From the early 1960s through to the 1980s JDMA staff located, terrain mapped and field inspected approximately 30,000 km of natural gas pipeline route from the Arctic to locations in southern Canada and the United States. These studies involved the integration of extensive environmental and cultural data constraining route locations and extensive field reconnaissance. JDMA have also mapped geohazards along existing pipeline routes and wetlands and terrain features indicative of corrosive conditions on high pressure gas pipelines in Alberta, Saskatchewan, Manitoba and Ontario.