US Bridges

US20B West Bound L over US20 Freeport Bypass

Fair

Stephenson County, Illinois · .3 MI E Springfld RD · Structure no. 089006100000000

Built
1987
38 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
329 ft
2 main spans
Daily traffic
6,900
2023 count
Owner
State
State Highway Agency

About this bridge

US20B West Bound L over US20 Freeport Bypass is a steel continuous stringer/multi-beam or girder carrying US20B West Bound L over US20 Freeport Bypass in Stephenson County, Illinois. It was built in 1987, so it is 38 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 6,900 vehicles a day, roughly 9% of them trucks, projected to reach 3,611 by 2046. The structure is 329 ft (100.4 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS20B West Bound L
CrossesUS20 Freeport Bypass
Location.3 MI E Springfld RD
RouteU.S. Route 20
CountyStephenson County
StateIllinois
Coordinates42.27602, -89.53865
Functional classRural Principal Arterial - Other

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.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.5 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length329 ft (100.4 m)
Longest span130 ft (39.6 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,900 (2023)
Projected traffic3,611 by 2046
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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 US20B West Bound L over US20 Freeport Bypass built?

It was built in 1987, making it 38 years old in 2025.

What condition is US20B West Bound L over US20 Freeport Bypass 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 US20B West Bound L over US20 Freeport Bypass carry?

About 6,900 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US20B West Bound L over US20 Freeport Bypass?

The structure is 329 ft (100.4 m) long with a longest span of 130 ft (39.6 m) and a deck 29 ft wide.

Who owns US20B West Bound L over US20 Freeport Bypass?

It is owned by the State Highway Agency.