US Bridges

Il 176 over Kishwaukee River

Good

McHenry County, Illinois · 2 M E of Il 47 · Structure no. 056006900000000

Built
2000
25 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
1 main span
Daily traffic
10,200
2023 count
Owner
State
State Highway Agency

About this bridge

Il 176 over Kishwaukee River is a steel stringer/multi-beam or girder carrying Il 176 over Kishwaukee River in McHenry County, Illinois. It was built in 2000, so it is 25 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 10,200 vehicles a day, roughly 7% of them trucks, projected to reach 11,880 by 2046. The structure is 54 ft (16.5 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesIl 176
CrossesKishwaukee River
Location2 M E of Il 47
RouteState Highway 176
CountyMcHenry County
StateIllinois
Coordinates42.24992, -88.38443
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span52 ft (15.7 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,200 (2023)
Projected traffic11,880 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free 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 176 over Kishwaukee River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Il 176 over Kishwaukee River 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 March 2023.

How much traffic does Il 176 over Kishwaukee River carry?

About 10,200 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 176 over Kishwaukee River?

The structure is 54 ft (16.5 m) long with a longest span of 52 ft (15.7 m) and a deck 43 ft wide.

Who owns Il 176 over Kishwaukee River?

It is owned by the State Highway Agency.