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STC7232;BLUE Lakes over Rock Creek

Twin Falls County, Idaho · rated Poor in the 2025 National Bridge Inventory

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

STC7232;BLUE Lakes over Rock Creek in Twin Falls County, Idaho, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
It was built in 1959, making it 66 years old at the 2025 inventory.
It carries about 11,500 vehicles a day (traffic count year 2023).
It is one of 5 of the 126 inventoried bridges in Twin Falls County rated poor (4.0%); 5 (4.0%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	4	Poor condition

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

Bridge	Built	Vehicles/day	Condition
US 93 over Perrine Coulee;bike Path	2006	33,000	Fair
US 93 over Snake River; Perrine Br.	1976	31,500	Fair
SH 74 over Rock Creek	1993	19,000	Good
US 30 over Perrine Coulee Canal	1960	15,500	Fair
US 93 over Rock Creek	2011	15,000	Fair
US 30 over US 30/US 93 Interchange	1997	11,000	Fair