US Bridges

Il 111 over Bear Creek

Fair

Macoupin County, Illinois · 1.2M S JCT Il 108 · Structure no. 059001400000000

Built
1929
96 years old, rebuilt 1990
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
118 ft
3 main spans
Daily traffic
1,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 111 over Bear Creek is a steel continuous stringer/multi-beam or girder carrying Il 111 over Bear Creek in Macoupin County, Illinois. It was built in 1929 and reconstructed in 1990, so it is 96 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 1,000 vehicles a day, roughly 14% of them trucks, projected to reach 1,061 by 2046. The structure is 118 ft (36 m) long and 35 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesIl 111
CrossesBear Creek
Location1.2M S JCT Il 108
RouteState Highway 111
Coordinates39.27502, -90.04568
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.5 US tons
Inventory rating55.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length118 ft (36 m)
Longest span38 ft (11.7 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,061 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 111 over Bear Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1990.

What condition is Il 111 over Bear 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 July 2023.

How much traffic does Il 111 over Bear Creek carry?

About 1,000 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Il 111 over Bear Creek?

The structure is 118 ft (36 m) long with a longest span of 38 ft (11.7 m) and a deck 35 ft wide.

Who owns Il 111 over Bear Creek?

It is owned by the State Highway Agency.