US Bridges

Twp RD TR 434 over FAI 80

Fair

LaSalle County, Illinois · 1.8 MI E Marseil RD · Structure no. 050013300000000

Built
1960
65 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
199 ft
4 main spans
Daily traffic
75
2016 count
Owner
State
State Highway Agency

About this bridge

Twp RD TR 434 over FAI 80 is a prestressed concrete stringer/multi-beam or girder carrying Twp RD TR 434 over FAI 80 in LaSalle County, Illinois. It was built in 1960, so it is 65 years old, older than the Illinois average of 45.3 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 75 vehicles a day, projected to reach 76 by 2046. The structure is 199 ft (60.7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTwp RD TR 434
CrossesFAI 80
Location1.8 MI E Marseil RD
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.37548, -88.67108
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.3 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length199 ft (60.7 m)
Longest span56 ft (17.1 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2016)
Projected traffic76 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Twp RD TR 434 over FAI 80 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Twp RD TR 434 over FAI 80 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 2024.

How much traffic does Twp RD TR 434 over FAI 80 carry?

About 75 vehicles per day (2016 count).

How long is Twp RD TR 434 over FAI 80?

The structure is 199 ft (60.7 m) long with a longest span of 56 ft (17.1 m) and a deck 30 ft wide.

Who owns Twp RD TR 434 over FAI 80?

It is owned by the State Highway Agency.