US Bridges

Mamaroneck Road over Heathcote Bypass

Good

Westchester County, New York · 3.5 NE of Tuckahoe · Structure no. 000000002265310

Built
1992
33 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
118 ft
1 main span
Daily traffic
7,060
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mamaroneck Road over Heathcote Bypass is a steel stringer/multi-beam or girder carrying Mamaroneck Road over Heathcote Bypass in Westchester County, New York. It was built in 1992, so it is 33 years old, younger 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 7,060 vehicles a day, roughly 3% of them trucks, projected to reach 8,576 by 2041. The structure is 118 ft (36 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMamaroneck Road
CrossesHeathcote Bypass
Location3.5 NE of Tuckahoe
Coordinates40.99066, -73.76974
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101 US tons
Inventory rating60 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length118 ft (36 m)
Longest span115 ft (35 m)
Deck width35 ft (10.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,060 (2018)
Projected traffic8,576 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3.5 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mamaroneck Road over Heathcote Bypass built?

It was built in 1992, making it 33 years old in 2025.

What condition is Mamaroneck Road over Heathcote Bypass 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 Mamaroneck Road over Heathcote Bypass carry?

About 7,060 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Mamaroneck Road over Heathcote Bypass?

The structure is 118 ft (36 m) long with a longest span of 115 ft (35 m) and a deck 35 ft wide.

Who owns Mamaroneck Road over Heathcote Bypass?

It is owned by the Town or Township Highway Agency.