US Bridges

Chapel Hill RD over Fox River

Fair

McHenry County, Illinois · 0.3 MI NW of Bay RD · Structure no. 056313400000000

Built
1938
87 years old, rebuilt 1996
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
523 ft
8 main spans
Daily traffic
10,150
2021 count
Owner
County
County Highway Agency

About this bridge

Chapel Hill RD over Fox River is a steel continuous stringer/multi-beam or girder carrying Chapel Hill RD over Fox River in McHenry County, Illinois. It was built in 1938 and reconstructed in 1996, so it is 87 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 10,150 vehicles a day, roughly 6% of them trucks, projected to reach 12,180 by 2046. The structure is 523 ft (159.3 m) long and 40 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesChapel Hill RD
CrossesFox River
Location0.3 MI NW of Bay RD
CountyMcHenry County
StateIllinois
Coordinates42.37727, -88.23786
Functional classUrban Minor Arterial

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 inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length523 ft (159.3 m)
Longest span77 ft (23.6 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,150 (2021)
Projected traffic12,180 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Chapel Hill RD over Fox River built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1996.

What condition is Chapel Hill RD over Fox 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 October 2024.

How much traffic does Chapel Hill RD over Fox River carry?

About 10,150 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Chapel Hill RD over Fox River?

The structure is 523 ft (159.3 m) long with a longest span of 77 ft (23.6 m) and a deck 40 ft wide.

Who owns Chapel Hill RD over Fox River?

It is owned by the County Highway Agency.