US Bridges

Ill 73 over Cedar Creek

Fair

Stephenson County, Illinois · S Edge of Winslow · Structure no. 089006600000000

Built
1990
35 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
1,250
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 73 over Cedar Creek is a steel stringer/multi-beam or girder carrying Ill 73 over Cedar Creek in Stephenson County, Illinois. It was built in 1990, so it is 35 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 1,250 vehicles a day, roughly 13% of them trucks, projected to reach 1,465 by 2046. The structure is 68 ft (20.7 m) long and 35 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesIll 73
CrossesCedar Creek
LocationS Edge of Winslow
RouteState Highway 73
Coordinates42.48983, -89.79065
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating53.9 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span66 ft (20 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2023)
Projected traffic1,465 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Ill 73 over Cedar Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Ill 73 over Cedar 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 August 2023.

How much traffic does Ill 73 over Cedar Creek carry?

About 1,250 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 73 over Cedar Creek?

The structure is 68 ft (20.7 m) long with a longest span of 66 ft (20 m) and a deck 35 ft wide.

Who owns Ill 73 over Cedar Creek?

It is owned by the State Highway Agency.