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v3.19.1

1. Operations (Details Narrative) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operations Details Narrative Abstract |  |  |
Carrying amount of intangible assets | R$ 4,345 | R$ 4,345 |
Concession agreements | 35 | 51 |
Program and service contracts | 307 | 287 |
Concession agreements that will expire | 31 |  |
Period of expiration | 2019 to 2030 |  |
Carrying amount of the underlying asset | R$ 4,485,203 |  |
Gross revenue of the underlying assets | R$ 1,035,906 |  |
Gross revenue concentrated in the municipality of São Paulo | 51.52% | 55.38% | 55.46%
Intangible assets concentrated in the municipality of São Paulo | 46.97% | 46.92% |
Gross revenue | R$ 326,276 | R$ 294,658 | R$ 280,689
Intangible assets | R$ 307,566 | R$ 310,577 |
Participation in intangible assets | 12.32% |  |
Participation in gross revenues | 6.07% |  |

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