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I-705 N-n Ramp over Terrain

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

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

I-705 N-n Ramp over Terrain in Pierce County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1996, making it 29 years old at the 2025 inventory.
It carries about 10,881 vehicles a day (traffic count year 2012).
Its listed owner is the state highway agency.
It is one of 191 of the 480 inventoried bridges in Pierce County rated fair (39.8%); 22 (4.6%) 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 prestressed concrete multiple box beam
Length	about 479 ft
Location	Jct SR 509
NBI structure number	0014747C0000000
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 Portland Ave	1962	105,864	Fair
I-5 over Portland Ave	1962	105,864	Fair
I-5 over Wapato Creek	1960	97,641	Good
I-5 over Wapato Creek	1960	97,641	Good
I-5 over Hylebos Creek	1960	96,536	Good
I-5 over Hylebos Creek	1960	96,536	Good