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Ensuring the Long-Term Safety of Dumped Embankments in the former open mining area Kleinleipisch 

CustomerLausitzer und Mitteldeutsche Bergbau-Verwaltungsgesellschaft mbH (LMBV)
Project types

The object of the project is the area “Kleine Restlochkette” (‘Small Chain of Remaining Holes’) in the former open mine of Kleinleipisch with remaining holes 129 (Grünhauser Sea West), 130 (Grünhauser Sea East), 131 (Heidesea), and 131 South (Kleinleipischer Sea). The largest portion of this area is the property of the NABU-Foundation “National Naturerbe” (‘National Natural Inheritance’), the remaining areas are owned by LBMV mbH. In the investigated area, extensive measures are necessary to establish geotechnical stability. Plans include embankment leveling, massive backfilling, and the extension of a rock-fill dam. In total, the investigated area measures  167 hectares.

The project area is in an area covered by several protections. It forms a part of the FFH (Flora Fauna Habitat) Areas “Grünhaus und Erweiterung,” “Grünhaus Ergänzung,” and “Koyne,” as well as the SPA (Special Protection Area) “Lausitzer Bergbaufolgelandschaft.” In addition, the largest area is located in the core area of the protected natural area “Bergbaufolgelandschaft Grünhaus” and is a part of the large protected area “Naturpark Niederlausitzer Heidelandschaft.” IPRO created an accompanying plan for the protection of the landscape in accordance with §14 of the Federal Nature Conservancy Act.  This plan outlines the germane points regarding impact mitigation and impact compensation.

The concerns of species protection were included as a Species Protection Subject Report in the accompanying plan for landscape protection.  To that end, data on the fauna was collected and evaluated and measures for the protection of the conservation status of the local populations were derived.

For the extensive plan, the area was subdivided into eight intervention and conflict areas. The offsets for the interventions are situated in the area of the intervention. During the construction phase, the offsets will be realized with embankments designed for natural conservation and species-specific continuous ecological functionality measures. Immediately following the construction, the goal the establishment of the necessary precursors to the development of adequate habitat. To that end, indigenous grasses will be sown and seedlings planted. The area of the berms will serve principally as regosol areas, but also in selected areas for small water bodies.

In this way, the biotopes valuable from the standpoint of natural conservation can be fully offset. In the core zone of the natural protection area, alle biotopes will be set up and then left to develop naturally.

As this is a multi-year construction plan, the planned intervention will be optimized in the course of the project.

IPRO will provide an ecological supervision of the construction, including specialist support in the implementation of the plan for the protection of the landscape and the species protection subject report.  This will mean continuous assistance and consultation on the subject of natural conservation for the construction companies, as well as the supervision of the implementation of the continuous ecological functionality protection, minimization, and offset measures.

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