Home › Idaho › Jefferson County › Old Hwy 20 over Parks Lewisville Canal

Old Hwy 20 over Parks Lewisville Canal

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

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

Old Hwy 20 over Parks Lewisville Canal in Jefferson 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 1939, making it 86 years old at the 2025 inventory.
It carries about 3,500 vehicles a day (traffic count year 2023).
Its listed owner is the county highway agency.
It is one of 97 of the 125 inventoried bridges in Jefferson County rated fair (77.6%); 4 (3.2%) 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

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

Bridge	Built	Vehicles/day	Condition
US 20 over Garfield Ucon Canal	1972	34,500	Fair
US 20 over Burgess Canal	1975	28,500	Fair
US 20 Eb-wb over SH 48;RIGBY Gs	1976	28,500	Fair
US 20 Ebl & Wbl over Parks Lewisville Canal	1975	19,500	Fair
US 20 Ebl over Snake River;lorenzo Br.	1980	15,250	Fair
US 20 Wbl over Snake River;lorenzo Br.	1974	15,250	Fair