Structure 32410 · St. Charles County, MO

Augusta Bottom RD over Bigelow CR

Carries Augusta Bottom RD over Bigelow CR, S 15 T 44 N R 1 E.

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 39 ft across with 3 openings. Lengths and the car 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, so those are drawn as typical for a culvert.

Built200818 years old
Length39.0 ft11.9 m
Daily traffic261counted 2024
Last inspectedFebruary 2024every 24 months

Location

StateMissouri
CountySt. Charles
LocationS 15 T 44 N R 1 E
CarriesAugusta Bottom RD
CrossesBigelow CR
Coordinates38.56681, -90.90445

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length39.0 ft (11.9 m)
Max Span14.1 ft (4.3 m)
Deck Width32.2 ft (9.8 m)
Deck Area116.6 sq m
Main Spans3
Year Built2008

Traffic

Avg Daily Traffic261 (2024)
Truck Traffic25%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number32410

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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