US Bridges

Charles RD over Silver CR

Good

McHenry County, Illinois · 0.6 M NW of Ill 47 · Structure no. 056321100000000

Built
1978
47 years old
Condition
Good
inspected October 2022
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
6,500
2021 count
Owner
County
County Highway Agency

About this bridge

Charles RD over Silver CR is a concrete culvert carrying Charles RD over Silver CR in McHenry County, Illinois. It was built in 1978, so it is 47 years old, older 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 6,500 vehicles a day, roughly 8% of them trucks, projected to reach 7,800 by 2046. The structure is 22 ft (6.7 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCharles RD
CrossesSilver CR
Location0.6 M NW of Ill 47
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.36108, -88.45552
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
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating57.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width50 ft (15.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2021)
Projected traffic7,800 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Charles RD over Silver CR built?

It was built in 1978, making it 47 years old in 2025.

What condition is Charles RD over Silver CR 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 2022.

How much traffic does Charles RD over Silver CR carry?

About 6,500 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Charles RD over Silver CR?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 50 ft wide.

Who owns Charles RD over Silver CR?

It is owned by the County Highway Agency.