Structure 180570009513394 · Dallas County, TX

IH 635 NB over IH 20 & IH 635 Conn

Carries IH 635 NB over IH 20 & IH 635 Conn, 0.75 Mi N Of US 175.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT861 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

861 ft end to end, longest span 132 ft: about 2.4 football fields. 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
Length860.9 ft262.4 m
Daily traffic13,874counted 2018
Last inspectedAugust 2023every 48 months

Location

StateTexas
CountyDallas
Location0.75 Mi N Of US 175
CarriesIH 635 NB
CrossesIH 20 & IH 635 Conn
Coordinates32.69923, -96.62629

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length860.9 ft (262.4 m)
Max Span131.9 ft (40.2 m)
Deck Width69.9 ft (21.3 m)
Deck Area5589.1 sq m
Main Spans10
Year Built1987

Traffic

Avg Daily Traffic13,874 (2018)
Truck Traffic14%
Lanes On Bridge4
Lanes Under Bridge7

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 Number180570009513394

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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