US Bridges

North Union Road over Kishwaukee River

Good

McHenry County, Illinois · .8 MI N Il 176 · Structure no. 056321300000000

Built
2019
6 years old
Condition
Good
inspected August 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
500
2021 count
Owner
County
County Highway Agency

About this bridge

North Union Road over Kishwaukee River is a prestressed concrete stringer/multi-beam or girder carrying North Union Road over Kishwaukee River in McHenry County, Illinois. It was built in 2019, so it is 6 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 500 vehicles a day, roughly 13% of them trucks, projected to reach 600 by 2046. The structure is 93 ft (28.4 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNorth Union Road
CrossesKishwaukee River
Location.8 MI N Il 176
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.26738, -88.54031
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 alignment9: Superior to present desirable criteria
Operating rating61.4 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length93 ft (28.4 m)
Longest span89 ft (27.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2021)
Projected traffic600 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was North Union Road over Kishwaukee River built?

It was built in 2019, making it 6 years old in 2025.

What condition is North Union Road 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 August 2021.

How much traffic does North Union Road over Kishwaukee River carry?

About 500 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is North Union Road over Kishwaukee River?

The structure is 93 ft (28.4 m) long with a longest span of 89 ft (27.2 m) and a deck 31 ft wide.

Who owns North Union Road over Kishwaukee River?

It is owned by the County Highway Agency.