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300 South Street over Mill Creek

Grand County, Utah · rated Fair in the 2025 National Bridge Inventory

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

300 South Street over Mill Creek in Grand County, Utah, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 568 vehicles a day (traffic count year 2021).
Its listed owner is a city or municipal highway agency.
It is one of 98 of the 121 inventoried bridges in Grand County rated fair (81.0%); 1 (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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition


Structure	Continuous concrete culvert
Length	about 55 ft
Location	150 East 300 South Moab
NBI structure number	019007E
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US-191 (SR-191) over Mill Creek	1956	20,310	Fair
US-191 (SR-191) over Pack Creek	1955	20,310	Fair
US-191 (SR-191) over Lower Courthouse Wash	1991	14,182	Fair
US-191 over Moab Canyon Wash	2004	12,101	Fair
I-70 (SR-70) over Corral Wash	1960	11,872	Fair
I-70 (SR-70) over Crooked Wash	1960	11,872	Fair