US Bridges

RTE 9A over RTE 100

Fair

Westchester County, New York · 2.7 MI S JCT RTE 100+TSP · Structure no. 000000001054440

Built
1931
94 years old
Condition
Fair
inspected August 2024
Type
Frame
Concrete
Length
94 ft
1 main span
Daily traffic
35,998
2011 count
Owner
State
State Highway Agency

About this bridge

RTE 9A over RTE 100 is a concrete frame carrying RTE 9A over RTE 100 in Westchester County, New York. It was built in 1931, so it is 94 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 35,998 vehicles a day, roughly 5% of them trucks, projected to reach 36,167 by 2041. The structure is 94 ft (28.7 m) long and 48 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRTE 9A
CrossesRTE 100
Location2.7 MI S JCT RTE 100+TSP
RouteState Highway 9A
CountyWestchester County
StateNew York
Coordinates41.14973, -73.82557
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.4 US tons
Inventory rating23.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length94 ft (28.7 m)
Longest span75 ft (22.8 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,998 (2011)
Projected traffic36,167 by 2041
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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$6.6 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE 9A over RTE 100 built?

It was built in 1931, making it 94 years old in 2025.

What condition is RTE 9A over RTE 100 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 2024.

How much traffic does RTE 9A over RTE 100 carry?

About 35,998 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is RTE 9A over RTE 100?

The structure is 94 ft (28.7 m) long with a longest span of 75 ft (22.8 m) and a deck 48 ft wide.

Who owns RTE 9A over RTE 100?

It is owned by the State Highway Agency.