Country:	New Zealand
Key Area:	Water
Services:	Civil Engineering,Environmental Planning,Geotechnical Engineering,Wastewater Treatment

Opus was engaged by Farview Farms Ltd to provide services associated with development of a new effluent management system for their dairy farm conversion, near Invercargill.  The client’s preference for effluent transfer and storage was precast concrete ponds, and their preference for effluent treatment was mechanical separation.  Our inputs into this project were undertaken in three phases: investigation and design, resource consents and building consents, and certification. Site investigations, including site survey and soil test pits, were undertaken to determine the most appropriate location for effluent transfer and storage ponds.  The volume of effluent storage required was determined using Massey University’s calculator and the appropriate Hynds Hypond and Megapond were then selected.  Other factors in the design were environmental considerations including the location of ground and surface waterways and the details provided by irrigation and pump suppliers. Resource consents were sought on the basis of the engineering design, farm management practices and environmental factors.  These included land use consent for the effluent ponds, a discharge permit for effluent to land, a water permit for stock drinking and shed washdown and a gravel extraction consent to develop laneways.  Building consents for the effluent ponds were also sought from Southland District Council. Construction management was undertaken by the contractor, however once construction was complete, Opus, as suitably qualified persons, provided Environment Southland and client with certification of the design and construction of the ponds.

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