US Bridges

New School Street over Saw Mill River

Fair

Westchester County, New York · 1.6 MI W. of Dunwoodie · Structure no. 000000002254790

Built
1916
109 years old
Condition
Fair
inspected April 2023
Type
Arch - Deck
Concrete
Length
87 ft
1 main span
Daily traffic
8,910
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

New School Street over Saw Mill River is a concrete arch - deck carrying New School Street over Saw Mill River in Westchester County, New York. It was built in 1916, so it is 109 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 6 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 8,910 vehicles a day, roughly 3% of them trucks, projected to reach 8,951 by 2041. The structure is 87 ft (26.5 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesNew School Street
CrossesSaw Mill River
Location1.6 MI W. of Dunwoodie
RouteCity Street 0
Coordinates40.9332, -73.89498
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating11.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadOther
Structure length87 ft (26.5 m)
Longest span65 ft (19.8 m)
Deck width60 ft (18.2 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,910 (2018)
Projected traffic8,951 by 2041
Trucks3%
Lanes on structure2
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$8.9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was New School Street over Saw Mill River built?

It was built in 1916, making it 109 years old in 2025.

What condition is New School Street over Saw Mill 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 April 2023.

How much traffic does New School Street over Saw Mill River carry?

About 8,910 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is New School Street over Saw Mill River?

The structure is 87 ft (26.5 m) long with a longest span of 65 ft (19.8 m) and a deck 60 ft wide.

Who owns New School Street over Saw Mill River?

It is owned by the City or Municipal Highway Agency.