US Bridges

Lp 12 over Trinity River

Fair

Dallas County, Texas · 0.70 MI NE of SH 310 · Structure no. 180570058101106

Built
2000
25 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
1,355 ft
2 main spans
Daily traffic
23,795
2022 count
Owner
State
State Highway Agency

About this bridge

Lp 12 over Trinity River is a steel stringer/multi-beam or girder carrying Lp 12 over Trinity River in Dallas County, Texas. It was built in 2000, so it is 25 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 23,795 vehicles a day, roughly 2% of them trucks, projected to reach 27,230 by 2033. The structure is 1,355 ft (413 m) long and 85 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLp 12
CrossesTrinity River
Location0.70 MI NE of SH 310
RouteState Highway 12
CountyDallas County
StateTexas
Coordinates32.70743, -96.73593
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
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
DeckConcrete, precast panels
Main spans2 (+10 approach)
Design loadHS 20
Structure length1,355 ft (413 m)
Longest span175 ft (53.3 m)
Deck width85 ft (25.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,795 (2022)
Projected traffic27,230 by 2033
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lp 12 over Trinity River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Lp 12 over 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 May 2024.

How much traffic does Lp 12 over Trinity River carry?

About 23,795 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Lp 12 over Trinity River?

The structure is 1,355 ft (413 m) long with a longest span of 175 ft (53.3 m) and a deck 85 ft wide.

Who owns Lp 12 over Trinity River?

It is owned by the State Highway Agency.