Structure 1102 000 · New Castle County, DE

Auburn Heights Lot over Mill Race

Carries Auburn Heights Lot over Mill Race, Yorklynn.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

48 ft end to end, longest span 26 ft. 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.

Built20197 years old
Length47.6 ft14.5 m
Daily traffic99counted 2022
Last inspectedNovember 2023every 24 months

Location

StateDelaware
CountyNew Castle
LocationYorklynn
CarriesAuburn Heights Lot
CrossesMill Race
Coordinates39.80708, -75.68003

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length47.6 ft (14.5 m)
Max Span25.9 ft (7.9 m)
Deck Width37.1 ft (11.3 m)
Deck Area163.8 sq m
Main Spans2
Year Built2019

Traffic

Avg Daily Traffic99 (2022)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Park/Forest Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number1102 000

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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