Structure 6130 · St. Francois County, MO

Mo 8 E over Big Rvr

Carries Mo 8 E over Big Rvr, S 6 T 36 N R 4 E.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT417 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

417 ft end to end, longest span 115 ft: about 6 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.

Built1960rebuilt 2009
Length417.0 ft127.1 m
Daily traffic6,462counted 2024
Last inspectedDecember 2024every 24 months

Location

StateMissouri
CountySt. Francois
LocationS 6 T 36 N R 4 E
CarriesMo 8 E
CrossesBig Rvr
Coordinates37.86782, -90.63937

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length417.0 ft (127.1 m)
Max Span114.8 ft (35 m)
Deck Width29.5 ft (9 m)
Deck Area1143.9 sq m
Main Spans3
Year Built1960 (reconstructed 2009)

Traffic

Avg Daily Traffic6,462 (2024)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number6130

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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