Structure 1073791 · Cattaraugus County, NY

RTE I86 over RTE 417 Allegheny River

Carries RTE I86 over RTE 417 Allegheny River, 6 Mi W Jct SH 16 & SH 417.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,941 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

1,941 ft end to end, longest span 180 ft: about 5.4 football fields. 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.

Built198838 years old
Length1940.9 ft591.6 m
Daily traffic6,049counted 2014
Last inspectedSeptember 2024every 24 months

Location

StateNew York
CountyCattaraugus
Location6 Mi W Jct SH 16 & SH 417
CarriesRTE I86
CrossesRTE 417 Allegheny River
Coordinates42.10146, -78.52239

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1940.9 ft (591.6 m)
Max Span179.8 ft (54.8 m)
Deck Width42.7 ft (13 m)
Deck Area7690.8 sq m
Main Spans13
Year Built1988

Traffic

Avg Daily Traffic6,049 (2014)
Truck Traffic17%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000001073791

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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