Mangawhai Golf Course Treated Effluent Storage Tank - Design and Build

Overview Kaipara District Council is seeking a contractor to design and build a treated effluent storage tank at Mangawhai Golf Course as part of the Mangawhai Wastewater Treatment Plant Upgrade. The tank will support the beneficial reuse of tertiary treated municipal wastewater for golf course irrigation. About Treated wastewater will be conveyed to the tank through a pumped rising main provided under a separate contract. The tank will provide operational balancing between treated effluent production and irrigation demand, with abstraction to the golf course irrigation system undertaken through infrastructure provided by others. Scope The Contract Works comprise the complete design, supply, construction, testing, commissioning and handover of a glass-fused-to-steel bolted storage tank with a minimum working storage volume of 1,000 cubic metres. The completed installation shall be safe, reliable, watertight, fit for purpose and suitable for continuous exposure to treated municipal wastewater. The scope includes: Detailed civil, structural, geotechnical and hydraulic design Geotechnical verification, foundations and required ground improvement The complete tank, roof, access systems, ladders, platforms, handrails, vents, hatches and appurtenances Inlet, outlet, overflow and drain nozzles and penetrations Seals, gaskets, fasteners, coatings and corrosion protection Site establishment, earthworks, temporary works and reinstatement Testing, staged filling, hydrostatic testing and commissioning Coordination with the rising-main, irrigation and other interface contractors All design, quality, certification, warranty, operation and maintenance, commissioning and as-built documentation required by the Contract External pipework, pumps, valves, instrumentation, electrical and control systems, communications, SCADA integration and the golf course irrigation network are excluded unless expressly included elsewhere in the Contract Documents. The Contractor remains responsible for coordinating and providing all tank connection interfaces. Contract Terms and Conditions The Works shall comply with the Principal's Requirements, Contract Conditions, Contract Drawings, applicable consent conditions, the Kaipara District Council Engineering Standards 2011, applicable legislation and standards, and manufacturer requirements.