US Bridges

Nettle School Road over Obrien Run

Good

Grundy County, Illinois · .27 S.Of Stockd Rd. · Structure no. 032406500000000

Built
2016
9 years old
Condition
Good
inspected October 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
250
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Nettle School Road over Obrien Run is a prestressed concrete box beam or girders - multiple carrying Nettle School Road over Obrien Run in Grundy County, Illinois. It was built in 2016, so it is 9 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 250 vehicles a day, roughly 14% of them trucks, projected to reach 270 by 2046. The structure is 53 ft (16.3 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNettle School Road
CrossesObrien Run
Location.27 S.Of Stockd Rd.
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.35521, -88.51744
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length53 ft (16.3 m)
Longest span50 ft (15.1 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2024)
Projected traffic270 by 2046
Trucks14%
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 Nettle School Road over Obrien Run built?

It was built in 2016, making it 9 years old in 2025.

What condition is Nettle School Road over Obrien Run 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 Nettle School Road over Obrien Run carry?

About 250 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is Nettle School Road over Obrien Run?

The structure is 53 ft (16.3 m) long with a longest span of 50 ft (15.1 m) and a deck 30 ft wide.

Who owns Nettle School Road over Obrien Run?

It is owned by the Town or Township Highway Agency.