...April 22, 2021 TORONTO (S&P Global Ratings) April 22, 2021-- ¡ S&P Global Ratings today said it assigned its '###+' issue-level rating to Southern Natural Gas Co. LLC's (SNG) $300 million senior unsecured notes due 2023. The company will use proceeds from this issuance to retire the $300 million senior unsecured notes due June 2021. Once the net proceeds from this issuance and cash on hand have been used to pay down the debt, S&P Global Ratings will withdraw the '###+' rating on the June 2021 maturity. Southern Natural Gas is a 6,930-mile pipeline system moving natural gas from supply basins in Alabama, Louisiana, and Mississippi to market areas in Alabama, Florida, Georgia, Louisiana, Mississippi, South Carolina, and Tennessee. Southern Natural Gas is owned by Kinder Morgan Inc. (50%) and a subsidiary of Southern Co. (50%)....