Structure 59321500000000 · Macoupin County, IL

Tr 474a over Shaws Pt Br

Carries Tr 474a over Shaws Pt Br, 5.5 E Carlinville.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9Substructure 5/9 · sets the rating

24 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1900126 years old
Length24.0 ft7.3 m
Daily traffic75counted 2021
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyMacoupin
Location5.5 E Carlinville
CarriesTr 474a
CrossesShaws Pt Br
Coordinates39.28324, -89.76931

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length24.0 ft (7.3 m)
Max Span23.0 ft (7 m)
Deck Width17.7 ft (5.4 m)
Deck Area39.4 sq m
Main Spans1
Year Built1900

Traffic

Avg Daily Traffic75 (2021)
Truck Traffic67%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number059321500000000

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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