US Bridges

TR 108 over Drainage Ditch

Good

Douglas County, Illinois · 2.75 MI NE of Arcola · Structure no. 021464000000000

Built
1986
39 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
375
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 108 over Drainage Ditch is a concrete culvert carrying TR 108 over Drainage Ditch in Douglas County, Illinois. It was built in 1986, so it is 39 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 375 vehicles a day, roughly 3% of them trucks, projected to reach 303 by 2046. The structure is 22 ft (6.7 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTR 108
CrossesDrainage Ditch
Location2.75 MI NE of Arcola
RouteCounty Highway 0
Coordinates39.72012, -88.28355
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width35 ft (10.7 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2022)
Projected traffic303 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 108 over Drainage Ditch built?

It was built in 1986, making it 39 years old in 2025.

What condition is TR 108 over Drainage Ditch 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 December 2023.

How much traffic does TR 108 over Drainage Ditch carry?

About 375 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is TR 108 over Drainage Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 35 ft wide.

Who owns TR 108 over Drainage Ditch?

It is owned by the Town or Township Highway Agency.