Exhibit (24)

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act John D. Hertz or Johnathan D. Hunter, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2014, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 18, 2015.

    /S/ FREDERIC W. CORRIGAN    

DIRECTOR

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act John D. Hertz or Johnathan D. Hunter, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2014, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 18, 2015.

    /S/ BOH A. DICKEY    

DIRECTOR

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act John D. Hertz or Johnathan D. Hunter, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2014, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 18, 2015.

     /S/ BETH E. FORD          

DIRECTOR

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act John D. Hertz or Johnathan D. Hunter, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2014, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 18, 2015.

     /S/ KEVIN J. HUNT     

DIRECTOR

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act John D. Hertz or Johnathan D. Hunter, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2014, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 18, 2015.

    /S/ WILLIAM D. LARSSON    

DIRECTOR

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act John D. Hertz or Johnathan D. Hunter, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2014, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 18, 2015.

    /S/ MICHAEL T. RIORDAN    

DIRECTOR