Structure 180570009513391 · Dallas County, TX

IH 20 EB over IH 635 Conn C

Carries IH 20 EB over IH 635 Conn C, 0.7 Mi N Of US 175.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT342 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

342 ft end to end, longest span 75 ft: about 5 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 multi-beam bridge.

Built198739 years old
Length341.9 ft104.2 m
Daily traffic24,731counted 2019
Last inspectedAugust 2023every 48 months

Location

StateTexas
CountyDallas
Location0.7 Mi N Of US 175
CarriesIH 20 EB
CrossesIH 635 Conn C
Coordinates32.69982, -96.62674

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length341.9 ft (104.2 m)
Max Span75.1 ft (22.9 m)
Deck Width45.9 ft (14 m)
Deck Area1458.8 sq m
Main Spans6
Year Built1987

Traffic

Avg Daily Traffic24,731 (2019)
Truck Traffic21%
Lanes On Bridge2
Lanes Under Bridge3

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number180570009513391

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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