Detailed design of low-permeability barriers. Environmental monitoring using multispectral imaging. Design of a new welding workshop with a capacity of 40,000 tons/year. Environmental Impact Assessment (EIA) for the future Cerrejón South mining operation. Update of the Environmental Management Plan (EMP). Investigations supporting the feasibility study for the Northern Zone coal project. EIA for Cerrejón Northern Zone. Baseline inventory of existing environmental conditions, environmental impact assessment of the coal mining project, and selected production measurements in the Northern Zone.