Structure 90321700000000 · Tazewell County, IL

Fas 1481-townline over Little Mackinaw Rv

Carries Fas 1481-townline over Little Mackinaw Rv, N.ctr-3-t23nr2w.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT128 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

128 ft end to end, longest span 48 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 slab bridge.

Built199531 years old
Length128.0 ft39 m
Daily traffic1,100counted 2023
Last inspectedJanuary 2024every 24 months

Location

StateIllinois
CountyTazewell
LocationN.ctr-3-t23nr2w
CarriesFas 1481-townline
CrossesLittle Mackinaw Rv
Coordinates40.48477, -89.31531

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length128.0 ft (39 m)
Max Span47.6 ft (14.5 m)
Deck Width27.9 ft (8.5 m)
Deck Area331.5 sq m
Main Spans3
Year Built1995

Traffic

Avg Daily Traffic1,100 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number090321700000000

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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