Exhibit 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below
constitutes and appoints Scott A. Caldwell his true and lawful attorney-in-fact and agent with full power of substitution and resubstitution, for him and in his name and/or his behalf, to do any and all acts and things and to execute any and all
instruments which said attorney-in-fact and agent may deem necessary or advisable to enable Allied Nevada Gold Corp. to comply with the Securities Exchange Act of 1934, as amended, and any rules, regulations or requirements of the Securities and
Exchange Commission in respect thereof, including, without limitation, the power and authority to sign his name in any and all capacities (including his capacity as a Director and/or Officer of Allied Nevada Gold Corp.) to the Annual Report on Form
10-K of Allied Nevada Gold Corp. for the fiscal year ended December 31, 2008 and the undersigned hereby ratifies and confirms all that said attorney-in-fact and agent or any substitute or substitutes for, shall lawfully do or cause to be done
by virtue hereof.

IN WITNESS WHEREOF, the undersigned have subscribed these presents on the dates stated.



|                                               |  |                                 |  |               
|---------------------------------------------- |  | ------------------------------- |  | --------------
|Signature                                      |  | Title                           |  | Date          
|                                               |  |                                
|/s/     ROBERT M.
BUCHAN Robert M. Buchan      |  | Executive Chairman and Director |  | March 12, 2009
|                                               |  |                                
|/s/    W. DURAND
EPPLER W. Durand Eppler       |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    JOHN W.
IVANY John W. Ivany             |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    CAMERON A.
MINGAY Cameron A. Mingay     |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    TERRY M.
PALMER Terry M. Palmer         |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    CARL
PESCIO Carl Pescio                 |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    MICHAEL B.
RICHINGS Michael B. Richings |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    D. BRUCE
SINCLAIR D. Bruce Sinclair     |  | Director                        |  | March 12, 2009
|                                               |  |                                
|/s/    ROBERT G.
WARDELL Robert G. Wardell     |  | Director                        |  | March 12, 2009