Structure 1003 225 · New Castle County, DE

Thompson Bridge RD over Brandywine Creek

Carries Thompson Bridge RD over Brandywine Creek, E. Of Guyencourt.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT194 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

194 ft end to end, longest span 93 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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 box-beam bridge.

Built199036 years old
Length194.2 ft59.2 m
Daily traffic8,218counted 2021
Last inspectedMay 2022every 48 months

Location

StateDelaware
CountyNew Castle
LocationE. Of Guyencourt
CarriesThompson Bridge RD
CrossesBrandywine Creek
Coordinates39.81699, -75.56989

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length194.2 ft (59.2 m)
Max Span93.2 ft (28.4 m)
Deck Width46.9 ft (14.3 m)
Deck Area846.6 sq m
Main Spans2
Year Built1990

Traffic

Avg Daily Traffic8,218 (2021)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number1003 225

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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