US Bridges

Granart Road (ch 3 over Big Rock Creek

Good

Kane County, Illinois · 1.0 MI S Big Rock · Structure no. 045315100000000

Built
2005
20 years old
Condition
Good
inspected March 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
143 ft
3 main spans
Daily traffic
6,250
2023 count
Owner
County
County Highway Agency

About this bridge

Granart Road (ch 3 over Big Rock Creek is a prestressed concrete box beam or girders - multiple carrying Granart Road (ch 3 over Big Rock Creek in Kane County, Illinois. It was built in 2005, so it is 20 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 6,250 vehicles a day, roughly 6% of them trucks, projected to reach 7,137 by 2046. The structure is 143 ft (43.7 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGranart Road (ch 3
CrossesBig Rock Creek
Location1.0 MI S Big Rock
RouteCounty Highway 0
CountyKane County
StateIllinois
Coordinates41.74367, -88.54096
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating48.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length143 ft (43.7 m)
Longest span47 ft (14.2 m)
Deck width54 ft (16.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,250 (2023)
Projected traffic7,137 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Granart Road (ch 3 over Big Rock Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Granart Road (ch 3 over Big Rock 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 March 2022.

How much traffic does Granart Road (ch 3 over Big Rock Creek carry?

About 6,250 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Granart Road (ch 3 over Big Rock Creek?

The structure is 143 ft (43.7 m) long with a longest span of 47 ft (14.2 m) and a deck 54 ft wide.

Who owns Granart Road (ch 3 over Big Rock Creek?

It is owned by the County Highway Agency.