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Cautionary Notes
The United States private Securities Litigation Reform Act of 1995 provides a "safe harbour" for certain forward-looking statements. Forward-looking statements are based on the opinions and estimates of management at the date that the statements are made, and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. Such factors include, but are not limited to, risks involved in the exploration and development of mineral properties; the uncertainties involved in interpreting drilling and other exploration results; fluctuating commodity prices and exchange rates; the possibility of project cost overruns or unanticipated costs and expenses; the need to obtain additional financing and uncertainty as to the availability and terms of future financing; environmental risks and hazards; and other risks and uncertainties disclosed in the Company's current Annual Information Form filed with the Canadian securities regulatory authorities and Form 20-F filed with the United States Securities and Exchange Commission. The Company undertakes no obligation to update forward-looking statements if circumstances or management's estimates or opinions should change. The reader is cautioned not to place undue reliance on forward-looking statements.

Although "Measured Resources", "Indicated Resources" and "Inferred Resources" are categories of mineralization that are recognized and required to be disclosed by Canadian regulations, the United States Securities and Exchange Commission (the "SEC") does not recognize them. Disclosure of contained ounces is permitted under Canadian regulations, however, the SEC generally permits resources to be reported only as in place tonnage and grade.

Information released by Atna uses the terms "resources", "measured resources", "indicated resources" and "inferred resources". United States investors are advised that, while such terms are recognized and required by Canadian securities laws, the SEC does not recognize them. Under United States standards, mineralization may not be classified as a "reserve" unless the determination has been made that the mineralization could be economically and legally produced or extracted at the time the reserve determination is made. Mineral resources that are not mineral reserves do not have demonstrated economic viability. United States investors are cautioned not to assume that all or any part of measured or indicated resources will ever be converted into reserves. Inferred resources are in addition to measured and indicated resources. Further, inferred resources have a great amount of uncertainty as to their existence and as to whether they can be mined legally or economically. It cannot be assumed that all or any part of the inferred resources will ever be upgraded to a higher category. Therefore, United States investors are also cautioned not to assume that all or any part of the inferred resources exist, or that they can be mined legally or economically.

This web site contains information about adjacent properties on which we have no right to explore or mine. We advise U.S. investors that the SEC's mining guidelines strictly prohibit information of this type in documents filed with the SEC. U.S. investors are cautioned that mineral deposits on adjacent properties are not indicative of mineral deposits on our properties.