US Bridges

Ch 47 / 1200 N RD over FAI-57

Poor

Iroquois County, Illinois · 2.62 MI S Onarga Int · Structure no. 038008200000000

Built
1968
57 years old
Condition
Poor
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
225 ft
4 main spans
Daily traffic
150
2022 count
Owner
State
State Highway Agency

About this bridge

Ch 47 / 1200 N RD over FAI-57 is a steel continuous stringer/multi-beam or girder carrying Ch 47 / 1200 N RD over FAI-57 in Iroquois County, Illinois. It was built in 1968, so it is 57 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 150 vehicles a day, roughly 41% of them trucks, projected to reach 101 by 2046. The structure is 225 ft (68.6 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCh 47 / 1200 N RD
CrossesFAI-57
Location2.62 MI S Onarga Int
RouteCounty Highway 0
Coordinates40.67831, -88.03543
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55.7 US tons
Inventory rating37.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length225 ft (68.6 m)
Longest span69 ft (21 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic101 by 2046
Trucks41%
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 Ch 47 / 1200 N RD over FAI-57 built?

It was built in 1968, making it 57 years old in 2025.

What condition is Ch 47 / 1200 N RD over FAI-57 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2024.

How much traffic does Ch 47 / 1200 N RD over FAI-57 carry?

About 150 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is Ch 47 / 1200 N RD over FAI-57?

The structure is 225 ft (68.6 m) long with a longest span of 69 ft (21 m) and a deck 30 ft wide.

Who owns Ch 47 / 1200 N RD over FAI-57?

It is owned by the State Highway Agency.