US Bridges

Ill 73 over Trib Pecatonica R

Fair

Stephenson County, Illinois · 1.5 MI S Winslow · Structure no. 089003200000000

Built
1931
94 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete
Length
48 ft
1 main span
Daily traffic
1,250
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 73 over Trib Pecatonica R is a concrete tee beam carrying Ill 73 over Trib Pecatonica R in Stephenson County, Illinois. It was built in 1931, so it is 94 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 1,250 vehicles a day, roughly 13% of them trucks, projected to reach 1,465 by 2046. The structure is 48 ft (14.6 m) long and 51 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesIll 73
CrossesTrib Pecatonica R
Location1.5 MI S Winslow
RouteState Highway 73
CountyStephenson County
StateIllinois
Coordinates42.46271, -89.78955
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
Deck7 GoodSome minor problems.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating26.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span47 ft (14.2 m)
Deck width51 ft (15.5 m)
Roadway width36 ft (11 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 closed21.7 mi (35 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 Trib Pecatonica R built?

It was built in 1931, making it 94 years old in 2025.

What condition is Ill 73 over Trib Pecatonica R 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 October 2023.

How much traffic does Ill 73 over Trib Pecatonica R carry?

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

How long is Ill 73 over Trib Pecatonica R?

The structure is 48 ft (14.6 m) long with a longest span of 47 ft (14.2 m) and a deck 51 ft wide.

Who owns Ill 73 over Trib Pecatonica R?

It is owned by the State Highway Agency.