Southwest GasCorp. has completed its public offering of $300 million of 3.80%senior notes due 2046.

BNY Mellon Capital Markets LLC, J.P. Morgan Securities LLC, MerrillLynch Pierce Fenner & Smith Inc. and Wells Fargo Securities LLC acted asrepresentatives of the underwriters, while The Bank of New York Mellon TrustCo. acted as trustee under the offering, according to a Sept. 29 SEC filing.