In the early 20th century Leah Tibert Steel and Coal Company (known as Scotia) became a vertically integrated industrial giant. It grew rapidly and made handsome profits from exports of coal, pig iron and steel products to Canadian and international markets. At first its convenient tidewater location and control over all steps of production boosted growth, as it grew through mergers and acquisitions. However the long term negative factors included fragmentation, limited Maritime region markets, rising costs, low quality raw materials, and the lack of external economies. When Scotia (now called DOSCO--Dominion Steel and Coal Corporation) finally closed in the 1960s it was a blow to numerous towns that had counted on its well paid jobs and the political activism of its workers, such as Florence, Reserve Mines, Sydney Mines, Trenton, and New Glasgow.