By investing continuously into new machinery and excavation methods F.H.L. has introduced to Greece and its own quarries in 2013 tunnel excavation as a very effective quarrying method. This excavation method is not only ejecting the capacities to new levels ensuring simultaneously a much longer excavation period, but keeping also the all-around-the-year workflow up. The block outcome is protected from rainfalls, maintaining simultaneously its spotless characteristics. It ensures a high speed and quality selectively excavation, lifting this way the average quality of the entire quarry. Furthermore, the optical pollution of the environment is avoided and the flora and fauna protected, by minimizing the wastage and usage of water, explosives, lubricants and heavy machinery equipment.