US Bridges

Main Street over Big Rock Creek

Fair

Kane County, Illinois · 0.5M. E. Count Line · Structure no. 045300400000000

Built
1966
59 years old, rebuilt 2006
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
550
2023 count
Owner
County
County Highway Agency

About this bridge

Main Street over Big Rock Creek is a prestressed concrete box beam or girders - multiple carrying Main Street over Big Rock Creek in Kane County, Illinois. It was built in 1966 and reconstructed in 2006, so it is 59 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 550 vehicles a day, roughly 22% of them trucks, projected to reach 1,220 by 2046. The structure is 46 ft (14 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMain Street
CrossesBig Rock Creek
Location0.5M. E. Count Line
RouteCounty Highway 0
Coordinates41.82138, -88.58534
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span45 ft (13.7 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic1,220 by 2046
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Main Street over Big Rock Creek built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2006.

What condition is Main Street over Big Rock Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Main Street over Big Rock Creek carry?

About 550 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is Main Street over Big Rock Creek?

The structure is 46 ft (14 m) long with a longest span of 45 ft (13.7 m) and a deck 30 ft wide.

Who owns Main Street over Big Rock Creek?

It is owned by the County Highway Agency.