The Schlema-Alberoda site is located in the southwest of Saxony, to the northwest of Aue. During the production phase from 1946 to 1991, this site produced approx. 80,000 tonnes of uranium. Rehabilitation of the mines around Aue is a huge challenge as the underground workings total 60 levels reaching down to –1800 m.
The situation at the vein deposit around Aue is characterised by a multitude of near-surface cavities created during the early years of mining and which had to be reopened and backfilled as part of the remediation effort. Contaminants had to be removed, adits and day shafts were filled and sealed. As underground cleanup advanced, demolition and disassembly of surface structures and buildings could be addressed.
The Aue Operations Office also oversees remedial action at the Pöhla mine field. It includes the Pöhla-Globenstein, Hämmerlein, and Tellerhäuser subsites in the upper range of the Western Ore Mountains near the frontier with the Czech Republic. Mine cavities totalled some 1.2 million m³. Following completion of clean-up, mine flooding at this site was initiated in 1992. Flooding of the mine was complete in 1995 when the flood water level had reached the adit level.