Structure 8799 · Barry County, MO

Mo 39 S over Brantley Br

Carries Mo 39 S over Brantley Br, S 1 T 24 N R 25 W.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure5/9 · Fair
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT71 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 5/9Substructure 4/9

71 ft end to end, longest span 25 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built193393 years old
Length70.9 ft21.6 m
Daily traffic1,805counted 2024
Last inspectedSeptember 2024every 12 months

Location

StateMissouri
CountyBarry
LocationS 1 T 24 N R 25 W
CarriesMo 39 S
CrossesBrantley Br
Coordinates36.81359, -93.69074

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length70.9 ft (21.6 m)
Max Span25.3 ft (7.7 m)
Deck Width21.3 ft (6.5 m)
Deck Area140.4 sq m
Main Spans3
Year Built1933

Traffic

Avg Daily Traffic1,805 (2024)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number8799

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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