US Bridges

Ch 18 over Trib of Mud Creek

Fair

Shelby County, Illinois · W Edge of Henton · Structure no. 087300800000000

Built
1961
64 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
175
2024 count
Owner
County
County Highway Agency

About this bridge

Ch 18 over Trib of Mud Creek is a prestressed concrete box beam or girders - multiple carrying Ch 18 over Trib of Mud Creek in Shelby County, Illinois. It was built in 1961, so it is 64 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 175 vehicles a day, roughly 2% of them trucks, projected to reach 227 by 2046. The structure is 80 ft (24.5 m) long and 28 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesCh 18
CrossesTrib of Mud Creek
LocationW Edge of Henton
RouteCounty Highway 0
Coordinates39.46347, -88.90843
Functional classRural Minor 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.1 US tons
Inventory rating45.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 15
Structure length80 ft (24.5 m)
Longest span40 ft (12.1 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2024)
Projected traffic227 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 18 over Trib of Mud Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Ch 18 over Trib of Mud 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 March 2023.

How much traffic does Ch 18 over Trib of Mud Creek carry?

About 175 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Ch 18 over Trib of Mud Creek?

The structure is 80 ft (24.5 m) long with a longest span of 40 ft (12.1 m) and a deck 28 ft wide.

Who owns Ch 18 over Trib of Mud Creek?

It is owned by the County Highway Agency.