Crossing State Highway 2, Cross Country Drain Project 2009.
The Napier City Council provides and maintains a stormwater disposal system for the city with the aim of minimising
the effects of flooding. The system consists of open drains, stormwater mains and pump stations with about three quarters
of the city reliant on pumped systems for stormwater drainage.
The council sets and maintains standards for stormwater reticulation and appropriate levels of flood protection for the
city. The system is maintained to ensure a minimum of downtime and a full 24 hour, seven day a week emergency capability.
Napier city's stormwater drainage system can be divided into 15 catchment areas. Of these, 12 areas are each served by a
pumping station. There are four catchment areas which are exclusively rural, six exclusively urban and the balance are of
varying ratios of urban and rural.
The urban catchments are the responsibility of the Napier City Council which maintains drains and pumping systems that
serve the urban area or those parts of the drains within the urban area. The majority of the other catchments fall under
the jurisdiction of the Heretaunga Plains Flood Control Scheme maintained by the Hawke's Bay Regional Council, except for
those in Bay View, which are under city council control.
The urban stormwater system is being continually upgraded. The current design standard requires the system to be designed
to cater for the type of storm the city might expect to experience once in every 10 years in such a way that only limited
surface ponding results. Increasing infill and greenfield developments have added more buildings, driveways, roads and
sealed surfaces within the city boundaries, resulting in greater volumes of water running off the hard, impermeable surfaces
and putting pressure on the existing stormwater and pumping systems. Up until 1996, the system was based upon a two year
return period, meaning the city had a 50 per cent chance of stormwater ponding in the streets each year. There is now
about a 10 per cent chance of similar ponding in any one year, known as a 10 year return standard.
It is a huge and very expensive task that will take decades to increase the stormwater system's capacity from the old
design standard to the new design standard. The Council has been allocating funding for this purpose ever since the new
standard was introduced.
During floods, priority is given to pump station operations, in particular cleaning the screens free of weed to allow
the pumps to operate to their peak capacity.
Disclaimers and Copyright
While every endeavour has been taken by the Napier City Council to ensure that the information on this website is
accurate and up to date, Napier City Council shall not be liable for any loss suffered through the use, directly or
indirectly, of information on this website. Information contained has been assembled in good faith.
Some of the information available in this site is from the New Zealand Public domain and supplied by relevant
government agencies. Napier City Council take cannot accept any liability for its accuracy or content. Where possible
we have tried to provide links to these government agencies for further reading.
Cadastral Information derived from Land Information New Zealands' Digital Cadastral DataBase (DCDB). CROWN
Portions of the Napier City Council information and material on this site, including data, pages, documents, online
graphics and images are protected by copyright, unless specifically notified to the contrary. Externally sourced
information or material is copyright to the respective provider.
Resurface the intersection area of the Expressway and Meeanee Quay The New Zealand Transport Agency is planning to resurface the intersection area of the Expressway and Meeanee Quay in early June.
The work is due to start following Queens Birthday Weekend, weather