Cementa in Slite mines limestone in two open quarries, the Western Quarry and the File Hajdar Quarry.
In the Western Quarry, situated close to the town of Slite, Cementa mines a clayey limestone called marlstone. Mining goes from a few meters above sea level down to -26 m.a.s.l. at bench 1 and -48 m.a.s.l. at bench 2. In the end of October 2011 the mining was finished at bench 2. The deepest part of the Quarry will then be filled with water and the currently ongoing pumping of penetrating water will stop. This will create a small but deep quarry lake. A small creek, Spillingsån, crosses the area partly as a channel. In late 2013 the Spillingsån was moved to a new location along the western border of Cementa’s property. The total area of the quarry is about 89 ha.
Until 2021 Cementa will mine pure limestone in the File Hajdar Quarry. Approximately 1.5 Mton a year of limestone will be extracted from 60 m.a.s.l to 20 m.a.s.l. Later on, the mining will continue with marlstone down to 5 m.a.s.l. The total mining area is about 78 ha and will remain so until 2021. Thereafter the mining area is planned to expand.
The Western Quarry is situated in a flat area just beside road 147. The surface varies from less than a meter above sea level up to eight meters above sea level. The File Hajdar Quarry is situated five kilometers west of Slite in a limestone plateau 40-65 meters above sea level.
The habitat close to the Western Quarry consists of poor pine forest and calcareous grassland on a clayey till. Close to lake Bogeviken, in the southern part, the habitat is more wet with calcareous fens rich in Orchids.
The File Hajdar limestone plateau is generally dry with open pine and juniper forest rich in lichen and moss communities. In the western parts the Pulsatilla patens grows abundantly. Over the whole area you can also find seasonally fens (“vätar”) with specific floras and faunas.
Nature protection projects:
- The Pulsatilla Project
The aim of the project is to investigate the possibilities of establishing and increasing the number of Pulsatilla patens (Pasqueflower) in other suitable areas, and to find a solution for co-existence of quarrying activities and sustainable management of P.patens on Gotland.
The main targets of the restoration concepts are:
- to restore habitats which are useable for the important plants and habitats of the Natura 2000 sites in the region of File Hajdar. Special consideration will be given to the P. patens.
- to develop the biodiversity as much as possible.
- to restore the important habitats of the surrounding area.
- The Slite cement plant arranges plant visits every summer.
- Information meetings with neighbors where information is given regarding our mining areas and future mining plans in addition to other operational activities at the plant site.
- Cementa takes part in a local water council whose mission is to increase the water status in the area.