US Bridges

Mamaroneck Avenue over Sheldrake River

Good

Westchester County, New York · At Mamaroneck · Structure no. 000000002225090

Built
2005
20 years old
Condition
Good
inspected June 2024
Type
Arch - Deck
Concrete
Length
30 ft
1 main span
Daily traffic
18,056
2016 count
Owner
County
County Highway Agency

About this bridge

Mamaroneck Avenue over Sheldrake River is a concrete arch - deck carrying Mamaroneck Avenue over Sheldrake River in Westchester County, New York. It was built in 2005, so it is 20 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 18,056 vehicles a day, roughly 4% of them trucks, projected to reach 18,140 by 2041. The structure is 30 ft (9.1 m) long and 104 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesMamaroneck Avenue
CrossesSheldrake River
LocationAt Mamaroneck
RouteCounty Highway 0
Coordinates40.95343, -73.73811
Functional classUrban Other Principal Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108 US tons
Inventory rating65 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width104 ft (31.6 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,056 (2016)
Projected traffic18,140 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mamaroneck Avenue over Sheldrake River built?

It was built in 2005, making it 20 years old in 2025.

What condition is Mamaroneck Avenue over Sheldrake 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 June 2024.

How much traffic does Mamaroneck Avenue over Sheldrake River carry?

About 18,056 vehicles per day (2016 count), of which roughly 4% are trucks.

How long is Mamaroneck Avenue over Sheldrake River?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 104 ft wide.

Who owns Mamaroneck Avenue over Sheldrake River?

It is owned by the County Highway Agency.