US Bridges

Lp 12 NB over Trinity Railway & Drain

Fair

Dallas County, Texas · 1.60 MI S of SH 183 · Structure no. 180570058102398

Built
1969
56 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
406 ft
10 main spans
Daily traffic
59,322
2023 count
Owner
State
State Highway Agency

About this bridge

Lp 12 NB over Trinity Railway & Drain is a prestressed concrete stringer/multi-beam or girder carrying Lp 12 NB over Trinity Railway & Drain in Dallas County, Texas. It was built in 1969, so it is 56 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 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 59,322 vehicles a day, roughly 5% of them trucks, projected to reach 103,200 by 2036. The structure is 406 ft (123.7 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLp 12 NB
CrossesTrinity Railway & Drain
Location1.60 MI S of SH 183
RouteState Highway 12
StateTexas
Coordinates32.81443, -96.9216
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length406 ft (123.7 m)
Longest span46 ft (14 m)
Deck width58 ft (17.7 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,322 (2023)
Projected traffic103,200 by 2036
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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 NB over Trinity Railway & Drain built?

It was built in 1969, making it 56 years old in 2025.

What condition is Lp 12 NB over Trinity Railway & Drain 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 NB over Trinity Railway & Drain carry?

About 59,322 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Lp 12 NB over Trinity Railway & Drain?

The structure is 406 ft (123.7 m) long with a longest span of 46 ft (14 m) and a deck 58 ft wide.

Who owns Lp 12 NB over Trinity Railway & Drain?

It is owned by the State Highway Agency.