US Bridges

Harmony Riley Road over Interstate 90

Good

McHenry County, Illinois · I-90 1M W of Ill 23 · Structure no. 056992300000000

Built
2014
11 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
317 ft
2 main spans
Daily traffic
1,450
2021 count
Owner
County
County Highway Agency

About this bridge

Harmony Riley Road over Interstate 90 is a steel continuous stringer/multi-beam or girder carrying Harmony Riley Road over Interstate 90 in McHenry County, Illinois. It was built in 2014, so it is 11 years old, younger 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,450 vehicles a day, roughly 15% of them trucks, projected to reach 1,740 by 2046. The structure is 317 ft (96.5 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesHarmony Riley Road
CrossesInterstate 90
LocationI-90 1M W of Ill 23
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.18305, -88.6335
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length317 ft (96.5 m)
Longest span156 ft (47.5 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,450 (2021)
Projected traffic1,740 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Harmony Riley Road over Interstate 90 built?

It was built in 2014, making it 11 years old in 2025.

What condition is Harmony Riley Road over Interstate 90 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 August 2024.

How much traffic does Harmony Riley Road over Interstate 90 carry?

About 1,450 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is Harmony Riley Road over Interstate 90?

The structure is 317 ft (96.5 m) long with a longest span of 156 ft (47.5 m) and a deck 37 ft wide.

Who owns Harmony Riley Road over Interstate 90?

It is owned by the County Highway Agency.