Nielsen Information and photography supplied by Deanne Nielsen, Lindsay Nielsen Hickle, and Dave Bohn. Information and photography supplied by Deanne Nielsen, Lindsay Nielsen Hickle, and Dave Bohn. Album 2: High Chugach Mountains Approximately 150 slides cover the first expeditions to the central Chugach Mountains which were made in 1955 and 1957. The area covered is upper Columbia Glacier, with first ascents of Mts. Einstein, Witherspoon, Valhalla and several lesser peaks. Most of which were named by Nielsen and this expedition, sponsored by the Arctic Institute of North America. Scientific research was measuring snow accumulation at various levels on Columbia Glacier. Photocopies of the scientific articles by Dr. Nielsen and separate articles describing the first ascents of the major peaks written by Nielsen and Dave Bohn.