Unfortunately, dark clouds soon appeared on the horizon again. Exactly at the time of the opening of the Klostermühle guesthouse, on 30 May 1973, the federal government decided to develop the Saar from Saarbrücken to the Moselle into a major shipping route. The consequences of this for us and our new business were not yet foreseeable at that time. The contract for the expansion of the Saar hydropower plants Schoden, Serrig, Mettlach and Rehlingen was signed in Andernach on 29 April 1977. To make the Saar navigable, the water level had to be raised by 4.3 metres. For us, this meant that the level of the stream had to be raised to approximately ground floor height. Now our house was to be enclosed with a sealing wall to be secured against the raised groundwater level. This would have made it impossible to expand the Klostermühle guesthouse.
Due to the low gradient of the Ockfener Bach and a relatively large catchment area, there was a danger that in the event of a severe local thunderstorm, the wine cellar would have filled up within a few minutes. With a sealing wall, the water would not have been able to escape. Moreover, no one could guarantee that the stability of the very old foundation walls of the cellar, dating back to the 16th century, would have held. Unlike Saar floods, which are visible 6 to 8 hours in advance, and which we also experienced more often in the 1970s and 1980s, a locally rising water level would not have been foreseeable. Necessary precautions to prevent damage would not have been possible.
On 19 January 1977, the first discussion took place between the Water and Shipping Directorate Southwest and the Minn family. This was about the "adaptation of the Minn estate to the conditions after the expansion of the Saar". Years of legal disputes between Minn and the Federal Republic of Germany (Federal Waterways and Shipping Administration, Saarbrücken and Mainz) put a strain on our family's health and also on the business. Customers stayed away because they suspected excavators, noise and traffic obstructions. The newly established customer base from the neighbouring Saarland broke up because the journey became very difficult for the guests and Sunday could no longer be spent undisturbed.
While the Saar expansion measures were progressing, expert opinions were drawn up on our house. A settlement was reached between the two opposing parties. The settlement provided for a compensation sum and our family, led by Regina Minn, decided to build a completely new house. This decision was the foundation stone for the development of two businesses, the hotel-restaurant and the winery. The time for the completion of the Saar expansion was approaching and the dam date was approaching. Landsiedlung Koblenz helped to implement the many ideas.