Tombstone Exploration Corporation announced in combination with Goldrock Resources Inc. and the Bonanza Mining Company that the construction phase is moving smoothly and on track for the complete build out of the heap leach pad and pond at the Bonanza Harquahala Gold Mine in La Paz County, Arizona. The earthworks for the leach pad and pond have been completed approximately three weeks early and is now ready for liner installation. To date, the principal production area has been cleared, grubbed and fine graded to plan and is now ready for the liner. The pregnant solution pond is complete and ready for liner installation, the pond berms have been compacted to engineering specifications in preparation for installation of the leach pad liner and processing facility installation. 5D Mining and Construction, General Contractor, is currently constructing access roads within the private property boundary, completing the crusher pad and associated access roads, and also finishing the carbon column pad location and the cyanide tank location. The carbon column tanks are near completion and will be shipped to site in the next two weeks. Pumps and piping have been ordered with most equipment sitting on site. All equipment will be installed upon arrival of associated equipment such as the carbon columns. Electrical boxes and materials are being built and will be available by the end of the month. Liner installation will not start until the end of August due to the lack of installation crews. The liner is now scheduled for a planned installation by the end of September. Start-up is still scheduled for the last week of September.