Structure 30209 · McDonald County, MO

Cedar RD over Indian Rvr

Carries Cedar RD over Indian Rvr, S 18 T 22 N R 32 W.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT312 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

312 ft end to end, longest span 100 ft: about 4 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 deck arch.

Built192997 years old
Length312.0 ft95.1 m
Daily traffic1,500counted 2024
Last inspectedFebruary 2024every 24 months

Location

StateMissouri
CountyMcDonald
LocationS 18 T 22 N R 32 W
CarriesCedar RD
CrossesIndian Rvr
Coordinates36.64120, -94.42929

Physical Characteristics

MaterialConcrete Continuous
DesignArch - Deck
Total Length312.0 ft (95.1 m)
Max Span100.1 ft (30.5 m)
Deck Width23.0 ft (7 m)
Deck Area665.7 sq m
Main Spans3
Year Built1929

Traffic

Avg Daily Traffic1,500 (2024)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number30209

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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