Welcome to our New Zealand Resources page.

This is where you will find downloadable content from our local Subject Matter Experts ranging from conference papers and abstracts right through to thought leadership articles. 

You can find the resources under the appropriate heading below:

Advisory Services

2017 Thought Leadership:

Legislative changes around contractual retentions take effect 31 March 2017. Are you ready? – Author: Stephen Moore (Contracts Engineer, MWH, now part of Stantec)

– The Construction Contracts Amendment Act 2015 made some major amendments to the Construction Contracts Act 2002 (the CCA). The changes were to be introduced in three stages.

Energy and Power

Opuha Dam Weir Enhancement

MWH is responsible for the detailed design and construction supervision of the upgrade of the Opuha Dam Downstream Weir (South Canterbury, NZ), owned and operated by Opuha Water Limited. The weir serves to reregulate releases from the Opuha Dam power station, which is typically used as a peaking station, back into the Opuha River for irrigation and environmental purposes.

The following construction updates have been prepared by Matthew Shore,  Senior Engineering Geologist – Dams & Hydropower

Click on the links below to read:

Opuha Dam Downstream Weir Enhancement – Construction Update No. 1

Opuha Dam Downstream Weir Enhancement – Construction Update No. 2

Opuha Dam Downstream Weir Enhancement – Construction Update No. 3

Opuha Dam Downstream Weir Enhancement – Construction Update No 4

Opuha Dam Downstream Weir Enhancement – Construction Update No 5

Opuha Dam Downstream Weir Enhancement – Construction Update No 6


2016 Thought Leadership:

No Room For a Median Treatment? – Think Again. IPENZ 2015 Tech Note – Author/s: Rob Partridge (National Discipline Leader – Road Safety, MWH, now part of Stantec)

– This paper outlines the installation, maintenance and road safety success of 340 metres of separation kerb with flexible posts. It will consider the crash history prior to installation and for the three years since installation. It also looks at the impact on highway speeds and the maintenance requirements. This presentation highlights the successful New Zealand application of the Saferoads Separation Kerb with Snaploc flexible posts, the first time this product was used in a highway environment. The paper highlights that the Calabar Road use case and how the implementation provides a safer road system increasingly free of death and serious injury.

Best bang for buck to boost Road Safety – Author/s: Mike Smith (Senior Road Safety Engineer, MWH Global NZ)

IPWEA NZ Conference 2016:

MWH and the Fiji Roads Authority: A Collaborative Approach To Asset Renewals – Author/s: Beth Parkin (Water and Wastewater Engineer, MWH, now part of Stantec)

– This paper explores the collaborative approach to asset renewals adopted in the Nadi and Suva Road Upgrade Project (NASRUP) in Fiji and discusses the challenges encountered, benefits realised and key lessons learnt. The paper also looks at how this collaborative approach could be applied in the New Zealand context. A collaborative approach to asset renewals requires utility operators and corridor managers to adapt their traditional renewal methods. This change of mindset has the potential to allow for innovations in design and construction and ultimately allow all utility operators to flourish.

Institute of Professional Engineers New Zealand Transportation Conference 2015:

Reducing Highway Operating Speeds Through Layout – Author/s: Jamie Povall (Team Leader – Transportation, MWH, now part of Stantec)

–  This technical note describes the safety improvement works being implemented through Manakau and Ohau townships on State Highway 1, between Otaki and Levin, approximately 80 kilometres north of Wellington City.

The improvements include measures to support a proposed speed reduction through the townships in conjunction with physical measures to positively encourage lower operating speeds. The project is considered to be innovative, using lateral movement, lane and shoulder narrowing and the provision of regular vertical relief measures to change drivers perceptions for compliance with a reduced posted speed limit.

The objective of the project is to reduce the number (and risk) of fatal and serious crashes taking place in both townships, with a secondary objective of improving the environment for the local community (by reducing the level of severance that SH1 creates and providing environmental enhancements in each township).

Urban Planning and Environmental Services

‘Changing Places’ – NZPI Annual Conference 2017 

Is there value in national direction? Author/s: Richard Peterson (Team Leader/Principal Planner, MWH, part of Stantec), Chris Nixon (Senior Economist, New Zealand Institute of Economic Research)

- In this paper, the authors consider what actual benefits and costs have arisen through the introduction of national direction.  It compares the benefits and costs predicted in the s32 evaluation and Cost Benefit Analysis for these instruments with evidence of the benefits and costs that have occurred since their introduction.

See Richard and Chris examine the answers these questions in Wellington at the NZPI Annual Conference 2017, 4-7 April. Alternatively, you can contact Richard via email here

Irrigation vs. Conservation – can they co-exist?- Author/s: Janan Dunning MNZPI (Team Leader, Urban Planning and Environmental Services – South Island)

This paper discusses, do environmental values have to be sacrificed in the pursuit of economic growth and stability?  Can the use and development of natural and physical resources align with the principles of sustainable management and avoid unduly compromising environmental values?

