Structure 1031371 · Cortland County, NY

RTE I81 over Tioughnioga River

Carries RTE I81 over Tioughnioga River, Jct RTE 81i+tioughnioga R.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT407 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

407 ft end to end, longest span 81 ft: about 6 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.

Built1966rebuilt 2009
Length407.2 ft124.1 m
Daily traffic9,431counted 2008
Last inspectedSeptember 2024every 24 months

Location

StateNew York
CountyCortland
LocationJct RTE 81i+tioughnioga R
CarriesRTE I81
CrossesTioughnioga River
Coordinates42.60663, -76.15810

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length407.2 ft (124.1 m)
Max Span81.0 ft (24.7 m)
Deck Width35.1 ft (10.7 m)
Deck Area1327.9 sq m
Main Spans5
Year Built1966 (reconstructed 2009)

Traffic

Avg Daily Traffic9,431 (2008)
Truck Traffic31%
Lanes On Bridge2

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 Number000000001031371

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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