Structure 60670100000000 · Madison County, IL

Schwarz Rd/fau 889 over Unknown Creek

Carries Schwarz Rd/fau 889 over Unknown Creek, .2 Mi S. Schwarz.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

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

Elevation

Side view, colored by inspection rating
23 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 23 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.

Built198640 years old
Length23.0 ft7 m
Daily traffic900counted 2021
Last inspectedJanuary 2022every 48 months

Location

StateIllinois
CountyMadison
Location.2 Mi S. Schwarz
CarriesSchwarz Rd/fau 889
CrossesUnknown Creek
Coordinates38.80704, -89.93966

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length23.0 ft (7 m)
Max Span11.2 ft (3.4 m)
Deck Area55.3 sq m
Main Spans2
Year Built1986

Traffic

Avg Daily Traffic900 (2021)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2022
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number060670100000000

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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