See Janan explore the answers to these questions and more in Wellington at the NZPI Annual Conference 2017, 4-7 April. Alternatively, you can contact Janan via email here

 IPWEA NZ Conference 2016:

National Policy Statement for Freshwater Management 2014 – Key Implications for the Consenting of Municipal Wastewater Discharges – Author/s: Garret Hall (Principal Environmental Consultant, MWH, now part of Stantec) and Chris Scrafton (Principal Planner, MWH, now part of Stantec)

– This paper discusses the implications of the recent shift in the National Policy Statement for Freshwater Management for the consenting of municipal wastewater discharges. It also reflects on the implications and interpretation of recent Environment Court decisions.


Water and Wastewater

IPWEA NZ Conference 2017

Ghost Hunting. Water Network Modelling to Find a Phantom Burst – Author: Ben Davies (Water Network Specialist)

The Queen Street Infrastructure Upgrade (Richmond) – Authors: Don Young (Principal Engineer) and Russell McGuigan (Tasman District Council)

Hastings Trunk Sewers Pipe Rehabilitation - Authors: Saadia Ali (Civil Engineer) and Gary Schofield (Senior Water Engineer)

Taking the Plunge: The future of water infrastructure delivery – Authors: David Hogg (General Manager, NZ Water) and Ian McSherry (Wellington Water)

Health_v_Safety – Author: Roger Oakley (Water Team Leader)

Water supply resilience in the Wellington region - Author: Cedric Papion (Water Network Engineer)

Stormwater New Zealand Conference 2017

Managing Industrial Stormwater – Fonterra’s Approach – Authors: Mike Roberts (Environmental Engineer) and Emily Macdonald (Fonterra)

Nutrients and Bacterial Loads in Urban Stormwater  – Author: Patricia Melero (Civil Water and Waste Engineer)

Simplifying Stormwater on a Complex Site – Author: Stephanie Thompson (Civil Water, Team Leader)

Pathways to Excellence – WaterNZ Conference and Expo 2016

Prisons, Planting and Flood Protection  – Authors: David Hogg (Group Manager Lower North Island – Water and Waste) and Caroline van Halderen (Senior Planner)

Uncovering the Influence of Climate on Water Demand – Author:Christine McCormack (Principal Engineer – Water)

So Much Happening With Legislation and Reforms in Our Water Sector: Will It Achieve Excellence? – Author: Jim Bradley (Principal Environmental and Public Health Engineer)

Wastewater Outfalls International Perspectives Relative to New Zealand – Author: Jim Bradley (Principal Environmental and Public Health Engineer)

Hastings Wastewater Outfall System – Maximum Life VS. Minimum Spend – Author: Wayne Hodson (Water and Waste Team Leader)

Balance Tank Bypass Pumping System At Richmond Water Treatment Plant – Author: Angus Buxton (Principal Mechanical Engineer )

Risk vs Cost – Protecting Hutt City Council’s Vital Wastewater River Crossing – Author: Grant Shearer (Team Leader – Delivery)

Stormwater NZ Conference 2016

Borck Creek – Strategic Stormwater Planning – Authors: James Tomkinson (Senior Water and Waste Engineer) and Chris Blythe (Tasman District Council)

Impact of the limit setting process on Stormwater discharges- Author: Sue Bennett (Principal Environmental  Scientist)

The Richmond Central Stormwater Infrastructure Upgrade – Authors: Avik Halder (Technical Development Leader) and I E McComb (Tasman District Council)

The RSS Model – Flushing out Stormwater risks – Authors: Laurie Gardiner (Principal Environmental Consultant) and J Moores (National Institute of Water and Atmospheric Research Ltd)

 IPWEA NZ Conference 2016

Delivering Innovative Infrastructure to Provide a Cleaner and Safer Environment for Our Communities – Author: Steve Shortt (Principal Project Manager) et al.

– In the coastal Auckland suburb of Kohimarama, additional storage for population growth and reduced overflows was needed, to provide a safer and cleaner environment. This paper demonstrates how Watercare, MWH and Tonkin+Taylor (Designers) and Fulton Hogan (Contractor) worked collaboratively to deliver innovative and cost-effective infrastructure while minimising the impact on the local community, mitigating project risks, and complying with consent requirements. This project is showcased as one of engineering excellence.

Adaptive Stormwater – Retrofitting Attenuation and Treatment in an Urban Environment – Author: Christopher Maguire (Group Manager Water and Waste, South Island)

– With increasing intensification of development in existing urban areas, how can we increase permeability and treatment of stormwater? Do our current policies and standards improve the existing situation or only mitigate against further deterioration? Do our street scape upgrades maximise opportunities for soakage, detention or treatment? This paper will look at existing retrofit and upgrading examples from New Zealand and internationally to showcase best practice and how we can adapt our thinking to enable our environment to flourish.