US Bridges

US 14 over Kishwaukee River

Fair

McHenry County, Illinois · 4 M SE of Il 23 · Structure no. 056005100000000

Built
1984
41 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
117 ft
3 main spans
Daily traffic
7,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 14 over Kishwaukee River is a concrete continuous slab carrying US 14 over Kishwaukee River in McHenry County, Illinois. It was built in 1984, so it is 41 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 6 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 7,100 vehicles a day, roughly 7% of them trucks, projected to reach 9,240 by 2046. The structure is 117 ft (35.7 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesUS 14
CrossesKishwaukee River
Location4 M SE of Il 23
RouteU.S. Route 14
CountyMcHenry County
StateIllinois
Coordinates42.35681, -88.55537
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length117 ft (35.7 m)
Longest span44 ft (13.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,100 (2023)
Projected traffic9,240 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 US 14 over Kishwaukee River built?

It was built in 1984, making it 41 years old in 2025.

What condition is US 14 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 August 2023.

How much traffic does US 14 over Kishwaukee River carry?

About 7,100 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 14 over Kishwaukee River?

The structure is 117 ft (35.7 m) long with a longest span of 44 ft (13.4 m) and a deck 43 ft wide.

Who owns US 14 over Kishwaukee River?

It is owned by the State Highway Agency.