THE DURABILITY OF HYDURA CONCRETE
The Journal of Hynds Group of Companies, Volume 17, Issue 1, March 2006
Four lanes from Mercer
Here comes the Boss
Ideas set in concrete
Te Apiti Wind Farm
Fresher ﬂows into
commits to Mainland
Inside: New products from Hynds Environmental
The Journal of Hynds Group of Companies, Volume 17, Issue 1, March 2006
6 Cowley Place Ph: 09 415 9259 Watermain 08
Amberley Judea connects to wastewater network 05
200 Carters Road Ph: 03 314 8455
88-98 Patiki Road Ph: 09 820 0122
25 McNulty Road Ph: 03 445 4760 Storage Tanks keep efﬂuent off N. Shore beaches 02
58 Hickory Place, Hornby Ph: 03 344 3500 Corrosion meets its match in T-Lock Lining 04
Hamilton Tanks reduce spill risk 06
256 Maeroa Road Ph: 07 847 3193
Pumping Power to Prevent Whitianga Flooding 07
1318 Omahu Road Ph: 06 879 8989 The Te Apiti Wind Farm 08
Kapiti Whitianga Waterways sets standards 10
7 Birmingham Street, Paraparaumu
Ph: 04 297 0689 Avondale upgrade successful 10
32 Ormiston Road, East Tamaki High hopes for Mercer-Longswamp four-laning 12
Ph: 09 273 3053
Nelson Small tanks provide retention relief 12
The Te Apiti Wind Farm
17 Elms Street, Wakatu Industrial Estate, Stoke
Ph: 03 543 8330
Customised culverts transform main street site 14
New Plymouth Communication ensures success 15
5 Struthers Place Ph: 06 759 8157 12
Overnight runway success 16
847 Tremaine Avenue Ph: 06 357 2638 Here Comes the Boss 17
39-41 Depot Street Ph: 07 346 0454 Precasting team sets bar higher 33
Southland Thorough drainage ensures all-weather play 35
207 Great North Road, Winton Ph: 03 236 6044
106 Tauhara Street Ph: 07 378 9915 Four lanes for Mercer - Longswamp
84-86 Newton Street, Mt Maunganui Conservation dream becomes reality 18
Ph: 07 575 5791
Waitete Road Ph: 07 878 8326
119-125 Old Hutt Road, Kaiwharawhara
Ph: 04 472 4171 Durability of Hydura Concrete 20
7-11 Arwen Place, East Tamaki, Auckland
Ph: 09 274 0316 Fax: 09 274 8393
Technical Advisory Services Environmental
33-55 Kerwyn Avenue, East Tamaki, Auckland Conservation dream becomes reality
Ph: 09 274 2388 Fax: 09 274 8393
Hynds Environmental commits to Mainland 23
Email: email@example.com New products for Hynds Environmental 24
firstname.lastname@example.org Protecting our beaches 26 20
0800 WE PIPE
Treatment train proves best solution 27
Large commercial wastewater system
installed at Mangawhai Heads 28
Protection for stormwater ponds 28
Ph: 09 571 0090 Fax: 09 571 0091 Innovation in rapid ﬂood protection 29
E-mail: email@example.com The durability of Hydura Concrete
Suite 2, 37 Wilkinson Road, Ellerslie
On the spill response trail 30
P O Box 17 388, Greenlane, Auckland Questions & Answers: Absorbents 31
South Island Fresher ﬂows into Manukau Harbour 32 41
Ph: 03 344 1370 Fax: 03 344 1375
Email: firstname.lastname@example.org Golf course system ‘out of sight’ 34
652 Halswell Junction Road, Hornby, Christchurch
PO Box 16 552, Hornby, Christchurch
John Hynds honoured 36
Hygrade Products Ltd
Crisis avoided at Dovedale 37
Ph: 09 579 4690 Fax: 09 579 6504
Humour a crowd pleaser at Fieldays 38
E-mail: email@example.com Troughs ﬁnd new home 38
667 Great South Road, Penrose, Auckland
P O Box 17 388, Greenlane, Auckland Continuous improvement approach underscores 40
Ideas set in concrete 41
Ph: 03 341 5860 Fax: 03 341 5861
43 Vickerys Road, Sockburn, Christchurch
Ideas set in concrete
What a privilege it is to chair a group of companies that now employs 500 people in 26 locations
throughout New Zealand. Our people are enthusiastic and committed to providing the best
product with the best service and a smile, and our directors are committed to continue the drive
towards operational excellence.
Hynds celebrated signiﬁcant milestones the last 18 months. The group was restructured and
now all business units report to Hynds Limited, a holding company. Farmers Concrete and
Southland Spun Pipes joined the group and we welcome Bruce McCulloch and his team of
dedicated and highly skilled employees based at Winton, just north of Invercargill. I know they
will play a signiﬁcant role in continuing the success and support of the Hynds brand.
Hygrade Products has expanded to the South Island and the newly formed southern team,
ably led by Garth Sutcliffe, is enjoying the opportunity to introduce our great service to new
customers. Also making a mark in the South Island is Hynds Environmental with Mike Strickett
and his team offering environmental products and services to a wider market.
Adrian Hynds is now the fulltime Managing Director of the Hynds Group. He led the successful
implementation of our new computer system and is now focused supporting the three Business
Unit Managers: Peter Goldsmith of Hynds Pipes, Peter Carroll of Hynds Environmental and Rhys
Langston, of Hygrade Products.
I am very proud of our young, vital and enthusiastic Management team. Executive Director
Malcolm Meacham and I ﬁnd it both a privilege and a pleasure to offer the team coaching and
The 2005/6 year looks like being a great one for the construction industry with many large
commercial projects on the go and a commitment from government to develop our
The trading situation is dynamic and all our customers are busy. The outlook is for
the current trend of strong demand in the construction industry to remain for the
foreseeable future so we are working to streamline operations and increase capacity
to ensure our customers continue to be well served.
Thank you for your continued support. I hope you enjoy this edition of New Zealand
Pipeworks, which so many of our key staff have helped to create.
Chairman of Directors
d r a i n a g e
Final pipeline construction with T-Lock liner.
Jacking pipe in entry pit.
Storage tanks keep efﬂuent off
North Shore beaches
The trouble with being in the pipe business times a year to no more than two. As the
is that most of the best work is hidden city grows from about 190,000 to about
from view. 300,000 by 2050, upgrading projects like
This is how those associated with the Browns Bay are crucial.
North Shore City Council’s $12 million-plus The new enlarged sewers and pumping
Browns Bay storage tank project – Works station not only will provide for everyday
Infrastructure Harker Underground Joint ﬂows from expected future growth, but
Venture, Consulting Engineers Sinclair will have the capacity to provide temporary
Knight Merz-Opus and Hynds – feel about storage during wet weather, when
their contribution to the job. stormwater enters the sewer system.
Part of the North Shore City Council’s $210 The Beachfront Lane and Anzac Road
million 20-year Project CARE programme to sewers have a combined storage capacity
improve its wastewater network and prevent of about 4000 cubic metres; the equivalent
sewage spillage onto some of the city’s of two Olympic swimming pools. One line,
most popular East Coast Bays beaches, the 600 metres long, runs beneath Anzac Road
Browns Bay storage tank quietly scored a and the other two 200-metre lengths are
few ﬁrsts for New Zealand. beneath the beach-front reserve.
The project involved installing three lines of The Anzac Road line, which required three
2.1-metre diameter concrete jacking pipes interjack stations, is believed to be the
about four to ﬁve metres underground longest ever completed in New Zealand. On
beneath Browns Bay’s busy shopping and the best day, 35 metres of pipe was jacked
beach areas, to provide the necessary in one 12-hour shift – a world-class effort
storage capacity. The underground sewage for this size of pipe in such conditions.
pumping station at the southern end of
The 21-month project, which is to be
Browns Bay Beach was also upgraded.
completed in February 2006, used
One of the goals of Project CARE is to cut the sophisticated engineering techniques
number of times any of the city’s beaches and underground tunnelling equipment
are closed due to sewage overﬂows during to minimise disruption to residents,
wet weather down from an average of 12 businesses and beach users. Sinclair Knight
d r a i n a g e
Merz, in association with Opus Consultants, Bays Club to install the the lines. The pipes
was the council’s consulting engineer for were jacked in immediately behind the
the project. cutter, and more than 4000 cubic metres
of material was removed from the tunnels
Hynds designed a new pipe speciﬁcally for
and associated shafts during the jacking
this contract, and manufactured more than
operation, which was completed by the end
400 2.1m-diameter concrete jacking pipes
of August 2005.
over a period of 10 months. The pipes, 2.5
metres long and weighing almost 10 tonnes The tunnelling techniques used on the
each, were cast with a 360 degrees PVC Browns Bay project challenged the
liner, to meet the council’s requirement for assumption that this method is unsuitable
a 100-year design life. for installing pipes at a depth less than
seven metres below ground level. The North
Hynds manufactured the pipes at its East
Shore Council’s design required pipes to
Tamaki plant and stored them at Papakura
be installed with just three to four metres’
to be delivered daily, as required to the
cover, ruling out tunnelling if convention
Browns Bay site. To prevent the pipes’
had been observed. Harker Underground’s
cross-sections distorting under their own
Mike Harker says the joint venture partners
huge weight, they were stored on end and
demonstrated that not only was it possible,
lifted by crane onto special vehicles to be
but it was the best possible option at
Hynds Pipe Systems representative Rob
One of the challenges with the slurry
Good was Hynds liaison ofﬁcer for the
excavation method of tunnel boring is to
project, keeping lines of communication
prevent the pressurised slurry ‘daylighting’
open between the company and contractors,
to the road or pavement above, or causing
Harker Underground and Works, on site.
Communication between the site, Hynds
and the pipe transport company, Southern Harker Underground’s sister company,
Water Cartage, was vitally important as New Zealand ﬁrm Tunnelteq, designed and
the correct number of pipes needed to be manufactured the tunnelling equipment
delivered without fail and in good time for specially to suit the challenging local
the project to progress smoothly. conditions of the Browns Bay project.
“There was only a small amount of storage “I think tunnelling and microtunnelling
on site at Browns Bay – with room for only will become more the norm,” says Mike,
about 10 of the pipes at a time – so it was a “Tunnelling has three key advantages
logistical challenge to supply the eight pipes over traditional trenching. It minimises
needed for jacking each day,” says Rob. the environmental impact, minimises
disruption to the public, and maximises
“The pipes were manufactured ahead of
worker safety, and the more work we do,
time and stored at Papakura ready to be
the more conﬁdent councils are to specify Above
shipped into Browns Bay as required. Most
this method.” (top to bottom):
days, four trucks loaded with two pipes Tunnelling machine being installed.
each made the journey to the construction Pipes being jacked into place.
Adding to the prestige of the Browns Bay
FLTR: Americo dos Santos, (HPS Technical Services Manager),
site – arriving about 7am to avoid trafﬁc project is the fact that all pipes were lined Jo Voice (Project Engineer, Works Infrastructure), Rob Good,
(HPS Sales Representative).
and parking congestion near the site.” with a corrosion-resistant PVC T-Lock liner,
another ﬁrst in New Zealand but well known Client Thien Yet Lieu, North Shore City Council
As main contractor for the pipe installation
internationally (See story page 4). Consultant Sinclair Knight Merz
section of the Browns Bay project, the Harker Engineers Opus Consultants
Underground Construction team used an Ross Cailliau, SKM
unmanned tunnelling machine controlled Hynds contact Rob Good, Sales Representative
Americo dos Santos, Technical Services Manager
remotely from a cabin placed next to the
Products 2.1m diameter Concrete Jacking Pipe
d r a i n a g e
Corrosion meets its match
in T-Lock Linings
Ameron T-Lock liner was used in all the The pipes manufactured for the Browns T-Lock Lining technical
pipes manufactured for the Browns Bay Bay Project used a full 360 degree lube information
Project, another ﬁrst in New Zealand. which was easily placed in the mould.
Once the pipes had been installed in the
Hynds Pipe Systems selected the T-Lock
line, and the jacking completed, the joints Composition: High-molecular-weight
to meet the Council’s requirement for 100 PVC resins combined with chemical-
between the pipes were sealed using PVC
year design life, based on ease of use and resistant pigments and plasticisers to
welding strips fused by hot air welding.*
long track record in sewer lines. create an inert mixture that is extruded
QA requirements meant that Ameron trained under high temperature and pressure.
