US Bridges

FAU 5063 - State S over Rock River

Fair

Winnebago County, Illinois · Downtown Rockford · Structure no. 101002100000000

Built
1948
77 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
439 ft
4 main spans
Daily traffic
6,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 5063 - State S over Rock River is a steel continuous stringer/multi-beam or girder carrying FAU 5063 - State S over Rock River in Winnebago County, Illinois. It was built in 1948, so it is 77 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 5 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 6,000 vehicles a day, roughly 6% of them trucks, projected to reach 5,505 by 2046. The structure is 439 ft (133.8 m) long and 66 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFAU 5063 - State S
CrossesRock River
LocationDowntown Rockford
CountyWinnebago County
StateIllinois
Coordinates42.27052, -89.09271
Functional classUrban Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length439 ft (133.8 m)
Longest span122 ft (37.2 m)
Deck width66 ft (20.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2022)
Projected traffic5,505 by 2046
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.1 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was FAU 5063 - State S over Rock River built?

It was built in 1948, making it 77 years old in 2025.

What condition is FAU 5063 - State S 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 August 2023.

How much traffic does FAU 5063 - State S over Rock River carry?

About 6,000 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is FAU 5063 - State S over Rock River?

The structure is 439 ft (133.8 m) long with a longest span of 122 ft (37.2 m) and a deck 66 ft wide.

Who owns FAU 5063 - State S over Rock River?

It is owned by the City or Municipal Highway Agency.