Structure 2001A001 · Kent County, DE

Dupont Hwy/us13 over Mill Creek

Carries Dupont Hwy/us13 over Mill Creek, Smyrna.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT47 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

47 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 slab bridge.

Built194086 years old
Length46.6 ft14.2 m
Daily traffic23,499counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateDelaware
CountyKent
LocationSmyrna
CarriesDupont Hwy/us13
CrossesMill Creek
Coordinates39.29706, -75.59981

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length46.6 ft (14.2 m)
Max Span40.0 ft (12.2 m)
Deck Width83.0 ft (25.3 m)
Deck Area359.3 sq m
Main Spans1
Year Built1940

Traffic

Avg Daily Traffic23,499 (2023)
Truck Traffic8%
Lanes On Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number2001A001

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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