Structure 5500842 · Westchester County, NY

987d Ramp To Marbl over Saw Mill River

Carries 987d Ramp To Marbl over Saw Mill River, 4.7 Mi SE Of Ossining.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT58 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

58 ft end to end, longest span 23 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built194977 years old
Length58.1 ft17.7 m
Daily traffic3,023counted 2016
Last inspectedJune 2024every 24 months

Location

StateNew York
CountyWestchester
Location4.7 Mi SE Of Ossining
Carries987d Ramp To Marbl
CrossesSaw Mill River
Coordinates41.12423, -73.78363

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length58.1 ft (17.7 m)
Max Span23.0 ft (7 m)
Deck Width36.4 ft (11.1 m)
Deck Area196.5 sq m
Main Spans3
Year Built1949

Traffic

Avg Daily Traffic3,023 (2016)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number000000005500842

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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