US Bridges

Union Road / CHT-6 over S Br Kishwaukee Riv

Good

McHenry County, Illinois · 0.5 MI S Il RTE 176 · Structure no. 056317800000000

Built
2011
14 years old
Condition
Good
inspected October 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
150 ft
2 main spans
Daily traffic
1,800
2021 count
Owner
County
County Highway Agency

About this bridge

Union Road / CHT-6 over S Br Kishwaukee Riv is a prestressed concrete continuous stringer/multi-beam or girder carrying Union Road / CHT-6 over S Br Kishwaukee Riv in McHenry County, Illinois. It was built in 2011, so it is 14 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 1,800 vehicles a day, roughly 8% of them trucks, projected to reach 2,160 by 2046. The structure is 150 ft (45.6 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesUnion Road / CHT-6
CrossesS Br Kishwaukee Riv
Location0.5 MI S Il RTE 176
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.24926, -88.54034
Functional classRural Major Collector

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 protection9 ExcellentNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length150 ft (45.6 m)
Longest span73 ft (22.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2021)
Projected traffic2,160 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Road / CHT-6 over S Br Kishwaukee Riv built?

It was built in 2011, making it 14 years old in 2025.

What condition is Union Road / CHT-6 over S Br Kishwaukee Riv 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 October 2021.

How much traffic does Union Road / CHT-6 over S Br Kishwaukee Riv carry?

About 1,800 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Union Road / CHT-6 over S Br Kishwaukee Riv?

The structure is 150 ft (45.6 m) long with a longest span of 73 ft (22.4 m) and a deck 43 ft wide.

Who owns Union Road / CHT-6 over S Br Kishwaukee Riv?

It is owned by the County Highway Agency.