Medellin-based international electric-power transmitter and highway concessionaire ISA announced May 9 that its first quarter (1Q) 2018 net income rose 24% year-on-year, to COP$297 billion (US$103 million). Gross revenues climbed 3.6% year-on-year, to COP$1.6 trillion (US$558 million), while earnings before interest, taxes, depreciation and amortization (EBITDA) rose 12%