Structure 1027260 · St. Lawrence County, NY

RTE 56 over Raquette River

Carries RTE 56 over Raquette River, .5 Mi SW Village Of Colto.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT366 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

366 ft end to end, longest span 140 ft: 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 multi-beam bridge.

Built199630 years old
Length366.1 ft111.6 m
Daily traffic2,585counted 2020
Last inspectedOctober 2024every 24 months

Location

StateNew York
CountySt. Lawrence
Location.5 Mi SW Village Of Colto
CarriesRTE 56
CrossesRaquette River
Coordinates44.54865, -74.93383

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length366.1 ft (111.6 m)
Max Span139.8 ft (42.6 m)
Deck Width42.0 ft (12.8 m)
Deck Area1428.5 sq m
Main Spans3
Year Built1996

Traffic

Avg Daily Traffic2,585 (2020)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number000000001027260

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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