US Bridges

Ch 42 over Trib Spring Creek

Fair

Iroquois County, Illinois · 2.1 MI N US 24 · Structure no. 038390800000000

Built
1972
53 years old
Condition
Fair
inspected October 2023
Type
Channel Beam
Concrete
Length
68 ft
3 main spans
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

Ch 42 over Trib Spring Creek is a concrete channel beam carrying Ch 42 over Trib Spring Creek in Iroquois County, Illinois. It was built in 1972, so it is 53 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 44% of them trucks, projected to reach 76 by 2046. The structure is 68 ft (20.7 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCh 42
CrossesTrib Spring Creek
Location2.1 MI N US 24
RouteCounty Highway 0
Coordinates40.79983, -87.9216
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic76 by 2046
Trucks44%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ch 42 over Trib Spring Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Ch 42 over Trib Spring Creek 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 October 2023.

How much traffic does Ch 42 over Trib Spring Creek carry?

About 75 vehicles per day (2022 count), of which roughly 44% are trucks.

How long is Ch 42 over Trib Spring Creek?

The structure is 68 ft (20.7 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Ch 42 over Trib Spring Creek?

It is owned by the County Highway Agency.