Abstract: A system for controlling gas migration in a landfill including a gas permeable medium disposed in the trenches constructed for utility pipes to provide horizontal conduits for the gases, and a gas permeable medium disposed around the manholes and/or catch basins communicating with the utility pipes to provide vertical conduits for the gases, the vertical gas conduits communicating with the horizontal gas conduits so as to prevent the gases from entering the utility pipes. The gases are vented to the atmosphere through the manhole covers and/or the catch basin grates by way of gas permeable wall segments disposed between the manhole/catch basin sidewalls and the pavement, or are vented through vertical pipes that extend through the pavement and communicate with the horizontal gas conduits. Alternatively, the gases may be conducted from the horizontal gas conduits to the cellars of adjacent buildings and used as a fuel for heating purposes.