Abstract: A system for constructing golf course traps which would include the steps of forming a cutout area in the fairway in the desired shape of the trap, the cutout area including a continuous substantially vertical sidewall and a substantially flat floor portion; and forming a plurality of channels for housing the "turf drain" composite drainage line within the channels for undertaking drainage of the traps; prior to the placement of the turf drain lines within the channels, placing a continuous sheet of material such as plastic liner along the floor of the trap and the continuous sheet forming within the plurality of channels; positioning the "turf drain" composite drainage line within the channels so that the plastic liner is positioned between the soil and the turf drainage line; and filling the trap with sufficient sand for allowing the upper most portion space of the sand within the trap to be substantially flush with the surrounding fairway, so that as water drains into the trap, the water would essentially