US Bridges

987D Ramp to Marbl over Saw Mill River

Fair

Westchester County, New York · 4.7 MI SE of Ossining · Structure no. 000000005500842

Built
1949
76 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
3 main spans
Daily traffic
3,023
2016 count
Owner
State
State Highway Agency

About this bridge

987D Ramp to Marbl over Saw Mill River is a steel stringer/multi-beam or girder carrying 987D Ramp to Marbl over Saw Mill River in Westchester County, New York. It was built in 1949, so it is 76 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 5 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 3,023 vehicles a day, roughly 15% of them trucks, projected to reach 4,264 by 2041. The structure is 58 ft (17.7 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
Carries987D Ramp to Marbl
CrossesSaw Mill River
Location4.7 MI SE of Ossining
CountyWestchester County
StateNew York
Coordinates41.12423, -73.78363
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating95 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length58 ft (17.7 m)
Longest span23 ft (7 m)
Deck width36 ft (11.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,023 (2016)
Projected traffic4,264 by 2041
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 987D Ramp to Marbl over Saw Mill River built?

It was built in 1949, making it 76 years old in 2025.

What condition is 987D Ramp to Marbl 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 June 2024.

How much traffic does 987D Ramp to Marbl over Saw Mill River carry?

About 3,023 vehicles per day (2016 count), of which roughly 15% are trucks.

How long is 987D Ramp to Marbl over Saw Mill River?

The structure is 58 ft (17.7 m) long with a longest span of 23 ft (7 m) and a deck 36 ft wide.

Who owns 987D Ramp to Marbl over Saw Mill River?

It is owned by the State Highway Agency.