US Bridges

TR 73 over W Okaw River

Fair

Moultrie County, Illinois · 2.3 MI N of Dunn · Structure no. 070472100000000

Built
1970
55 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
151 ft
3 main spans
Daily traffic
150
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 73 over W Okaw River is a prestressed concrete box beam or girders - multiple carrying TR 73 over W Okaw River in Moultrie County, Illinois. It was built in 1970, so it is 55 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 3% of them trucks, projected to reach 158 by 2046. The structure is 151 ft (46 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 73
CrossesW Okaw River
Location2.3 MI N of Dunn
RouteCounty Highway 0
Coordinates39.65891, -88.68396
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45 US tons
Inventory rating12.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 15
Structure length151 ft (46 m)
Longest span49 ft (14.9 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2020)
Projected traffic158 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 73 over W Okaw River built?

It was built in 1970, making it 55 years old in 2025.

What condition is TR 73 over W Okaw River 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 December 2024.

How much traffic does TR 73 over W Okaw River carry?

About 150 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is TR 73 over W Okaw River?

The structure is 151 ft (46 m) long with a longest span of 49 ft (14.9 m) and a deck 22 ft wide.

Who owns TR 73 over W Okaw River?

It is owned by the Town or Township Highway Agency.