US Bridges

TR 185 over Drainage Ditch

Good

Douglas County, Illinois · 2.5 MI SW Chestervil · Structure no. 021453900000000

Built
1990
35 years old
Condition
Good
inspected February 2022
Type
Channel Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
100
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 185 over Drainage Ditch is a concrete channel beam carrying TR 185 over Drainage Ditch in Douglas County, Illinois. It was built in 1990, so it is 35 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 17% of them trucks, projected to reach 101 by 2046. The structure is 86 ft (26.2 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTR 185
CrossesDrainage Ditch
Location2.5 MI SW Chestervil
RouteCounty Highway 0
Coordinates39.66637, -88.40398
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span36 ft (11 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic101 by 2046
Trucks17%
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 185 over Drainage Ditch built?

It was built in 1990, making it 35 years old in 2025.

What condition is TR 185 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 February 2022.

How much traffic does TR 185 over Drainage Ditch carry?

About 100 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is TR 185 over Drainage Ditch?

The structure is 86 ft (26.2 m) long with a longest span of 36 ft (11 m) and a deck 26 ft wide.

Who owns TR 185 over Drainage Ditch?

It is owned by the Town or Township Highway Agency.