T-Lock is a T ribbed polyvinyl chloride
all the welders prior to commencement of
(PVC) sheet lining material designed Impermeability: All T-Lock Lining sheets
the word and these skills are now available are tested with high-voltage electronic
speciﬁcally to protect new concrete sewer
in New Zealand. holiday protector before shipment from
pipe, structures and monolithe tunnels
from corrosion due to hydrogen sulphide Additional QA checks required the entire factory.
gas and other forms of attach. lining to be inspected and holiday tested Physical properties
once all the welding had been completed, • Thermoplastic, ﬂexible
T-Lock was ﬁrst introduced in 1947. In
and any repairs carried out and retested.
1997, sewer pipe which had been installed • Effective barrier to gas penetration
in 1951 in Orange County, California, was T-lock has other use which include • Abrasion resistant
removed for inspection, and the liner industrial applications (e.g. tanks or • Tear resistant
showed very little deterioration. structures in corrosive environments),
water treatment plants, waste disposal
T-Lock is produced in a standard 1.65mm Displays resistance to:
and treatment plants.
thickness to provide a dense, impervious,
• Dilute solutions at ambient
continuous lining to protect the concrete Ameron have a complementary product
temperatures of most mineral and
substrate. The projecting T-ribs are Arrow-Lock sheet lining system which is organic acids
designed to permanently lock the liner into produced with arrow ribs, instead of T-ribs.
• Alkaline chemicals
the concrete. The Arrow-lock is ideal for rehabilitating
corded concrete manholes and structures.
The T-lock lining is ideal for use in • Solvents
conjunction with wet cast concrete pipe.
The liner is available in sheets properly
• Vegetable and animal oil
sized to ﬁt the pipe diameter and may be
used to line any portion of the pipe up to a *Imperfections or damaged areas in the lines were • Fungi and bacteria
easily repaired by welding a PVC strip or patch where
full 360 degrees. necessary.
(Left to Right):
Cross section of T-Lock liner cast into concrete wall.
T-Lock liner in pipeline.
w a t e r m a i n
A large-diameter watermain ﬁtting is lowered into
a trench near Bethlehem.
Installation of Polyethylene Pipe.
A branch ﬁtting ready for backﬁll.
Judea connects to wastewater network
Tauranga District Council is looking on Bethlehem’s We used Hynds 525Ø concrete thrusting pipe as
population growth as an opportunity to upgrade the housing for 500mm PE pipe. For the rest of the
settlement’s wastewater infrastructure. The ﬁrst project, we laid 375Ø and 450Ø PVC piping.”
phase of this project was the installation of a new
“It wasn’t all plain sailing by any means. In Birch
sewage pump station and emergency storage at
Avenue, the industrial area of Judea, we had to
Judea, and the second was to build an extension cross a number of ‘unknown’ services and again
to connect the new pump station with Bethlehem’s had to proceed cautiously. Although we went over
wastewater system. the time stipulated in the contract, we incurred no
What normally would be a straightforward penalties because the variations were legitimate.”
engineering project was complicated by the fact A further difﬁculty was encountered at Cyprus
that the sewerage extension intersected existing Street where 600 metres of pipe had to be laid.
utility services and the busy State Highway 2. The trench went below the water table and ﬁlled
Transit prohibits any open cutting across its at high tide. Contract Manager Brett Ireland, of
highways, so directional drilling was employed to West City Construction, says the water had to be
enable a concrete duct for the sewerage pipe to be ﬁltered through scoria to remove grit prior to being
laid under the highway. pumped out.
Standard PVC piping is not preferred for this “To overcome the tidal factor, we programmed the
application, as polyethylene (PE) will give a more job around just-in-time supply, working closely with
secure system in ducts under the road. One of the Hynds to ensure we had the piping as and when we
beneﬁts is that PE can be butt-welded and installed needed it.”
as a single unit. It also has a design life of 50 years,
or more. Client Phil Burke & Graeme Jelley,
Council Engineers; Tauranga District Council
Senior Environmental Engineer Johann Mouton, of Engineer Johann Mouton, Senior Environmental Engineer;
Opus International Consultants, reports how the Opus International Consultants
pipe had to be thrust under the state highway at the Hynds contact Daryl Wheatley, Branch Manager, Tauranga
Waihi Road roundabout. Contractor Brett Ireland, Contract Manager;
West City Construction
“We had to cross a 250mmØ water main and, as Products Hythrust Jacking Pipe, Ductile Iron,
Values & Fittings, Polyethylene Pipe
often happens, we encountered a dive-down which
necessitated lowering the duct to pass underneath.
d r a i n a g e
Tanks reduce spill risk
Hauraki District Council recently installed The project went well, especially
two sewage pump stations and retention considering the sub-contractor Dave Todd,
tanks, using Hynds products and expertise. had to contend with unexpected running
The ﬁrst was at Waihi, a township water from an underground stream.
experiencing ongoing population growth,
The Ngatea units, enabling storage capacity
and the second, more recent, project was
of nine hours, were bedded on imported
for a new subdivision in Ngatea.
ﬁll to overcome the ‘puggy’ marine mud,
Completed in July last year, the Waihi common to the area.
installation at Wenlock Street included a
Hauraki District Council Utilities Overseer
pump station and retention tank comprising
Neil McKain, says: “Using the Hynds-
of three Hydura concrete pipes to provide
designed, precast pump station units and
24 hours of sewage storage capacity in the
retention tanks makes for easy installation
event of a pump or power failure.
and cost effectiveness in difﬁcult terrain”.
Hauraki District Council Senior Engineer
Hynds Sales Representative Roger Above
William Bryant says: “Waihi is an The installation of a retention tank.
Pinkerton says: “Each installation site
environmentally sensitive area which is
poses different challenges. Our aim is to Below
subject to power outs – some of which can Installed units are from the Hynds standard pump
ﬁnd the best solutions for each individual
be quite lengthy. Our aim is to avoid spills, station range.
site and situation, and ensure the job is
so we look at each site on a case-by-case
completed to the highest standards.”
basis and design accordingly.”
For the Waihi pump station, Hynds supplied
the council with a 2050mmØ, ﬂanged
base and riser, precast valve chamber, and
a one piece wet well and valve chamber
lid complete with inset alloy covers. The
retention tank comprised 2100mmØ
Hydura skid ring pipes, two with precast
end plugs set in and one with a 1050mmØ
manhole off-take set in.
These units are part of the Hynds standard
pump station range, which is available in
sizes from 1.8m to 3m. Hynds also supplied
polyethylene (PE) rising main pipework and
Client/Engineer William Bryant, Senior Engineer;
Hauraki District Council
Hynds contact Roger Pinkerton, Sales
Contractor Dave Todd; Hauraki District Council
Products Retention Tanks, Large Diameter
Precast Pipes, Hydura Concrete,
Polyethylene Pipe & Fittings
d r a i n a g e
Pumping Power to Prevent Whitianga Flooding
Whitianga is the fastest growing town in the The co-operation between Hynds, Hopper
Thames Coromandel District Council area but like Construction, Opus and Thames Coromandel
many low-lying coastal settlements, ﬂooding can District Council was crucial to the success of the
be a problem. new design as they all had speciﬁc criteria to
meet: Hynds for manufacturing/supplying product,
The Racecourse Road area of Whitianga was one
Hopper for assembly, Opus for design approval and,
area where drains often overﬂowed during heavy
of course, the TCDC, which was paying the bills.
rainfall spilling through nearby houses. The road
is close to the sea through land that once formed Opus Project Manager Peter Ireland reports the
part of the dune system but now is urbanised. pump station is in the ground, a Pohutukawa tree
Something had to be done to protect residents’ immediately alongside the pump station has been
safety and amenity. preserved.
But urban development posed additional problems, This will collect water from street sumps and the
constraining the design of a stormwater pump pump station will pump it via twin 600mmØ rising
station and pipe network, undertaken by Opus mains to a grass swale on Buffalo Beachfront.
International Consultants Limited. The space for the From there it will gravitate north towards the
pump station was limited to the road berm, making Taputapuatea Stream.
it necessary to create extra storage capacity in
In amongst all the purpose-built headwalls,
the pipe network itself, using Hynds concrete pipe
stainless steel grilles and alloy ﬂoodgates, there’s
of 1050mmØ. The pump station, which was to be
an important fact in which Whitianga’s ﬂood
positioned at the low point, had been designed as
victims of the past can take comfort: the two Flygt
a large single chamber with two pumps. It called
submersible propeller pumps are jointly capable
for a pre-cast solution but construction would have
of moving four million litres of water an hour,
required substantial sheet piling so the site could
equivalent to 4000 tonnes. How’s that for hydraulic
The contractor - Hopper Construction - approached
Hynds, and engineers from the two companies
worked together to modify the design. The new
design was made up of two vertical chambers with
an opening between the two at the bottom to allow
water to pass through to the pumps. Each vertical
chamber consisted of four box type sections with the
Right from top
bottom unit having a ﬂoor precast into it. Another
Wingwall with ﬂoodgate;
critical detail was tying the units together. The result Pump chamber under construction;
Polyethylene pipe ready for installation post welded;
was that each unit was light and easily handled,
Polyethylene pipe being installed;
making for swift assembly in just two days and the Pump station outlet structure.
need for sheet piling was considerably reduced.
The pumps were critical to the entire concept, and
two state-of-the-art pumps imported from Sweden
were chosen. In the process of re-conﬁguring the
pump station, the engineers had created two equal Client Thames Coromandel District Council
chambers, front and rear. To comply with the pump Engineers Peter Ireland, Keith Coldwell; Opus
manufacturer’s speciﬁcations, which stipulated the Hynds contact Kevin Carlyle,
Contract Sales Manager; Central Region
pumps receive a ﬂow of water with no turbulence,
Contractor Simon Kirkpatrick, Site Manager;
they then constructed a divider wall in the rear Hopper Construction
chamber, which had the desired effect. The pumps Products Watermain Fittings, Manhole Systems,
are suspended from concrete lids designed to carry Polyethylene Pipe, Ring Joint Pipe,
Concrete Lined Mild Steel Pipe, Concrete
the weight and the vibration. The usual access for Pipes, Concrete Precast Product,
Galvanised & Stainless Steel Hardware
observation and maintenance is provided.
d r a i n a g e
The Te Apiti Wind Farm
The Te Apiti Wind Farm is headed to
become a household name!
Commissioned by Meridian Energy Limited,
this $100-million-plus project was split
into two major contracts:
• the supply and erection of 55 wind
turbines undertaken by Danish
company NEG Micon, and
• the civil component - the construction
of the roads and foundations – which
was won by Palmerston North
company Higgins Projects. It was the
largest single construction contract
the company had ever undertaken.
Meridian selected a site at the southern
end of the Ruahine Ranges for the wind
farm - on Saddle Road, just north of the
Manawatu Gorge. This site was chosen
because of the consistently high wind
speeds that rarely exceed the range
necessary for wind turbines to generate
Te Apiti’s capacity, measured as the
percentage of total time during the year
when electricity can be generated, is
approximately 45% - far exceeding the
international average capacity of 23%.
The objective was to erect 55 towers, each
70 metres high and ﬁtted with a 1.65MW
turbine with three 36-metre blades. Each
of the 55 turbines sit on a foundation of
375m3 of concrete – that’s 75 truckloads
per turbine. The 55 towers will generate
electricity equivalent to meet the needs of
45,000 New Zealand homes.
A substation on Saddle Road collects
output from the 55 turbines at 22kV and
converts this to 110kV for shipment to
Transpower’s Woodville substation. From
there it is supplied to the national grid.
To gain access to the site of some
1,150ha of farmland, Higgins began with
the construction of 21km of roads. For
the roads and the actual location of the
turbines, approximately 1,200,000m3 of
earth had to be excavated.
d r a i n a g e
Higgins’s Project Manager, Paul McKnight,
says he was pleased with progress until in
February 2004 ‘Mother Nature decided to
make things difﬁcult’.
“Floods caused major slips and washed
away the Pohangina River Bridge effectively
closing Saddle Road, our main access
route from Palmerston North. Our only
access immediately was via the Pahiatua
track, adding an additional hour’s travel
time to reach the site.”
Paul’s answer was to construct a temporary
crossing to re-establish access across the
river about half a kilometre from where
the bridge had been washed out. Dubbed
‘McKnight’s Bridge’, it was used until a
Bailey Bridge could be built.
