By the end of next month, prisoners from Dachau had finished the barracks for prisoners and the SS.[4][5][6] The quarry near Gusen was on land leased and later purchased from the Poschacher [de] firm.[7][6] It is likely that the SS had already been planning to build a concentration camp because the deal for the Gusen quarry was made in May 1938, before that of the Mauthausen quarry.[6][8]