Japanese contractor Obayashi has started to build a dam almost entirely with robots, addressing the industry’s labor shortage and aging workforce.

The site of the trial project is a concrete dam in Mie Prefecture, on the southeast coast of Japan’s main island. The 84-meter-high structure is slated for completion in March 2023.

Obayashi has developed automated equipment to stack concrete layers to form a dam. To further streamline the process, a plant has been built near the site to mix sand and gravel with cement to make concrete.

Building a dam requires knowledge and skill developed through years of experience. Obayashi’s automated system is expected to be a game-changer in dam construction, as well as in other applications.

“By transferring expert techniques to machines, we’re able to analyze what was once implicit knowledge,” said Akira Naito, head of Obayashi’s dam technology unit.

Every process for constructing the 334-meter-wide dam will involve some form of automation. That includes the initial work of establishing the foundation, and pouring concrete to form the body.

The dam’s body is built in layers by pouring concrete into 15-meter square partitions. Tower cranes that pour the concrete are controlled remotely by office computers, which also monitor the positioning of the partitions and the progress of construction.

Humans will man the cranes for safety reasons, but the machines are self-operating.

Keep reading on Asia.Nikkei.com