US Bridges

County Line Road over Kishwaukee River

Fair

McHenry County, Illinois · .4MI N of US 20 · Structure no. 056319400000000

Built
2016
9 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
111 ft
3 main spans
Daily traffic
475
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

County Line Road over Kishwaukee River is a prestressed concrete box beam or girders - multiple carrying County Line Road over Kishwaukee River in McHenry County, Illinois. It was built in 2016, so it is 9 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 475 vehicles a day, roughly 10% of them trucks, projected to reach 570 by 2046. The structure is 111 ft (33.9 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesCounty Line Road
CrossesKishwaukee River
Location.4MI N of US 20
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.25658, -88.70547
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating55 US tons
Inventory rating42.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 25 or greater
Structure length111 ft (33.9 m)
Longest span36 ft (11 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2017)
Projected traffic570 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 County Line Road over Kishwaukee River built?

It was built in 2016, making it 9 years old in 2025.

What condition is County Line Road over Kishwaukee River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does County Line Road over Kishwaukee River carry?

About 475 vehicles per day (2017 count), of which roughly 10% are trucks.

How long is County Line Road over Kishwaukee River?

The structure is 111 ft (33.9 m) long with a longest span of 36 ft (11 m) and a deck 32 ft wide.

Who owns County Line Road over Kishwaukee River?

It is owned by the Town or Township Highway Agency.