US Bridges

FAS 733(CH 20) over Macoupin Creek

Good

Macoupin County, Illinois · .76 MI S TR 205 · Structure no. 059330700000000

Built
2012
13 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
290 ft
3 main spans
Daily traffic
450
2021 count
Owner
County
County Highway Agency

About this bridge

FAS 733(CH 20) over Macoupin Creek is a steel continuous stringer/multi-beam or girder carrying FAS 733(CH 20) over Macoupin Creek in Macoupin County, Illinois. It was built in 2012, so it is 13 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 450 vehicles a day, roughly 11% of them trucks, projected to reach 455 by 2046. The structure is 290 ft (88.4 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFAS 733(CH 20)
CrossesMacoupin Creek
Location.76 MI S TR 205
RouteCounty Highway 0
CountyMacoupin County
StateIllinois
Coordinates39.30539, -89.78853
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length290 ft (88.4 m)
Longest span110 ft (33.5 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2021)
Projected traffic455 by 2046
Trucks11%
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 FAS 733(CH 20) over Macoupin Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is FAS 733(CH 20) over Macoupin Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does FAS 733(CH 20) over Macoupin Creek carry?

About 450 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is FAS 733(CH 20) over Macoupin Creek?

The structure is 290 ft (88.4 m) long with a longest span of 110 ft (33.5 m) and a deck 36 ft wide.

Who owns FAS 733(CH 20) over Macoupin Creek?

It is owned by the County Highway Agency.