US Bridges

Il Route 78 over Mud Creek

Fair

Henry County, Illinois · 3 MI N of Kewanee · Structure no. 037012500000000

Built
1975
50 years old, rebuilt 2006
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
137 ft
3 main spans
Daily traffic
3,050
2023 count
Owner
State
State Highway Agency

About this bridge

Il Route 78 over Mud Creek is a prestressed concrete box beam or girders - multiple carrying Il Route 78 over Mud Creek in Henry County, Illinois. It was built in 1975 and reconstructed in 2006, so it is 50 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 3,050 vehicles a day, roughly 13% of them trucks, projected to reach 3,618 by 2046. The structure is 137 ft (41.8 m) long and 46 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesIl Route 78
CrossesMud Creek
Location3 MI N of Kewanee
RouteState Highway 78
CountyHenry County
StateIllinois
Coordinates41.29531, -89.9194
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106 US tons
Inventory rating63.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span45 ft (13.7 m)
Deck width46 ft (14 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,050 (2023)
Projected traffic3,618 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Route 78 over Mud Creek built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2006.

What condition is Il Route 78 over Mud 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 June 2023.

How much traffic does Il Route 78 over Mud Creek carry?

About 3,050 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Il Route 78 over Mud Creek?

The structure is 137 ft (41.8 m) long with a longest span of 45 ft (13.7 m) and a deck 46 ft wide.

Who owns Il Route 78 over Mud Creek?

It is owned by the State Highway Agency.