Despite this six-week delay, the construction
work was completed in accordance with
the original program.
Hynds Pipe Systems supplied Higgins
and other subcontractors with culvert From top
pipe drainage materials, manholes and Floods washed away the Pohangina River Bridge in February
electrical ducting. Hynds’s Contract Pricing Electrical PVC ducting;
Manager for the project Owen Johnston This temporary crossing of the Pohangina River Bridge,
dubbed ‘McKnight’s Bridge’, was part of 21km of roads
says: “There’s a bonus in this clean-power constructed to form road access to the wind farm site;
One turbine foundation required 75 truckloads of concrete.
solution - not only is it sustainable and
environmentally friendly, but the Te Apiti This page
Wind Farm is also an elegant landmark that A 70-metre tower dwarfs people and machinery.
has great interest as a tourist attraction. I
believe that the three councils closely When the blade tip is at 12 o’clock, the structure stands
involved - Tararua, Palmerston North and 106 metres.
Horizons Regional - are on to that!”
Client/Engineer Meridian Energy
Hynds contact Owen Johnston, Contract Pricing
Manager, Palmerston North
Contractor Paul McKnight, Project Manager;
Products Reinforced Concrete Rubber Ring Joint Pipe,
Electrical Ducting, Manhole Systems
d r a i n a g e
Whitianga Waterways sets standards
Opposite page Whitianga, on the Coromandel Peninsula, has been to supply all the underground services pipework
A bird’s eye view of the Whitianga a magnet for holidaymakers for years. The resort such as pipes for drinking water, stormwater
Waterways project during construction. township attracts boaties, ﬁshing enthusiasts, eco- control and sewerage for the Whitianga Waterways
Middle tourists and families seeking rest and relaxation development.
Aerial view of completed Whitianga amongst its beautiful, unspoilt surroundings.
Waterways stage. Another essential part of the project was to upgrade
Bottom The region is now attracting more and more the town’s infrastructure network to cope with the
Installation of polyethylene pipe. lifestylers and retired people who are keen to invest extra demand. This entailed improving water mains
in their own special piece of real estate on this and sewers and relocating some major services.
unique part of the coast.
Stage 1 of Whitianga Waterways commenced in
Whitianga Waterways began as a joint venture October 2001 and consisted of 46 lots all with canal
with local landowners and was expected to take access on their boundaries.
about 20 years to fully complete. It is a master
To date, 1.4 million cubic metres of earth have been
planned development under the control of Hopper
removed to form the canals, with about 5000 lineal
Developments and is setting new standards in
metres of rock-covered concrete walling erected
resort and residential development.
along the canal banks to prevent erosion.
Approximately 1500 sections are to be created,
Hopper’s Site Manager Dave Hooker says the
including options such as canal frontage, airﬁeld
company is now developing Stage 4, which will
frontage and standard sections. Luxury homes with
take the development’s number of sites to 236.
direct access to the water and private moorings
have become increasingly popular in recent years. Other portions of the site being developed include
The concept has proved hugely successful on the Airpark development, which contains 58 sites
This page and backs onto the Whitianga Airﬁeld.
Queensland’s Gold Coast, as is the case in New
Polyethylene pipe is ready to roll out. Zealand and is evident with another Hopper project
This part of the project also included two special
on the Coromandel, Pauanui Waterways.
Below right stormwater diversion chambers including twin
Thrusting was the most common ducting
installation method used during the Avondale Hopper Construction, a subsidiary of Hopper 1200mm culverts, which Hynds designed and
upgrade. Developments, appointed Hynds Pipe Systems precast.
Vector’s latest overhead installation programme
(OHIP) created a signiﬁcant change to the Avondale
landscape when it was completed in March this
year. The $6 million upgrade involved removing
power poles along Rosebank Road and neighbouring
streets and putting power lines underground.
Vector, Telecom and Auckland City Council, in
partnership, contracted Fulton Hogan as the
main contractor for the Avondale project with
Hynds supplying PVC and polyethylene ducting.
More than 1100 residents and businesses were
connected during the six-month project, and over
27km of ducting was installed.
d r a i n a g e
Apart from concrete pipes, Hynds has supplied
various types of plastic pipe along with special wet-
wells, valve chambers, lids, and associated nylon-
coated ductile iron pipework, as well as galvanised
stainless steel hardware such as lids and ladders.
Hynds Technical Engineers paid special attention to the
concrete stormwater pipes for this project. Because
these pipes are in constant contact with seawater,
they have been constructed from extra-durable Hydura
concrete, and include additional internal cover over the
reinforcing to ensure longer life.
Hopper Construction’s Manager Guy Jones, says
that there was no hesitation in awarding Hynds
the job saying: “They’ve always been able to
reﬁne and adapt product to our exact needs, so we
knew we could rely on them for this important and
Contractor Dave Hooker, Site Manager; Hopper Construction
Hynds Contact Kevin Carlyle; Contract Sales
Manager, Central Region
Products Polyethylene Pipe, PVC Pipe, Dutile
Iron Valves & Fittings, Concrete Pipe,
Precast Concrete, Galvanised & Stainless
Hardware, Hydura Concrete Product
Thrusting was the most common ducting installation other improvements so that disruption to the local
method, as it could be used where the existing community is minimised.
corridor was too narrow for trenching or where
Fulton Hogan and the same construction partners
it formed a route for gas and water mains. The
are now involved on a second similar OHIP project
trenching and thrusting had to pass next to or
in the Glenn Innes area.
under more than 600 trees that had to be protected
Fulton Hogan Project Manager Trevor Cook says:
“When you see the streets after the job is complete,
the improvement is quite dramatic. Removing
overhead lines and poles makes a street feel less
congested and cluttered.” Client Donald Boltom, Project Manager; Vector
Contractor 1 Trevor Cook, Project Manager; Fulton Hogan
Vector undertakes several OHIPs each year and
Contractor 2 Jonno Webber, Owner; J&R Contracting
regularly partners with city councils to assess
Hynds contact Kevan Wilson, Business Development Manager
what areas would beneﬁt most. The work is often
Products Polyethylene Pipe, PVC Pipe
done as part of an overall paving upgrade or
d r a i n a g e
High hopes for Mercer-Longswamp four-laning
Transit New Zealand aims to improve Transit New Zealand’s Erik van der Wel are daunting. In total, more than two
trafﬁc safety with the realignment of says: “The work is running to schedule million cubic metres of cut material will be
one of the most dangerous stretches of for completion in 2006. Quite apart shifted throughout the project.
State Highway 1 south of Auckland, the from the economic beneﬁts, even more
signiﬁcant is the hope for a reduction in Joe Edwards explains: “Underground
10-kilometre Mercer-Longswamp sector.
accident fatalities. This project could save springs make the hills unstable, so the
It is just one stage of a huge project to up to four lives, annually.” The project ﬁrst step was to sink large manholes with
provide a safer and more efﬁcient road contract was awarded to a joint venture collection pipes that serve to lower the
and rail network between Auckland and between McConnell Dowell and Ross Reid water table. We then identify and ﬁll soft
the Waikato. Motor vehicle numbers are Construction Limited. Project Manager Joe sections along the route that the road will
increasing by a steady 3% a year, but Edwards says: “It is highly complex, but take, pre-loading them with cut material.
talk with us and it’s easy!”
the alarming road toll was behind the After waiting for the ground to settle,
commissioning of this massive project. Some of the earthmoving statistics alone sometimes by as much as two metres,
Part of the extensively excavated site.
Jacking pipe ready for installation.
Hynds Sales Representative, Rob Good and Ross Ferreby from Ross Reid.
d r a i n a g e
we remove the pre-load and start building of specialists. Ross Reid co-ordinates Client Eric van der Wel, Project Engineer; Transit NZ
the road.” anchoring tendons to drill and tie back Engineer John Kerr, Engineers Representative;
Boxam Burnett & Oliver
retaining walls in sensitive hill areas.
“It would be straightforward if we were Hynds contact Rob Good, Sales Representative
Hauraki Piling brings another kind
building the new road parallel to the Contractor Joe Edwards; Project Manager
old one, but the new one constantly of expertise, and then there are the McConnell Dowell & Ross Reid Joint Venture
crosses over it. This requires continuous precasters for the bridge construction. Last Sub Contractor Gerard Twoomey, Owner; Twoomey Construction
but not least is the instrumentation that Products Manhole Systems, Rubber Ring Joint Pipe
diversions, section by section, and with
around 17 000 vehicle movements per day will monitor the sensitive soil conditions.
– that’s general public vehicles – we’re Much of this equipment is housed in
obliged to stay on our toes!” concrete chambers precast by Hynds.
To add to the complexity, the construction “There are some rather technical drainage
conditions necessitate a whole range applications,” says Joe.
Small tanks provide retention relief
In Mount Maunganui, roof water runs impossible. Drainage contractor, Neville
off into soak holes, but when these ﬁll Loveridge, came up with a cost effective
they overﬂow into the stormwater system. solution to this problem by installing small
When high tide coincides with heavy water tanks that would ﬁt into the limited
rains, the system cannot cope. Until the area available for use. “At high-tide the
stormwater lines can be upgraded, all water level was higher than the basement,
new buildings over a certain size are so the tanks hold the water until the
required to have additional storage built tide goes out. We’ve made sure they
into their foundations. Except it’s not have the capacity to cope with periods of
always that easy. heavy rain.”
At Stratos Apartments, a new development Hynds Pipe Systems supplied the ten
in Grace Avenue, the basement sits below plastic tanks & ﬁttings required.
sea level, making the soakage method
Client Alan Rydings, Commercial
Manager; Marlan Developments Cost effective in a tight space... plastic
holding tanks at Stratos Apartments,
Contractor Neville Loveridge; Loveridge Contractors Mount Maunganui.
Hynds contact Daryl Wheatley, Branch Manager, Tauranga
Products Water Tanks
d r a i n a g e
Customised culverts transform
main street site
The vision was for a three-level retail/ofﬁce building into the tops of the units that the construction crew
to grace a previously unusable section fronting were able to lock down in situ.
Whitianga’s main street.
Hynds technical team also assisted in the loading
A dangerous and unsightly tidal drain ran along the and ﬁnal design speciﬁcations for the culverts,
southern boundary of the section, occupying a third which were to form part of the foundations for the
of the site. The proposed building’s foundations proposed three-storey building.
needed to straddle this drain.
Each box culvert under the building was three
One of the challenges for the contractor, Hopper metres wide, 2.3m high and weighed 9.5 tonnes.
Construction, was to de-water the entire site and A total of 18 units were installed. Stage two
support the adjacent buildings while the job was in called for another series of box culverts in a run
progress. Piping the drain with boxed culverts was of nine metres that would support a commercial
identiﬁed as the best solution in that area. service lane at the rear of the proposed building.
These units were 2.9m wide and 2.1m high, but
The consultants for this project, Brian Boult & had a thicker, 250mm wall to provide a standard
Associates, proposed a preliminary design (HN-HO-72) transit bridge loading.
containing sizes and other speciﬁcations. From here
Hopper Construction liaised with Hynds, who in turn Hopper Construction wanted to use a 35-tonne
recommended using Hydura concrete, a product digger to install the box culverts because, at the
designed to withstand the corrosive environment in time, there was no readily available crane based in
which these units were to be installed. Whitianga. To keep the culverts within the capacity
of Hopper’s digger, the length of each unit was
Another requirement was to ensure good bonding reduced from 1.5m to 1.2m, thus reducing their
between the tops of the culverts and the ﬂoor as it weight by 2.4 tonnes.
was poured. Hynds developed a shear key detail
Commenting on the successful completion of the
project, Hopper Construction’s Project Manager
Rob Harris, says: “We really needed the ﬂexibility
afforded by taking the precast approach. Hynds
ensured that potential snags were avoided.”
Engineer Brian Boult, B F Boult & Associates
Hynds contact Roger Pinkerton, Sales Representative
Contractor Rob Harris and Guy Jones, Project Managers;
Products Hydura Concrete, Box Culverts
A 35-tonne digger placing the customised box culverts.
d r a i n a g e
Communication ensures success
Works Infrastructure began work on the second “Further improvement processes were necessary Above
(clockwise from top left):
stage of Waimakariri District Council’s Eastern to raise efﬂuent quality. For this project, two Upgraded UV light system;
Sewerage Upgrade in March 2003. The project sand ﬁlters were added, making a complement Manhole in embankment;
The UV light disinfection system;
involved an upgrade of the sewerage treatment of three, and the UV light disinfection system was Efﬂuent ﬁeld in action;
plant in the growing town of Kaiapoi. upgraded.” Birds eye view of treatment plant;
Beca Limited was commissioned to design the new “The resulting high-quality efﬂuent can now be
system which would replace the original plant, built safely discharged to the river until a proposed
in 1960 to the east of the town off Ferry Road. ocean outfall is available in 2006.”
