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SH 11 over Quartz Creek;three Mile

Clearwater County, Idaho · rated Fair in the 2025 National Bridge Inventory

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

SH 11 over Quartz Creek;three Mile in Clearwater County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 210 vehicles a day (traffic count year 2023).
Its listed owner is the state highway agency.
It is one of 44 of the 88 inventoried bridges in Clearwater County rated fair (50.0%); 6 (6.8%) 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	Prestressed concrete multiple box beam
Length	about 40 ft
Location	1.8 N. Pierce
NBI structure number	000000000010335
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
SH 7 over Clearwater River	1998	7,800	Fair
STC4782;GRANGEMONT over Whiskey Cr.;orofino CR.	1951	2,800	Fair
SH 7 over N.fk. Clearwater River	1999	2,100	Fair
Stc 4786;JOHNSON over Orofino Creek	1978	2,000	Good
STC4782;GRANGEMONT over Whiskey Creek;stanton Br	1954	1,900	Good
SH 8 over Ruby Creek	1976	1,000	Fair