Rock blasting being done for rock quarry. Caption says, "A-33 Altus Project. First telephoto shot of large blast of the rock quarry. Three thousand one hundred and fifty pounds of .80 per cent gelatin powder was used to lift the large section of granite from the south side of the mountain. Thirty lateral holes drilled with the wagon drilling with the wagon drilling outfit at a depth of 40 feet and ten vertical holes drilled with jack hammers at a depth of 10 feet average were used to take the gelatin powder. Photo was taken from across the valley."