US Bridges

Lp 12 over IH 45

Fair

Dallas County, Texas · 3.1 MI N of IH 20 · Structure no. 180570009214249

Built
1975
50 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
413 ft
3 main spans
Daily traffic
26,510
2022 count
Owner
State
State Highway Agency

About this bridge

Lp 12 over IH 45 is a prestressed concrete stringer/multi-beam or girder carrying Lp 12 over IH 45 in Dallas County, Texas. It was built in 1975, so it is 50 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 5 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 26,510 vehicles a day, roughly 6% of them trucks, projected to reach 40,840 by 2035. The structure is 413 ft (125.9 m) long and 129 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLp 12
CrossesIH 45
Location3.1 MI N of IH 20
RouteState Highway 12
CountyDallas County
StateTexas
Coordinates32.70065, -96.75359
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: 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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+3 approach)
Design loadHS 20
Structure length413 ft (125.9 m)
Longest span97 ft (29.6 m)
Deck width129 ft (39.3 m)
Roadway width127 ft (38.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,510 (2022)
Projected traffic40,840 by 2035
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 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 over IH 45 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Lp 12 over IH 45 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 November 2023.

How much traffic does Lp 12 over IH 45 carry?

About 26,510 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Lp 12 over IH 45?

The structure is 413 ft (125.9 m) long with a longest span of 97 ft (29.6 m) and a deck 129 ft wide.

Who owns Lp 12 over IH 45?

It is owned by the State Highway Agency.