US Bridges

RTE I95 over Mamaroneck River

Good

Westchester County, New York · I-95 & Mamaroneck River · Structure no. 000000005514709

Built
1954
71 years old
Condition
Good
inspected May 2023
Type
Frame
Concrete
Length
63 ft
3 main spans
Daily traffic
92,162
2019 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE I95 over Mamaroneck River is a concrete frame carrying RTE I95 over Mamaroneck River in Westchester County, New York. It was built in 1954, so it is 71 years old, older than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 92,162 vehicles a day, roughly 15% of them trucks, projected to reach 156,067 by 2041. The structure is 63 ft (19.2 m) long and 116 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesRTE I95
CrossesMamaroneck River
LocationI-95 & Mamaroneck River
RouteInterstate 95
Coordinates40.96428, -73.73029
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating38 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span19 ft (5.8 m)
Deck width116 ft (35.4 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic92,162 (2019)
Projected traffic156,067 by 2041
Trucks15%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$7.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I95 over Mamaroneck River built?

It was built in 1954, making it 71 years old in 2025.

What condition is RTE I95 over Mamaroneck River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does RTE I95 over Mamaroneck River carry?

About 92,162 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is RTE I95 over Mamaroneck River?

The structure is 63 ft (19.2 m) long with a longest span of 19 ft (5.8 m) and a deck 116 ft wide.

Who owns RTE I95 over Mamaroneck River?

It is owned by the State Toll Authority.