transalta corp said monday that it has begun a public offering of its senior notes in the us to repay certain of its debts the canadian cleanenergy company said that it intends to use the proceeds to repay 100 million canadian dollars us754 million drawn on its credit facility as well as replace balancesheet cash which it used to repay its unsecured senior notes on nov 15 transalta said it would also allocate an equal amount of money to what it raises towards new or existing eligible green projects in line with its greenbond framework the company said the details of the offering including the timing size and terms are subject to market conditions