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Olson Road over Ziegler Creek

Grays Harbor County, Washington · rated Fair in the 2025 National Bridge Inventory

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

Olson Road over Ziegler Creek in Grays Harbor County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1985, making it 40 years old at the 2025 inventory.
It carries about 15 vehicles a day (traffic count year 2020).
Its listed owner is the county highway agency.
It is one of 152 of the 371 inventoried bridges in Grays Harbor County rated fair (41.0%); 31 (8.4%) 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

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

Bridge	Built	Vehicles/day	Condition
US 101 over Chehalis River	1955	26,216	Poor
US 12 over Camp Creek	2024	23,177	Good
US 12 over Wynoochee River	1935	21,466	Poor
US 12 over Unnamed Tributary	2018	21,466	Good
US 12 over Wishkah River	1925	16,009	Poor
US 12 / Heron St over Wishkah River	1949	14,965	Poor