Structure 1057370 · Suffolk County, NY

Dix Hills Road over RTE 908g

Carries Dix Hills Road over RTE 908g, 1.1 Mi W Jct SH 231 & Nsp.

Overall conditionGood

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

How ratings work
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT49 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 7/9Substructure 7/9

49 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 deck arch.

Built194977 years old
Length48.9 ft14.9 m
Daily traffic2,994counted 2019
Last inspectedJanuary 2024every 24 months

Location

StateNew York
CountySuffolk
Location1.1 Mi W Jct SH 231 & Nsp
CarriesDix Hills Road
CrossesRTE 908g
Coordinates40.82533, -73.36451

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length48.9 ft (14.9 m)
Max Span44.0 ft (13.4 m)
Deck Width43.0 ft (13.1 m)
Deck Area195.2 sq m
Main Spans1
Year Built1949

Traffic

Avg Daily Traffic2,994 (2019)
Truck Traffic2%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000001057370

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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