Structure 1068 235 · New Castle County, DE

Rockland RD over Wilson Run

Carries Rockland RD over Wilson Run, Rockland.

Overall conditionFair

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

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

25 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 box-beam bridge.

Built1925rebuilt 2005
Length24.6 ft7.5 m
Daily traffic64,449counted 2021
Last inspectedFebruary 2023every 24 months

Location

StateDelaware
CountyNew Castle
LocationRockland
CarriesRockland RD
CrossesWilson Run
Coordinates39.79692, -75.57561

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length24.6 ft (7.5 m)
Max Span21.3 ft (6.5 m)
Deck Width34.4 ft (10.5 m)
Deck Area78.8 sq m
Main Spans1
Year Built1925 (reconstructed 2005)

Traffic

Avg Daily Traffic64,449 (2021)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical8 — Stable, low risk
Structure Number1068 235

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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