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Shannon Rd over Canyon Creek Ditch

Yellowstone County, Montana · rated Good in the 2025 National Bridge Inventory

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

Shannon Rd over Canyon Creek Ditch in Yellowstone County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1984, making it 41 years old at the 2025 inventory.
It carries about 1,855 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 97 of the 290 inventoried bridges in Yellowstone County rated good (33.4%); 7 (2.4%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete tee beam
Length	about 38 ft
Location	2M E Laurel
NBI structure number	U06903002+06001
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I90 over MT Power RR Spur	2023	29,488	Good
I 90 over City County Drain Ditch	1966	27,985	Fair
King Ave W over Bbwa Canal	1994	26,602	Fair
Mullowney Ln over RR	2007	23,980	Good
Mullowney Ln over RR	2007	23,980	Fair
US 87 over Int Lockwood I 90	1966	23,199	Fair