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120th Ave over North Branch Slate Crk.

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

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

120th Ave over North Branch Slate Crk. in Sumner 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 1960, making it 65 years old at the 2025 inventory.
It carries about 10 vehicles a day (traffic count year 2012).
Its listed owner is the county highway agency.
It is one of 311 of the 658 inventoried bridges in Sumner County rated fair (47.3%); 16 (2.4%) 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 40 ft
Location	5.9E 0.1N of Milton
NBI structure number	000960783906529
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-35 Hwy SB (kta) over K-53 Hwy	1956	12,849	Good
I-35 Hwy NB (kta) over K-53 Hwy	1956	12,849	Good
U-160 Hwy over Hargis Creek	2024	11,788	Good
I-35 Hwy SB (kta) over BNSF Railway	1956	11,227	Fair
I-35 Hwy NB (kta) over BNSF Railway	1956	11,227	Fair
I-35 Hwy SB (kta) over Ninnescah River	1956	11,227	Fair