US Bridges

US Bus. 20 over Preston Creek

Good

Stephenson County, Illinois · 1 Mi. W. Freeport · Structure no. 089007600000000

Built
1999
26 years old
Condition
Good
inspected October 2021
Type
Slab
Concrete Continuous
Length
76 ft
2 main spans
Daily traffic
2,900
2023 count
Owner
State
State Highway Agency

About this bridge

US Bus. 20 over Preston Creek is a concrete continuous slab carrying US Bus. 20 over Preston Creek in Stephenson County, Illinois. It was built in 1999, so it is 26 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,900 vehicles a day, roughly 3% of them trucks, projected to reach 2,727 by 2046. The structure is 76 ft (23.2 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS Bus. 20
CrossesPreston Creek
Location1 Mi. W. Freeport
RouteU.S. Route 20
CountyStephenson County
StateIllinois
Coordinates42.31489, -89.67567
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length76 ft (23.2 m)
Longest span37 ft (11.2 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2023)
Projected traffic2,727 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 US Bus. 20 over Preston Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is US Bus. 20 over Preston Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2021.

How much traffic does US Bus. 20 over Preston Creek carry?

About 2,900 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is US Bus. 20 over Preston Creek?

The structure is 76 ft (23.2 m) long with a longest span of 37 ft (11.2 m) and a deck 39 ft wide.

Who owns US Bus. 20 over Preston Creek?

It is owned by the State Highway Agency.