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I-35 Hwy SB (kta) over Cottonwood R Ovfl Rd

Lyon County, Kansas · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

I-35 Hwy SB (kta) over Cottonwood R Ovfl Rd in Lyon County, Kansas, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1956 and reconstructed in 1984, making it 69 years old at the 2025 inventory.
It carries about 9,014 vehicles a day (traffic count year 2023).
It is one of 172 of the 494 inventoried bridges in Lyon County rated fair (34.8%); 4 (0.8%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 1,502 ft
Location	9.04 Mi NE Chase Co Line
NBI structure number	999903500560683
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Kansas department of transportation.

Bridge	Built	Vehicles/day	Condition
URB1105 Indust over I-35 Hwy	1994	12,935	Good
US50 Hwy over Cottonwood Riv Drain	1947	12,887	Fair
I-35HWY over Lincoln St	1965	10,914	Fair
I-35 Hwy over Lincoln St	2024	10,914	Good
I-35 Hwy SB (kta) over Local Road Phenis Creek	1956	9,014	Good
I-35 Hwy NB (kta) over Local Road Phenis Creek	1956	9,014	Good