Structure 1014720 · Orleans County, NY

RTE 18 over Oak Orchard Creek

Carries RTE 18 over Oak Orchard Creek, Jct Rte18+0ak Orchard Ck.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT326 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 6/9

326 ft end to end: about 5 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 through truss.

Built1936rebuilt 1998
Length326.1 ft99.4 m
Daily traffic1,418counted 2019
Last inspectedSeptember 2024every 12 months

Location

StateNew York
CountyOrleans
LocationJct Rte18+0ak Orchard Ck
CarriesRTE 18
CrossesOak Orchard Creek
Coordinates43.35203, -78.19327

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length326.1 ft (99.4 m)
Max Span319.9 ft (97.5 m)
Deck Width28.9 ft (8.8 m)
Deck Area874.7 sq m
Main Spans1
Year Built1936 (reconstructed 1998)

Traffic

Avg Daily Traffic1,418 (2019)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000001014720

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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