US Bridges

Il 17/91 over Spoon River

Poor

Stark County, Illinois · .6 MI W of Wyoming · Structure no. 088000200000000

Built
1924
101 years old, rebuilt 1984
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
260 ft
1 main span
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

Il 17/91 over Spoon River is a steel stringer/multi-beam or girder carrying Il 17/91 over Spoon River in Stark County, Illinois. It was built in 1924 and reconstructed in 1984, so it is 101 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,600 vehicles a day, roughly 4% of them trucks, projected to reach 1,768 by 2046. The structure is 260 ft (79.2 m) long and 33 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

CarriesIl 17/91
CrossesSpoon River
Location.6 MI W of Wyoming
RouteState Highway 17
Coordinates41.06332, -89.79597
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating17.9 US tons
Inventory rating10.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span128 ft (39 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,768 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$938,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 17/91 over Spoon River built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1984.

What condition is Il 17/91 over Spoon River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Il 17/91 over Spoon River carry?

About 1,600 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Il 17/91 over Spoon River?

The structure is 260 ft (79.2 m) long with a longest span of 128 ft (39 m) and a deck 33 ft wide.

Who owns Il 17/91 over Spoon River?

It is owned by the State Highway Agency.