US Bridges

Lp 12 SB over West Fork Trinity River

Fair

Dallas County, Texas · 1.1 MI N of IH 30 · Structure no. 180570058102073

Built
1976
49 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,845 ft
3 main spans
Daily traffic
67,772
2019 count
Owner
State
State Highway Agency

About this bridge

Lp 12 SB over West Fork Trinity River is a steel continuous stringer/multi-beam or girder carrying Lp 12 SB over West Fork Trinity River in Dallas County, Texas. It was built in 1976, so it is 49 years old, older 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 5 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 67,772 vehicles a day, roughly 7% of them trucks, projected to reach 78,100 by 2033. The structure is 2,845 ft (867.2 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLp 12 SB
CrossesWest Fork Trinity River
Location1.1 MI N of IH 30
RouteState Highway 12
CountyDallas County
StateTexas
Coordinates32.78572, -96.91881
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be 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
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+27 approach)
Design loadHS 20
Structure length2,845 ft (867.2 m)
Longest span340 ft (103.6 m)
Deck width62 ft (19 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,772 (2019)
Projected traffic78,100 by 2033
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lp 12 SB over West Fork Trinity River built?

It was built in 1976, making it 49 years old in 2025.

What condition is Lp 12 SB over West 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 February 2024.

How much traffic does Lp 12 SB over West Fork Trinity River carry?

About 67,772 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is Lp 12 SB over West Fork Trinity River?

The structure is 2,845 ft (867.2 m) long with a longest span of 340 ft (103.6 m) and a deck 62 ft wide.

Who owns Lp 12 SB over West Fork Trinity River?

It is owned by the State Highway Agency.