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N Poe Valley Rd over Harpold Dam-lost River

Klamath County, Oregon · rated Fair in the 2025 National Bridge Inventory

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

N Poe Valley Rd over Harpold Dam-lost River in Klamath County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1964, making it 61 years old at the 2025 inventory.
It carries about 371 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 139 of the 248 inventoried bridges in Klamath County rated fair (56.0%); 11 (4.4%) 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	Timber stringer or multi-beam girder
Length	about 84 ft
Location	.03 Mi From Harpold Road
NBI structure number	35C168097800003
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Or 140 (hwy 020) over Usrs Canal	1930	20,461	Fair
Or 140 (hwy 020) over Link River	1931	19,357	Fair
Or 140 (hwy 020) over City St & UPRR	1957	19,357	Fair
Shasta Way over A Canal	1979	16,068	Good
S Side Bypass over UPRR	1986	11,928	Fair
S Side Bypass over BNSF & Klamath River	1986	11,850	Good