US Bridges

Ch 6 over Kaskaskia River

Good

Douglas County, Illinois · 4.65 MI N of Garrett · Structure no. 021404000000000

Built
2021
4 years old, rebuilt 2022
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
146 ft
3 main spans
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

Ch 6 over Kaskaskia River is a concrete stringer/multi-beam or girder carrying Ch 6 over Kaskaskia River in Douglas County, Illinois. It was built in 2021 and reconstructed in 2022, so it is 4 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 25 vehicles a day, roughly 8% of them trucks, projected to reach 200 by 2046. The structure is 146 ft (44.6 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCh 6
CrossesKaskaskia River
Location4.65 MI N of Garrett
RouteCounty Highway 0
CountyDouglas County
StateIllinois
Coordinates39.86472, -88.36483
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length146 ft (44.6 m)
Longest span65 ft (19.8 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic200 by 2046
Trucks8%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 6 over Kaskaskia River built?

It was built in 2021, making it 4 years old in 2025. It was reconstructed in 2022.

What condition is Ch 6 over Kaskaskia River 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 October 2024.

How much traffic does Ch 6 over Kaskaskia River carry?

About 25 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Ch 6 over Kaskaskia River?

The structure is 146 ft (44.6 m) long with a longest span of 65 ft (19.8 m) and a deck 30 ft wide.

Who owns Ch 6 over Kaskaskia River?

It is owned by the County Highway Agency.