US Bridges

Shabbona Grove Roa over Little Rock Creek

Fair

DeKalb County, Illinois · 700N 1720E · Structure no. 019542600000000

Built
1981
44 years old
Condition
Fair
inspected March 2023
Type
Channel Beam
Concrete
Length
101 ft
3 main spans
Daily traffic
75
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Shabbona Grove Roa over Little Rock Creek is a concrete channel beam carrying Shabbona Grove Roa over Little Rock Creek in DeKalb County, Illinois. It was built in 1981, so it is 44 years old, younger 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 75 vehicles a day, projected to reach 84 by 2046. The structure is 101 ft (30.8 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesShabbona Grove Roa
CrossesLittle Rock Creek
Location700N 1720E
RouteCounty Highway 0
CountyDeKalb County
StateIllinois
Coordinates41.734, -88.60746
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.
Substructure7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span33 ft (10.1 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2021)
Projected traffic84 by 2046
Trucks0%
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

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 Roa over Little Rock Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Shabbona Grove Roa over Little 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 March 2023.

How much traffic does Shabbona Grove Roa over Little Rock Creek carry?

About 75 vehicles per day (2021 count).

How long is Shabbona Grove Roa over Little Rock Creek?

The structure is 101 ft (30.8 m) long with a longest span of 33 ft (10.1 m) and a deck 30 ft wide.

Who owns Shabbona Grove Roa over Little Rock Creek?

It is owned by the Town or Township Highway Agency.