Structure 180570004707309 · Dallas County, TX

Sp 366 Conn over US 75

Carries Sp 366 Conn over US 75, US 75 & Sp 366 Intrchange.

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 FT1,197 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

1,197 ft end to end, longest span 161 ft: about 3.3 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.

Built199828 years old
Length1196.9 ft364.8 m
Daily traffic9,674counted 2022
Last inspectedMay 2024every 24 months

Location

StateTexas
CountyDallas
LocationUS 75 & Sp 366 Intrchange
CarriesSp 366 Conn
CrossesUS 75
Coordinates32.79701, -96.79246

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1196.9 ft (364.8 m)
Max Span161.1 ft (49.1 m)
Deck Width27.9 ft (8.5 m)
Deck Area3100.8 sq m
Main Spans4
Year Built1998

Traffic

Avg Daily Traffic9,674 (2022)
Truck Traffic2%
Lanes On Bridge1
Lanes Under Bridge14

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number180570004707309

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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