US Bridges

SH 78 over East Fork Trinity River

Fair

Collin County, Texas · 1.3 Mi. W of Jct. SH 205 · Structure no. 180430028102056

Built
2017
8 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
425 ft
6 main spans
Daily traffic
25,731
2020 count
Owner
State
State Highway Agency

About this bridge

SH 78 over East Fork Trinity River is a prestressed concrete stringer/multi-beam or girder carrying SH 78 over East Fork Trinity River in Collin County, Texas. It was built in 2017, so it is 8 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 25,731 vehicles a day, roughly 7% of them trucks, projected to reach 38,082 by 2040. The structure is 425 ft (129.5 m) long and 109 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesSH 78
CrossesEast Fork Trinity River
Location1.3 Mi. W of Jct. SH 205
RouteState Highway 78
CountyCollin County
StateTexas
Coordinates33.02338, -96.47588
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length425 ft (129.5 m)
Longest span80 ft (24.4 m)
Deck width109 ft (33.2 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,731 (2020)
Projected traffic38,082 by 2040
Trucks7%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 78 over East Fork Trinity River built?

It was built in 2017, making it 8 years old in 2025.

What condition is SH 78 over East Fork Trinity River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does SH 78 over East Fork Trinity River carry?

About 25,731 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SH 78 over East Fork Trinity River?

The structure is 425 ft (129.5 m) long with a longest span of 80 ft (24.4 m) and a deck 109 ft wide.

Who owns SH 78 over East Fork Trinity River?

It is owned by the State Highway Agency.