US Bridges

Il 72 over Black Walnut Creek

Fair

Ogle County, Illinois · 2 Mi. E. of Byron · Structure no. 071008400000000

Built
1994
31 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
3,350
2023 count
Owner
State
State Highway Agency

About this bridge

Il 72 over Black Walnut Creek is a prestressed concrete stringer/multi-beam or girder carrying Il 72 over Black Walnut Creek in Ogle County, Illinois. It was built in 1994, so it is 31 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 3,350 vehicles a day, roughly 7% of them trucks, projected to reach 3,484 by 2046. The structure is 81 ft (24.7 m) long and 35 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesIl 72
CrossesBlack Walnut Creek
Location2 Mi. E. of Byron
RouteState Highway 72
CountyOgle County
StateIllinois
Coordinates42.11225, -89.21445
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.4 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length81 ft (24.7 m)
Longest span78 ft (23.9 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,350 (2023)
Projected traffic3,484 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Il 72 over Black Walnut Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Il 72 over Black Walnut 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 Il 72 over Black Walnut Creek carry?

About 3,350 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 72 over Black Walnut Creek?

The structure is 81 ft (24.7 m) long with a longest span of 78 ft (23.9 m) and a deck 35 ft wide.

Who owns Il 72 over Black Walnut Creek?

It is owned by the State Highway Agency.