Structure 6868 · Macon County, MO

RT J E over Mussel Fk

Carries RT J E over Mussel Fk, S 6 T 59 N R 17 W.

Overall conditionPoor

Set by its lowest-rated component: Deck at 2 of 9.

How ratings work
Decksets the rating2/9 · Critical
Superstructure5/9 · Fair
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT174 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 2/9 · sets the ratingSuperstructure 5/9Substructure 5/9

174 ft end to end: 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 through truss.

Built195868 years old
Length173.9 ft53 m
Daily traffic127counted 2024
Last inspectedJuly 2024every 12 months

Location

StateMissouri
CountyMacon
LocationS 6 T 59 N R 17 W
CarriesRT J E
CrossesMussel Fk
Coordinates39.95925, -92.84909

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length173.9 ft (53 m)
Max Span80.1 ft (24.4 m)
Deck Width24.0 ft (7.3 m)
Deck Area386.9 sq m
Main Spans1
Year Built1958

Traffic

Avg Daily Traffic127 (2024)
Truck Traffic9%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number6868

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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