+34 91 782 34 00info@ossaint.com OUR SERVICES COMPANY NEWS SUSTAINABILITY JOBS CONTACT ENERGY In the area of Energy, OSSA works in the construction of underground works in projects for hydroelectric power plants; large-scale caverns to house generators; shafts for pressure pipes and accesses; and conduits, diversions and restorations. In the past several years, OSSA has participated in the construction of seven underground hydroelectric power plants. Some of these have been the most important in Europe, such as the hydroelectric facility at Cortes-La Muela in Valencia, Spain, with 630 MW of power. The complete satisfaction felt by our clients means we are considered one of the leaders in executing underground works of this type, participating from the desing stages, design and method statements. Conduits, Diversions and Restorations Large-Scale Caverns Hydroelectric power plants also need a set of complementary works of special characteristics: conduits, diversions and restorations, which involve enormous construction variety depending on the diameter, section type, longitudes and terrain. OSSA has carried out projects for excavation, support and concrete work many tunnels and shafts with different characteristics, while complying with the quality requirements and deadlines specified by our clients Download Presentation SOME OF OUR WORKS Show All Conduits, Diversions and Restorations Large-Scale Caverns © Copyright 2021. OSSA. || OSSA, over 65 years shaping pathways underground Privacy Policy Legal Conditions Cookies Policy

+34 91 782 34 00info@ossaint.com OUR SERVICES COMPANY NEWS SUSTAINABILITY JOBS CONTACT MINING In the area of Mining, the activity that gave rise to the company in 1952, OSSA is the Spanish leader in projects for underground works in coal, metal and ornamental stone mining, in the operation of the mine itself and in the development of mining infrastructure. In addition, it handles execution of vertical shafts, access galleries and large-scale caverns for placement of auxiliary services such as tanks, underground workshops, crushing plants and pump rooms. In doing so, OSSA has relied on the confidence of large mining multinationals, including CODELCO, Southern Perú Copper Co., Río Tinto Minera, Narcea Goldmines, Somincor, Pizarras Expiz, Iberpotash, Hullera Vasco-Leonesa and Hunosa. These companies place OSSA as a solid, reliable partner for the large multinationals at the international level. Vertical Shafts and Mine Galleries Special Jobs, Operations and Caverns OSSA is considered one of the best companies at the international level in shaft drilling. Our work experience here covers more than 75,000 m of shafts, carried out over more than 65 years: shafts with depths up to 700 m and internal diameter up to 6.50 m. OSSA also has extensive experience – over 150,000 m – in constructing galleries, which constitute part of the essential infrastructure for latter mining operations. Download Presentation SOME OF OUR WORKS Show All Vertical Shafts and Mine Galleries Special Jobs, Operations and Caverns © Copyright 2021. OSSA. || OSSA, over 65 years shaping pathways underground Privacy Policy Legal Conditions Cookies Policy