US Bridges

Il RTE 173 over Creek

Good

Boone County, Illinois · .23MI E of Il 76 · Structure no. 004103000000000

Built
2015
10 years old
Condition
Good
inspected December 2022
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
4,850
2023 count
Owner
State
State Highway Agency

About this bridge

Il RTE 173 over Creek is a concrete culvert carrying Il RTE 173 over Creek in Boone County, Illinois. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,850 vehicles a day, roughly 9% of them trucks, projected to reach 5,050 by 2042. The structure is 22 ft (6.6 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIl RTE 173
CrossesCreek
Location.23MI E of Il 76
RouteState Highway 173
CountyBoone County
StateIllinois
Coordinates42.37124, -88.84696
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating80.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length22 ft (6.6 m)
Longest span21 ft (6.3 m)
Deck width24 ft (7.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,850 (2023)
Projected traffic5,050 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il RTE 173 over Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is Il RTE 173 over 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 December 2022.

How much traffic does Il RTE 173 over Creek carry?

About 4,850 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Il RTE 173 over Creek?

The structure is 22 ft (6.6 m) long with a longest span of 21 ft (6.3 m) and a deck 24 ft wide.

Who owns Il RTE 173 over Creek?

It is owned by the State Highway Agency.