The following requirements shall be met for new connections of individual lots and developments to the public system:
a) Approval from Auckland Council is required for any stormwater connection to a public stormwater pipeline or discharge to a waterway, roadside kerb, swale or rainwater tank, or for on-site disposal via soakage.
b) Each individual lot shall be serviced by an approved stormwater connection that is either a pipeline that is ultimately connected to a consented discharge, or on-site disposal.
c) All discharges to the road kerb, swales or treatment devices within the road reserve will remain in private ownership.
d) For new pipelines which discharge into the public network within the road reserve:
- A new pipeline serving one or two lots shall only become public at the point where it crosses into the road reserve.
- A new pipeline serving three or more lots shall only become public at the point where the third lot is connected.
e) For new pipelines which discharge in reserve land, including discharges to the public network, a watercourse or the coastal marine area:
- A new pipeline serving three or fewer lots shall remain in private ownership.
- A new pipeline serving four or more lots shall become public at the point where the fourth lot is connected.
- Only one outlet is permitted when subdividing a lot. The existing outlet shall be used where design confirms sufficient capacity. Subdivision resulting in more than one outlet requires specific Engineering Approval.
f) No pipe downstream of a public pipe can be private.
g) The point of connection is the interface between the public system and the private system. It shall be marked with a blue 25mm diameter uPVC tube extending well above the ground surface. Refer to drawing SW04 in Appendix B. The pipeline from the point of connection to the manhole, public main or outlet shall be in public ownership.
- Where the private connection pipe becomes public when crossing into the road reserve or public reserve land, the point of connection shall be at the lesser of the first joint on the private connection pipe or 1.0m inside the private boundary.
- Where the private connection pipe connects directly to a public manhole within the parent lot, the point of connection is at the manhole wall.
- Where the private connection pipe joins directly to the public main or branch line within the lot served, the point of connection shall be at the lesser of the first joint on the private connection pipe or 1.0m inside the private boundary.
h) Where a private pipeline does not connect to the public network at a chamber, a rodding eye to allow CCTV access shall be provided.
i) Where a new public pipeline is proposed within public reserve land, the developer shall provide suitable access for all future maintenance operations. Any financial burden, including all costs associated with easement, will fall on the developer.
j) Duplication of small diameter pipelines on similar alignments (i.e. construction of a new pipeline within 10m of an existing alignment) is not permitted. In some circumstances, avoiding duplication is best achieved through utilisation of an existing Auckland Transport pipeline (catchpit lead). The developer shall discuss options with Auckland Council.
Where a public connection into an Auckland Transport pipeline is required due to it being the most practicable option, the pipeline will become public from that connection point and a manhole or chamber will be required at the connection, as shown in drawing SW26 in Appendix B. Transfer of ownership from Auckland Transport to Auckland Council will be required and shall be arranged through the council’s Development Engineers. Assessment of the pipeline to be transferred is required to demonstrate that the pipeline is sized appropriately, is in good condition and complies with this code of practice.
Where the existing Auckland Transport pipeline is of insufficient capacity or condition, the developer shall construct a new pipeline of sufficient capacity for that development and for the upstream Auckland Transport road network and shall reconnect the road drainage to this new pipeline.
k) The depth of the point of connection should allow for 1m of fall between the presumed floor level and the soffit of the pipe at the point of connection.
l) Where phasing of the development requires a private connection pipe to be constructed at a later date, the branch line shall terminate 1.0m within the lot boundary and be sealed by a removable cap, with the cap and pipe painted blue. The location of this point of connection shall be marked by a blue 25mm diameter uPVC tube sited over the end cap of the connection and extending well above the ground surface.
m) Where the catchment extends upstream of the development, there shall be allowance for the stormwater pipeline to be extended through the lot to the upstream boundary. This pipe shall be sized to allow for the Maximum Probable Development (see Section 4.2.8). In order of preference, the options are:
- Build the pipe and connect to a new manhole inside the boundary of the development land, with permission from the landowner
- Build the pipe and connect to a new manhole outside the boundary of the development land, and provide an easement for the owner of the development land to connect to this manhole
- Provide an easement-in-gross a minimum of 3m in width in favour of the council to allow a pipeline to serve the development land to be built in future. An easement is not appropriate if the pipe cannot be built cost-effectively in the future, for example where a driveway, building or retaining wall is to be constructed over or near the future pipe position.
n) In general, the alignment of all public branch lines constructed on private land shall be designed using the order of preference described in Section 220.127.116.11.
o) The point of connection shall be located so it can service the lowest practical point on the property and should be capable of serving the whole of the lot. Where part of the lot is not able to be served for topographical reasons, the area of the likely or proposed building footprint and paved surfaces shall drain by gravity to the point of connection as a minimum. The internal diameter of private connection pipes shall be sized based on lot size and anticipated flows, with minimum pipe sizes in accordance with Section 18.104.22.168.
p) The point of connection shall be indicated accurately on as-built plans, with coordinates provided. As-builts shall be in accordance with the Auckland Council document Development Engineering – As-built requirements which is available on the council website.
q) No new combined sewer connections will normally be approved. Refer to Section 22.214.171.124.
Assets vested prior to the October 2013 publication of the SWCoP will remain public or private in accordance with legacy rules (codes of practice or infrastructure design manuals). Refer to drawing SW24 in Appendix B for public versus private boundary definitions for a range of ownership cases.