US Bridges

TR 203 over Tributary Mackinaw R

Good

McLean County, Illinois · 4.8 MI Wsw Colfax · Structure no. 057502500000000

Built
1981
44 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
100
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 203 over Tributary Mackinaw R is a concrete continuous culvert carrying TR 203 over Tributary Mackinaw R in McLean County, Illinois. It was built in 1981, so it is 44 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 100 vehicles a day, roughly 20% of them trucks, projected to reach 76 by 2046. The structure is 33 ft (10.1 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 203
CrossesTributary Mackinaw R
Location4.8 MI Wsw Colfax
RouteCounty Highway 0
Coordinates40.54467, -88.68795
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic76 by 2046
Trucks20%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 203 over Tributary Mackinaw R built?

It was built in 1981, making it 44 years old in 2025.

What condition is TR 203 over Tributary Mackinaw R 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 2024.

How much traffic does TR 203 over Tributary Mackinaw R carry?

About 100 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is TR 203 over Tributary Mackinaw R?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns TR 203 over Tributary Mackinaw R?

It is owned by the Town or Township Highway Agency.