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The boy would sleep on the bunkhouse floor in a sleeping bag inside a bivy that had an alarm on its zipper triggered when someone tries to exit.

After studying the site, the architects designed a two-story, 590-square-foot bunkhouse threaded between mature fir and cedar trees behind the original cabin.

Outside, the lower level of the bunkhouse is clad in dark-stained log-cabin-style siding to match the original cabin.

To provide water for both structures, Hale designed the roof of the bunkhouse with gutters that collect rainwater, which is pumped into cisterns and filtered for use.

So she decided to build a compact bunkhouse behind the original cabin and asked the Seattle firm Shed Architecture & Design for help.