Structure 526350460000027 · Johnson County, KS

Johnson Dr. over Mill Ck. & Bnsf Railroad

Carries Johnson Dr. over Mill Ck. & Bnsf Railroad, 1.50e Of K 7 HWY.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT629 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

629 ft end to end, longest span 85 ft: about 1.7 football fields. 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 multi-beam bridge.

Built199036 years old
Length628.9 ft191.7 m
Daily traffic7,300counted 2017
Last inspectedMarch 2024every 24 months

Location

StateKansas
CountyJohnson
Location1.50e Of K 7 HWY
CarriesJohnson Dr.
CrossesMill Ck. & Bnsf Railroad
Coordinates39.02943, -94.81820

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length628.9 ft (191.7 m)
Max Span85.0 ft (25.9 m)
Deck Width60.0 ft (18.3 m)
Deck Area3508.1 sq m
Main Spans9
Year Built1990

Traffic

Avg Daily Traffic7,300 (2017)
Truck Traffic6%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number526350460000027

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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