In late 2012, our internal timeline for the production of a technical report and Feasibility Study encountered what we believe would be an unreasonable delay. Within days of learning of further delays, we took a fresh approach and the result was that we announced a mineral resource estimate (see March 18, 2013 news release) and filed on SEDAR a technical report entitled Review of the Oracle Ridge Project was filed within 90 days (on April 1, 2013). The report states that for a 1.0% copper cut-off grade, the mineral resource estimate at Oracle Ridge is
-- 9.9 million tons grading 1.64% copper and 0.43 silver ounces/ton in the indicated mineral resource category containing 323 million pounds of copper and 4.2 million ounces of silver.-- 6.9 million tons grading 1.58% copper and 0.41 silver ounces/ton in the inferred mineral resource category containing 217 million pounds of copper and 2.8 million ounces of silver.
The current indicated mineral resource estimate at the time of the Feasibility Study will be included in the Feasibility Study for the Project and inferred mineral resource estimates will not be included. Following the disclosure of the resource, we've had questions from shareholders about the delay in producing a feasibility study. We have had our frustrations with this delay as well. This frustration resulted in our hiring JDS to provide engineering services and produce a feasibility study, with strict timelines and deliverables.
Another matter that shareholders ask us about regularly is permitting for Oracle Ridge. As you are aware, permitting is not entirely under any mining company's control as there are multiple stakeholders who have input during the process and success is reliant upon favourable relations with the community as well as working cooperatively with the permit-granting agencies. We have engaged in a pro-active manner with State and Federal regulatory agencies, State and County Officials and local communities to ensure stakeholders are kept informed and appraised of the project. We place a high priority on being a good corporate citizen and a responsible member of the community. We are pleased to report that thanks to the help of our excellent team in Tucson, permitting remains on schedule. A brief review of what has been accomplished since acquiring Oracle Ridge in 2010:
-- The project Preliminary Jurisdictional Delineation ("PJD") was approved by the US Army Corp. of Engineers ("USACE") on February 6, 2013. An approved PJD is a step toward securing a Clean Water Act Section 404 permit. If the project moves toward a construction decision, final construction drawings will be compared to the PJD by USACE to determine the amount of disturbance and the permitting path forward.-- In July 2012, we announced that we had signed a Memorandum of Understanding (the "MOU") with Pima County for the development of the Mine. On July 10, 2012, the county Board of Supervisors unanimously approved a resolution in support of our proposal to re-open the Mine, and also approved and ratified the MOU.-- In December 2012, pursuant to the MOU, we exchanged with Pima County approximately 133 acres of private land for certain Pima County land that lies between the Mine site and the historical tailings facility, and is considered critical by the Corporation in ensuring access to the Mine site. In addition, the Corporation provided at least an additional 300 acres of land to Pima County as mitigation for potential disturbances related to the operation of the Oracle Ridge project.-- Oracle Mining has continued to secure access rights to the Mine site, and in the fourth quarter of 2012 received a Right of Way from the Arizona State Land Department that provides the Corporation access along the Black Hills Road to the mining operation from San Manuel.-- In July 5, 2012, we received the Class II Air Quality Operating Permit (the "Air Permit") from the Pima County Department of Environmental Quality. The application had been submitted in October 2011.-- In January 2012, we submitted the Aquifer Protection Permit ("APP") amendment application under expedited review process of the Arizona Department of Environmental Quality ("ADEQ") and in March 2013, the amended APP was granted to the Corporation.-- A preliminary draft Environmental Assessment was submitted to the U.S. Forest Service ("USFS") during the fourth quarter of 2012 in support of the Application for Transportation and Utility Systems and Facilities on Federal Lands (SF-299) permit. This permit is necessary to allow us the use of a portion of Forest Service lands.