US Bridges

US 20 Br over Cn RR

Fair

Stephenson County, Illinois · 0.5 MI E Freeport · Structure no. 089000700000000

Built
1956
69 years old, rebuilt 2013
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
234 ft
3 main spans
Daily traffic
7,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 20 Br over Cn RR is a steel continuous stringer/multi-beam or girder carrying US 20 Br over Cn RR in Stephenson County, Illinois. It was built in 1956 and reconstructed in 2013, so it is 69 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 7,000 vehicles a day, roughly 7% of them trucks, projected to reach 7,373 by 2046. The structure is 234 ft (71.4 m) long and 68 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

CarriesUS 20 Br
CrossesCn RR
Location0.5 MI E Freeport
RouteU.S. Route 20
Coordinates42.28067, -89.58001
Functional classUrban 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.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating52.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length234 ft (71.4 m)
Longest span91 ft (27.6 m)
Deck width68 ft (20.7 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic7,373 by 2046
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed37.9 mi (61 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 Br over Cn RR built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 2013.

What condition is US 20 Br over Cn RR 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 2024.

How much traffic does US 20 Br over Cn RR carry?

About 7,000 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 20 Br over Cn RR?

The structure is 234 ft (71.4 m) long with a longest span of 91 ft (27.6 m) and a deck 68 ft wide.

Who owns US 20 Br over Cn RR?

It is owned by the State Highway Agency.