US Bridges

Ill 78 over Swab Run

Fair

Peoria County, Illinois · 4 MI N of Elmwood · Structure no. 072202300000000

Built
1997
28 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
550
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 78 over Swab Run is a concrete culvert carrying Ill 78 over Swab Run in Peoria County, Illinois. It was built in 1997, so it is 28 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 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 550 vehicles a day, roughly 18% of them trucks, projected to reach 556 by 2046. The structure is 23 ft (7.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIll 78
CrossesSwab Run
Location4 MI N of Elmwood
RouteState Highway 78
CountyPeoria County
StateIllinois
Coordinates40.83171, -89.96595
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating54.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic556 by 2046
Trucks18%
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

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 Ill 78 over Swab Run built?

It was built in 1997, making it 28 years old in 2025.

What condition is Ill 78 over Swab Run 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 July 2023.

How much traffic does Ill 78 over Swab Run carry?

About 550 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Ill 78 over Swab Run?

The structure is 23 ft (7.1 m) long with a longest span of 10 ft (3 m).

Who owns Ill 78 over Swab Run?

It is owned by the State Highway Agency.