US Bridges

Lp 12 SB over Trinity Railway & Drain

Fair

Dallas County, Texas · 1.60 MI S of SH 183 · Structure no. 180570058102010

Built
1948
77 years old, rebuilt 1969
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
406 ft
8 main spans
Daily traffic
59,322
2023 count
Owner
State
State Highway Agency

About this bridge

Lp 12 SB over Trinity Railway & Drain is a steel stringer/multi-beam or girder carrying Lp 12 SB over Trinity Railway & Drain in Dallas County, Texas. It was built in 1948 and reconstructed in 1969, so it is 77 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 7% of them trucks, projected to reach 71,340 by 2033. The structure is 406 ft (123.7 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLp 12 SB
CrossesTrinity Railway & Drain
Location1.60 MI S of SH 183
RouteState Highway 12
CountyDallas County
StateTexas
Coordinates32.81443, -96.92183
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.
Superstructure7 GoodSome minor problems.
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 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 rating72 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans8 (+2 approach)
Design loadHS 20
Structure length406 ft (123.7 m)
Longest span46 ft (14 m)
Deck width66 ft (20.1 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,322 (2023)
Projected traffic71,340 by 2033
Trucks7%
Lanes on structure4
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$65,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Lp 12 SB over Trinity Railway & Drain built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1969.

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

About 59,322 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Lp 12 SB 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 66 ft wide.

Who owns Lp 12 SB over Trinity Railway & Drain?

It is owned by the State Highway Agency.