Structure 36469 · Miller County, MO

Butterfield Stage over Blythe Creek

Carries Butterfield Stage over Blythe Creek, S 12 T 42 N R 15 W.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT155 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

155 ft end to end, longest span 38 ft: about 2 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 channel-beam bridge.

Built20206 years old
Length154.9 ft47.2 m
Daily traffic65counted 2023
Last inspectedJanuary 2025every 24 months

Location

StateMissouri
CountyMiller
LocationS 12 T 42 N R 15 W
CarriesButterfield Stage
CrossesBlythe Creek
Coordinates38.40994, -92.52607

Physical Characteristics

MaterialConcrete Continuous
DesignChannel Beam
Total Length154.9 ft (47.2 m)
Max Span38.4 ft (11.7 m)
Deck Width25.6 ft (7.8 m)
Deck Area368.2 sq m
Main Spans4
Year Built2020

Traffic

Avg Daily Traffic65 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number36469

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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