The system is part of phase two of a three-phase snow-making strategy plan. The company has so far invested $5 million to ensure extensive snow cover on the field.
Earthworks are almost complete and Ohau Snow Fields director Mike Neilson hopes the snow guns can be fired up next week, well before the field's June 28 opening.
''It's a massive project. It's really very, very exciting as we come to the end of it,'' he said.
In 2008, Ohau invested $3.5 million in stage one of the strategy to install the Techno Alpin snow-making system which included reservoirs and a pump station to cater for 3km of trenches and internal plumbing, air pipes and power and communications cables.
Work on the $1.5 million stage two started in January, involving almost 1km of 1.5m deep trenches for more underground piping to drive the snow-making equipment.
This season there will be four Techno Alpin fan guns and 23 A30 lances, fixed low-energy guns.
The snow-making system now covers two of Ohau's main top to bottom runs, via Top Flat, Boulevard and the Towers, Shirt Front and both learners' slopes.
For a small operation, it was a huge investment, but Mr Neilson said ensuring Ohau was a ''totally reliable skifield top to bottom'' was paramount.
''We get our heads down and our team does the job,'' he said.
''Craig [Ovenden] has done an outrageously good job to get it finished.''
Niwa's forecast for the next three months indicated 2014 would be ''a good year for skiing'', Mr Neilson said.
''It's looking great for opening June 28,'' he said.
