US Bridges

I-72 (wb) over TR 117 NS RR

Fair

Macon County, Illinois · 1 MI N Harristown · Structure no. 058007000000000

Built
1976
49 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
211 ft
2 main spans
Daily traffic
7,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-72 (wb) over TR 117 NS RR is a steel continuous stringer/multi-beam or girder carrying I-72 (wb) over TR 117 NS RR in Macon County, Illinois. It was built in 1976, so it is 49 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 7,000 vehicles a day, roughly 26% of them trucks, projected to reach 6,919 by 2046. The structure is 211 ft (64.3 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-72 (wb)
CrossesTR 117 NS RR
Location1 MI N Harristown
RouteInterstate 72
CountyMacon County
StateIllinois
Coordinates39.85333, -89.04565
Functional classUrban Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length211 ft (64.3 m)
Longest span88 ft (26.8 m)
Deck width50 ft (15.2 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic6,919 by 2046
Trucks26%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-72 (wb) over TR 117 NS RR built?

It was built in 1976, making it 49 years old in 2025.

What condition is I-72 (wb) over TR 117 NS RR 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 August 2024.

How much traffic does I-72 (wb) over TR 117 NS RR carry?

About 7,000 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I-72 (wb) over TR 117 NS RR?

The structure is 211 ft (64.3 m) long with a longest span of 88 ft (26.8 m) and a deck 50 ft wide.

Who owns I-72 (wb) over TR 117 NS RR?

It is owned by the State Highway Agency.