Pyramid Salt Pty. Ltd.
Pyramid Boort Road
Pyramid Hill VIC 3575
Phone: 03 5455 1299
Fax: 03 5455 1330
Prior to European occupation, the billions
of tonnes of salt in the Murray-Darling Basin were stored in
the geological profile. However, the introduction of land clearing
and inefficient irrigation methods by European settler farmers
increased recharge to the groundwater systems.
the water tables have risen and mobilised the previously
dormant salt. The result has been the salinisation of large
volumes of groundwater and an increased discharge of natural
and induced saline water to the rivers, lakes and agricultural
When the saline watertable reaches within about
1 metre of the ground surface, capillary action causes the salts
to be drawn to the surface thus accumulating through the evaporation
in the topsoils. Depending on the concentration of these accumulated
salts in the topsoil, they can result in degradation ranging
from reduced productivity to the inability of the soil to support
any vegetation at all.
recent audit of the Murray Darling Basin indicated
“Between 3 and 5 million hectares of land in the eastern
and southern regions of the basin will be salt affected within
50-100 years” if remedial steps are not taken to reverse
this process. The Murray Darling Basin incorporates 75% of Australian
irrigation and provides over 41% of Australia’s gross
value of agricultural production.
It has long been recognised that lowering and maintaining
the water table below 1.5 – 2.0 metres could reverse this
salinisation process. Lowering of watertable can be achieved
by groundwater pumping from shallow aquifers. The problem that
existed was what to do with the groundwater pumped for such
A chance meeting between John Ross and Gavin
Privett in 1991 led to the establishment of Pyramid Salt Pty.
Ltd. The company was formed to research and develop methods
of land desalinisation through groundwater pumping and commercial
solar salt production.