US Bridges

6th ST over Keith Creek

Fair

Winnebago County, Illinois · 0.5 MI S of E State · Structure no. 101607100000000

Built
1984
41 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
41 ft
1 main span
Daily traffic
3,900
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

6th ST over Keith Creek is a concrete slab carrying 6th ST over Keith Creek in Winnebago County, Illinois. It was built in 1984, so it is 41 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 3,900 vehicles a day, roughly 4% of them trucks, projected to reach 4,293 by 2046. The structure is 41 ft (12.5 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries6th ST
CrossesKeith Creek
Location0.5 MI S of E State
CountyWinnebago County
StateIllinois
Coordinates42.25935, -89.08234
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span39 ft (11.9 m)
Deck width38 ft (11.6 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2022)
Projected traffic4,293 by 2046
Trucks4%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 6th ST over Keith Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is 6th ST over Keith Creek 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 6th ST over Keith Creek carry?

About 3,900 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is 6th ST over Keith Creek?

The structure is 41 ft (12.5 m) long with a longest span of 39 ft (11.9 m) and a deck 38 ft wide.

Who owns 6th ST over Keith Creek?

It is owned by the City or Municipal Highway Agency.