Structure 180570237401408 · Dallas County, TX

Inwood RD NB over IH 635

Carries Inwood RD NB over IH 635, 2.2 Mi E Of Marsh LN.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,727 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

1,727 ft end to end, longest span 136 ft: about 4.8 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.

Built1985rebuilt 2018
Length1727.0 ft526.4 m
Daily traffic30,000counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateTexas
CountyDallas
Location2.2 Mi E Of Marsh LN
CarriesInwood RD NB
CrossesIH 635
Coordinates32.92351, -96.81915

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1727.0 ft (526.4 m)
Max Span136.2 ft (41.5 m)
Deck Width39.7 ft (12.1 m)
Deck Area6369.4 sq m
Main Spans3
Year Built1985 (reconstructed 2018)

Traffic

Avg Daily Traffic30,000 (2020)
Truck Traffic5%
Lanes On Bridge3
Lanes Under Bridge20

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number180570237401408

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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