EGL Ref: 8983 23 June 2022 Page 42 WAI-985-000-REP-LC-0004_Rev0.docx This report shall only be read in its entirety. 17.0 BUILDING CODE COMPLIANCE 17.1. General A Building Consent will be required as a requirement of the New Zealand Building Code before construction can commence. It will be processed by Waikato Regional Council which is accredited by the Ministry of Business, Innovation and Employment (MBIE) as a Building Consent Authority (BCA) for dams in the North Island of New Zealand. The design documentation for the Storage 3 embankment (i.e. Design Report, Drawings and Specifications) will be prepared to provide confirmation that the work will comply with the Building Code. Relevant sections of the Building Code are discussed in the following sections. 17.2. Clause B1-Structure The requirement of this clause is to ensure that relevant structures can withstand the combination of loads that are likely to occur over its design life. The proposed design will be undertaken in accordance with the NZDSG, New Zealand and Australian standards, and referenced technical publications. A Producer Statement for Design– PS1 for Clause B1 will be provided. The design will need to be independently reviewed because it is a High PIC dam and a Producer Statement for Design Review-PS2 will be provided. 17.3. Clause B2-Durability The requirement of this clause is to ensure that building materials and construction methods are sufficiently durable with normal maintenance to have a specified design life of 50 years. The embankment is constructed of natural durable materials which are expected to remain in perpetuity. The subsurface drains use durable materials which are expected to meet the 50-year design life. In closure it is assumed that subsurface drainage pipes may block, and the design must meet stability criteria in perpetuity with this assumption. A Producer Statement for Design–PS1 for Clause B2 will be provided. 17.4. Clause E1-Surface Water The requirement of this clause is to ensure that people and property are protected from surface water flooding. Surface water run-off from the catchment area of Storage 3 is reduced as flood flows are attenuated due to storage in the pond and detention of water in the Collection Ponds and controlled with surface water drainage systems. A Producer Statement for Design–PS1 for Clause E1 will be provided. 17.5. Building (Dam Safety) Regulations 2022 The Building (Dam Safety) Regulations 2022 will take effect from 13 May 2024. They are concerned with the safety of existing dams. Storage 3 will need to comply with these regulations once it is commissioned. The regulations do not affect the proposed design or construction.
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