US Bridges

Old Saw Mill River over Saw Mill River

Fair

Westchester County, New York · 1.6 MI E of Tarrytown · Structure no. 000000002262350

Built
1930
95 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Masonry
Length
30 ft
1 main span
Daily traffic
10,004
2021 count
Owner
County
County Highway Agency

About this bridge

Old Saw Mill River over Saw Mill River is a masonry arch - deck carrying Old Saw Mill River over Saw Mill River in Westchester County, New York. It was built in 1930, so it is 95 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 10,004 vehicles a day, roughly 3% of them trucks, projected to reach 10,051 by 2041. The structure is 30 ft (9.1 m) long and 53 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

CarriesOld Saw Mill River
CrossesSaw Mill River
Location1.6 MI E of Tarrytown
Coordinates41.08017, -73.82738
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 inspectionMarch 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating77.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span26 ft (7.9 m)
Deck width53 ft (16.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,004 (2021)
Projected traffic10,051 by 2041
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5.6 mi (9 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$4.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Saw Mill River over Saw Mill River built?

It was built in 1930, making it 95 years old in 2025.

What condition is Old Saw Mill River 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 March 2023.

How much traffic does Old Saw Mill River over Saw Mill River carry?

About 10,004 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Old Saw Mill River over Saw Mill River?

The structure is 30 ft (9.1 m) long with a longest span of 26 ft (7.9 m) and a deck 53 ft wide.

Who owns Old Saw Mill River over Saw Mill River?

It is owned by the County Highway Agency.