US Bridges

Obrien Road over Nippersink Creek

Good

McHenry County, Illinois · 1.5 MI W of Il 47 · Structure no. 056311800000000

Built
1976
49 years old, rebuilt 2019
Condition
Good
inspected August 2023
Type
Slab
Concrete Continuous
Length
106 ft
3 main spans
Daily traffic
850
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Obrien Road over Nippersink Creek is a concrete continuous slab carrying Obrien Road over Nippersink Creek in McHenry County, Illinois. It was built in 1976 and reconstructed in 2019, so it is 49 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 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 850 vehicles a day, roughly 7% of them trucks, projected to reach 1,020 by 2046. The structure is 106 ft (32.3 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesObrien Road
CrossesNippersink Creek
Location1.5 MI W of Il 47
RouteCounty Highway 0
CountyMcHenry County
StateIllinois
Coordinates42.44319, -88.46314
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating35.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length106 ft (32.3 m)
Longest span36 ft (11 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2021)
Projected traffic1,020 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Obrien Road over Nippersink Creek built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2019.

What condition is Obrien Road over Nippersink Creek 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 2023.

How much traffic does Obrien Road over Nippersink Creek carry?

About 850 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Obrien Road over Nippersink Creek?

The structure is 106 ft (32.3 m) long with a longest span of 36 ft (11 m) and a deck 31 ft wide.

Who owns Obrien Road over Nippersink Creek?

It is owned by the Town or Township Highway Agency.