US Bridges

Twp RD 49A over I 57

Fair

Iroquois County, Illinois · 1.59 MI S Clifton in · Structure no. 038012800000000

Built
1966
59 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
256 ft
4 main spans
Daily traffic
75
2022 count
Owner
State
State Highway Agency

About this bridge

Twp RD 49A over I 57 is a steel continuous stringer/multi-beam or girder carrying Twp RD 49A over I 57 in Iroquois County, Illinois. It was built in 1966, so it is 59 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, roughly 13% of them trucks, projected to reach 76 by 2046. The structure is 256 ft (78.1 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTwp RD 49A
CrossesI 57
Location1.59 MI S Clifton in
RouteCounty Highway 0
Coordinates40.91374, -87.95092
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length256 ft (78.1 m)
Longest span78 ft (23.9 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic76 by 2046
Trucks13%
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 49A over I 57 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Twp RD 49A over I 57 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 Twp RD 49A over I 57 carry?

About 75 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Twp RD 49A over I 57?

The structure is 256 ft (78.1 m) long with a longest span of 78 ft (23.9 m) and a deck 30 ft wide.

Who owns Twp RD 49A over I 57?

It is owned by the State Highway Agency.