Structure 180570058102010 · Dallas County, TX

Lp 12 SB over Trinity Railway & Drain

Carries Lp 12 SB over Trinity Railway & Drain, 1.60 Mi S Of SH 183.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT406 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

406 ft end to end, longest span 46 ft: about 6 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.

Built1948rebuilt 1969
Length405.8 ft123.7 m
Daily traffic59,322counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateTexas
CountyDallas
Location1.60 Mi S Of SH 183
CarriesLp 12 SB
CrossesTrinity Railway & Drain
Coordinates32.81443, -96.92183

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length405.8 ft (123.7 m)
Max Span45.9 ft (14 m)
Deck Width65.9 ft (20.1 m)
Deck Area2486.4 sq m
Main Spans8
Year Built1948 (reconstructed 1969)

Traffic

Avg Daily Traffic59,322 (2023)
Truck Traffic7%
Lanes On Bridge4

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number180570058102010

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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