Waimakariri District Council’s Project Manager “The ocean outfall, one to 2km offshore, is part of
Peter Marks explains what was necessary to the council’s vision for a long-term solution which
achieve a higher-quality wastewater: “The ﬂow includes the broad objective of treating all sewage
to the oxidation ponds was uneven, the result of with upgraded plants at Rangiora, Woodend,
short and long 375mm pipes causing a differential Kaiapoi and Waikuku Beach and connecting the
in the head loss. To correct this, we substituted plants by a network of pipelines across the district
a 600mmØ Hynds pipe for the longer section and to discharge high-quality efﬂuent from the outfall.”
eliminated the effect of the head loss differential.”
“We envisage a permanent improvement in the
“We improved the ﬂow through the 32-hectare quality of our rivers and water systems, which will
wetland area. This involved constructing banks of ﬂourish with ﬁsh and all forms of aquatic life.”
earth bafﬂes to reduce ﬂow short-circuiting. The
Client Waimakiriri District Council
wetland allows the efﬂuent to inﬁltrate into the
Engineer CH2M Beca Limited
ground for 60% of the time. For the rest of the time,
Contractor Dave Neru, Works Infrastructure
high groundwater levels reduce the inﬁltration, so
Hynds contact Maurie Joyce, Sales Representative
the efﬂuent needs to be discharged via Jockey
Products Rubber Ring Jointed Pipes, Manhole Systems
Baker Creek to the Waimakariri River.”
d r a i n a g e
Overnight runway success
When Tauranga Airport needed someone to the ground water. The pumps were Above
Tauranga City Airport runway... as good as new!
complete an unusual stormwater project, positioned at least 60 metres away from
Connell Contracting readily accepted, even the runway, for safety reasons. Below left
A ring joint pipe is eased into trench.
though it meant some of its team would
After that, it was a matter of digging up
have to give up their day jobs! Work on
the tarseal in sections each night,
this job could only be done at night.
installing the piping and removing that
The airport had to remain operational section of wellpoint. Come morning, the
during the day, so construction work could runway was re-sealed, ready for the early
commence only at 8.30pm. The runway’s morning ﬂights.
tarmac seal had to be intact by 5.30am
The airport is a controlled area and timing
each day, ready for trafﬁc.
was crucial. There was no room for error,
Although the project itself was not and Dave Connell’s team made none. In
technically demanding and required the fact, they were rewarded for their efforts
installation of about 2km of stormwater with a Caltex Construction Award.
piping, the ﬁrst task was to install about
160 metres of wellpoint system to remove
Client Ray Dumble, Airport Manager; Tauranga Airport
Engineer Andrew Carmichael, Senior Engineer;
Contractor Dave Connell, Owner; Connell Contracting
Hynds contact Daryl Wheatley, Branch Manager, Tauranga
Products Rubber Ring Joint Pipes
d r a i n a g e
Watch out! Here comes
Hynds is introducing the Boss range of
strong, lightweight plastic pipes to New
Zealand this summer, taking the country
into a new era of pipe technology.
The latest additions to Hynds Pipe Systems’
extensive product catalogue, Boss pipes
are manufactured in New Zealand to suit
our rugged conditions. The rigid, twin-wall,
corrugated pipes are a product of the
latest international technology and raw
Alan Paterson. “Polypropylene, used for Top
material improvements – with a big dash Bosspipe being installed.
of Kiwi ingenuity. the StormBoss and SewerBoss pipes, is
very strong and robust, has high abrasion-
The Boss range comprises: resistance, is resistant to chemicals, and Rubber ring being put onto pipe.
Cutting to length.
• StormBoss – polypropylene pipe for can operate at quite high temperatures
stormwater applications – up to 80 degrees Celsius – which none
of the other plastics can.”
• SewerBoss – polypropylene pipe for
sewer system installations The Boss range is suitable for a wide range interior are coloured black for ultimate UV
of applications, from rural farms to urban protection so FarmBoss won’t go brittle in
• FarmBoss – polyethylene drainage and
subdivisions. It is manufactured in four the sun. Lengths can be transported on
internal diameter sizes: 225mm; 300mm; utility vehicles using roof racks, making
The Boss range of pipes is produced by 375mm; and 450mm. Diameters of up to them a popular option for farmers.
Waters and Farr - the trading name for 600mm are planned for the future.
Bosspipe stiffness ratings will suit all types
Interpipe Holdings Ltd - a joint venture
The StormBoss product is an extruded, of applications with product being stock in
formed in February 2005. The joint venture
high-technology, lightweight, twin-wall SN6, SN8 and SN16.
ensures New Zealand customers have
polypropylene pipe suitable for stormwater
access to the best plastic pipe product
applications. It features a smooth internal
technology available in the world. Hynds
bore (colour-coded grey) and a corrugated
chairman John Hynds, saw the huge
exterior wall capable of withstanding high
number of applications for this type of pipe
loads. Polypropylene is a tough material
throughout New Zealand and set about
with excellent and proven resistance to
forming the joint venture.
impact, chemical attack and abrasion.
“It’s a signiﬁcant move for Hynds,” says
SewerBoss is an extruded, high-technology
John Hynds. “Concrete has been the
twin-wall polypropylene suitable for
traditional material used to make pipes,
wastewater applications. Like StormBoss,
but now we’re seeing an overseas trend
it too has a smooth internal bore (colour-
to move to polypropylene pipes, which are
coded terracotta) and a corrugated
considerably lighter than concrete pipe.
exterior wall for maximum performance
“The installer can lay a six-metre length of characteristics. Its interior is colour-coded
Boss pipe using smaller diggers reducing terracotta.
the need for high capital cost equipment
FarmBoss is a drainage and culvert
Waters and Farr, a polyethylene pipe-
pipe manufactured from high-density
maker since 1954, manufactures the
polyethylene, an extremely tough material
Bosspipe range at its Wanganui factory.
with excellent and proven resistance to
“The big thing about the Bosspipe is that impact and abrasion. FarmBoss pipes have
they are lightweight but very strong,” a smooth, internal bore and a corrugated
says Waters and Farr general manager exterior wall. Both the exterior and
18 r a l
After searching extensively for a property which
would enable them to pursue their interests in
wildlife and conservation, Murray and Lois Tapp
ﬁnally found a suitable site on Taraunui Road, Parua
Bay, 23km from Whangarei. Using their family The Tapps were particularly pleased with the
trust, Tamal Trust, they purchased 44.5ha of ex- risers and their potential for varied use in wetland
dairying land and are now in the process of projects. “The waterfowl habitat and landscape
turning it into a stunning example of reinstated values of a wetland could be greatly enhanced by
freshwater wetlands. the imaginative placement of different size risers
and suitable plant material. They could be planted
Three wetlands totalling approximately 6ha have
in such a way that eventually the riser would not
been developed on the site which is close to the
Whangarei District Council Pataua River Site of
Ecological Signiﬁcance. Two upper wetlands run Other applications suggested by the Tapps include
parallel to each other and are separated by a using the risers as ‘islands’ in smaller or urban
peninsula, which is mainly grassland with a small landscaped wetlands where the construction of
area of native bush. Both have a dam ﬁll about 3m an earth island would limit the area of open
high. The water is directed from these into the third water. Risers also allow for the containment and
wetland which ﬂows into the Taraunui Stream. All management of plant material and enable plants to
three are interspersed with islands and associated be introduced into wetlands that would otherwise
plantings, and landscaped to blend together as be too deep for planting.
much as possible.
In addition to the risers, a 150mm base pipe and
Large diameter risers supplied by Hynds Pipe gate valve with a 300mm overﬂow pipe in a drop
The Kaihikatea wetland prior to reaching
Systems were put to innovative use as ‘wind lap’ box was used to allow water level control for
full water level. buffers. The off-cuts were placed so that the top of maintenance of the Tamal Wetlands. This system
This page each riser is 100-150mm above water level, then was used in the two upper wetland areas. In the
Below backﬁlled with earth. This prevents the ‘wind lap’ lower wetland, a 150mm base pipe and gate
The marginal farmland before construction
of the Kauri wetland, left, and after the (small waves) from eroding into the earth ﬁll that valve enable the water levels to be lowered as
wetland was formed, right. forms the island. necessary.
r u r a l
Because Murray and Lois live on the property,
they were particularly concerned about pollutants
from household waste water ﬁltering through to
the wetlands. Installing a Hynds LifeStyle aerated
wastewater management system provided an
environmentally-sensitive solution. The system
treats wastewater to a level that provides a clean,
odourless liquid suitable for sustainable irrigation of
the surrounding environment.
“Challenges are an every day occurrence when
developing a private wetland and conservation
project such as ours. ”
The value of the right technical advice, good “We take every available opportunity to make Left
Murray Tapp adjusts the water ﬂow
design, planning and the right products delivered landowners, surveyors, real estate agents and through the base pipe gate valve.
on time became apparent during construction. councils aware of the value of natural wetlands
For instance, a tropical storm dumped 113mm of when considering subdivision and land use. We Drop box overﬂow prior to the wetland
rain in 12 hours over the wetland catchment area believe that conservation and sensible development reaching operating level.
- with the systems already in place the Tapps were can complement one another.”
able to manage the rising water levels and the site
Client Murray & Lois Tapp, Tamal Trust
Contractor John Lethwick Limited
Murray and Lois hope in time to make the Tamal
Hynds contact Neville Tapp, Operations Manager
Wetlands project available for educational purposes.
Products Manhole Systems, LifeStyle Wastewater
It has already created considerable interest. Treatment System, Fittings
About the Author
Americo Dos Santos
BSc Eng (Civil), CEng (UK), MICE, MIStructE,
Technical Services Manager
Introduction Common Aggressive
Americo Dos Santos joined Hynds Pipe Systems Conditions
Limited in 2000 and has been Technical Speciﬁers and Asset Managers are
Services Manager since 2001. becoming more aware of the need to Common aggressive conditions which
specify more durable concrete for use in affect the durability of concrete are:
aggressive conditions such as sewers,
‘Dos’, as he is widely known, has more than Marine Environment
marine environments and other areas
26 years’ experience in the design and
manufacture of precast and prestressed where concrete may be subjected to Durability of an element or structure is
concrete components and structures as well chloride induced corrosion or acid attack. affected by corrosion of embedded steel
as reinforced concrete pipe. reinforcement as a result of chloride ion
Often the term 100 year “design life” is
penetration through the concrete. This
His advanced knowledge of concrete technology referred to in relation to durability of the
process is known as chloride induced
associated with the manufacture of precast concrete product or structure.
concrete products, including the development
“Design life” can be interpreted as the
and promotion of durable concrete in various Acid Attack in Sewers
exposure conditions, is highly valued not only point in time where:
within the Hynds organisation but at industry Hydrogen sulphide gas (H2S) is often
• The threshold for initiation of corrosion
level too. generated in sewers particularly those
having a low gradient, low volume and a
Dos is the Hynds representative on Standards
• “First maintenance” is required; or high BOD value. In poorly ventilated sewers,
New Zealand/Standards Australia Committee
• End of functional service life has bacterial action in the moist environment,
WS-006, which is updating and amalgamating
NZS3101 and AS4058, and updating AS3725, occurred. oxidises the hydrogen sulphide gas (H2S)
and is the company’s technical representative to form sulphuric acid (H2SO4).
with the Concrete Pipe Association of Other Acid Attack
Australasia, which develops and promotes
the design and manufacture of high-quality Dairying, fruit processing, certain vegetable
reinforced concrete pipe. processing, wine manufacturing, ﬁsh and
meat processing, wool scouring and other
industries all produce various forms of
acids and /or sugars in solution which will
Hydura manhole lids. Sulphate Attack
Right Certain soils, geothermal sites and some
Hydura pipe... extended life in corrosive sewage will also lead to concrete durability
Hydura Concrete Chloride Induced Corrosion
Hydura concrete was developed by In this instance the term ”design life” is NZS 3101 the Concrete Structures Standard
Hynds in 1997 specially for our sewer subject to some interpretation because prescribes minimum requirements that
and precast concrete product range. the process of chloride induced corrosion deem to meet durability requirements of 50
Hydura uses a ternary or triple blend is two fold: years under a wide range of environmental
of cementitious materials, comprising conditions. These are based on Exposure
• Ingress of chloride ions from the
Duracem® (containing 75% ground Classiﬁcations (table 5.1, NZS3101) and
granulated blastfurnace slag (ggbs)), GP surface of the concrete until a certain
Minimum Required Cover (table 5.5,
cement and Microsilica 600. threshold (below which no corrosion
occurs) is achieved. A commonly
General Purpose Portland cement (Type accepted value is 0.4% by weight of Holcim have developed the BRANZ
GP), blended with ground granulated cement. The transport mechanisms approved “Chloride Ingress Model” which
blastfurnace slag (ggbs), a “natural”
for this phase are penetration of models the passage of chloride ions into
cement, provides superior protection and
water (containing the chlorides) and the cover regions of reinforced concrete
durability to concrete subject to chloride
diffusion. exposed to salt laden environments and
induced corrosion of reinforcement or
predicts period of exposure to reach the
moderate (pH≥4.5) acid attack. Use of slag • Initiation of corrosion.
threshold at which corrosion of the steel
cement is historically known to provide
As a result “design life” is usually may commence.
superior protection to deterioration due to
interpreted as the point in time:
acid attack e.g. Brussels, Belgium 1890’s, Typical exposure periods for varying depths
sewerage and underground railway tunnels • To reach the threshold for initiation of of cover for precast Hydura concrete are
made extensive use of concrete containing corrosion to occur; or detailed in Tables 1 and 2 (below) for Class
high volumes of ggbs. B2 and Class C exposures respectively.
