Overview -- U.S.-based Casella Waste Systems Inc. (Casella) is repaying its $180 million second lien notes with the proceeds from an add-on senior subordinated notes issuance and a planned equity offering. -- We affirmed the 'B' corporate credit rating on Casella. -- We also placed the issue-level ratings on the company's senior subordinated notes and unsecured industrial revenue bonds on CreditWatch with positive implications. -- Casella is also amending its financial c

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