US Bridges

7th Street over Keith Creek

Good

Winnebago County, Illinois · 0.6 MI S of State · Structure no. 101605800000000

Built
1986
39 years old
Condition
Good
inspected August 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
3,550
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

7th Street over Keith Creek is a steel stringer/multi-beam or girder carrying 7th Street over Keith Creek in Winnebago County, Illinois. It was built in 1986, so it is 39 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 3,550 vehicles a day, roughly 6% of them trucks, projected to reach 4,192 by 2046. The structure is 43 ft (13.1 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries7th Street
CrossesKeith Creek
Location0.6 MI S of State
Coordinates42.25883, -89.08087
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span41 ft (12.5 m)
Deck width60 ft (18.3 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,550 (2022)
Projected traffic4,192 by 2046
Trucks6%
Lanes on structure4
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 7th Street over Keith Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is 7th Street over Keith 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 August 2021.

How much traffic does 7th Street over Keith Creek carry?

About 3,550 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is 7th Street over Keith Creek?

The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.5 m) and a deck 60 ft wide.

Who owns 7th Street over Keith Creek?

It is owned by the City or Municipal Highway Agency.