Structure 1008400000000 · Adams County, IL

Fap 733 over Ill 336

Carries Fap 733 over Ill 336, 0.3 Mi E Mendon.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT229 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

229 ft end to end, longest span 92 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.

Built200125 years old
Length228.7 ft69.7 m
Daily traffic2,150counted 2023
Last inspectedOctober 2024every 48 months

Location

StateIllinois
CountyAdams
Location0.3 Mi E Mendon
CarriesFap 733
CrossesIll 336
Coordinates40.08803, -91.27106

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length228.7 ft (69.7 m)
Max Span91.9 ft (28 m)
Deck Width68.6 ft (20.9 m)
Deck Area1456.7 sq m
Main Spans2
Year Built2001

Traffic

Avg Daily Traffic2,150 (2023)
Truck Traffic11%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number001008400000000

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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