Structure 1049430 · Suffolk County, NY

Motor Parkway Hp over 495i495i07031135 RTE I4

Carries Motor Parkway Hp over 495i495i07031135 RTE I4, .4 Mi W Jct Rts 454+495.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT243 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

243 ft end to end, longest span 79 ft: about 3 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.

Built1963rebuilt 2002
Length243.1 ft74.1 m
Daily traffic9,931counted 2020
Last inspectedFebruary 2024every 24 months

Location

StateNew York
CountySuffolk
Location.4 Mi W Jct Rts 454+495
CarriesMotor Parkway Hp
Crosses495i495i07031135 RTE I4
Coordinates40.80921, -73.19363

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length243.1 ft (74.1 m)
Max Span78.7 ft (24 m)
Deck Width89.9 ft (27.4 m)
Deck Area2030.3 sq m
Main Spans4
Year Built1963 (reconstructed 2002)

Traffic

Avg Daily Traffic9,931 (2020)
Truck Traffic7%
Lanes On Bridge6
Lanes Under Bridge8

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000001049430

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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