US Bridges

RTE 907W over Mamaroneck River

Fair

Westchester County, New York · 0.1MI S JCT Rt 127 & Hrp · Structure no. 000000001074421

Built
1991
34 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
149 ft
1 main span
Daily traffic
—
2000 count
Owner
State
State Highway Agency

About this bridge

RTE 907W over Mamaroneck River is a steel stringer/multi-beam or girder carrying RTE 907W over Mamaroneck River in Westchester County, New York. It was built in 1991, so it is 34 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.

No traffic count is recorded. The structure is 149 ft (45.4 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE 907W
CrossesMamaroneck River
Location0.1MI S JCT Rt 127 & Hrp
CountyWestchester County
StateNew York
Coordinates40.98954, -73.73561
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating81 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length149 ft (45.4 m)
Longest span142 ft (43.2 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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$6.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 907W over Mamaroneck River built?

It was built in 1991, making it 34 years old in 2025.

What condition is RTE 907W over Mamaroneck 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 May 2023.

How much traffic does RTE 907W over Mamaroneck River carry?

No traffic count is recorded for this structure.

How long is RTE 907W over Mamaroneck River?

The structure is 149 ft (45.4 m) long with a longest span of 142 ft (43.2 m) and a deck 41 ft wide.

Who owns RTE 907W over Mamaroneck River?

It is owned by the State Highway Agency.