US Bridges

Lp 12 SB over Dart & BNSF RR

Fair

Dallas County, Texas · 0.10 MI SE of SP 303 · Structure no. 180570058102014

Built
1948
77 years old, rebuilt 1968
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
230 ft
5 main spans
Daily traffic
3,639
2023 count
Owner
State
State Highway Agency

About this bridge

Lp 12 SB over Dart & BNSF RR is a steel stringer/multi-beam or girder carrying Lp 12 SB over Dart & BNSF RR in Dallas County, Texas. It was built in 1948 and reconstructed in 1968, 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 3,639 vehicles a day, roughly 2% of them trucks, projected to reach 7,590 by 2033. The structure is 230 ft (70.1 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLp 12 SB
CrossesDart & BNSF RR
Location0.10 MI SE of SP 303
RouteState Highway 12
CountyDallas County
StateTexas
Coordinates32.70483, -96.90306
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadOther
Structure length230 ft (70.1 m)
Longest span52 ft (15.9 m)
Deck width52 ft (15.8 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,639 (2023)
Projected traffic7,590 by 2033
Trucks2%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Lp 12 SB over Dart & BNSF RR built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1968.

What condition is Lp 12 SB over Dart & BNSF RR 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 January 2024.

How much traffic does Lp 12 SB over Dart & BNSF RR carry?

About 3,639 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Lp 12 SB over Dart & BNSF RR?

The structure is 230 ft (70.1 m) long with a longest span of 52 ft (15.9 m) and a deck 52 ft wide.

Who owns Lp 12 SB over Dart & BNSF RR?

It is owned by the State Highway Agency.