The tribunal received "abundant evidence" of "inefficient, uneconomic and extravagant management". These ships were uncomfortable and their excessive coal consumption made them uneconomic. It was demolished in 2013 because it was too costly and uneconomic for renovation. These sources were in due course depleted or became uneconomic. However, the remote desert location made mining generally uneconomic without onsite treatment. New techniques were used to extract gold from otherwise uneconomic ore. To build the car commercially would be a completely uneconomic enterprise. The extensive development margin in which extraction is begun of known but previously uneconomic deposits. Copper deposits found in Northern Rhodesia before the First World War proved uneconomic to develop. However these quickly proved to be uneconomic. High speed steam service continued after the war ended, but became increasingly uneconomic. Gas generators are uneconomic for providing grid stability. Hz electrical systems which were maintained until too uneconomic to continue. The service was discontinued because it was uneconomic. These factors may make it uneconomic to raise them.