THIS OPERATION WILL CARRY OUT THE ACTIONS INCLUDED IN THE PROJECT TO IMPROVE THE QUALITY AND GUARANTEE OF SUPPLY TO THE TOWNS OF THE SIERRA SUR DE SEVILLA, WHICH CONSISTS OF THE DEVELOPMENT OF THE NECESSARY WORK TO GUARANTEE A QUALITY WATER SUPPLY TO THE POPULATIONS OF THE SIERRA SUR DE SEVILLA. THE SET OF ACTIONS TO BE CARRIED OUT ARE GROUPED INTO TWO MAIN BLOCKS: 1)ECIJA#LA TURQUILLA-OSUNA AXIS IMPROVEMENT AND EXPANSION WORKS OF THE ECIJA PLAN CONSORTIUM’S HIGH SUPPLY SYSTEM. BEING BUILT: 1.1) NEW 2050 KW PUMPING STATION (EBAP OSUNA I). 1.2) DRIVE CONDUCTION USING F.D. 800 MM IN DIAMETER, FROM THE EBAP OSUNA I TO THE NEW PALOMAREJO REGULATORY TANK OF 18,000 M3. 1.3) NEW PALOMAREJO WAREHOUSE OF 18,000 M3. 1.4) GRAVITY PIPES OF THE NEW PALOMAREJO TANK BYPASS THE TURQUILLA USING F.D. 700MM IN DIAMETER. 1.5) GRAVITY PIPES FROM TURQUILLA TO EBAP OSUNA III USING F.D. 600 MM IN DIAMETER. 1.6) DERIVATION FROM EBAP OSUNA III TO NEW SIERRA SUR TANK USING F.D. 300 MM IN DIAMETER. 1.7) NEW SIERRA SUR DEPOSIT OF 6.125 M³. 2)WORKS OF THE BRANCH OF TURQUILLA-SIERRA SUR. BEING BUILT: 2.1) GRAVITY PIPES FROM THE TURQUILLA TO NEW RESERVOIR THE ROOSTER BEING USED F.D. 500 MM IN DIAMETER. 2.2) NEW TANK OF 8,400 M³ ROOSTER. 2.3) NEW EBAP DISTRICT STEPPE OF 107,5 KW. 2.4) DRIVE CONDUCTION EBAPCOMARCA STEPPE TO NEW RESERVOIR GENERAL REGION STEPPE USING F.D. 500 MM IN DIAMETER. 2.5) GRAVITY BYPASS CONDUCTION FROM THE NEW RESERVOIR GENERAL REGION STEPPE TO THE NEW RESERVOIR THE STRUT, FOR SUPPLY TO STEPPE, LORA DE STEPPA, CASARICHE, BADOLATOSA, PRUNA AND RODA DE ANDALUCÍA, USING F.D. 250/200 MM IN DIAMETER. 2.6) GRAVITY BYPASS CONDUCTION FROM THE NEW GENERAL RESERVOIR OF STEPPE TO PEDRERA-GILENA AND CONNECTION TO EXISTING CONDUCTION OF AGUADULCE IN PEDRERA FOR SUPPLY TO GILENA, PEDRERA AND AGUADULCE, USING F.D. 200 MM IN DIAMETER.