US Bridges

CH-20 over Crooked Creek

Good

Marion County, Illinois · 2 MI NE Salem · Structure no. 061330300000000

Built
2008
17 years old
Condition
Good
inspected January 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

CH-20 over Crooked Creek is a prestressed concrete box beam or girders - multiple carrying CH-20 over Crooked Creek in Marion County, Illinois. It was built in 2008, so it is 17 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 500 vehicles a day, roughly 14% of them trucks, projected to reach 505 by 2046. The structure is 62 ft (18.8 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCH-20
CrossesCrooked Creek
Location2 MI NE Salem
RouteCounty Highway 0
CountyMarion County
StateIllinois
Coordinates38.66406, -88.90862
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span62 ft (18.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic505 by 2046
Trucks14%
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-20 over Crooked Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is CH-20 over Crooked 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 January 2022.

How much traffic does CH-20 over Crooked Creek carry?

About 500 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is CH-20 over Crooked Creek?

The structure is 62 ft (18.8 m) long with a longest span of 62 ft (18.8 m) and a deck 28 ft wide.

Who owns CH-20 over Crooked Creek?

It is owned by the County Highway Agency.