✓ verbatim from the press
ISA Energia Brasil obtained the second installation license for the Serra Dourada project in Bahia, allowing the start of construction of the 500 kV transmission line segment Juazeiro III–Campo Formoso II–Barra II. The license was issued by the Institute of Environment and Water Resources (INEMA) of Bahia in January 2026, clearing what the company calls "block 2" of the development. ✓
Press quotes (1)
"A ISA ENERGIA BRASIL, líder em transmissão de energia no País, anuncia a obtenção da Segunda Licença de Instalação (LI) emitida pelo Instituto do Meio Ambiente e Recursos Hídricos (INEMA) para a execução do Projeto Serra Dourada"
The Serra Dourada project comprises 1,093 kilometers of 500 kV transmission lines distributed across five segments: Juazeiro III–Campo Formoso II (101 km), Campo Formoso II–Barra II (312 km), Buritirama–Barra II (originally 107 km in Aneel's tender but announced by ISA as 96.50 km), Barra II–Correntina (285 km) and Correntina–Arinos 2 (309 km). The development also includes construction of three new substations. ✓
Press quotes (1)
"LT 500 kV Juazeiro III - Campo Formoso II C1, CS, com 101 km; - LT 500 kV Campo Formoso II - Barra II C1, CS, com 312 km; - LT 500 kV Buritirama - Barra II C1, CS, com 107 km; - LT 500 kV Barra II - Correntina C1, CS, com 285 km; - LT 500 kV Correntina - Arinos 2 C1, CS, com 309 km"
ISA Energia divided environmental licensing into three blocks with different agencies. The Brazilian Institute of Environment (IBAMA) issued the installation license for block 1 (Barra II–Correntina–Arinos 2) in August 2025, while INEMA was responsible for block 2. Construction of blocks 1 and 3 had already started in August 2025 and January 2026, respectively. ✓
Press quotes (1)
"A ISA ENERGIA BRASIL, líder em transmissão de energia no país, anuncia a conquista da Licença de Instalação (LI) emitida pelo Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais (IBAMA) para o trecho de 500 kV da linha de transmissão Barra II – Correntina – Arinos 2 e para a Subestação Correntina, parte integrante do Projeto Serra Dourada."
The project is part of lot 1 of Aneel's 2023 transmission auction, with estimated investment of R$ 3.157 billion and permitted annual revenue of R$ 322 million in the 2025/2026 cycle. The company projects operation start by March 2029 to expand renewable energy transmission from western Bahia. ✓
Press quotes (1)
"Com prazo máximo estipulado pela Aneel em março de 2029 para entrada em operação, o projeto Serra Dourada possui investimento de R$ 3,157 bilhões (data do leilão) e receita anual permitida (RAP) de R$ 322 milhões (ciclo 2025/2026)."
The Serra Dourada project is part of lot 1 of Aneel's 2023 transmission auction with R$ 3.157 billion investment
Covered by only some sources, or where the accounts diverge.
Covered by only some sources (1)
Construction of blocks 1 and 3 started in August 2025 and January 2026, respectively
Conflicting versions (1)
Buritirama–Barra II transmission line extension
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Why did ISA Energia reduce the Buritirama–Barra II line extension from 107 km (Aneel tender) to 96.50 km (corporate announcement)?
Why it's still unknown: No formal project amendment document was found in public records explaining the 10.5 km reduction.
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What is the protocol number and specific conditions of the Installation License issued by INEMA for block 2?
Why it's still unknown: Attempt to obtain the complete INEMA LI document failed: not located in DOU nor in searched Bahia state agency portals.
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What is the specific construction schedule for each block and the operation startup phases until March 2029?
Why it's still unknown: ISA Energia and journalistic sources did not detail internal implementation timeline beyond final operation date.