• When “ﬁrst maintenance” is required.
The durability of Hydura concrete arises For a typical 50MPa concrete the CIM
There is no internationally recognised
from the low levels of calcium hydroxide Model predicts cover requirements for
process of assuring a given prescribed
Ca(OH)2 in the slag concrete. Most of Hydura concrete of 20mm and 35mm
the remaining calcium hydroxide Ca(OH)2 “solution” which will meet a particular
for B2 and C exposure respectively, for
reacts with the Microsilica 600 to produce service life. Chloride induced corrosion exposure periods in excess of 100 years to
additional calcium silicate hydrate. The is not a “precise science”. The principles the initiation of corrosion.
resultant reﬁned pore structure of the however, are well understood and there
By contrast, NZS3101 requires 35mm
concrete is more dense, less porous and are many researchers around the world
and 70mm cover for B2 and C exposure
hence less vulnerable to leaching and publishing technical papers and developing
respectively, for structures and members
attack by acids and sulphates etc. computer models of chloride ingress
with a speciﬁed intended life of 50 years
through concrete. (based on Ordinary Portland Cement).
Hydura concrete was developed by Hynds
Pipe Systems Limited engineers in 1997.
Precast concrete elements (pipes, box
culverts and the like) have been in use in
New Zealand since then.
Table 1 Table 2
Chloride Ingress Model Chloride Ingress Model
Minimum Cover Requirements For Precast Concrete Components Minimum Cover Requirements For Precast Concrete Components
(Exposure Classiﬁcation B2) (Exposure Classiﬁcation C)
Hydura Concrete Cover to Reinforcement Period of Exposure to Hydura Concrete Cover to Reinforcement Period of Exposure to
Grade (MPa) threshold of corrosion (years) Grade (MPa) threshold of corrosion (years)
35 30 >100 40 40 >50
35 >200 45 >100
40 25 >100 50 >150
30 >200 45 35 >50
45 20 >50
50 35 >100
50 20 >100 40 >200
25 >200 55 35 >200
Durability of Hydura Concrete
Acid and Sulphate Attack
Acid attack on concrete is usually conﬁned specimens compared to standard concrete
to the cement paste. Acids typically mixes (using GP cement only) and mixes
dissolve the calcium hydroxide and other with 5 and 8% silica fume.
products of hydration, leading to a loss
The report “Sulphide Corrosion of Concrete
of bond between the coarse aggregate Sulphide Corrosion of Concrete Sewer Pipes: Test
Sewer Pipes – Test Series Two – Final Series Two, Final Report, July 2001, Auckland
particles. Spalling or removal of the
Report” dated July 2001 provides full UniServices Limited.
aggregate from the concrete then exposes
details of the test results.
the reinforcement to corrosion leading to Engineered Concrete Solutions, Holcim Concrete.
additional expansive stresses. Concrete pipe manufactured using Hydura Product Data – Duracem, April 1996, Holcim (New
concrete will have a design life in excess Zealand) Limited.
Sulphates react expansively with the
of 100 years, provided that certain service
hydration products tri-calcium aluminate Chloride Ingress Model CIM.XLS Version 2.2, November
conditions are met. These are normal 2002, Holcim (New Zealand) Limited.
and calcium hydroxide leading to stresses
domestic sewage without aggressive
in the concrete and exposure of the NZS3101:1995 Concrete Structures Standard Part 1
industrial or commercial contaminants, – The Design of Concrete Structures.
reinforcement to corrosion.
pH≥4.5, correct installation without
Lower levels of calcium hydroxide Ca(OH)2 overloading and adequate ventilation to
in slag cement are further reduced by prevent build-up of H2S gas. Hydura Box Culvert, durable and easy to specify.
the reaction of the remaining calcium
hydroxide Ca(OH)2 with the Microsilica
600, producing additional calcium silicate
hydrate. The resultant reﬁned pore structure
of the concrete is more dense, less porous
and hence less vulnerable to leaching and
attack by acids and sulphates, etc.
The use of Hydura concrete produces
signiﬁcant durability enhancement beneﬁts
in sewer pipes. The combination of high
cover/bar ratio and Hydura concrete,
results in a more durable concrete pipe
even with low concrete cover to the wire
The CPAA (Concrete Pipe Association of
Australasia) commissioned a study in 1999
by Auckland UniServices (Department of
Civil and Resource Engineering) into the
durability of various concrete types used in
The project investigated the behaviour
of hydrogen sulphide induced corrosion
through simulation using an acid immersion
test. The test procedure immersed various
specimens in a 1% sulphuric acid solution
for 500 days and measured the weight loss
at various stages.
The results of the study conﬁrmed
improved durability of the Hydura concrete
Mike Strickett, Hynds Environmental
Hynds Environmental South Island Manager.
Commits to Mainland Above left
Hynds Environmental LifeStyle Wastewater
Treatment System being installed.
Hynds Environmental recently opened a perspective working in the UK, Belize, “The water discharged to the land from
branch in Hornby, Christchurch, in response Papua New Guinea and Malaysia,” says our Lifestyle Wastewater System has
to the growing demand for the company’s Mike. “I am impressed by the close been designed to meet New Zealand
environmental protection expertise and relationships Hynds Environmental has standards for wastewater disposal, which
products in the South Island. formed with global companies because is beneﬁcial to our habitat. And, similarly,
this worldwide support structure enables our pristine South Island streams and
General Manager Peter Carroll says
us as a company to keep up to date with rivers need protection from the stormwater
the new branch has both a sales and
the advances being made in our ﬁeld. that can rage down from our roadways and
operational focus and aims to work closely
with councils, contractors and consultants “One chief beneﬁt is the constant stream
to provide engineered solutions to local of new products in which our South Island “I believe Hynds Environmental has a
environmental issues. customers are expressing keen interest. key role to play in helping to protect and
Having a strong afﬁnity with the mainland, I sustain our environment into the future.”
“Ability and continual innovation are the am delighted to come on board and play my
Born and bred in the Waikato, Mike loves
key factors,” says Peter. “Our skilled part in tackling its environmental issues.”
the geological difference of the South
engineering team has a strong reputation
The new branch achieved its ﬁrst major Island where he used to climb and today
for delivering solutions that are proven and
success when it was awarded the contract loves to tramp.
to build a large commercial wastewater
“The Hynds presence, already established
“Our large and diverse range of existing plant at the new Youth Justice Centre in
by other divisions of the company
products offers solutions for most South Canterbury.
elsewhere in the mainland, can rely on
environmental applications. Alternatively,
The system will utilise the latest membrane strong support from the environmental
new products can be designed or imported
bio-reactor (MBR) technology. Daily team in Auckland. That should give our
as a site determines.”
ﬂows are expected to be 13,000 litres customers the conﬁdence it gives me.”
Adding to these skills is the new South a day. Fletcher Construction is the main
Island Manager, Mike Strickett, whose contractor and the centre is scheduled to
experience in the construction and civil open mid-2005.
engineering industry includes years with
”Treatment of wastewater is vital to the
Beca Carter, Beca Gure, John Laing and, protection of the aquifer, the great source
more recently, W. Stevenson & Sons. of the Canterbury ‘champagne’ – drinking Hynds Env. Mike Strickett
“One gains a valuable international water that needs no chlorine,” says Mike.
24 New products for
Net-Tech Gross Pollutant Interceptor
The Net-Tech Gross Pollutant Interceptor is the At this point it is choked off and held by a short
latest in Hynds stormwater protection products. tether until removed by truck or boat-mounted
This simple but effective device captures 90% of crane, whether or not the net has been released.
stormwater-borne gross pollutants in river, canal,
creek, and beach situations. Standard systems are available for multiple outlets
with a variety of shapes, including box culverts and
This Gross Pollutant Interceptor can be ﬁtted to open channels. Each system can be designed to
the headwall or outfall pipe with little or no site accommodate various ﬂow rates and volumes.
development or civil engineering. Once the net
component is full of pollutants, it detaches clear of
Net-Tech GPI prevents pollutants entering beaches the outlet and travels downstream about a metre.
JEMFlo Water Saving Devices
Hynds Environmental has just introduced JEMFlo to signiﬁcantly decreases hot water consumption,
New Zealand – a unique and highly effective water less energy is required to heat the hot water. The
ﬂow control system for installation in all types and result is signiﬁcant savings in water consumption
brands of ﬁxture taps used in any hot and cold – typically 25% to 35% but exceeding 50% in
water supply system. JEMFlo consists of a series some cases.
of ﬁxed oriﬁce, intra-faucet ﬂow controllers that
can be installed into any tap seat. Made from one solid piece, JEMFlo has no moving
parts and therefore requires no maintenance. The
The JEMFlo system eliminates temperature and system is guaranteed for 10 years and all materials
water ﬂow ﬂuctuation by achieving a balanced, and surface treatments are safe for use in potable
controlled and constant ﬂow of water, no matter water supplies.
how many taps are turned on or off. As JEMFlo
JEMFlo saves water, energy
Bandalong Floating Litter Traps and Boom Systems
The Bandalong Litter Trap is a ﬂoating device Installed across waterways, the Bandalong Boom
installed at strategic locations along rivers, streams, System acts as a ﬁnal barrier to collect or deﬂect
channels and open bodies of water. Outspread debris. The ﬂoating boom sections are coupled
collection booms direct ﬂoating litter, vegetation together and spanned across a weir, waterway or
and other debris through a one-way mesh gate dam to capture litter and prevent it from ﬂoating
into the trap where it is contained ready for further downstream.
removal. Re-entrainment is prevented by a system
of counterweights and paddles that close the entry Installation of either Bandalong system can be
gate when the water ﬂow ceases or there is a completed within a day with most components
change in ﬂow direction due to tide or wind. pre-assembled offsite. Substantial earthworks,
The Bandalong litter trap for open waterways.
construction and reinstatement works are not
required therefore disruption to services is
Hynds Environmental 25
Hynds Environmental is now a distributor for Enviropod
Catchpit Filters throughout New Zealand.
The Enviropod ﬁlter efﬁciently removes gross pollutants and
suspended solids from stormwater. Easily installed into new
or existing catchpits, Enviropod requires no construction,
allowing it to be affordably retroﬁtted or applied to any
The ConstructionPod is a removable, adjustable catchpit
insert, designed to be placed downstream of minor works or
as secondary treatment during major works in conjunction
with traditional treatment such as a silt fence or pond.
Geotextile or nylon micron-rated ﬁlterbags effectively
remove ﬁne sediments, ﬂakey paint and other construction The Enviropod is easily installed in new or existing catchpits.
Enviro-Valve First Flush Diversion
The Resource Management Act 1991 stipulates that
stormwater must be separated from any contaminated
runoff to prevent it from being discharged into the sewer
network. Enviro-Valve is ideal for all ﬁrst ﬂush diversion
requirements including car/truck wash areas, industrial
wash down facilities and supermarket refuse areas.
