US Bridges

Ch 11(FAS 1629) over Kaskaskia River

Fair

Shelby County, Illinois · 1.0 MI E Cowden · Structure no. 087301900000000

Built
1968
57 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
268 ft
4 main spans
Daily traffic
450
2024 count
Owner
County
County Highway Agency

About this bridge

Ch 11(FAS 1629) over Kaskaskia River is a prestressed concrete box beam or girders - multiple carrying Ch 11(FAS 1629) over Kaskaskia River in Shelby County, Illinois. It was built in 1968, so it is 57 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 6 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 450 vehicles a day, roughly 5% of them trucks, projected to reach 556 by 2046. The structure is 268 ft (81.8 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCh 11(FAS 1629)
CrossesKaskaskia River
Location1.0 MI E Cowden
RouteCounty Highway 0
Coordinates39.24751, -88.83623
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating83.9 US tons
Inventory rating50.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 15
Structure length268 ft (81.8 m)
Longest span67 ft (20.4 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2024)
Projected traffic556 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 11(FAS 1629) over Kaskaskia River built?

It was built in 1968, making it 57 years old in 2025.

What condition is Ch 11(FAS 1629) over Kaskaskia River 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 March 2023.

How much traffic does Ch 11(FAS 1629) over Kaskaskia River carry?

About 450 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Ch 11(FAS 1629) over Kaskaskia River?

The structure is 268 ft (81.8 m) long with a longest span of 67 ft (20.4 m) and a deck 26 ft wide.

Who owns Ch 11(FAS 1629) over Kaskaskia River?

It is owned by the County Highway Agency.