US Bridges

River Road over Kishwaukee R Overflo

Fair

McHenry County, Illinois · 0.8 MI W of Il 23 · Structure no. 056308000000000

Built
1928
97 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
2,250
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

River Road over Kishwaukee R Overflo is a concrete slab carrying River Road over Kishwaukee R Overflo in McHenry County, Illinois. It was built in 1928, so it is 97 years old, older 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 2,250 vehicles a day, roughly 5% of them trucks, projected to reach 2,700 by 2046. The structure is 28 ft (8.5 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRiver Road
CrossesKishwaukee R Overflo
Location0.8 MI W of Il 23
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.28296, -88.62386
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,250 (2021)
Projected traffic2,700 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$117,000
NavigationNo navigation control on waterway

Frequently asked questions

When was River Road over Kishwaukee R Overflo built?

It was built in 1928, making it 97 years old in 2025.

What condition is River Road over Kishwaukee R Overflo 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 October 2024.

How much traffic does River Road over Kishwaukee R Overflo carry?

About 2,250 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is River Road over Kishwaukee R Overflo?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 27 ft wide.

Who owns River Road over Kishwaukee R Overflo?

It is owned by the Town or Township Highway Agency.