EXHIBIT 99.1



STATEMENT OF CHIEF FINANCIAL OFFICER UNDER 18 U.S.C. § 1350



I, Gerald L. Zuehlke, Vice President, Finance, Chief Financial Officer and
Treasurer of Potlatch Corporation (the Company), certify pursuant to section 1350 of Chapter 63 of Title 18 of the United States Code that, to my knowledge,:



| | (1) |  | the Quarterly Report of the Company on Form 10-Q for the period ending March 31, 2003, as filed with the Securities and Exchange Commission on May 14, 2003, (the
Report), fully complies with the requirements of section 13(a) 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.
| | --- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------



|                        
|------------------------
|/s/    GERALD L. ZUEHLKE
|Gerald L. Zuehlke       
|Vice President, Finance,
|Chief Financial Officer 
|and Treasurer           
|May 14, 2003            



A signed original of
this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.



---



STATEMENT OF
CHIEF EXECUTIVE OFFICER UNDER 18 U.S.C. § 1350



I, L.
Pendleton Siegel, Chairman of the Board and Chief Executive Officer of Potlatch Corporation (the Company), certify pursuant to section 1350 of Chapter 63 of Title 18 of the United States Code that, to my knowledge,:



| | (1) |  | the Quarterly Report of the Company on Form 10-Q for the period ending March 31, 2003, as filed with the Securities and Exchange Commission on May 14, 2003, (the
Report), fully complies with the requirements of section 13(a) 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.
| | --- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------



|/s/    L. PENDLETON
SIEGEL
|--------------------------
|L. Pendleton Siegel       
|Chairman of the Board and 
|Chief Executive Officer   
|May 14, 2003              



A signed original of
this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.