Did an Underground Nazi Factory Cause Disaster?

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One year ago, a mudslide ripped apart this house in the town of Nachterstedt. A year later, officials are still trying to find out what caused the disaster.

One year ago, a mudslide on the shores of a lake in the German town of Nachterstedt killed three people. Now, some speculate that the cause of the disaster may have been an underground Nazi factory belonging to IG Farben.

The disaster came completely unexpectedly. Early on a Saturday morning just over a year ago, the bank of an artificial lake in Nachterstedt suddenly gave way, tumbling 100 meters into the water below. A house on the embankment was pulled into the void. Three people lost their lives.
Since then, officials from the Lausitz and Central-German Mining Administration Company (LMBV) have been investigating the disaster, trying to figure out what caused the shores of Lake Concordia -- a former open-cast coal mine -- to collapse. Late last week, they held a press conference to announce their findings: No explanation so far.
Yet the LMBV isn't alone in searching for potential causes of the deadly accident near Magdeburg. An amateur historian named Dirk Finkemeier has told the news magazine Stern that he possesses documents which may show that the collapsed house was built on top of a secret, underground Nazi military facility. Indeed, testimony from a former SS soldier given to the British army immediately after the war -- which Finkemeier came across in researching a book about underground Nazi installations -- claims that the site was the home of a chemical factory belonging to IG Farben, the manufacturer of the deadly Zyklon B gas used in the Nazi gas chambers.
"I was shocked when I heard about the accident in the radio," Finkemeier told Stern. "The name Nachterstedt was immediately familiar to me. The site was part of my manuscript."
Zyklon B?
The SS soldier, identified only as "rifleman Plumeyer," told his interrogators that he had been to the site several times and described the gas containers he saw there. His description of the roads and forest in the area, turned into a map during his interrogation, exactly match the present-day roads at the site of the accident -- the word "entrance" is scrawled directly over where the now-collapsed house was standing. The British interrogators identified the site as an "IG-Farben gas plant."
Other testimony provided by Plumeyer has proven accurate. Nevertheless, there is still potential for confusion when it comes to the alleged Nachterstedt facility. A resident of Nachterstedt named Hans-Joachim Budewell told the daily Frankfurter Rundschau that his inquiries confirmed that an IG Farben factory may have produced Zyklon B in the region, but the site was located more than a kilometer away from the site of the 2009 accident, near a village called Frose. Whether that site is related to the accident site is unclear.
The LMBV is taking Finkemeier's claims seriously. "According to current findings, there is no indication that there was a military facility at the site," a spokesman told Stern. Nevertheless, the organization has commissioned a report with the Freiburg branch of the federal Department of Military Archives in an effort to find out if Finkemeier's explanation may be correct.