US Bridges

Grandridge RD Ch C over Johnny Run

Good

Grundy County, Illinois · 0.65 MI E Ill Rt 47 · Structure no. 032321100000000

Built
2019
6 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
88 ft
1 main span
Daily traffic
775
2024 count
Owner
County
County Highway Agency

About this bridge

Grandridge RD Ch C over Johnny Run is a prestressed concrete stringer/multi-beam or girder carrying Grandridge RD Ch C over Johnny Run in Grundy County, Illinois. It was built in 2019, so it is 6 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 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 775 vehicles a day, roughly 22% of them trucks, projected to reach 1,140 by 2046. The structure is 88 ft (26.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesGrandridge RD Ch C
CrossesJohnny Run
Location0.65 MI E Ill Rt 47
RouteCounty Highway 0
CountyGrundy County
StateIllinois
Coordinates41.24149, -88.40662
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length88 ft (26.7 m)
Longest span84 ft (25.5 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic775 (2024)
Projected traffic1,140 by 2046
Trucks22%
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

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 Grandridge RD Ch C over Johnny Run built?

It was built in 2019, making it 6 years old in 2025.

What condition is Grandridge RD Ch C over Johnny 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 July 2023.

How much traffic does Grandridge RD Ch C over Johnny Run carry?

About 775 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is Grandridge RD Ch C over Johnny Run?

The structure is 88 ft (26.7 m) long with a longest span of 84 ft (25.5 m) and a deck 30 ft wide.

Who owns Grandridge RD Ch C over Johnny Run?

It is owned by the County Highway Agency.