Augusta Resource Provides Rosemont Copper Permit Update

DENVER, CO, Sept. 8, 2011 /PRNewswire/ - Augusta Resource Corporation (TSX/NYSE Amex: AZC) ("Augusta" or the "Company") announces that the U.S. Forest Service ("USFS") has advanced Rosemont Copper's draft Environment Impact Statement ("EIS") to the final internal review and printing stage and expects issuance to the public in mid-October.

As previously announced, copies of the preliminary draft EIS were delivered by the Coronado National Forest to the State of Arizona and local Cooperating Agencies for their final review on June 1, 2011. To ensure complete input and comments on the preliminary draft EIS, the Cooperating Agencies were granted a 30 day extension from their originally scheduled review deadline of June 30.

The Notice of Availability ("NOA") for the final draft EIS is now expected to be issued in mid-October. This will commence the final 90 day public comment period which includes several public hearings to be held in the local Tucson and Pima County area. The timeline to the announcement of the NOA includes an allowance for printing of the document. The final draft EIS will include a selection of a preferred alternative for development and an impact mitigation analysis and plan. Subsequently, the Company expects the EIS to be finalized and the Record of Decision to be issued for the Rosemont Copper project in the first quarter of 2012.

About Augusta
Augusta is a base metals company focused on advancing the Rosemont Copper deposit near Tucson, Arizona. Rosemont hosts a large copper/molybdenum reserve that may account for about 10% of US copper output once in production in 2013 (for details refer to www.augustaresource.com). The exceptional experience and strength of Augusta's management team, combined with the developed infrastructure and robust economics of the Rosemont project, will propel Augusta to become a solid mid-tier copper producer. The Company trades on the Toronto Stock Exchange and the NYSE Amex under the symbol AZC.

CAUTIONARY STATEMENTS REGARDING FORWARD LOOKING INFORMATION
Certain of the statements made and information contained herein may contain forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995 and forward-looking information within the meaning of applicable Canadian securities laws. Such forward-looking statements and forward-looking information include, but are not limited to statements concerning: the Company's plans at the Rosemont Project; estimated production; and capital and operating and cash flow estimates. Forward-looking statements or information include statements regarding the expectations and beliefs of management. Often, but not always, forward-looking statements and forward-looking information can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", or "believes" or the negatives thereof or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved. Forward-looking statements or information include, but are not limited to, statements or information with respect to known or unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company, or industry results, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements or information.

Forward-looking statements or information are subject to a variety of risks and uncertainties which could cause actual events or results to differ from those reflected in the forward-looking statements or information, including, without limitation, risks and uncertainties relating to: history of losses; requirements for additional capital; dilution; loss of its material properties; interest rates increase; global economy; no history of production; speculative nature of exploration activities; periodic interruptions to exploration, development and mining activities; environmental hazards and liability; industrial accidents; failure of processing and mining equipment; labour disputes; supply problems; commodity price fluctuations; uncertainty of production and cost estimates; the interpretation of drill results and the estimation of mineral resources and reserves; legal and regulatory proceedings and community actions; title matters; regulatory restrictions; permitting and licensing; volatility of the market price of Common Shares; insurance; competition; hedging activities; currency fluctuations; loss of key employees; as well as those factors discussed in the section entitled "Risk Factors" in the Company's Annual Information Form dated March 29, 2011. Should one or more of these risks and uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements or information. Accordingly, readers are advised not to place undue reliance on forward-looking statements or information. The Company disclaims any intent or obligation to update forward-looking statements or information except as required by law, and you are referred to the full discussion of the Company's business contained in the Company's reports filed with the securities regulatory authorities in Canada and the United States.

SOURCE Augusta Resource Corporation