US Bridges

Ch 28 over Spoon Riv

Fair

Knox County, Illinois · NW-15-T11NR4E · Structure no. 048330200000000

Built
1987
38 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
212 ft
3 main spans
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

Ch 28 over Spoon Riv is a prestressed concrete box beam or girders - multiple carrying Ch 28 over Spoon Riv in Knox County, Illinois. It was built in 1987, so it is 38 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 75 vehicles a day, roughly 32% of them trucks, projected to reach 101 by 2046. The structure is 212 ft (64.6 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCh 28
CrossesSpoon Riv
LocationNW-15-T11NR4E
RouteCounty Highway 0
CountyKnox County
StateIllinois
Coordinates40.93995, -90.04265
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.
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 inspectionFebruary 2025
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length212 ft (64.6 m)
Longest span71 ft (21.6 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic101 by 2046
Trucks32%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 28 over Spoon Riv built?

It was built in 1987, making it 38 years old in 2025.

What condition is Ch 28 over Spoon Riv 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 February 2025.

How much traffic does Ch 28 over Spoon Riv carry?

About 75 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is Ch 28 over Spoon Riv?

The structure is 212 ft (64.6 m) long with a longest span of 71 ft (21.6 m) and a deck 27 ft wide.

Who owns Ch 28 over Spoon Riv?

It is owned by the County Highway Agency.