US Bridges

Ill 73 over Stream

Fair

Carroll County, Illinois · 0.6 MI S Steph CO · Structure no. 008002600000000

Built
1932
93 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
42 ft
1 main span
Daily traffic
2,150
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 73 over Stream is a concrete tee beam carrying Ill 73 over Stream in Carroll County, Illinois. It was built in 1932, so it is 93 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 2,150 vehicles a day, roughly 16% of them trucks, projected to reach 2,273 by 2046. The structure is 42 ft (12.8 m) long and 44 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

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CarriesIll 73
CrossesStream
Location0.6 MI S Steph CO
RouteState Highway 73
CountyCarroll County
StateIllinois
Coordinates42.18943, -89.82472
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 rating98.2 US tons
Inventory rating39.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width44 ft (13.4 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,150 (2023)
Projected traffic2,273 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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 Stream built?

It was built in 1932, making it 93 years old in 2025.

What condition is Ill 73 over Stream 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 June 2023.

How much traffic does Ill 73 over Stream carry?

About 2,150 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 73 over Stream?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 44 ft wide.

Who owns Ill 73 over Stream?

It is owned by the State Highway Agency.