US Bridges

C.H. 12 over Trib Mackinaw River

Good

McLean County, Illinois · 3.2 MI Sse Clarksvil · Structure no. 057511300000000

Built
2013
12 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
350
2024 count
Owner
County
County Highway Agency

About this bridge

C.H. 12 over Trib Mackinaw River is a concrete culvert carrying C.H. 12 over Trib Mackinaw River in McLean County, Illinois. It was built in 2013, so it is 12 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 350 vehicles a day, roughly 10% of them trucks, projected to reach 328 by 2046. The structure is 26 ft (8 m) long and 40 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesC.H. 12
CrossesTrib Mackinaw River
Location3.2 MI Sse Clarksvil
RouteCounty Highway 0
Coordinates40.60413, -88.84397
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating50 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length26 ft (8 m)
Longest span13 ft (3.9 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2024)
Projected traffic328 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 C.H. 12 over Trib Mackinaw River built?

It was built in 2013, making it 12 years old in 2025.

What condition is C.H. 12 over Trib Mackinaw River 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 August 2023.

How much traffic does C.H. 12 over Trib Mackinaw River carry?

About 350 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is C.H. 12 over Trib Mackinaw River?

The structure is 26 ft (8 m) long with a longest span of 13 ft (3.9 m) and a deck 40 ft wide.

Who owns C.H. 12 over Trib Mackinaw River?

It is owned by the County Highway Agency.