Case Study: GT01

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Location: Mangateparu

Cows: 360 Spring Calving


  • Existing storage ponds were too small and not sealed to required standard
  • No stone trap leading to a lot of grit/stones in the existing pond
  • Old style irrigator over applying effluent


Ran through a number of scenarios in the Massey University dairy effluent storage calculator which revealed upgrading the irrigation system dramatically reduced the size of the pond due to increased number of irrigation days available and higher system flow rate. Other contractors were used to desludge the existing pond, reconstruct to required dimensions & line with HDPE synthetic liner.

Installed a new suitably sized shore mount pump & stirrer, extended irrigation lines & upgraded irrigator to a low rate traveller.

Key Products
Williams GB Magnum travelling rain gun
Williams Auto Shut-off Valve
Williams 3 x 6 x 1.4 metre stone trap & 3 x 9 x 1.4 metre tailings bunker
HDPE liner with geotextile underlay, gas venting & ground water drainage/leak detection system by Agruline NZ
Yardmaster 10.5 metre 7.5kw shore mount pond stirrer
Yardmaster self-priming multistage pump

is available where and when you need it through our Nationwide Dealer Network or contact Williams Engineering direct.