US Bridges

US 20 Br over Trib. of Beaver Cr.

Fair

Boone County, Illinois · .1 MI E. Winn. CO LN · Structure no. 004200300000000

Built
1989
36 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
13,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Br over Trib. of Beaver Cr. is a concrete culvert carrying US 20 Br over Trib. of Beaver Cr. in Boone County, Illinois. It was built in 1989, so it is 36 years old, younger 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 13,400 vehicles a day, roughly 4% of them trucks, projected to reach 13,520 by 2046. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 20 Br
CrossesTrib. of Beaver Cr.
Location.1 MI E. Winn. CO LN
RouteU.S. Route 20
CountyBoone County
StateIllinois
Coordinates42.27464, -88.93788
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length31 ft (9.4 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 traffic13,400 (2023)
Projected traffic13,520 by 2046
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 US 20 Br over Trib. of Beaver Cr. built?

It was built in 1989, making it 36 years old in 2025.

What condition is US 20 Br over Trib. of Beaver Cr. 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 February 2023.

How much traffic does US 20 Br over Trib. of Beaver Cr. carry?

About 13,400 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 20 Br over Trib. of Beaver Cr.?

The structure is 31 ft (9.4 m) long with a longest span of 15 ft (4.6 m).

Who owns US 20 Br over Trib. of Beaver Cr.?

It is owned by the State Highway Agency.