Structure 35226 · Johnson County, MO

Mo 23 S over Blackwater Rvr

Carries Mo 23 S over Blackwater Rvr, S 33 T 48 N R 24 W.

Overall conditionGood

Set by its lowest-rated component: Deck at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure9/9 · Excellent
Substructure9/9 · Excellent
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT254 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 9/9Substructure 9/9

254 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 tee-beam bridge.

Built201511 years old
Length253.6 ft77.3 m
Daily traffic1,762counted 2024
Last inspectedDecember 2024every 24 months

Location

StateMissouri
CountyJohnson
LocationS 33 T 48 N R 24 W
CarriesMo 23 S
CrossesBlackwater Rvr
Coordinates38.90334, -93.56616

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length253.6 ft (77.3 m)
Max Span100.1 ft (30.5 m)
Deck Width30.5 ft (9.3 m)
Deck Area718.9 sq m
Main Spans3
Year Built2015

Traffic

Avg Daily Traffic1,762 (2024)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number35226

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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