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5TH Ave over Capitol Lake

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

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

5TH Ave over Capitol Lake in Thurston 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 1948 and reconstructed in 1971, making it 77 years old at the 2025 inventory.
It carries about 19,640 vehicles a day (traffic count year 2001).
It is one of 79 of the 199 inventoried bridges in Thurston County rated fair (39.7%); 2 (1.0%) 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	Continuous concrete tee beam
Length	about 82 ft
Location	1.2 N I-5
NBI structure number	087387000000000
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
I-5 over Owr N RR	1957	69,477	Fair
I-5 over Henderson Blvd	1957	69,477	Good
I-5 over Nisqually River	1937	62,815	Fair
I-5 over Nisqually River	1967	62,815	Fair
US 101 NB over I-5 Ramps Street	1990	62,306	Good
I-5 over Pacific Ave	1957	59,814	Fair