US Bridges

Old Post Road over Waubansee Creek

Good

Kendall County, Illinois · .3 W of Douglas Rd. · Structure no. 047630200000000

Built
1994
31 years old
Condition
Good
inspected April 2022
Type
Frame
Concrete
Length
38 ft
1 main span
Daily traffic
3,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Post Road over Waubansee Creek is a concrete frame carrying Old Post Road over Waubansee Creek in Kendall County, Illinois. It was built in 1994, so it is 31 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 3,000 vehicles a day, roughly 6% of them trucks, projected to reach 3,791 by 2046. The structure is 38 ft (11.7 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesOld Post Road
CrossesWaubansee Creek
Location.3 W of Douglas Rd.
RouteCity Street 0
Coordinates41.70377, -88.32261
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length38 ft (11.7 m)
Longest span37 ft (11.3 m)
Deck width54 ft (16.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2024)
Projected traffic3,791 by 2046
Trucks6%
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 Old Post Road over Waubansee Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Old Post Road over Waubansee 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 April 2022.

How much traffic does Old Post Road over Waubansee Creek carry?

About 3,000 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Old Post Road over Waubansee Creek?

The structure is 38 ft (11.7 m) long with a longest span of 37 ft (11.3 m) and a deck 54 ft wide.

Who owns Old Post Road over Waubansee Creek?

It is owned by the City or Municipal Highway Agency.