Structure 180570000911347 · Dallas County, TX

IH 45 NB Conn C over IH 30

Carries IH 45 NB Conn C over IH 30, 0.3 Mi E Of Preston ST.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT315 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 6/9Substructure 6/9

315 ft end to end, longest span 112 ft: about 4 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.

Built1961rebuilt 1971
Length315.0 ft96 m
Daily traffic—reported figure implausible
Last inspectedMarch 2024every 24 months

Location

StateTexas
CountyDallas
Location0.3 Mi E Of Preston ST
CarriesIH 45 NB Conn C
CrossesIH 30
Coordinates32.77881, -96.78217

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length315.0 ft (96 m)
Max Span111.9 ft (34.1 m)
Deck Width35.8 ft (10.9 m)
Deck Area1046.4 sq m
Main Spans4
Year Built1961 (reconstructed 1971)

Traffic

Avg Daily Traffic194,353 (2023)
That is about 97,176 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic17%
Lanes On Bridge2
Lanes Under Bridge8

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalNot applicable
Structure Number180570000911347

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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