US Bridges

Boyton St-Fau 9631 over West End Creek

Fair

Williamson County, Illinois · Marion · Structure no. 100600900000000

Built
1997
28 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
41 ft
3 main spans
Daily traffic
5,000
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Boyton St-Fau 9631 over West End Creek is a concrete culvert carrying Boyton St-Fau 9631 over West End Creek in Williamson County, Illinois. It was built in 1997, so it is 28 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 5,000 vehicles a day, roughly 7% of them trucks, projected to reach 5,050 by 2046. The structure is 41 ft (12.6 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBoyton St-Fau 9631
CrossesWest End Creek
LocationMarion
CountyWilliamson County
StateIllinois
Coordinates37.72234, -88.92734
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length41 ft (12.6 m)
Longest span40 ft (12.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2021)
Projected traffic5,050 by 2046
Trucks7%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Boyton St-Fau 9631 over West End Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Boyton St-Fau 9631 over West End Creek 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 April 2023.

How much traffic does Boyton St-Fau 9631 over West End Creek carry?

About 5,000 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Boyton St-Fau 9631 over West End Creek?

The structure is 41 ft (12.6 m) long with a longest span of 40 ft (12.3 m) and a deck 40 ft wide.

Who owns Boyton St-Fau 9631 over West End Creek?

It is owned by the City or Municipal Highway Agency.