We evaluate the condition of the mining areas prior to maintenance and give an overview of previous maintenance works of mining areas, as well as experiences and data collected during them. We will develop solutions to convert artificial bodies of water, with good ecological potential, into nature identical and draw conclusions on how areas that have been in economic use, can again become beneficial to society as part of the circular economy. We will perform studies on the northeastern corner of the Aidu quarry, in the Ubja quarry, in tranche No 13 of the Narva quarry and in the Sirgala extracting permit area, of the Viivikonna quarry.
The overview of pilot areas will be compiled, by the end of 2020, based on previous studies.
The environmental monitoring of the observed pilot areas of the Aidu and Narva quarry tranche No 13, will be performed by the Enefit Kaevandused AS, but the monitoring will be limited to the taking of isolated water samples and monthly measurements of water levels. There are no usable monitoring stations in these pilot areas in the database of the Estonian Nature Information System (EELIS). The monitoring bore holes that once existed have been liquidated, during the conducting of mining works.