Structure 5523252 · Jefferson County, NY

RTE 81 over St.lawrence Rv.ch

Carries RTE 81 over St.lawrence Rv.ch, 5.0 Mi.nw Alexandria Bay.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT102 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

102 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 rigid-frame bridge.

Built195967 years old
Length102.0 ft31.1 m
Daily traffic2,005counted 2011
Last inspectedAugust 2023every 24 months

Location

StateNew York
CountyJefferson
Location5.0 Mi.nw Alexandria Bay
CarriesRTE 81
CrossesSt.lawrence Rv.ch
Coordinates44.34725, -75.98323

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length102.0 ft (31.1 m)
Max Span95.8 ft (29.2 m)
Deck Width54.5 ft (16.6 m)
Deck Area516.3 sq m
Main Spans1
Year Built1959

Traffic

Avg Daily Traffic2,005 (2011)
Truck Traffic45%
Lanes On Bridge3

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000005523252

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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