US Bridges

Il 101 over Williams Creek

Fair

Schuyler County, Illinois · 2.5M E IL61-AUGUSTA · Structure no. 085002500000000

Built
1929
96 years old, rebuilt 1989
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
148 ft
3 main spans
Daily traffic
675
2023 count
Owner
State
State Highway Agency

About this bridge

Il 101 over Williams Creek is a steel continuous stringer/multi-beam or girder carrying Il 101 over Williams Creek in Schuyler County, Illinois. It was built in 1929 and reconstructed in 1989, so it is 96 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 675 vehicles a day, roughly 16% of them trucks, projected to reach 732 by 2046. The structure is 148 ft (45 m) long and 35 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesIl 101
CrossesWilliams Creek
Location2.5M E IL61-AUGUSTA
RouteState Highway 101
CountySchuyler County
StateIllinois
Coordinates40.22804, -90.90351
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating52.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length148 ft (45 m)
Longest span58 ft (17.7 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic675 (2023)
Projected traffic732 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

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 101 over Williams Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1989.

What condition is Il 101 over Williams 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 December 2023.

How much traffic does Il 101 over Williams Creek carry?

About 675 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Il 101 over Williams Creek?

The structure is 148 ft (45 m) long with a longest span of 58 ft (17.7 m) and a deck 35 ft wide.

Who owns Il 101 over Williams Creek?

It is owned by the State Highway Agency.