US Bridges

Hinckley RD over W Br Big Rock Creek

Fair

DeKalb County, Illinois · 1015N 1600E · Structure no. 019541500000000

Built
1963
62 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
76 ft
2 main spans
Daily traffic
1,100
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Hinckley RD over W Br Big Rock Creek is a concrete continuous slab carrying Hinckley RD over W Br Big Rock Creek in DeKalb County, Illinois. It was built in 1963, so it is 62 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 5 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 1,100 vehicles a day, roughly 5% of them trucks, projected to reach 1,232 by 2046. The structure is 76 ft (23.2 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHinckley RD
CrossesW Br Big Rock Creek
Location1015N 1600E
RouteCounty Highway 0
CountyDeKalb County
StateIllinois
Coordinates41.79042, -88.6411
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal 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 length76 ft (23.2 m)
Longest span36 ft (11 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2021)
Projected traffic1,232 by 2046
Trucks5%
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 Hinckley RD over W Br Big Rock Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Hinckley RD over W Br 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 April 2023.

How much traffic does Hinckley RD over W Br Big Rock Creek carry?

About 1,100 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Hinckley RD over W Br Big Rock Creek?

The structure is 76 ft (23.2 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.

Who owns Hinckley RD over W Br Big Rock Creek?

It is owned by the Town or Township Highway Agency.