Franco's 1970 Channel Still Saves Valencia

The 60s channel that still protects Valencia

A channel about 15 kilometers long and 600 meters wide runs through southern Valencia. It is dry almost always. When the Turia river rages, this channel swallows the water and the city barely notices. Built in the 1960s after the 1957 flood, it was tested in 1971 with heavy rains. It worked then and, according to available data, has worked again now: Valencia and neighboring municipalities have not felt the effects of the DANA. The so-called Plan Sur is probably the most cost-effective public work in recent Spanish history. And also the most awkward to defend publicly.

What is Plan Sur and why was it built?

The 1957 flood overflowed the Turia as it passed through Valencia, inundating much of the urban area. The response was to divert the river into a new channel excavated south of the city, preventing water from entering the urban fabric. The project was executed in the 1960s and truly debuted in 1971, when heavy rains put it to the test. According to its defenders, the result was that the city did not flood.

The original cost is estimated at 7 billion pesetas in 1970. Updated to today's euros, it is around €1.05 billion. To put it in perspective: slightly more than half of what the new Bernabéu stadium is said to cost. A project designed for a 50 or 100-year horizon, with no short-term political return, which has protected a city of about 800,000 inhabitants.

How much flow can the new channel absorb?

The most repeated figure is the channel's capacity: around 5,000 cubic meters per second. To give an idea, the Turia in a normal flood moves a fraction of that. When the river truly overflows, the new channel absorbs the impact and the city carries on as usual.

Some argue that without this infrastructure, Valencia's streets would be muddy and there would be significant personal and material damage. Circulating estimates speak of dozens or hundreds of deaths and losses of billions of euros. These are not official figures, but partisan calculations. However, the logic of diversion is hard to refute: if the water does not enter the city, there is no urban tragedy.

The problem is not the work, but who signed it

Here the conflict begins. Plan Sur was executed under Francoism. This turns any praise of its effectiveness into a minefield. One part of the analysis argues that the work demonstrates useful infrastructure can be built outside democracy. Another responds that attributing merit to an authoritarian regime is a simplification: the engineering was done by technicians and workers, not a dictator.

The tone of the conversation oscillates between historical vindication and ideological reckoning. Some ask for recognition of the success without political bias. Others ignore the work entirely and stay in their trenches. This is the country we have: even a diversion channel becomes a banner.

Why something like this could not be built today

The most uncomfortable question compares eras. Several analyses suggest such a project would be unviable today for three reasons: environmental impact reports, the political cost of expropriation, and the time horizon. No one invests in something whose return is seen in 50 years.

The argument repeats with variations: in the 60s people worked to benefit the populace, while today the priority is seeing when bribes can be collected. It is a simplification, of course. But comparing costs and deadlines does not help defenders of the status quo.

The channel as a symbol of a country that no longer exists

Beyond the water, Plan Sur has become an object of nostalgia. In conversations, references appear to streets without certain problems, families with apartments and houses in villages, and a bright future. It is an idealization, and must be read as such. But it says something about the present: the feeling that important things are no longer being done.

The final irony is that the channel remains there, dry, doing its job silently. No one puts up a plaque. No one mentions it on the news. And when it really rains, it is the only thing preventing the city from becoming a mud pit. That, in terms of social return, is hard to beat.