Qualification system without call for competition for list of companies qualified for construction and maintenance of tunnels, canals and hydraulic works for hydro. Contact Enel SpA, Rome, tel +39 0683055500, fax +39 0664445108, e-mail qualificazione@enel.it. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=391336-2014. Ref. ENEL LIOP02. 48/14.