Structure 1609A000 · New Castle County, DE

Fourth ST over Csx Railroad

Carries Fourth ST over Csx Railroad, Wilmington.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT75 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9Substructure 6/9 · sets the rating

75 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 multi-beam bridge.

Built1900rebuilt 1979
Length75.1 ft22.9 m
Daily traffic99counted 2022
Last inspectedApril 2024every 24 months

Location

StateDelaware
CountyNew Castle
LocationWilmington
CarriesFourth ST
CrossesCsx Railroad
Coordinates39.75115, -75.57764

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length75.1 ft (22.9 m)
Max Span69.9 ft (21.3 m)
Deck Width74.1 ft (22.6 m)
Deck Area517.5 sq m
Main Spans1
Year Built1900 (reconstructed 1979)

Traffic

Avg Daily Traffic99 (2022)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1609A000

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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