US Bridges

RTE I87 over West Mill Brook

Fair

Essex County, New York · I87 4.3 MI S Exit 30 · Structure no. 000000001033722

Built
1965
60 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
129 ft
1 main span
Daily traffic
5,019
2014 count
Owner
State
State Highway Agency

About this bridge

RTE I87 over West Mill Brook is a steel stringer/multi-beam or girder carrying RTE I87 over West Mill Brook in Essex County, New York. It was built in 1965, so it is 60 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 5,019 vehicles a day, roughly 26% of them trucks, projected to reach 5,977 by 2041. The structure is 129 ft (39.3 m) long and 42 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

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CarriesRTE I87
CrossesWest Mill Brook
LocationI87 4.3 MI S Exit 30
RouteInterstate 87
CountyEssex County
StateNew York
Coordinates44.0243, -73.69993
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length129 ft (39.3 m)
Longest span125 ft (38.1 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,019 (2014)
Projected traffic5,977 by 2041
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$2.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I87 over West Mill Brook built?

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

What condition is RTE I87 over West Mill Brook 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 April 2024.

How much traffic does RTE I87 over West Mill Brook carry?

About 5,019 vehicles per day (2014 count), of which roughly 26% are trucks.

How long is RTE I87 over West Mill Brook?

The structure is 129 ft (39.3 m) long with a longest span of 125 ft (38.1 m) and a deck 42 ft wide.

Who owns RTE I87 over West Mill Brook?

It is owned by the State Highway Agency.