Hynds Environmental has also just introduced an advanced
Enviro-Valve system speciﬁcally designed for areas of heavy
trafﬁc ﬂow. It incorporates a grit trap that captures larger
particles such as stones and sand, effectively ensuring
that no contamination of the stormwater and sewer
The Hynds Enviro-Valve replaces the need for
rooﬁng over wash down areas.
Hynds Downspout Filter
The Hynds Downspout Filter assembly is typically The unit is made of corrosion-resistant stainless
installed on commercial or industrial downspout steel (Type 304) and can be customized on request.
pipes to capture non-soluble pollutants such as The ﬁlter has a tamper and waterproof hinged
sediment, gravel and hydrocarbons normally found access door with a slide-in pollution collection
on building roofs. basket for low-cost, easy maintenance.
Further information on Contact: Craig Pearson at Hynds Environmental
any of these products Ph: 09 571 0090
In 1963 on the site of an old timber mill at the head
of the Piha Valley, the Boys Brigade established a
youth camp which they have owned and operated
ever since. Known as Steadfast Park, it has hosted
more than 200,000 young people from a variety of
community and Boys Brigade groups.
The original wastewater system had remained
since the early sixties and consisted of a series of
basic septic tanks. The tanks discharged directly
to soakage trenches which over time had become
saturated and a threat to the local environment.
High groundwater levels around the site meant
there was a danger of efﬂuent being discharged
directly into the nearby Piha and Glen Esk Streams
which ﬂow to Piha Beach.
A new, high performance environmentally-friendly
wastewater treatment system was designed and
installed to treat the expected peak ﬂows of 15,000
litres per day from the site.
The new system allows sewage at Steadfast Park
to be treated using a four-stage aerobic system
that includes advanced biological ﬁlters and a
unique surge protection system. The result is a
clear, odourless efﬂuent that is used to irrigate the
surrounding garden, bush and trees. The discharge
from the site is being pumped out along three
kilometres of drip lines and irrigates the local
Because site access was difﬁcult, all components
during installation had to be either manufactured
on-site or designed for easy transportation to site.
In addition, engineers had to design the system
to cope with high ﬂood planes. Utilising carefully
raised landscaping and specially elevated housing
units for the advanced electronic componentry, the
wastewater system is now well protected against
the extreme local weather conditions.
Lion Rock at Auckland’s Piha Beach is a
The modular system design enables treatment regional landmark.
capacity to be easily increased if the efﬂuent ﬂow Above centre
Client Boys Brigade
into the system increases at a later date. The commercial system at Piha has been
designed for very high ﬂoodwaters. Engineer John White
Hynds Env. John Bradford & Niki Johnstone
Hynds SAF Commercial Wastewater
systems are modular to allow for easy Brochure EV36 Hynds SAF
reference Commercial Wastewater System
Treatment train proves best solution
Treatment train proves best solution pipe invert,” says Hynds Environmental money. Civil Construction, which has had
Stormwater runoff has become a major Engineering Manager Niki Johnstone. signiﬁcant experience with these units,
source of pollutants entering New Zealand’s was contracted to install the system.
Typical sand ﬁlters require a large amount
waterways and coastal areas causing Installation was completed in less than
of space to incorporate a sedimentation
damage to the environment. As part of its eight hours.
zone plus the sand ﬁlter area. To keep the
commitment to stormwater management,
site area required to a minimum, Hynds “Hynds Environmental and Civil
Waitakere City Council, through its
Environmental engineers designed a unique Construction worked closely on this project
business unit EcoWater Solutions, has
treatment train utilising Downstream to come up with the best solution for the
initiated a number of projects designed
Defender to remove sediments, followed site. The ﬁnal solution was innovative
to remove pollutants. These include oils,
by the sand ﬁlter where the treated and made the on-site installation easy
heavy metals and gross pollutants from the
stormwater receives ﬁnal polishing. and cost effective,” says John Sellick of
stormwater runoff entering local streams.
Civil Construction. “Hynds Environmental’s
EcoWater Solutions manages Waitakere’s Even with this redesign, the project was
ﬂexibility, professionalism and extensive
assets and services that relate to the ‘three still signiﬁcant with the sand ﬁlter alone
product knowledge were a key factor in the
waters’ – water supply, wastewater and being 10m long, 3.5m wide and 4.5m
successful completion of this contract.”
One of these projects was the installation The sand ﬁlters, designed to Auckland
of treatment systems for a large catchment Regional Council requirements as speciﬁed The massive Hynds Environmental treatment
system being installed at Henderson.
area on Henderson’s Sel Peacock Drive and in its Technical Paper 10 (TP10), are
in September 2003, Hynds Environmental intended to remove more than 75 per cent
Systems Ltd was approached by of the suspended solids to which a majority
consultants Coulibaly & Associates to of the heavy metal and hydrocarbon Client Waitakere City Council
design a suitable treatment solution to pollutants are attached. They are made Engineer Coulibaly & Associates
treat the 1.1ha (11,000m2) site. from precast units and are designed for Contractor Civil Construction
simple and fast on-site installation. Hynds Env. Niki Johnstone
“The Sel Peacock Sand Filter was a contact
challenging design because of the Much of the work on the unit was completed Brochure EV05 Sand Filter System and
reference EV06 Downstream Defender
site’s access restrictions and depth to off-site, saving Waitakere Council time and
Large Commercial Wastewater System
installed at Mangawhai Heads
One of the largest commercial wastewater
systems designed in-house by Hynds
Environmental engineers is forming
a temporary sewage treatment and
disposal for 85 new residential sections
at Mangawhai Heads, north-east of
The system will provide tertiary treatment of
60,000 litres a day, reducing faecal coliform
levels to less than 200 per 100ml.
Consulting Engineer Hamish Peters, of
Cook and Costello, says they stipulated the
tertiary rating, which uses ultraviolet light
in the treatment process, in order to render
the wastewater another degree safer for
the irrigation of trees on land adjacent to
the primary tank and the two aeration tanks Above
the residences. The design of the hynds SAF commercial
are 5.2m wide; the ﬁrst chamber is three wastewater system at Mangawhai Heads allows
Hynds Engineering Manager, Niki metres wide and the second, 2.5m wide. the entire system to be relocated in future.
Johnstone, says the design also
incorporated for the ﬁrst time a new Contracting company Ross Tanks is
clariﬁer, which removes the ﬁne sediment. optimistic the tanks can be uplifted and re-
“This allows the irrigation to proceed at a used in another subdivision once their job Client Metcalf Developments
trickle rather than as the usual drip, the is done for the 350 residents at the corner Engineer Cook Costello
soil having good drainage properties.” of Molesworth and Estuary Drives. Contractor Hynds Environmental
Hynds Env. Niki Johnstone
The large scale of the project necessitated The temporary wastewater system will be contact
onsite construction. There are four tanks and removed when the town’s main sewerage Brochure EV36 Hynds SAF Commercial
reference Wastewater System
two chambers: the ﬁrst is six metres wide, system is brought on stream in 2006.
Protection for Stormwater Ponds?
Hynds CleansAll® is the Solution
When the stormwater upgrade project at The ﬁnish had to be visually unobtrusive.
Fletcher Wood Panel’s Kumeu site required
To treat the stormwater runoff, Hynds
an environmental treatment system,
Environmental engineers speciﬁed a 600
consulting engineers Pattle Delamore
Series Hynds CleansAll® Gross Pollutant
Partners Ltd (PDP) approached Hynds
Trap (GPT). PDP consultant Gerald Strayton
Environmental for assistance.
said: “The conﬁguration of the Hynds
The upgrade already included a stormwater CleansAll® allows for a basket to catch
treatment pond, but it was necessary to
the chip. The tight gradients imposed on
remove a signiﬁcant amount of large-log
the design meant that head loss across the
debris, including bark and wood chip,
device was also an issue. The CleansAll®
before the stormwater entered the pond. Above
met all the design constraints.”
This had to be completed with little head
Hynds CleansAll® effectively removes gross pollutants
loss, while allowing for easy maintenance. The Hynds CleansAll® will capture 100 and sediments from stormwater.
An Innovation in Rapid Flood Protection
In a rapid ﬂood situation, time is your tested by independent institutions and
enemy as much as the rising water. is recommended in the Emergency
Building a sandbag dyke even when all the Preparedness Report of Canada.
materials and labour are on hand would
“We think it will also prove to be a winner in
take too long; the damage is likely to be
New Zealand, especially where residential
done before you can get started.
areas need protection, or additional height
In many cases, the answer would be needs to be added to existing levees, and
the NOAQ patented ﬂood-ﬁghting system. essential roads kept open to trafﬁc.”
The concept is beautifully simple and Quick and simple deployment makes NOAQ Tube
The NOAQ Tube Wall is light, weighing
comprises inﬂatable plastic tubes that are Wall a highly effective ﬂood protection system.
only 0.4 per cent of the weight of a
interconnected to create a temporary ‘tube
corresponding sandbag dyke. The low The NOAQ Tube Wall is not only extremely
weight makes for fast installation. Two quick to deploy, it is also stable – even
Instead of using the weight of sand in people can erect 60 metres in one hour, when damming water to the brim. Its
bags to withstand the water pressure, the and dismantle it at the same rate. ﬂexibility means it can be conﬁgured any
NOAQ Tube Wall uses the weight of the which way needed. It is easy to ship
“When you arrive at the site,” says Peter,
ﬂoodwaters. Each tube has a skirt fused to and does not require a heavy, ground-
“just roll the tubes out, inﬂate them
the side facing the water. As the ﬂoodwater damaging vehicle. And it works just as
with the handheld blower and do up the
rises, it presses the skirt against the ground well on concrete and asphalt as it does on
zips. Simple! You don’t have to check
and the friction anchors the inﬂated tube lawns and meadows.
beforehand whether the ground is even
with no need for heavy weights.
enough, and the toughened PVC tubing is, You also don’t have the cost of removing
Hynds Environmental General Manager of course, re-usable.” the sand afterwards, and what’s more, the
Peter Carroll says the product is literally air and the water that make this ingenious
a winner. Some NOAQ Tube Wall speciﬁcations: device work, are free and on hand. Noah
“The Tube Wall was designed by Sigurd couldn’t have come up with a better idea
Wall Height: 50, 70, 100 cm
Nelin of Sweden, where it won the if he’d tried!
Wall Width: 2.4 m approx.
SKAPA prize. This is awarded annually Wall Length: No limitations
for the best Swedish invention. Developed Hynds Env. Craig Pearson
Tube Length: 7 – 20 m contact
with support from the Swedish Rescue Tube Weight: 35 – 100 kg Brochure EV31 NOAQ Tube Wall
Services Agency, it has been thoroughly reference
per cent of all gross pollutants 3mm “The Fletcher Wood Panel’s CleansAll® Site Drainage. “Within a day and a half, the
and above, up to the design ﬂow rate. unit is an example of this and we are proud system was ﬁtted and ready to operate.
The Hynds CleansAll® also captures free to have been able to offer a unit that forms Fletcher Wood Panels are very pleased
oils and greases and a large proportion such a vital part of the treatment chain at with the performance of their CleansAll®
of sediments. The stainless steel basket this site.” unit and the system has been trouble-free
allows for quick and easy maintenance from installation to date.”
