below and to the right are four pictures showing various aspects of the operations at our navajo coal mine in the four corners area of new mexico directly below is the 45 cubic yard bucket suspended from the boom of the walking dragline the top picture on the right shows blasting of the overburden covering the coal seams prior to its removal by the dragline in the middle picture the exposed coal is loaded into a combination carrier with a total capacity of 270 tons the bottom picture shows the coal stockpiling area from which the coal i delivered to arizona public service company's 575,000 kw generating installation standing in the background the site of our blackwater coking coal mine in queensland australia is shown below the flat terrain is ideal for strip mining operations this mine will be operative in 1968