Tacoma Narrows Stanchions

The Tacoma Narrows Stanchions sit directly beneath the twin Tacoma Narrows Bridges, where the sound funnels through a channel that drops to 232 feet in the middle of the crossing. Two entries make up the dive site. The East Side descent lands on a rocky slope with a cobblestone bottom in 30 to 80 feet of water. The West Stanchion entry runs a free fall to 120 feet past the west bridge pier, with big lingcod and octopus recorded along it.

The place carries a piece of American engineering history. On November 7, 1940, the original Tacoma Narrows Bridge, known then and since as Galloping Gertie, collapsed in a windstorm and became one of the most-studied engineering failures of the 20th century. The fallen span still lies at 90 to 200 feet below the current bridges, and National Geographic has called it the Pacific Northwest's most unlikely artificial reef. Recreational stanchion dives, though, work the standing piers of the current bridges rather than the deep-technical wreckage of the 1940 span.

The rocky reef biome takes two forms here: the natural rock slope of the East Side entry and the piling-and-cobblestone shelter around the standing bridge piers. Scuba is the working use. Slack-only timing is strict. The Tacoma Narrows carries the strongest tidal currents in Puget Sound outside Deception Pass, peaking around 5.5 knots and higher, and historical bridge-construction work at the site was permitted only 2 hours at a time, twice per day, because that is the only window when the water moves slowly enough.

Access is boat-only, typically from the Point Defiance boat ramp or by charter through operators such as Bandito Charters, which lists both the East Side and the West Stanchion among its featured dives. Small-boat exposure to bridge-generated wind and to heavy channel traffic is part of the setup. No marine preserve overlays the site; Marine Area 11 rules are enforced: rockfish retention is prohibited year-round, and lingcod spearfishing is permitted only from May 21 through June 15 at a maximum size of 36 inches and a daily limit of 1.