US Bridges

FAS 395-CH 17 over Spoon River

Poor

Knox County, Illinois · 5 MI SE of Gilson · Structure no. 048336200000000

Built
2000
25 years old
Condition
Poor
inspected October 2024
Type
Truss - Thru
Wood or Timber
Length
247 ft
1 main span
Daily traffic
125
2022 count
Owner
State
State Highway Agency

About this bridge

FAS 395-CH 17 over Spoon River is a wood or timber truss - thru carrying FAS 395-CH 17 over Spoon River in Knox County, Illinois. It was built in 2000, so it is 25 years old, younger 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 4 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 125 vehicles a day, roughly 26% of them trucks, projected to reach 202 by 2046. The structure is 247 ft (75.3 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAS 395-CH 17
CrossesSpoon River
Location5 MI SE of Gilson
RouteCounty Highway 0
CountyKnox County
StateIllinois
Coordinates40.85655, -90.11014
Functional classRural Major Collector

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating63.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1 (+2 approach)
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span103 ft (31.3 m)
Deck width20 ft (6.2 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2022)
Projected traffic202 by 2046
Trucks26%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 FAS 395-CH 17 over Spoon River built?

It was built in 2000, making it 25 years old in 2025.

What condition is FAS 395-CH 17 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 October 2024.

How much traffic does FAS 395-CH 17 over Spoon River carry?

About 125 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is FAS 395-CH 17 over Spoon River?

The structure is 247 ft (75.3 m) long with a longest span of 103 ft (31.3 m) and a deck 20 ft wide.

Who owns FAS 395-CH 17 over Spoon River?

It is owned by the State Highway Agency.