Structure 36007000000000 · Henderson County, IL

Ill 164 over Smith Creek

Carries Ill 164 over Smith Creek, 2.3 Mi E Of Oquawka.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT130 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 8/9

130 ft end to end, longest span 65 ft. 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 multi-beam bridge.

Built201115 years old
Length129.9 ft39.6 m
Daily traffic1,500counted 2023
Last inspectedNovember 2021every 48 months

Location

StateIllinois
CountyHenderson
Location2.3 Mi E Of Oquawka
CarriesIll 164
CrossesSmith Creek
Coordinates40.93168, -90.89487

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length129.9 ft (39.6 m)
Max Span65.0 ft (19.8 m)
Deck Width35.1 ft (10.7 m)
Deck Area423.7 sq m
Main Spans2
Year Built2011

Traffic

Avg Daily Traffic1,500 (2023)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number036007000000000

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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