On Site Drainage was contracted to
and its unique design prevents re- undertake this upgrade and worked closely
entrainment of captured pollutants. These with Hynds Environmental to design the
characteristics made it ideal for the Kumeu unit in precast components to ensure easy,
application. kitset installation. The units were designed
“Hynds Environmental prides itself on to allow for interconnection through cast in Client Fletcher Wood Panels
providing engineered, environmental Drossbach ducts and threaded rods to give Engineer Pattle Delamore Partners Limited
the completed unit structural integrity. Contractor OnSite Drainage
solutions, custom designed to suit site-
Hynds Env. Niki Johnstone
specific requirements,” says Hynds “I am impressed with the ease with which contact
Environmental Engineering Manager Niki the Hynds CleansAll® Gross Pollutant Trap Brochure EV08 CleansAll Gross Pollutant Trap
Johnstone. is installed,” reports Paul Bray-Taylor, of On
On the spill response trail
With Excell Corporation and Manukau Water
New Zealand companies are working smarter to principle of ‘reasonable care’ or ‘due diligence’,
prevent wastewater spills or minimise their effects. which means an organisation must have taken
With breaches of the Hazardous Substances and reasonable action to prevent or minimise the risk
New Organisms HSNO Act carrying individual ﬁnes of the spill.
of up to $500,000 with a further $50,000 a day
Hynds Environmental offers a complete range of
that the offence continues, there is added incentive
spill-management systems that assist organisations
to be proactive.
to protect the environment and achieve best
Manukau Water, working closely with Excell management practices, whether in the workshop,
Corporation, has focused on the problem of transport, service station, marine or chemical
surcharging sewer lines as part of its strategy to environments.
manage its wastewater networks efﬁciently and
Specialised kits can also be custom-made
achieve HSNO compliance.
to suit speciﬁc requirements and are
“The solution was an Environmental Response available upon request. As well
Trailer,” says Project Manager, Brent Pitkethley. as being among the most
Brent Pitkethley of Excell Corporation; The trailer carries everything necessary to respond effective on the market,
Craig Pearson from Hynds
Environmental; Tim Gibson also of
promptly to sewage overﬂows and other spill many of these Hynds
Excell Corporation and; Simon Porter emergencies. A joint project between Excell products are biodegradable
from Manukau Water.
Corporation and Manukau Water, the trailer is and manufactured from
Above sponsored by Hynds Environmental and is stocked recycled or renewable
Hynds Environmental spill products in
action. with its full range of effective and environmentally resources.
friendly spill-response products. This includes
Products included in the Environmental pumps, sandbags, Hynds containment booms,
Response Trailer. pollution signs to make the public aware of a sewer
overﬂow – there is even a Hynds Spill Response Kit
for small oil or diesel spills.
“Hynds Environmental appreciates the opportunity
to associate with this proactive initiative,” says
Sales Manager, Craig Pearson. “The Hynds
Environmental Spill Management products will
ensure that Excell Corporation is suitably equipped
to protect our environment.”
It should be noted that successful defence against
prosecution under the legislation relies on the legal
Client Excell Corporation Limited & Manakau Water
Hynds Env. Craig Pearson
Brochure EV22 Hynds Spill Response Kits
All absorbents are not made equal
How do you know if the absorbent material in your spill response system is the right one?
Ask yourself the following questions:
Does my sorbent absorb lots of oil? In other
words, does it give me value for money?
Check on the listed absorbent capacity of
your sorbent. This will often be given in
Will my sorbent release the oil it has
absorbed later on?
Once your absorbent has been used,
most assume that the oil stays locked in
Is my sorbent made from recycled or
treated waste materials?
We now recognise the need to use
recycled materials wherever possible and
weight of sorbent per weight of oil, but the material. This is not always the case, practical, and to avoid using materials
can be given on a volume basis as well. as some absorbents can release the oil that are made from virgin or non-
A sorbent may be very cheap, but if it has later on. This may not be an immediate renewable resources. There are a large
poor absorbent capacity, you will need to problem to the worker using the number of absorbents on the market in
use so much of the sorbent to do the job absorbent, but it can be a problem when New Zealand, but only a relatively select
that it becomes quite expensive. Also, be the used absorbents are later released few are actually manufactured from
careful with ‘ﬂuffy’ sorbents as they have into the environment, either into a landﬁll recycled or treated waste materials.
very high absorbent capacity on a weight or straight into the natural environment
Enretech Premium Floor Sweep is
basis, but very low on a volume basis. A (ie: at the site of a road spill).
manufactured from recycled natural
good sorbent should be able to absorb at
The easiest way to check if your absorbent cellulose products.
least its own weight in oils or fuels.
leaches is to rub the used material in
It was not long ago that spill response
Enretech Premium Floor Sweep, your hands. If your hands become oily,
systems were seen as a necessary
marketed by Hynds Environmental, is the sorbent is releasing the oil. Ask your
expense, but nobody really cared or
simply the best absorbent on the market supplier for leachate tests conducted on
checked. These days are gone. The
and can absorb up to ten times more the used absorbent, to be sure.
beneﬁts to your business of a sound
liquid than comparable products.
Enretech Premium Floor Sweep has low spill response system, tied into overall
environmental toxicity and passes all OHS&E programs, are well documented.
After cleaning up the spill, how do I leachate tests. Managing your environmental risks is no
legally dispose of the used material? different to managing your ﬁnancial risks.
Used oils and fuels may contain Is my sorbent safe for my personnel to It’s simply good business.
ingredients that are hazardous to use?
the environment therefore
disposal to landﬁll
must comply with
Some absorbent materials in use today
contain low levels of compounds that
could increase the risk of illness to
the worker using the product. These
Reference: Murphy, P.(2004, February) The HSNO
Act-are you ready? DEMM Magazine, p.14
Enretech Premium compounds include crystalline silica (in
Floor Sweep is some inorganic sorbents) and pesticide
biodegradable and residues (in some organic absorbents).
Manufactured from the cotton plant,
Enretech Premium Floor Sweep is safe to
such as incineration
store and quick, safe and easy to use.
and degradation via
Fresher ﬂows into Manukau Harbour
A project to clean up the stormwater two at Great South Road. These units are
ﬂowing into Auckland’s Manukau Harbour characterised by their round collection pits
is yielding impressive results. with stainless steel baskets, which capture
the pollutants and are easily lifted out for
Part of the Auckland Regional Council and
emptying during maintenance. The units
Manukau City Council’s commitment to
also have a sediment sump that captures
reduce the amount of pollutants released
ﬁner particles. An overﬂow diversion weir
into the local marine environment, the
is installed to eliminate ﬂooding during
project’s objective was to improve the
heavy storm events.
quality of stormwater discharged into the
harbour through Ann’s Creek. After the project was completed an ISO
accredited laboratory carried out a particle
The Ann’s Creek Stormwater Upgrade project
size distribution test on dry sediments,
required removal of at least 90% of the litter,
measuring the volumes of both gross
50% of the sediment and 50% of the free oil
pollutants and sediment.
and grease from stormwater ﬂows.
The results show that in the 12-month
In 2002 Hynds Environmental provided
period, the three Hynds CleansAll® Gross
systems capable of meeting these tough of debris from entering the pipes and
Pollutant Traps installed had captured
requirements along with a 12-month reaching the treatment baskets.
more than 10m3 of gross pollutants and
programme of maintenance and systems
approximately 750kg (1280 litres) of dry Hydrocarbon slicks were apparent in the
sediment. treatment chambers of all units and were
Three Hynds CleansAll® units were removed by vacuum truck prior to the
Removing sediment as well as larger
installed: one at Sylvia Park Road and catchment baskets being lifted.
pollutants is important because most of
the heavy metal contaminants are bound to Hynds Environmental General Manager
sediment particles. Sediment removal greatly Peter Carroll is pleased with the
reduces the level of contaminants entering performance of the CleansAll® units.
the environment as well as improving the “The big advantage of these units is that
colour and clarity of the water. they remove pollutants of all sizes from
At Sylvia Park Road, the Hynds CleansAll® stormwater systems, allowing only clean
units captured mainly sediments from water to pass through,” he says. “It’s
road and industrial runoff, as well as a satisfying knowing that the local marine
considerable amount of small plastic chips environment will be improved as a result.”
that are used by a factory in the catchment
Runoff from the Mutukaroa Regional Park
captured in the Great South Road units
Client Auckland City Council
revealed that signiﬁcant quantities of
Engineer Beca Carter Hollings & Ferner
the pollutants were organic in nature.
Contractor Jesmond Construction
Collection results from this site were
Hynds Env. Niki Johnstone
improved by the simple installation of a contact
grille over the inlet pipe. This acted as a Brochure EV08 CleansAll Gross Pollutant Trap
partial ﬁlter and stopped a large amount
Maintenance of the Hynds CleansAll® is safe,
quick and simple.
Cut-away illustration of CleansAll® Gross
d r a i n a g e
Special precast concrete twin-outlet Precasting team sets bar higher
structure before delivery, and
above right, doing its job on site.
Innovative Precast Precast chamber saves time
Hynds’s Palmerston North precasting factory, in Hutt City Council recently made improvements to
tandem with our sales and technical teams, is the Hutt Park Roundabout in Seaview, Lower Hutt.
gaining a great reputation for its innovative precast The project involved enlarging the roundabout
solutions tailored to customer needs. to improve trafﬁc ﬂows, incorporating a new
stormwater system with a large pump chamber to
With a 12-strong workforce, the factory
guard against ﬂooding.
manufactures a wide range of quality precast
concrete products from street sumps, retention The 55-tonne chamber was designed by GHD
tanks and box culverts to one-off, large civil pump Consultants to be poured on site. Hynds saw an
chambers. opportunity to provide a precast option, saving
the contractor a great deal of time and effort. The
Knowledgeable staff, friendly service and an
extremely high groundwater level on the site also
excellent product range offers the contractor
made the precast drop-in unit the preferred solution.
reduced on-site time and simpler, more practical
installation. Client Peter Mann, Hutt City Council
Realignment smoothes Wellington Engineer Ann Lavers, Consulting Engineer; GHD Limited
trafﬁc ﬂows. Contractor Jonathan Bibblewhite, Project Manager;
Higgens Contractors Wellington
The multi-million-dollar Transit New Zealand Hynds contact Neil Rodger, Sales Representative
Weigh Station to James Street project involved the Products Box Culverts & Underpasses
realignment and four-laning of State Highway 1 in
Underpass to improve tourist safety
Plimmerton to improve trafﬁc ﬂows in and out of
Wellington. The Transit NZ – Lindale Underpass project will
provide a new entrance into the Lindale tourist
The contract included two large gabion headwall
complex facility at Paraparaumu by way of an
structures each accommodating twin 1650Ø
underpass, greatly improving safety.
pipes at a skew. Action Plumbing and Drainage
approached Hynds Pipes to develop an alternative. Hynds is providing Stringfellow Contractors with a
range of various diameter pipes to take over the
The solution, approved by the project’s consulting
existing stormwater services. In addition, 11 Hynds
engineers, was a double 1650Ø L-shaped wingwall,
box culverts with a three-metre span and height of 1.5
with an exposed aggregate ﬁnish. Manufactured
metres were installed so that a stream could be piped
at the Hynds Palmerston North factory, these
under the new road entrance to the Lindale complex.
wingwalls weighed approximately 11 tonnes each.
The box culverts each weigh 8.4 tonnes and were
Client Catherine Worsley, Project Manager; Transit NZ made at the Hynds Palmerston North factory.
Contractor Chris Wright, Contract Manager;
Higgins Contrators, Wellington
Client Transit NZ
Sub Contractor Dave Mutagh, Director;
Action Plumbing & Drainage Limited Engineer Bob Barraclough, MWH Paraparaumu
Hynds contact Neil Rodger, Sales Representative Contractor Paul Ashcroft, Project Manager; Juno Civil
Products Rubber Ring Jointed Pipe, Wingwalls, Hynds contact Neil Rodger, Sales Representative
Box Culverts & Underpasses,
Precast Concrete Pipe Products Box Culverts & Underpasses
Golf course system
‘out of sight’
Build an invisible commercial wastewater surrounding hills through a pressure-
treatment plant? Hynds Environmental compensated drip line.
faced that challenge during the
The top of the system had to be at least
development of a world-class golf course
one metre below ﬁnished ground level, so
at Cape Kidnappers, Hawkes Bay.
Hynds Environmental engineers designed a
When Capet Holdings Limited (CHL) series of special concrete risers and lids to
approached Hynds Environmental for a achieve the desired ‘invisible’ effect while
suitable wastewater treatment system, it retaining ease of access for maintenance.
stipulated that not only must it be capable The modular design of the system allows
of treating the expected 7000 litres a day for easy and cost-effective expansion.
efﬂuent to a very high standard and able to
The project was Hynds Environmental’s
withstand heavy trafﬁc loading, but it also
ﬁrst for CHL, whose Project Manager, Peter
had to be completely hidden.
Healey, said: “The system successfully
Client Capet Holdings Limited
The answer was a wastewater system met the stringent requirements of the
Engineer Capet Holdings Limited
comprising a series of precast concrete local authorities and of our client. Equally
Contractor Hynds Environmental
chambers incorporating primary important was Hynds Environmental’s
Hynds Env. Niki Johnstone & John Bradford
contact separation, surge protection, submerged ability to provide ongoing maintenance
Brochure EV36 Hynds SAF Commercial aerated ﬁltration and ﬁnal clariﬁcation. and support”.
