quarry steinag rozloch on the shores of the lake alpnachersee and under rotzberg hill, alpnach - canton of obwalden, switzerland

alpnach alpnachersee background big bulldozer canton coal construction digger digging earth engineering environment equipment excavation excavator extraction factory geology gravel gray heavy hill industrial industry kanton lake landscape large limestone machine machinery material mine mineral mining nature obwalden open opencast ore outdoor pit power quarry quarrying resources rock rotzberg rozloch sand schweiz shores site steinag stone switzerland technology transport transportation truck vehicle view work