In 1953, in the Netherlands, a big part of the regio `Zeeland` flooded during a raging storm. More than 1800 people lost there lives... Afterwards the Dutch secured the region with a project called the Deltawerken. The `Oosterscheldekering` is a part of it, and a huge construction --> https://en.wikipedia.org/wiki/Oosterscheldekering

According Wikipedia --> The nine-kilometre-long Oosterscheldekering (kering meaning barrier) was initially designed, and partly built, as a closed dam, but after public protests, huge sluice-gate-type doors were installed in the remaining four kilometres. These doors are normally open, but can be closed under adverse weather conditions. In this way, the saltwater marine life behind the dam is preserved and fishing can continue, while the land behind the dam is safe from the water.

The dam is based on 65 concrete pillars with 62 steel doors, each 42 metres wide. The parts were constructed in a dry dock. The area was flooded and a small fleet of special construction ships lifted the pillars and placed them in their final positions. Each pillar is between 35 and 38.75 metres high and weighs 18000 tonnes. The dam is designed to last more than 200 years.
The Oosterscheldekering is sometimes referred to as the eighth Wonder of the World. It has been declared one of the modern Seven Wonders of the World by the AmericanSociety of Civel Engenieers.

Neeltje Jans is an island, created to make this barrier.

In 1953, in the Netherlands, a big part of the regio `Zeeland` flooded during a raging storm. More than 1800 people lost there lives... Afterwards the Dutch secured the region with a project called the Deltawerken. The `Oosterscheldekering` is a part of it, and a huge construction --> https://en.wikipedia.org/wiki/Oosterscheldekering

According Wikipedia --> The nine-kilometre-long Oosterscheldekering (kering meaning barrier) was initially designed, and partly built, as a closed dam, but after public protests, huge sluice-gate-type doors were installed in the remaining four kilometres. These doors are normally open, but can be closed under adverse weather conditions. In this way, the saltwater marine life behind the dam is preserved and fishing can continue, while the land behind the dam is safe from the water.

The dam is based on 65 concrete pillars with 62 steel doors, each 42 metres wide. The parts were constructed in a dry dock. The area was flooded and a small fleet of special construction ships lifted the pillars and placed them in their final positions. Each pillar is between 35 and 38.75 metres high and weighs 18000 tonnes. The dam is designed to last more than 200 years.
The Oosterscheldekering is sometimes referred to as the eighth Wonder of the World. It has been declared one of the modern Seven Wonders of the World by the AmericanSociety of Civel Engenieers.

Neeltje Jans is an island, created to make this barrier.