US Bridges

Lp 12 over Trinity River Relief #1

Good

Dallas County, Texas · 1.0 MI NE of SH 310 · Structure no. 180570058101107

Built
2000
25 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
819 ft
7 main spans
Daily traffic
23,795
2022 count
Owner
State
State Highway Agency

About this bridge

Lp 12 over Trinity River Relief #1 is a prestressed concrete stringer/multi-beam or girder carrying Lp 12 over Trinity River Relief #1 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 23,795 vehicles a day, roughly 2% of them trucks, projected to reach 27,230 by 2033. The structure is 819 ft (249.6 m) long and 85 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesLp 12
CrossesTrinity River Relief #1
Location1.0 MI NE of SH 310
RouteState Highway 12
StateTexas
Coordinates32.70838, -96.73339
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length819 ft (249.6 m)
Longest span117 ft (35.7 m)
Deck width85 ft (25.9 m)
Roadway width83 ft (25.3 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
CrossesRelief for waterway
Detour if closed11.2 mi (18 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 Relief #1 built?

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

What condition is Lp 12 over Trinity River Relief #1 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does Lp 12 over Trinity River Relief #1 carry?

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

How long is Lp 12 over Trinity River Relief #1?

The structure is 819 ft (249.6 m) long with a longest span of 117 ft (35.7 m) and a deck 85 ft wide.

Who owns Lp 12 over Trinity River Relief #1?

It is owned by the State Highway Agency.