Bonneville Grade School -- eight grades in four classrooms -- never had an enrollment of more than 70 or so students, most of whom lived at the dam. High school students went to either Cascade Locks or Stevenson.
The school closed in 1996, its enrollment down to 11 students, its building heavily damaged by landslides caused by severe winter weather.
Bonneville School, located on the alluvial fan at elevation 55 m and about 1,500 m northwest of the steep gorge slopes, incurred damage to fencing and partial burial of the school’s parking area with muddy debris from an overflow lobe.
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The school was closed in late 1996 in response to long-term changes in student enrollment patterns, not because of the debris flow hazard.
http://www.oregonlive.com/travel/index.ssf/2010/01/bygone_bonneville.html