Case Study: AG01

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Location: Ngatea

Cows: 600 Spring Calving


  • Existing concrete sump allowed for up to 3 days of storage before direct irrigation to pasture via Williams Spider travelling irrigator.
  • Required suitably sized storage facility and low rate irrigation system at higher flow rates.
  • Power restriction when cowshed was running so mindful of motor size on irrigation pump.


All effluent transferred from existing concrete sump to a suitably sized HDPE lined storage pond. Stored effluent then stirred and pumped to pasture via 2 x Williams GreenBack Spider travelling irrigators with the ability to run one or two irrigators at a time.

A Mono PC pump was implemented into the design due to ability to effectively run at the two different duties required while only having an 11kw motor.

Key Products
Williams 3 x 9 x 1.4 metre concrete tailings bunker
HDPE liner with geotextile underlay, gas venting & ground water drainage/leak detection system by Agruline NZ
Yardmaster Transfer Pump to replace existing pump in concrete sump
Reid & Harrison Yardmaster Shore Mount Stirrer
Mono PC Pump
Tag It Halo irrigator monitors and system control

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