To help support the beverage needs of concertgoers, the Wacken Open Air festival constructed a four-mile pipeline to ease the transport of beer to the visit. The heavy metal concert attracts tens of thousands of visitors who are expected to consume approximately 400,000 liters or 105,669 gallons of beer during the event.

Wacken, a small town of around 1,800 people, sees its local population explode to over 75,000 during the open air festival thanks to the droves of head-banging visitors who make the journey into the German state of Schleswig-Holstein to enjoy the show.

The pipeline was designed to support the beer drinking needs for the entire concert and gave bartenders the ability to draw six beers a second based on its capacity. Holger Hubner, the founder of the festival, said, “With this, the grounds will not need to have any heavy trucks distributing beer barrels.”

During previous years, employees of the festival had to move dozens of barrels throughout the site almost constantly. Full ones were brought in before the shows started and empty ones were replaced as needed throughout the event. The heavy demand damaged through ground due to the rise in traffic.

The pipeline allows the traffic reduces traffic through the area, preserving the field. It also speeds up bar service as bartenders don’t have to wait for new kegs to be tapped to continue providing concertgoers with beverages.

Beer isn’t the only thing that got a dedicated pipeline for the event. Drinking water was also brought in by pipeline, and power and fiber optics also got similar treatment to ease organization and set up.

Sewage was also removed via pipeline, making it critical to keep each tube properly connected.

In a written statement, a festival spokesperson said, “Of course we will control the hygiene of the tubes all the time,” in regards to avoiding cross-contamination between different pipes.

Additional site improvements were also completed, such as the revamped drainage system to help prevent an abundance large puddles from forming. However, Hubner confirmed that the location wouldn’t be mud free, as concertgoers often enjoy the puddles and may miss them if they were completely eliminated.

The total cost of all improvements came in at approximately €1 million or $1,115,200.

h/t The Local