Analysis of information sources in references of the Wikipedia article "1980 eruption of Mount St. Helens" in English language version.
dust was found most heavily in the foothills area in southern Alberta, but may have drifted as far north as Red Deer.
Burlington Northern, as co-owner of Mount St. Helens with the federal government, was especially concerned about the future of the peak, [...] Extending from the lip of the crater down the slopes opposite the blast area, arcing 90 degrees from due south to due west, lay the remainder of the square mile that originally had formed part of the [Northern Pacific Railroad's 1864] land grant. Clearly, this portion of the mountain had no commercial use but great value as the nucleus of the national park or monument already proposed by environmental groups. In recognition of the popularity of these proposals, Burlington Northern in 1982 restored the area to the federal government.
Burlington Northern, as co-owner of Mount St. Helens with the federal government, was especially concerned about the future of the peak, [...] Extending from the lip of the crater down the slopes opposite the blast area, arcing 90 degrees from due south to due west, lay the remainder of the square mile that originally had formed part of the [Northern Pacific Railroad's 1864] land grant. Clearly, this portion of the mountain had no commercial use but great value as the nucleus of the national park or monument already proposed by environmental groups. In recognition of the popularity of these proposals, Burlington Northern in 1982 restored the area to the federal government.
