US Bridges

TR 75 over Mackinaw River

Good

Tazewell County, Illinois · CTR-4-T24NR2W · Structure no. 090320900000000

Built
1993
32 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
260 ft
3 main spans
Daily traffic
100
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 75 over Mackinaw River is a steel continuous stringer/multi-beam or girder carrying TR 75 over Mackinaw River in Tazewell County, Illinois. It was built in 1993, so it is 32 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 100 vehicles a day, roughly 40% of them trucks, projected to reach 101 by 2046. The structure is 260 ft (79.2 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesTR 75
CrossesMackinaw River
LocationCTR-4-T24NR2W
RouteCounty Highway 0
CountyTazewell County
StateIllinois
Coordinates40.563, -89.33262
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span100 ft (30.5 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic101 by 2046
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 75 over Mackinaw River built?

It was built in 1993, making it 32 years old in 2025.

What condition is TR 75 over 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 January 2023.

How much traffic does TR 75 over Mackinaw River carry?

About 100 vehicles per day (2023 count), of which roughly 40% are trucks.

How long is TR 75 over Mackinaw River?

The structure is 260 ft (79.2 m) long with a longest span of 100 ft (30.5 m) and a deck 30 ft wide.

Who owns TR 75 over Mackinaw River?

It is owned by the Town or Township Highway Agency.