 HOUSTON, May 10, 2021 GLOBE NEWSWIRE -- Great Lakes Dredge Dock Corporation NASDAQ: GLDD Great Lakes or the Company NASDAQ: GLDD, announced today that, subject to market conditions, it plans to offer 325 million aggregate principal amount of fixed-rate, unsecured senior notes the New Notes in a proposed private offering that will not be registered under the Securities Act of 1933, as amended the Securities Act. 