Carbon Energy (CRBO) 10-K 2010 FY Annual report

Exhibit 32.1

CERTIFICATION OF  PRINCIPAL EXECUTIVE OFFICER

AND PRINCIPAL FINANCIAL OFFICER PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of St. Lawrence Seaway Corporation (the “Company”) on Form 10-K for the year ended March 31, 2010 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Bernard Zimmerman, Principal Executive Officer and Principal Financial Officer  certify, pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Name:  Bernard Zimmerman

Title:    Chairman of the Board, President

and Chief Financial Officer

Date:  June 14, 2010