Structure 1034350 · Cortland County, NY

RTE 392 over Gridley Creek

Carries RTE 392 over Gridley Creek, 1.6 Mi W Jct Rts 90 & 11.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 8/9

111 ft end to end. 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.

Built199630 years old
Length110.9 ft33.8 m
Daily traffic1,504counted 2021
Last inspectedApril 2024every 24 months

Location

StateNew York
CountyCortland
Location1.6 Mi W Jct Rts 90 & 11
CarriesRTE 392
CrossesGridley Creek
Coordinates42.49078, -76.09814

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length110.9 ft (33.8 m)
Max Span107.0 ft (32.6 m)
Deck Width32.2 ft (9.8 m)
Deck Area331.2 sq m
Main Spans1
Year Built1996

Traffic

Avg Daily Traffic1,504 (2021)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000001034350

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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