US Bridges

Shabbona Grove RD over Big Indian Creek

Fair

DeKalb County, Illinois · 700N 495E · Structure no. 019520400000000

Built
1956
69 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
58 ft
2 main spans
Daily traffic
375
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Shabbona Grove RD over Big Indian Creek is a concrete continuous slab carrying Shabbona Grove RD over Big Indian Creek in DeKalb County, Illinois. It was built in 1956, so it is 69 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 375 vehicles a day, roughly 41% of them trucks, projected to reach 420 by 2046. The structure is 58 ft (17.7 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesShabbona Grove RD
CrossesBig Indian Creek
Location700N 495E
RouteCounty Highway 0
CountyDeKalb County
StateIllinois
Coordinates41.73223, -88.84853
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length58 ft (17.7 m)
Longest span27 ft (8.2 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2021)
Projected traffic420 by 2046
Trucks41%
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 Shabbona Grove RD over Big Indian Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Shabbona Grove RD over Big Indian 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 March 2023.

How much traffic does Shabbona Grove RD over Big Indian Creek carry?

About 375 vehicles per day (2021 count), of which roughly 41% are trucks.

How long is Shabbona Grove RD over Big Indian Creek?

The structure is 58 ft (17.7 m) long with a longest span of 27 ft (8.2 m) and a deck 29 ft wide.

Who owns Shabbona Grove RD over Big Indian Creek?

It is owned by the Town or Township Highway Agency.