In addition, all mine fields in the north of Dortmund are to be drained, where the Hansa colliery was responsible for water retention until June 2014.

A total of around 13 million mВі of pit water from the former Monopol, Heinrich Robert, Radbod, Victoria, Prussia, Gneisenau, Kurl and Scharnhorst collieries will later be pumped to the surface and discharged into the Lippe. According to the plans of the RAG, three hollow pipes are to be installed each time Grimberg 2 and Haus Aden 2 are backfilled, in which deep well pumps will ensure water retention in the future. Sandbochum shaft as well as the Bergkamen shafts Grimberg 2 and Haus Aden 2 are expected to remain open for dewatering until mid-2016 and will then be filled. In the summer of 2013, the Heinrich and Robert shafts in Hamm were backfilled.

Around 60 employees remain on the mine as they are needed for the drainage and maintenance of the pumps. After the dismantling of the underground facilities was completed at the end of September 2011, the East mine was handed over to the Central Water Management in the following month. Backfilling of the Grillo 1 shaft began in November 2010, and the Lerche shaft was also backfilled nine months later. This also ended the 109-year history of coal mining in Hamm, which began in 1901 with the opening of the De Wendel mine - later renamed the Heinrich-Robert colliery and then the East Mine. On September 30, 2010, the last shift was run and coal production stopped. On September 30, 2010, the work still had 1622 miners Of these, around 600 continue to work in other mines in the Ruhr area Part of the workforce will initially remain in Hamm to carry out the dismantling work by September 2011. Only around 100 younger employees have to look for jobs in other industries. According to the works council's calculations, 2,400 of them will be able to go into adjustment as miners and then retire. The closure affects 2,500 miners who (as of 2008) were employed at the mine. The operation was discontinued for reasons of economy the deposits are not yet exhausted: coal is still stored at a depth of 1,500 meters, which would have been enough for another 25 years of mining. The Hammer mine was the only one in Germany that produced the high-priced coking coal. The short-term extension of operations was intended to compensate for the loss of production at the Saar mine, which is due to close two years earlier than planned after the earthquake in February 2008 and has already been partially shut down.

On Monday, June 9th, 2008, the Ruhrkohle Aktiengesellschaft decided to shut down the Ost mine on September 30th, 2010, nine months later than planned. ДЄerial view of the Ost mine, the main operating site in Hamm Shutdown Various shaft systems (Heinrich-Robert, Lerche, Haus Aden / Monopol), winding towers and other buildings of the Verbund-Bergwerk Ost are part of the route of industrial culture. In addition, the composite mine also used shafts 5 and 6 of the Radbod colliery, which was closed in 1990 and which became through 1975 with the Heinrich Robert colliery, for dewatering and ventilation.

Grimberg 2 shaft (cable car and weather shaft).

Lerche shaft (main material and weather shaft).

Sandbochum shaft (extending weather shaft).

Heinrich shaft ( cable car and material shaft ).

The following shafts were recently operated in the east mine: Operation of the 'Heinrich-Robert' colliery began in 1901 with the Heinrich and Robert pits, which gave them their name. The history of the mine goes back to 1873, when the digging of the Grillo 1 shaft of the вЂњMonopolвЂќ colliery in Kamen began. The length of the route network was 77 kilometers and the mine field extended over an area of вЂ‹вЂ‹285 square kilometers (as of December 31, 2008). The greatest depth of the mine was 1,470 meters. The reduction of coal occurred at a depth of 1200 (the 'Heinrich Robert') to 1,500 meters (the 'monopoly'). The annual production was around 1.5 million tons. About 2,000 people were most recently employed at the mine (as of the end of 2009). Most of them were abandoned and filled in after just a few years, as the plan provided for only seven of the 17 shafts to be retained. The shafts Heinrich, Robert, Franz, Humbert, Lerche (formerly KГ¶nigsborn 7 ), Sandbochum, House Aden 1 and 2, House Aden 6 'Langern', House Aden 7 'Romberg', Victoria 1 and 2, Kurl 3, Grimberg 2, Grillo 1, Grillo 4 and Werne 3. The composite mine was created in 1998 by amalgamating the formerly independent collieries вЂњHaus AdenвЂќ in Oberaden, вЂњ Monopol вЂќ in Bergkamen and Heinrich-Robert in Hamm.

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