esteban melgar

Plan and schedule dewatering operations, aligning schedules with the mine plan and production targets. Model water balances, estimating inflows and pumping requirements. Manage pumping assets, selecting equipment and coordinating maintenance to ensure availability. Design and oversee infrastructure, including piping networks, sumps, and monitoring systems. Analyze hydrogeological data, interpreting information from wells and piezometers to optimize water control. Ensure regulatory compliance, managing discharge permits and environmental monitoring. Coordinate with stakeholders, reporting water levels and adjusting plans with operations and maintenance teams. Control budgets and costs, monitoring expenses for energy, spare parts, and contractor services. Implement continuous improvements, evaluating new technologies and conducting root-cause analyses after incidents.

Project "Saneamiento de la Bahía" Infrastructure: wastewater management potable water system construction of shafts and tunnels

• Preparation and planning corresponding to the extraction and movement of material (ore & waste) 550Kt per day. • Design of strategies for water management systems (drains, pumps and pipes). • Mine planning in sequence of weekly and monthly planning. • Daily and Weekly coordination and follow up with the operational team. • Monitoring the execution of the weekly plan in the field. • Design of ramps, tracks, tonnage report, etc. using MineSight (Hexagon). • Coordination on drilling and blasting strategy. • Complete planning on sump construction (150 000m3).

Linea 3 del Metro • Production of the running-in beams (870 pieces). • Construction of the inner road. • Order for the assembly and commissioning of the molds for the running-in beams. • Order for erection of gantry cranes (70 tons). • Drafting and preparation of the official documentation for the Client. • Construction of two galleys (160 m long each).

 Resident Engineer and Quality Control, Santa Monica (Rio Hato) • Construction and inspection of the installation of 8" sanitary pipes with their respective ICs. • Construction of 4-lane streets. • Household connections of drinking water and sanitary registers. • Management of company personnel and subcontractors (infrastructure). • Control and calculation of materials. • Execution of chronogram. • Coordination and inspection of earthworks.  Resident engineer, project: land shaping for storage building, Metro Line 3, Vacamonte • Massive earthworks. • Ground stabilization. • French drainage. • Design and construction of canals for water management.

 Quality control and supervising field engineer, altos de los lagos Colon • Inspection in the construction of the sanitary system PTAR. • Construction of 4-lane roads. • Budget management. • Construction of the main drinking water line. • Construction of sports fields. • Handling of high quantities of concrete type 650. • Quality control of concrete and drinking water system. • Subcontractor management.

 inspector in the construction of the second line of the Panama Metro: • Removal and relocation of stormwater drainage system pipes. • Removal, modification and construction of caissons - vaults to manage the new flows added to the rainwater drainage system by the subway lines. • Removal of asbestos-cement pipes affected by the construction of the subway. • Collaboration with idaan inspection for the management of damage to the water supply pipe and sewerages. • Removal and placement of asphalt 4B and flexible concrete slabs 650.Proyecto “asfaltando tu ciudad”: inspección  Proyect “asfaltando tu ciudad”: inspection (budget managed $167 million) • Road construction. • Dredging construction. • Construction and modification of ditches for rainwater management. • Construction of rainwater boxes, of different series for different flow rates. • Quality control of concrete samples. • Preparation of payment orders according to progress.