Structure 33966 · Henry County, MO

RT N E over Norris Br

Carries RT N E over Norris Br, S 4 T 43 N R 27 W.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure9/9 · Excellent
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT90 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 9/9

90 ft end to end. 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 box-beam bridge.

Built201214 years old
Length89.9 ft27.4 m
Daily traffic166counted 2024
Last inspectedSeptember 2024every 24 months

Location

StateMissouri
CountyHenry
LocationS 4 T 43 N R 27 W
CarriesRT N E
CrossesNorris Br
Coordinates38.54668, -93.90153

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length89.9 ft (27.4 m)
Max Span89.9 ft (27.4 m)
Deck Width25.9 ft (7.9 m)
Deck Area216.5 sq m
Main Spans1
Year Built2012

Traffic

Avg Daily Traffic166 (2024)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number33966

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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