Structure 5502602 · Columbia County, NY

RTE 987g over Csx Trans/amtrak Stony

Carries RTE 987g over Csx Trans/amtrak Stony, 2.2 Mi SW Of E Chatham.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT250 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

250 ft end to end, longest span 110 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built196066 years old
Length249.7 ft76.1 m
Daily traffic1,868counted 2018
Last inspectedDecember 2024every 24 months

Location

StateNew York
CountyColumbia
Location2.2 Mi SW Of E Chatham
CarriesRTE 987g
CrossesCsx Trans/amtrak Stony
Coordinates42.39086, -73.55750

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length249.7 ft (76.1 m)
Max Span109.9 ft (33.5 m)
Deck Width36.1 ft (11 m)
Deck Area837.1 sq m
Main Spans3
Year Built1960

Traffic

Avg Daily Traffic1,868 (2018)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number000000005502602

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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