US Bridges

Il 161 - FAP 805 over Trib Centralia Resvr

Good

Marion County, Illinois · 2 MI E Centralia · Structure no. 061201900000000

Built
1974
51 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
5,150
2023 count
Owner
State
State Highway Agency

About this bridge

Il 161 - FAP 805 over Trib Centralia Resvr is a concrete continuous culvert carrying Il 161 - FAP 805 over Trib Centralia Resvr in Marion County, Illinois. It was built in 1974, so it is 51 years old, older 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 5,150 vehicles a day, roughly 6% of them trucks, projected to reach 5,959 by 2046. The structure is 33 ft (10 m) long. If it were closed, the detour would be 21.7 mi (35 km).

CarriesIl 161 - FAP 805
CrossesTrib Centralia Resvr
Location2 MI E Centralia
RouteState Highway 161
Coordinates38.52517, -89.07341
Functional classUrban Other Principal Arterial

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating75.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length33 ft (10 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,150 (2023)
Projected traffic5,959 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Il 161 - FAP 805 over Trib Centralia Resvr built?

It was built in 1974, making it 51 years old in 2025.

What condition is Il 161 - FAP 805 over Trib Centralia Resvr 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 April 2023.

How much traffic does Il 161 - FAP 805 over Trib Centralia Resvr carry?

About 5,150 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 161 - FAP 805 over Trib Centralia Resvr?

The structure is 33 ft (10 m) long with a longest span of 15 ft (4.6 m).

Who owns Il 161 - FAP 805 over Trib Centralia Resvr?

It is owned by the State Highway Agency.