Atna Announces Increase in Previously Announced Financing to C$15,000,000

/THIS NEWS RELEASE IS INTENDED FOR DISTRIBUTION IN CANADA ONLY AND IS NOT INTENDED FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR DISSEMINATION IN THE UNITED STATES./

GOLDEN, CO, Aug. 22, 2012 /CNW/ - Atna Resources Ltd. ("Atna" or the "Company") (TSX:ATN / OTCBB:ATNAF) is pleased to announce that it has amended the terms of the previously announced bought deal public offering with Canaccord Genuity Corp. ("Canaccord" or the "Underwriter") to increase the size of the offering by an additional 2,500,000 common shares of the Company (the "Common Shares").  Under the amended terms of the offering, the Underwriter has agreed to purchase an aggregate of 15,000,000 Common Shares at a price of C$1.00 per Common Share for total gross proceeds of C$15,000,000 (the "Offering").

In addition, the Underwriter and the Company agreed to amend the terms of the Over-Allotment Option (the "Amended Over-Allotment Option") to allow the Underwriter to purchase up to 2,250,000 Common Shares at the offer price and on the same terms as the offering, exercisable at any time, in whole or in part, for a period of 30 days after and including the closing date of the offering.  If the Amended Over-Allotment Option is exercised in full, an additional C$2,250,000 will be raised pursuant to the Offering, for total aggregate gross proceeds of C$17,250,000.

The net proceeds are intended to be used by the Company for the continued development of the Pinson and Reward projects as well as other properties and for general corporate and working capital purposes.

The offering is subject to the receipt of all necessary regulatory and stock exchange approvals, including the approval of the Toronto Stock Exchange and applicable securities regulatory authorities.

This news release does not constitute an offer to sell or a solicitation of an offer to buy any of the securities of Atna Resources Ltd. in the United States, nor shall there be any sale of the securities in any jurisdiction in which such offer, solicitation or sale would be unlawful. The securities offered have not been and will not be registered under the United States Securities Act of 1933, as amended (the "U.S. Securities Act") or any U.S. state securities laws and may not be offered or sold within the United States or to, or for the account or benefit of, U.S. Persons unless registered under the U.S. Securities Act and applicable state securities laws or unless an exemption from such registration is available.

For additional information on Atna Resources Ltd., please visit our website at www.atna.com. Further information can be found in our filings with Canadian securities regulators on SEDAR or U.S regulators on EDGAR.

This press release contains certain "forward-looking statements," as defined in the United States Private Securities Litigation Reform Act of 1995, and within the meaning of Canadian securities legislation. Forward-looking statements are statements that are not historical fact. They are based on the beliefs, estimates and opinions of the Company's management on the date the statements are made and they involve a number of risks and uncertainties. Consequently, there can be no assurances that such statements will prove to be accurate and actual results and future events could differ materially from those anticipated in such statements. The Company undertakes no obligation to update these forward-looking statements if management's beliefs, estimates or opinions, or other factors, should change. Factors that could cause future results to differ materially from those anticipated in these forward-looking statements include: the Company might encounter problems such as the significant depreciation of metals prices; accidents and other risks associated with mining exploration and development operations; the risk that the Company will encounter unanticipated geological factors; the Company's need for and ability to obtain additional financing; the possibility that the Company may not be able to secure permitting and other governmental clearances necessary to carry out the Company's exploration programs; the Company may not be able to obtain the required acceptances and approvals for the subject securities offering from the TSX and the applicable securities regulators; and the other risk factors discussed in greater detail in the Company's various filings on SEDAR (www.sedar.com) with Canadian securities regulators and its filings with the U.S. Securities and Exchange Commission.

Cautionary Note to U.S. Investors --- The United States Securities and Exchange Commission permits U.S. mining companies, in their filings with the SEC, to disclose only those mineral deposits that a company can economically and legally extract or produce. We use certain terms in this report, such as "measured," "indicated," "inferred," and "resources," that the SEC guidelines strictly prohibit U.S. registered companies from including in their filings with the SEC.

Neither the TSX nor its regulation services provider (as that term is defined in the policies of the TSX) accepts responsibility for the adequacy and accuracy of this press release.

SOURCE: Atna Resources Ltd.

James Hesketh, President and CEO - [phone]
Valerie Kimball, Investor Relations - toll free [phone]
www.atna.com