US Bridges

US 52 & Il 2 & Il over Rock River

Fair

Lee County, Illinois · Dixon · Structure no. 052007200000000

Built
2002
23 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
713 ft
4 main spans
Daily traffic
22,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 52 & Il 2 & Il over Rock River is a steel continuous stringer/multi-beam or girder carrying US 52 & Il 2 & Il over Rock River in Lee County, Illinois. It was built in 2002, so it is 23 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 22,100 vehicles a day, roughly 4% of them trucks, projected to reach 21,109 by 2046. The structure is 713 ft (217.3 m) long and 103 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 52 & Il 2 & Il
CrossesRock River
LocationDixon
RouteU.S. Route 52
CountyLee County
StateIllinois
Coordinates41.84657, -89.48396
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating87.9 US tons
Inventory rating52.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length713 ft (217.3 m)
Longest span203 ft (61.9 m)
Deck width103 ft (31.3 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,100 (2023)
Projected traffic21,109 by 2046
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US 52 & Il 2 & Il over Rock River built?

It was built in 2002, making it 23 years old in 2025.

What condition is US 52 & Il 2 & Il over Rock River 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 June 2024.

How much traffic does US 52 & Il 2 & Il over Rock River carry?

About 22,100 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 52 & Il 2 & Il over Rock River?

The structure is 713 ft (217.3 m) long with a longest span of 203 ft (61.9 m) and a deck 103 ft wide.

Who owns US 52 & Il 2 & Il over Rock River?

It is owned by the State Highway Agency.