US Bridges

Riley RD over Stream

Fair

McHenry County, Illinois · 0.2 MI S Grange RD · Structure no. 056320800000000

Built
1930
95 years old, rebuilt 1962
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
25 ft
3 main spans
Daily traffic
275
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Riley RD over Stream is a steel culvert carrying Riley RD over Stream in McHenry County, Illinois. It was built in 1930 and reconstructed in 1962, so it is 95 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 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 275 vehicles a day, roughly 11% of them trucks, projected to reach 330 by 2046. The structure is 25 ft (7.6 m) long and 45 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesRiley RD
CrossesStream
Location0.2 MI S Grange RD
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.19538, -88.63265
Functional classRural 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.9 US tons
Inventory rating83.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span6 ft (1.8 m)
Deck width45 ft (13.7 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2021)
Projected traffic330 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Riley RD over Stream built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1962.

What condition is Riley RD over Stream 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 Riley RD over Stream carry?

About 275 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Riley RD over Stream?

The structure is 25 ft (7.6 m) long with a longest span of 6 ft (1.8 m) and a deck 45 ft wide.

Who owns Riley RD over Stream?

It is owned by the Town or Township Highway Agency.