The Girabolhos Dam Heads to Tender as the Zero Association Brands It a False Fix for the Mondego's Floods

The long-disputed Girabolhos dam has taken a decisive step forward. The Ministra do Ambiente (Environment Minister) Maria da Graça Carvalho launched the public tender for the concession this week in Gouveia, in the district of Guarda, reviving a hydroelectric project first drawn up under José Sócrates's Socialist government and definitively cancelled in 2016.

Spanning the municipalities of Seia and Fornos de Algodres in Guarda, and Nelas and Mangualde in Viseu, the dam would sit on the upper Mondego and is being sold as a triple-purpose scheme: storing water, generating renewable energy and, above all, helping to tame the floods that repeatedly swamp the Baixo Mondego (Lower Mondego) around Coimbra. Construction is not expected to finish until 2038.

Environmentalists cry foul

The environmental association Zero was quick to brand the project a "false solution" to Lower Mondego flooding and to demand a fresh environmental impact assessment before any concession is awarded. Its argument is one of geography: spending hundreds of millions of euros downstream, it says, does not build resilience where the problem begins — high in the Serra da Estrela mountains, where the water gathers before rushing toward the plain.

Zero was not alone. GEOTA, another environmental group, called the dam a "strategic error for the Mondego and for the country," while local mayors have pressed for firm environmental and structural guarantees in return for hosting the works. Supporters counter that the region's dikes and hydraulic infrastructure are ageing and that a new upstream reservoir, paired with maintenance downstream, is the only realistic buffer against the kind of winter deluges that have become more frequent.

The tender revives a debate Portugal has had before. When the original Girabolhos scheme was scrapped a decade ago, critics said the decision was "purely political"; its return now reopens the same fault line between flood-control engineering and the ecological cost of damming a living river.

What This Means for Expats

• If you live in the centre: Residents around Coimbra and the Mondego valley have watched repeated flooding; this project is the government's flagship answer, but relief is more than a decade away.
• Property and land: Landowners in Seia, Fornos de Algodres, Nelas and Mangualde should follow the concession terms closely, as expropriations and access works typically follow a tender of this scale.
• Environmental scrutiny: Expect a drawn-out fight over the impact assessment — the kind of clash already seen when Sabugal rejected two renewable-energy zones over land and fire fears.
• Water in context: The dam debate sits alongside warnings that a quarter of Portugal's treated water leaks from ageing pipes and efforts to track forest moisture to sharpen wildfire warnings.

With the tender now open, the coming months will test whether Girabolhos can clear its environmental hurdles — or whether, like its 2016 predecessor, it stalls before a single wall is poured.