Structure 1056049 · Suffolk County, NY

RTE 454 over Lirr-main Line

Carries RTE 454 over Lirr-main Line, 1.1 Mi SE Jct Rts 454+495.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT169 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 6/9

169 ft end to end, longest span 67 ft: about 2 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 tee-beam bridge.

Built195076 years old
Length169.0 ft51.5 m
Daily traffic34,464counted 2020
Last inspectedJune 2024every 24 months

Location

StateNew York
CountySuffolk
Location1.1 Mi SE Jct Rts 454+495
CarriesRTE 454
CrossesLirr-main Line
Coordinates40.79669, -73.17154

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length169.0 ft (51.5 m)
Max Span66.9 ft (20.4 m)
Deck Width68.6 ft (20.9 m)
Deck Area1076.3 sq m
Main Spans3
Year Built1950

Traffic

Avg Daily Traffic34,464 (2020)
Truck Traffic11%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000001056049

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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