US Bridges

TR 30(STRAWN Rd) over Ditch

Fair

Macon County, Illinois · Il 121 · Structure no. 058309300000000

Built
1909
116 years old, rebuilt 1983
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
25
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 30(STRAWN Rd) over Ditch is a prestressed concrete box beam or girders - multiple carrying TR 30(STRAWN Rd) over Ditch in Macon County, Illinois. It was built in 1909 and reconstructed in 1983, so it is 116 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 25 vehicles a day, roughly 8% of them trucks, projected to reach 25 by 2046. The structure is 34 ft (10.4 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 30(STRAWN Rd)
CrossesDitch
LocationIl 121
RouteCounty Highway 0
CountyMacon County
StateIllinois
Coordinates39.97443, -89.1241
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2020)
Projected traffic25 by 2046
Trucks8%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$321,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 30(STRAWN Rd) over Ditch built?

It was built in 1909, making it 116 years old in 2025. It was reconstructed in 1983.

What condition is TR 30(STRAWN Rd) over Ditch 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 February 2024.

How much traffic does TR 30(STRAWN Rd) over Ditch carry?

About 25 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is TR 30(STRAWN Rd) over Ditch?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 24 ft wide.

Who owns TR 30(STRAWN Rd) over Ditch?

It is owned by the Town or Township Highway Agency.