US Bridges

RTE I87 over RTE 987 Saw Mill River

Fair

Westchester County, New York · Saw Mill R & Nycrr & Prkw · Structure no. 000000005513909

Built
1953
72 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
769 ft
7 main spans
Daily traffic
55,605
2018 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE I87 over RTE 987 Saw Mill River is a steel stringer/multi-beam or girder carrying RTE I87 over RTE 987 Saw Mill River in Westchester County, New York. It was built in 1953, 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 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 55,605 vehicles a day, roughly 19% of them trucks, projected to reach 94,161 by 2041. The structure is 769 ft (234.4 m) long and 113 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE I87
CrossesRTE 987 Saw Mill River
LocationSaw Mill R & Nycrr & Prkw
RouteInterstate 87
CountyWestchester County
StateNew York
Coordinates41.04334, -73.83586
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadHS 25 or greater
Structure length769 ft (234.4 m)
Longest span124 ft (37.8 m)
Deck width113 ft (34.5 m)
Roadway width104 ft (31.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,605 (2018)
Projected traffic94,161 by 2041
Trucks19%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
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$62.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I87 over RTE 987 Saw Mill River built?

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

What condition is RTE I87 over RTE 987 Saw Mill River 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 December 2024.

How much traffic does RTE I87 over RTE 987 Saw Mill River carry?

About 55,605 vehicles per day (2018 count), of which roughly 19% are trucks.

How long is RTE I87 over RTE 987 Saw Mill River?

The structure is 769 ft (234.4 m) long with a longest span of 124 ft (37.8 m) and a deck 113 ft wide.

Who owns RTE I87 over RTE 987 Saw Mill River?

It is owned by the State Toll Authority.