US Bridges

TR 66 over Drainage Ditch

Good

Douglas County, Illinois · 300 N 550 E · Structure no. 021455000000000

Built
2011
14 years old
Condition
Good
inspected February 2022
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
325
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 66 over Drainage Ditch is a concrete culvert carrying TR 66 over Drainage Ditch in Douglas County, Illinois. It was built in 2011, so it is 14 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 325 vehicles a day, roughly 33% of them trucks, projected to reach 354 by 2046. The structure is 29 ft (8.7 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesTR 66
CrossesDrainage Ditch
Location300 N 550 E
RouteCounty Highway 0
CountyDouglas County
StateIllinois
Coordinates39.69556, -88.36734
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.7 m)
Longest span12 ft (3.7 m)
Deck width43 ft (13 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2022)
Projected traffic354 by 2046
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 66 over Drainage Ditch built?

It was built in 2011, making it 14 years old in 2025.

What condition is TR 66 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 66 over Drainage Ditch carry?

About 325 vehicles per day (2022 count), of which roughly 33% are trucks.

How long is TR 66 over Drainage Ditch?

The structure is 29 ft (8.7 m) long with a longest span of 12 ft (3.7 m) and a deck 43 ft wide.

Who owns TR 66 over Drainage Ditch?

It is owned by the Town or Township Highway Agency.