US Bridges

Ch 19 FAS 270 over I-39/US 51

Fair

LaSalle County, Illinois · 2.3 MI N. of US 52 · Structure no. 050018100000000

Built
1971
54 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
301 ft
2 main spans
Daily traffic
600
2020 count
Owner
State
State Highway Agency

About this bridge

Ch 19 FAS 270 over I-39/US 51 is a steel continuous stringer/multi-beam or girder carrying Ch 19 FAS 270 over I-39/US 51 in LaSalle County, Illinois. It was built in 1971, so it is 54 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 600 vehicles a day, roughly 20% of them trucks, projected to reach 606 by 2046. The structure is 301 ft (91.7 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCh 19 FAS 270
CrossesI-39/US 51
Location2.3 MI N. of US 52
RouteCounty Highway 0
CountyLaSalle County
StateIllinois
Coordinates41.5043, -89.05026
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJanuary 2024
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 alignment7: Better than present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadH 20
Structure length301 ft (91.7 m)
Longest span125 ft (38 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2020)
Projected traffic606 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Ch 19 FAS 270 over I-39/US 51 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Ch 19 FAS 270 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 January 2024.

How much traffic does Ch 19 FAS 270 over I-39/US 51 carry?

About 600 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Ch 19 FAS 270 over I-39/US 51?

The structure is 301 ft (91.7 m) long with a longest span of 125 ft (38 m) and a deck 36 ft wide.

Who owns Ch 19 FAS 270 over I-39/US 51?

It is owned by the State Highway Agency.