region's forestry-based economy. The provincial government redesignated Hamber as a "Class B" provincial park in 1945. Commercial logging and mining were permitted in parks given this designation. Hamber remained undeveloped throughout the 1940s and 1950s. No tourist resorts, campgrounds, trails or scenic lookouts were constructed within the park even though a considerable section of the highway which in 1962 would be officially designated the Trans-Canada passed through it. By the late 1950s it had become clear through negotiations with the United States which would ultimately lead to the Columbia River Treaty that hydroelectric dam projects would be constructed along the upper Columbia River. One of these planned projects, Mica Dam, would result in substantial environmental disruptions within the park's boundaries caused by the flooding of the Columbia River valley above the dam. Because the highway followed this valley between Revelstoke and Golden, it had to be re-routed through Roger's Pass before the dam could be built and thereby bypassed Hamber almost entirely. In light of these circumstances, provincial officials concluded that the park no longer had a legitimate reason to exist in its current form. In 1961 and 1962 the British Columbia government redrew the park's boundaries. Most of the park was deleted, except for a rump centered on Fortress Lake in a remote part of the western ranges of the Rocky Mountains. The new Hamber Provincial Park consists of only 24,518 hectares, a reduction of 98% relative to its original size. World Heritage Site In 1990 this park was included within the Canadian Rocky Mountain Parks UNESCO World Heritage Site. Together with the other national and provincial parks that comprise the Canadian Rocky Mountain Parks, the park was recognized for its natural environment and the geological and ecological significance of its mountain landscapes containing the habitats of rare and endangered species, mountain peaks, glaciers, lakes, waterfalls, canyons and limestone caves and fossils. Conservation and Recreation As a remote wilderness area, no roads traverse the park. A commercial fly-in fishing camp operates on Chisel Creek Fan on the shore of Fortress Lake during the summer months. The only other means of access are via hike-in or ski-in from Sunwapta Falls on the Icefields Parkway in Jasper National Park. It is a 22 km hike over trails to Fortress Lake. In the 1970s, construction began on a trail into the park from Kinbasket Lake via the Wood River by the British