US Bridges

FAS 1365 - Ch 33 over I-39/US 51

Fair

LaSalle County, Illinois · 3 MI N of I-80 · Structure no. 050017500000000

Built
1977
48 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
257 ft
2 main spans
Daily traffic
625
2020 count
Owner
State
State Highway Agency

About this bridge

FAS 1365 - Ch 33 over I-39/US 51 is a prestressed concrete stringer/multi-beam or girder carrying FAS 1365 - Ch 33 over I-39/US 51 in LaSalle County, Illinois. It was built in 1977, so it is 48 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 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 625 vehicles a day, roughly 11% of them trucks, projected to reach 631 by 2046. The structure is 257 ft (78.3 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAS 1365 - Ch 33
CrossesI-39/US 51
Location3 MI N of I-80
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.41183, -89.05879
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length257 ft (78.3 m)
Longest span104 ft (31.7 m)
Deck width36 ft (10.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic625 (2020)
Projected traffic631 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 FAS 1365 - Ch 33 over I-39/US 51 built?

It was built in 1977, making it 48 years old in 2025.

What condition is FAS 1365 - Ch 33 over I-39/US 51 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 March 2023.

How much traffic does FAS 1365 - Ch 33 over I-39/US 51 carry?

About 625 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is FAS 1365 - Ch 33 over I-39/US 51?

The structure is 257 ft (78.3 m) long with a longest span of 104 ft (31.7 m) and a deck 36 ft wide.

Who owns FAS 1365 - Ch 33 over I-39/US 51?

It is owned by the State Highway Agency.