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COMMITMENTS AND CONTINGENCIES: - Others (Details) S/ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) T | May 31, 2016 MW | Jul. 31, 2014 MW | Jun. 30, 2014 MW | Jun. 30, 2019 USD ($) item person km T | Jun. 30, 2019 PEN (S/) item person km T
Other commitments: |  |  |  |  |  |
Commitment for capital projects |  |  |  |  | $ 118,000,000.0 |
Tia Maria | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Number of kilometer industrial railway built | km |  |  |  |  | 32 | 32
Project budget |  |  |  |  | $ 1,400,000,000 |
Amount spend as of the current date |  |  |  |  | $ 335,700,000 |
Annual production ( in tons) | T |  |  |  |  | 120,000 | 120,000
Number of workers expected to be directly employed | item |  |  |  |  | 600 | 600
Number of workers expected to be indirectly employed | item |  |  |  |  | 4,200 | 4,200
Toquepala Concentrator Expansion | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Project budget |  |  |  |  | $ 1,320,000,000 |
Amount spend as of the current date |  |  |  |  | 1,291,600,000 |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  | 131,700,000 | S/ 445.0
Commitment liability recorded in the balance sheet |  |  |  |  | 62,400,000 |
Development Fund Moquegua Region | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  | $ 207,200,000 | S/ 700.0
Copper | Michiquillay | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Annual production ( in tons) | T | 225,000 |  |  |  |  |
Contingent contractual obligation | $ 400,000,000 |  |  |  |  |
Estimated mineralized material (in tons) | T | 1,150,000,000 |  |  |  |  |
Copper grade percentage | 0.63% |  |  |  |  |
Initial mine life | 25 years |  |  |  |  |
Contractual obligation paid on project | $ 12,500,000 |  |  |  |  |
Remaining amount to pay if project is developed | $ 387,500,000 |  |  |  |  |
Copper | Toquepala Concentrator Expansion | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Estimated increase in annual production (in tons) | T |  |  |  |  | 258,000 | 258,000
Estimated increase in annual production (in percent) |  |  |  |  | 52.00% | 52.00%
Educational Project | Tia Maria | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Number of persons got benefits from the programs | person |  |  |  |  | 700 | 700
Number of jobs expected to be generated | person |  |  |  |  | 9,000 | 9,000
Number of Direct Jobs Expected to be Generated | person |  |  |  |  | 3,600 | 3,600
Number of Indirect Jobs Expected to be Generated | person |  |  |  |  | 5,400 | 5,400
Educational Project | Development Fund Moquegua Region | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  | $ 32,100,000 | S/ 108.5
Water Treatment | Development Fund Moquegua Region | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  | 14,300,000 | 48.4
Social Investment For Taxes | Development Fund Moquegua Region | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  | $ 59,800,000 | S/ 202.0
Number of Infrastructure Projects Agreed for Construction |  |  |  |  | 6 |
Electroperu S.A | Power purchase agreements | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts) | MW |  |  |  | 120 |  |
Term of power purchase agreement related to sale of power plant |  |  |  | 20 years |  |
Kallpa | Power purchase agreements | Peru |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts) | MW |  |  | 120 |  |  |
Term of power purchase agreement related to sale of power plant |  | 10 years | 10 years |  |  |
Kallpa | Power purchase agreements | Peru | Maximum |  |  |  |  |  |
Other commitments: |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts) | MW |  | 80 |  |  |  |

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