US Bridges

RTE 9 over Croton River

Fair

Westchester County, New York · 1.2 MI S JCT Rts 9 & 129 · Structure no. 000000001004972

Built
1998
27 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
485 ft
4 main spans
Daily traffic
23,374
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 9 over Croton River is a steel continuous stringer/multi-beam or girder carrying RTE 9 over Croton River in Westchester County, New York. It was built in 1998, so it is 27 years old, younger 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 23,374 vehicles a day, roughly 6% of them trucks, projected to reach 32,973 by 2041. The structure is 485 ft (147.7 m) long and 50 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesRTE 9
CrossesCroton River
Location1.2 MI S JCT Rts 9 & 129
RouteInterstate 9
Coordinates41.18814, -73.87539
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating52 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length485 ft (147.7 m)
Longest span120 ft (36.5 m)
Deck width50 ft (15.3 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,374 (2021)
Projected traffic32,973 by 2041
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$16.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 9 over Croton River built?

It was built in 1998, making it 27 years old in 2025.

What condition is RTE 9 over Croton 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 November 2024.

How much traffic does RTE 9 over Croton River carry?

About 23,374 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is RTE 9 over Croton River?

The structure is 485 ft (147.7 m) long with a longest span of 120 ft (36.5 m) and a deck 50 ft wide.

Who owns RTE 9 over Croton River?

It is owned by the State Highway Agency.