Point Defiance Bypass

The Point Defiance Bypass, also known as the Lakeview Subdivision and the American Lake Line, is a 14.5-mile-long (23.3 km) rail line between the cities of DuPont and Tacoma in Pierce County, Washington.

The $181.1 million project began construction in 2015 as part of general improvements to the Amtrak Cascades corridor to eliminate the slow and winding route along the Puget Sound shoreline that included single-track tunnels. It was opened on December 18, 2017, but was shut down after the first Cascades train derailed at speed on a bridge over Interstate 5 while traveling southbound near DuPont.

The Point Defiance Bypass begins at a junction with the BNSF mainline near the Nisqually River bridge, east of Lacey. The railway crosses over Interstate 5 and travels along the freeway's north side through DuPont and Joint Base Lewis–McChord (JBLM). In Lakewood, it stops at a train station and turns north, merging with the Tacoma Rail mainline. Trains continue north through South Tacoma station and follow South Tacoma Way as it makes a gradual turn to the east. The bypass passes under State Route 16 and over Pacific Avenue while approaching Tacoma Dome Station. The railway travels over the Dome District area of Tacoma along a high trestle bridge and rejoins the BNSF mainline near the Puyallup River bridge.

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