Structure 180430028102056 · Collin County, TX

SH 78 over East Fork Trinity River

Carries SH 78 over East Fork Trinity River, 1.3 Mi. W Of Jct. SH 205.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT425 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

425 ft end to end, longest span 80 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.

Built20179 years old
Length424.9 ft129.5 m
Daily traffic25,731counted 2020
Last inspectedOctober 2023every 24 months

Location

StateTexas
CountyCollin
Location1.3 Mi. W Of Jct. SH 205
CarriesSH 78
CrossesEast Fork Trinity River
Coordinates33.02338, -96.47588

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length424.9 ft (129.5 m)
Max Span80.1 ft (24.4 m)
Deck Width108.9 ft (33.2 m)
Deck Area4299.4 sq m
Main Spans6
Year Built2017

Traffic

Avg Daily Traffic25,731 (2020)
Truck Traffic7%
Lanes On Bridge6

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number180430028102056

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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