Structure 69052500000000 · Pike County, IL

Il 104 over Illinois River

Carries Il 104 over Illinois River, Meredosia.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,128 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

2,128 ft end to end: about 5.9 football fields. 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 arch.

Built20188 years old
Length2127.6 ft648.5 m
Daily traffic2,800counted 2023
Last inspectedJuly 2024every 24 months

Location

StateIllinois
CountyPike
LocationMeredosia
CarriesIl 104
CrossesIllinois River
Coordinates39.83144, -90.56985

Physical Characteristics

MaterialSteel Continuous
DesignArch - Thru
Total Length2127.6 ft (648.5 m)
Max Span589.9 ft (179.8 m)
Deck Width47.2 ft (14.4 m)
Deck Area9338.4 sq m
Main Spans1
Year Built2018

Traffic

Avg Daily Traffic2,800 (2023)
Truck Traffic26%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number069052500000000

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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