Structure 1805709D0470019 · Dallas County, TX

Dallas N Tollwy SB over Alpha Road

Carries Dallas N Tollwy SB over Alpha Road, 0.5 Mi N Of Lbj FWY.

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 FT252 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

252 ft end to end, longest span 96 ft: about 3 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.

Built198343 years old
Length252.0 ft76.8 m
Daily traffic112,278counted 2018
Last inspectedFebruary 2023every 48 months

Location

StateTexas
CountyDallas
Location0.5 Mi N Of Lbj FWY
CarriesDallas N Tollwy SB
CrossesAlpha Road
Coordinates32.93293, -96.82211

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length252.0 ft (76.8 m)
Max Span96.1 ft (29.3 m)
Deck Width55.4 ft (16.9 m)
Deck Area1297.9 sq m
Main Spans3
Year Built1983

Traffic

Avg Daily Traffic112,278 (2018)
Truck Traffic2%
Lanes On Bridge4
Lanes Under Bridge9

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 48 months
OwnerLocal Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1805709D0470019

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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