US Bridges

Illinois Ave over Lp 12

Fair

Dallas County, Texas · 1.20 MI NW of SP 303 · Structure no. 180570058102063

Built
1975
50 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
365 ft
3 main spans
Daily traffic
16,158
2019 count
Owner
State
State Highway Agency

About this bridge

Illinois Ave over Lp 12 is a prestressed concrete stringer/multi-beam or girder carrying Illinois Ave over Lp 12 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 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 16,158 vehicles a day, projected to reach 1,000 by 2036. The structure is 365 ft (111.3 m) long and 94 ft wide.

Location

Open in Google Maps
CarriesIllinois Ave
CrossesLp 12
Location1.20 MI NW of SP 303
RouteCity Street 226
CountyDallas County
StateTexas
Coordinates32.72036, -96.91632
Functional classUrban Minor 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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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 (+1 approach)
Design loadHS 20
Structure length365 ft (111.3 m)
Longest span105 ft (32 m)
Deck width94 ft (28.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,158 (2019)
Projected traffic1,000 by 2036
Trucks0%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Illinois Ave over Lp 12 built?

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

What condition is Illinois Ave over Lp 12 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 December 2023.

How much traffic does Illinois Ave over Lp 12 carry?

About 16,158 vehicles per day (2019 count).

How long is Illinois Ave over Lp 12?

The structure is 365 ft (111.3 m) long with a longest span of 105 ft (32 m) and a deck 94 ft wide.

Who owns Illinois Ave over Lp 12?

It is owned by the State Highway Agency.