Structure 48336200000000 · Knox County, IL

Fas 395-ch 17 over Spoon River

Carries Fas 395-ch 17 over Spoon River, 5 Mi SE Of Gilson.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT247 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 7/9

247 ft end to end: about 3 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a through truss.

Built200026 years old
Length247.0 ft75.3 m
Daily traffic125counted 2022
Last inspectedOctober 2024every 12 months

Location

StateIllinois
CountyKnox
Location5 Mi SE Of Gilson
CarriesFas 395-ch 17
CrossesSpoon River
Coordinates40.85655, -90.11014

Physical Characteristics

MaterialWood or Timber
DesignTruss - Thru
Total Length247.0 ft (75.3 m)
Max Span102.7 ft (31.3 m)
Deck Width20.3 ft (6.2 m)
Deck Area466.9 sq m
Main Spans1
Year Built2000

Traffic

Avg Daily Traffic125 (2022)
Truck Traffic26%
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number048336200000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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