffic
75,846
2018 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE I87 over Mile Square Road is a steel stringer/multi-beam or girder carrying RTE I87 over Mile Square Road in Westchester County, New York. It was built in 1954 and reconstructed in 1982, so it is 71 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 75,846 vehicles a day, roughly 9% of them trucks, projected to reach 128,437 by 2041. The structure is 99 ft (30.2 m) long and 117 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE I87
CrossesMile Square Road
Location0.4 MI S JCT Rts I87&CCP
RouteInterstate 87
CountyWestchester County
StateNew York
Coordinates40.92521, -73.8583
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length99 ft (30.2 m)
Longest span94 ft (28.7 m)
Deck width117 ft (35.8 m)
Roadway width113 ft (34.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75,846 (2018)
Projected traffic128,437 by 2041
Trucks9%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn an Interstate toll segment under Secretarial agreement
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$17.2 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE I87 over Mile Square Road built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1982.

What condition is RTE I87 over Mile Square 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 August 2023.

How much traffic does RTE I87 over Mile Square Road carry?

About 75,846 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is RTE I87 over Mile Square Road?

The structure is 99 ft (30.2 m) long with a longest span of 94 ft (28.7 m) and a deck 117 ft wide.

Who owns RTE I87 over Mile Square Road?

It is owned by the State Toll Authority.