Structure 1302600000000 · Adams County, IL

Ch 48 over Mckee Creek

Carries Ch 48 over Mckee Creek, 4.6 Mi NE Liberty.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT192 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

192 ft end to end, longest span 69 ft: 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 multi-beam bridge.

Built1959rebuilt 2005
Length191.9 ft58.5 m
Daily traffic950counted 2024
Last inspectedDecember 2023every 48 months

Location

StateIllinois
CountyAdams
Location4.6 Mi NE Liberty
CarriesCh 48
CrossesMckee Creek
Coordinates39.93156, -91.03606

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length191.9 ft (58.5 m)
Max Span69.2 ft (21.1 m)
Deck Width31.5 ft (9.6 m)
Deck Area561.6 sq m
Main Spans3
Year Built1959 (reconstructed 2005)

Traffic

Avg Daily Traffic950 (2024)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number001302600000000

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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