Frontera Copper Receives Explosives Permits and Authorization for Balance of Water Requirements for Piedras Verdes Project.

TORONTO -- All dollar amounts are expressed in United States currency unless otherwise noted.

Frontera Copper Corporation (TSX:FCC)(TSX:FCC.NT)(TSX:FCC.WT) is pleased to announce that its wholly own subsidiary Mexican subsidiary, Cobre del Mayo, S.A. de C.V. (CDM), has received the required explosives use permit from SEDENA (Secretaria de Defensa National) for the Piedras Verdes copper mine in Sonora, Mexico. The permit grants CDM the authorization to use explosives on site as required in the construction and mining activity of the Project. The granting of this permit is timely as the mining contractor's equipment has begun to arrive on site.

In addition, CDM has received the water rights authorization from the Comision Nacional de Aguas (CNA), for the outstanding 1.6 million m3 of fresh water requirements for the Project. In all, CDM has requested and received authorization for 4.0 million m3 of water annually, for the Piedras Verdes project. Water wells are now being outfitted in the well fields established earlier by the company, and CDM is completing the requirements for the use licenses to operate these individual water wells. The main well field is approximately four kilometres east of the mine site with additional wells adjacent to and north of the mine site.

"We are pleased to report that the Piedras Verdes copper project is progressing according to our plans," says Gary Loving, President and CEO of Frontera Copper. "Each milestone we accomplish allows us to continue to advance the development of the mine and we remain confident that we will be producing LME Grade "A" copper cathode in the second half of 2006."

About Frontera Copper

Frontera Copper was incorporated in March 2002 to purchase and bring into production the Piedras Verdes open pit, run-of-mine, heap leach, SXEW copper project in Sonora, Mexico. Construction activities have started at the site and the mining contractor is on schedule to begin pre-production mining activity in the fourth quarter of 2005. Copper production is expected to commence in the second half of 2006 at an annual rate of 70 million pounds per year of LME Grade "A" cathode at an average life-of-mine cash operating cost of $0.58 per pound. A total of 942 million pounds of copper is projected to be produced during the 18 year life of the project. Existing resources and prospective exploration targets adjacent to the proposed open pit have the potential to improve the economics and extend the life of the project.

Frontera Copper Corporation (TSX:FCC) (TSX:FCC.WT) (TSX:FCC.NT)