US Bridges

Tower Road over US20 Freeport Bypass

Fair

Stephenson County, Illinois · NE of Freeport · Structure no. 089004700000000

Built
2004
21 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
221 ft
2 main spans
Daily traffic
150
2024 count
Owner
State
State Highway Agency

About this bridge

Tower Road over US20 Freeport Bypass is a prestressed concrete continuous stringer/multi-beam or girder carrying Tower Road over US20 Freeport Bypass in Stephenson County, Illinois. It was built in 2004, so it is 21 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 126 by 2046. The structure is 221 ft (67.5 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTower Road
CrossesUS20 Freeport Bypass
LocationNE of Freeport
RouteCounty Highway 0
Coordinates42.32099, -89.5927
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating90.4 US tons
Inventory rating54.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length221 ft (67.5 m)
Longest span118 ft (36.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic126 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 Tower Road over US20 Freeport Bypass built?

It was built in 2004, making it 21 years old in 2025.

What condition is Tower Road 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 December 2023.

How much traffic does Tower Road over US20 Freeport Bypass carry?

About 150 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Tower Road over US20 Freeport Bypass?

The structure is 221 ft (67.5 m) long with a longest span of 118 ft (36.1 m) and a deck 35 ft wide.

Who owns Tower Road over US20 Freeport Bypass?

It is owned by the State Highway Agency.