Structure 999907300070081 · Brown County, KS

Us73 K20 HWY over Mission Creek

Carries Us73 K20 HWY over Mission Creek, 0.42 Mi E Ejct Us159.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT133 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

133 ft end to end, longest span 52 ft. 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 slab bridge.

Built196660 years old
Length132.5 ft40.4 m
Daily traffic1,772counted 2023
Last inspectedJune 2023every 24 months

Location

StateKansas
CountyBrown
Location0.42 Mi E Ejct Us159
CarriesUs73 K20 HWY
CrossesMission Creek
Coordinates39.66722, -95.51778

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length132.5 ft (40.4 m)
Max Span51.8 ft (15.8 m)
Deck Width62.7 ft (19.1 m)
Deck Area771.6 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic1,772 (2023)
Truck Traffic11%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number999907300070081

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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