US Bridges

Benson RD - TR 232 over Mackinaw R

Fair

Tazewell County, Illinois · SE-27-T24NR3W · Structure no. 090316000000000

Built
1971
54 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
410 ft
4 main spans
Daily traffic
150
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Benson RD - TR 232 over Mackinaw R is a steel continuous stringer/multi-beam or girder carrying Benson RD - TR 232 over Mackinaw R in Tazewell County, Illinois. It was built in 1971, so it is 54 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 5 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 150 vehicles a day, roughly 33% of them trucks, projected to reach 152 by 2046. The structure is 410 ft (125 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesBenson RD - TR 232
CrossesMackinaw R
LocationSE-27-T24NR3W
RouteCounty Highway 0
CountyTazewell County
StateIllinois
Coordinates40.50321, -89.42442
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating31.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length410 ft (125 m)
Longest span114 ft (34.7 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic152 by 2046
Trucks33%
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 Benson RD - TR 232 over Mackinaw R built?

It was built in 1971, making it 54 years old in 2025.

What condition is Benson RD - TR 232 over Mackinaw R 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 January 2024.

How much traffic does Benson RD - TR 232 over Mackinaw R carry?

About 150 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is Benson RD - TR 232 over Mackinaw R?

The structure is 410 ft (125 m) long with a longest span of 114 ft (34.7 m) and a deck 28 ft wide.

Who owns Benson RD - TR 232 over Mackinaw R?

It is owned by the Town or Township Highway Agency.