Reference Wastewater System The efﬂuent is then discharged to the
d r a i n a g e
The previously hilly terrain was sculpted to form a
stunning golf course at Cape Kidnappers.
The precast components of a Hynds Commercial
Wastewater Treatment System are installed in
less than a day.
Treated efﬂuent is discharged to the hills
surrounding the golf course.
Extensive waterworks and drainage were necessary
for the reticulation of water to tees and greens.
ensures all-weather play
How long did it take to play the ﬁrst round
of golf on the new 18-hole course at Cape
Kidnappers? About a year. That’s how
long it took to convert what was a working
sheep and cattle station into the world
class venue we see today.
Situated on prime coastal land and boasting
stunning views, the new golf course was
no easy transformation. Contractors Fulton
Hogan brought in heavy machinery to
ﬂatten the terrain, and create a huge
man-made lake for use as water storage.
Extensive waterworks and drainage were
necessary for the reticulation of water to
tees and greens and to ensure the course
remains playable throughout the year.
A new roading system and eleven new
bridges were also put in to provide easy
access to all areas of the golf course.
Hynds Pipe Systems supplied piping and
related ﬁttings for the project, including
three and a half to 4km of Nova coil for the
18 holes. The extensive drainage system
Client Julian Robinson
runs along the fairways and around the
Engineer Michael Newby, Consulting Engineer;
greens, minimising the interruption to Holmes Consulting Group
play caused by wet weather. Hynds sales Contractor Craig Brookes, Project Manager; Fulton Hogan
representative Chris Jensen has seen the Hynds contact Chris Jensen, Sales Representative
new course in action and describes it as: Products Rubber Ring Jointed Pipes, Manhole System,
“Just sensational.” Cesspits
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John Hynds honoured in Manukau Business Hall
Hynds chairman John Hynds was inducted “It has been a huge learning curve and
into the Manukau Business Hall of Fame continues to be so. We have developed a
at this year’s Westpac Manukau Business team of people who are vitally important
Excellence Awards 2005 – one of just 14 to the success of our company.”
people to belong to this prestigious roll
of honour. John emphasises that his success
in building Hynds could not have been
The Manukau Business Hall of Fame was possible without the incredible support
established in 2000 to recognise a lifetime and love of his wife, Leonie, and two sons,
achievement of outstanding Manukau
Adrian and Aaron. He remembers his boys
business people and to reward the
holding the tape for him on Sundays while
perseverance, entrepreneurship, risk taking
he measured up jobs, and says Adrian
and success of Manukau’s business icons.
at age 12 was a great help at weekends
Hall of Fame candidates must have made a loading up trucks with the digger.
‘profound difference’ over the years to the
“You couldn’t do that today with all the
Manukau business community with loyalty
stringent health and safety regulations,
and commitment to the region.
but I have a sense of pride when I recall
John Hynds established his multi-award- how we all pitched in as a family in those
winning company Hynds Pipe Systems early days.”
in 1973 with just one employee at East
Tamaki. Under his leadership, the team has Under John’s leadership, Hynds Pipe
grown to 500 throughout the country. and Systems has won a number of business
more than a million kilometres of Hynds awards, including the Westpac Manukau
pipe materials are being used underground Business of the Year (1999). Also in 1999,
to form New Zealand’s drainage, water John was awarded the Ernst & Young
supply and ducting networks. Entrepreneur of the Year Award.
n e w s
The community of Dovedale in Tasman
District narrowly avoided a water crisis
shortly before Christmas, after a routine
check revealed that a water tank
supplying rural customers was on the
brink of failure.
of Fame Works Infrastructure Nelson, contractor for
the Tasman District Council, immediately
took action to prevent a failure occurring
Some of Hynds Pipe Systems’ successful during the holiday period. The timeframe
projects include: for the job was extremely short with the
added pressure of the Christmas rush.
• Otahuhu Power Station. Hynds Pipes
Systems was able to supply an
engineered solution and home grown Hynds Pipe Systems supplied eight
material. 30,000-litre plastic tanks to replace the
• Stormwater pipes at Western Springs.
failing tank and, as there was no road
These won the company a special
access to the hilltop where the reservoir
commendation from Auckland City
stood, a helicopter lifted the new tanks
into position. The other transport option
– Santa’s sleigh – was fully employed at
• External formwork for the Sky Tower. the time!
• Last year, John was made an honorary
life member of Ingenium, for his Above
A helicopter lifted the new water
outstanding contribution to both it and tanks into position.
public asset engineering. He is a current
member of the New Zealand Business Client Tasman District Council
Round Table and a life member of the Engineer Phil Bevin; MWH
Auckland branch of the New Zealand Contractor Keith Pedley, Project Manager;
Hynds contact Rob Thomson, Branch Manager, Nelson
Products Water Tanks
38 w s
Humour a crowd pleaser
Visitors were in no doubt they had arrived frame and design parameters at least a
at the Hynds Pipe Systems display at this month before the event. Each was tasked
year’s New Zealand National Agricultural with creating a separate display that could
Fieldays at Mystery Creek near Hamilton. be incorporated into the site.
that hold out a warm welcome to all
A large ramp guided visitors towards the Though Hynds Pipe Systems display did not
visitors, even those who just need to
fantastic display in keeping with the event’s win an award this year, last year was the
take the weight off their feet while their
feature: People on Farms – Managing Your third successive year it had been awarded
partners discuss their problems with the
Workplace and a couple of tongue-in- Certiﬁcate of Merit. Last year’s Fieldays
theme was Energy Efﬁcient Farming Hynds staff.
cheek ‘human resources management’
scenarios gave them a chuckle. A forlorn – Sustainable Beneﬁts, and Hynds’s Products are displayed in novel ways,
mannequin in the stocks demonstrated entry was judged Best Medium Outdoor using moving parts to attract the crowds
‘how not to treat staff’ and ‘the right way exhibit. It was a credit to the company’s close enough to be rewarded with product
to treat staff’ was depicted by a cheerful personnel who conceived, designed, built specials and special prizes.
picnic scene, again with mannequins but and manned the exhibit.
“Credit must go to the Hynds personnel
this time enjoying a gin and tonic or a “Health and safety considerations and manning the stand,” says Ian. “It’s one
glass of wine! the Fieldays’ speciﬁcations are a big part thing to be knowledgeable, but to stay
of the deliberations,” says Ian, “but it’s happy and helpful for the duration requires
The award-winning Fieldays team
always fun seeing what we can come up
comprising Ian Burborough, Bryan a positive disposition and real stamina,
Running, Clint Kiernan and Tom Rostron especially if the weather is inclement
put their heads together and set time- Ian has a reputation for designing stands and the foot trafﬁc heavy. Fortunately, the
Troughs ﬁnd new home
Children love the playground at Totara railway sleepers, old container crates
Park at Manurewa. Not only is it a and troughs donated by Hynds Pipe
great place to play and mix with Systems for the playground.
other children, its earthy textures and
“The council’s aim is to develop
materials give it a very homely feel.
neighbourhood parks that reﬂect
Originally designed and built for the the community around them. This
Ellerslie Flower Show, the playground playground shows how parks can be
was relocated to its present site to form
an extension of people’s backyards,”
part of Manukau City Council’s network
said Digby Whyte, the council’s Parks
of children’s neighbourhood parks. It
contains a wide range of activities
including tree huts, sand, rock and The playground’s design team at
wood ‘play pods’, nets and climbing Isthmus Group sought large concrete
walls within an environmentally friendly pipes for to use as creative ‘play pods’,
and educational site. that were an integral part of the park’s
Consistent with its commitment to design. Six concrete troughs were
recycling, Manukau City Council used donated, three large and three smaller,
recycled and re-used materials such as which were perfect for the job.
n e w s
Hynds culture is full of cheery souls.” products and our staff,” says Tom. Opposite page
Left to right: Gary Mangino; Roger
Hynds regards the Fieldays as an When all’s said and done, the New Zealand Pinkerton; Jon Aitken; Susan Brunton;
opportunity to ‘show and tell’. Last year National Agricultural Fieldays is the most Daryl Wheatley; Chris Jensen; Blair Foote;
Tom Rostron; Dave Crake.
there were 842 exhibitors and almost important agricultural exhibition on the
115,000 visitors. National and international farming calendar. It’s the once-a-year This page
Above, left to right
sales generated by the four-day event held opportunity to meet face to face with a The 2004 Fieldays display; Hynds display
huge number of equipment and service for Fieldays 2005, after much construction;
in June came to $219.7 million, $131.5 Introducing the ‘drain man’.
million of which related to orders and sales
at the Fieldays. Only nine years ago that
ﬁgure was $25 million.
It will take a while for orders to ﬂow through
from this year’s event, but there was
plenty of interest from farmers and small-
block holders, says Tom Rostron. “It gives
our customers and potential customers
the chance to have direct access to our
The smaller troughs were placed inside
the larger ones and the gap was capped
with macrocarpa timber to create pods.
Children can play on the inside of the
pods or sit up on the top.
Isthmus Group landscape architect,
Helen Kerr says: “It was insightful of
Manukau City Council to provide the
opportunity to inject more creativity
into playground design with the use
of recycled and unusual materials. The
troughs were perfect for the job and a
unusual element that isn’t usually used
Opposite page in playground design.”
Left & above Client Shona Fisher, Landscape
Children enjoy the playground after its Architect Manukau Parks
relocation to Totara Park. Designers Isthmus Group
This page Construction Tina Dyer, Project Manager; Recreation Services
Right Joe Moores; Commercial Play Systems
Playground assembled for the Ellerslie Flower Products Cattle Troughs
40 w s
conducting S-Mark compliance testing,
and analysing and communicating quality
data, provide a good example of this
philosophy in action.
All members of this team have progressed
from the shop ﬂoor. To be effective,
team members require good levels of
communication, technical knowledge and
a thorough understanding of the concrete-
pipe-making process. It is this that enables
them to work side by side with other teams
throughout the company.
Says Hynds Pipe Systems’s Environmental/
Quality Manager Niko Tovia: “Our success
Continuous improvement approach
is built on the careful planning done when
underscores S-Mark quality this initiative was conceived almost three
years ago. With the right people in the
It is increasingly important that companies • Providing high-level training to staff right place with the right training, we
tendering for local, regional and to empower decision-making on the ensure that the necessary compliance-
central government contracts meet the shop ﬂoor; so decisions can be made related activities are co-ordinated in the
speciﬁcations set out under NZS3107:1978, by those with the key knowledge and factories and on site.”
the New Zealand standard for precast skills, in the right place at the right The Continuous Improvement philosophy
concrete drainage and pressure pipes. time. has impressed the company’s auditors.
Bureau Veritas has been auditing
NZS3107:1978 requires a minimum of • Workplace ownership to encourage
Hynds Pipe Systems Limited against
20 areas of compliance, of which at least staff to take pride and accept
the specifications laid out under
10 are sampled randomly and selected responsibility for their areas of
NZS3107:1978 since February 2002 when
for audit. The auditing process includes operations.
the company was granted a Bureau Veritas
a review of quality planning, compliance
• Encouraging teamwork through Certiﬁcation Mark Licence. To maintain
testing, staff training and manufacturing
the formation of an open, mutually its licence, Hynds must continually
procedures and processes. monitor its products to ensure that the
This means that gaining and maintaining requirements of NZS3107:1978 are met,
• Regular formalised meetings and
NZS3107:1978 not only requires that we including the keeping of management
discussions to encourage open and records for process control parameters,
demonstrate an in-depth understanding
honest communication between work instructions, inspection and testing,
of process and process capability, but
teams, furthering creativity and as well as purchasing speciﬁcations and
also that we possess the capability for
accountability. training records.
identifying areas for improvement – and
act on those. “Twice-yearly visits by Bureau Veritas
Since the introduction of the Continuous have shown that Hynds is maintaining its
Hynds’s processes are drawn from the
Improvement approach, staff throughout systems and addressing mechanisms to
knowledge and experience of our staff. At
Hynds have shown increased levels of improve them,” says Bureau Veritas auditor
our East Tamaki site, we have successfully
awareness, and have been more willing Peter Hewitt. “Particularly impressive is
adopted a Continuous Improvement
to make effective and timely decisions the training that Hynds employees receive.
approach that is the basis of our quality
Records are kept for each operator showing
control. It enables us to maintain our all- that identify and deal with the core areas
that they are assessed by oral and written
important S-Mark accreditation. responsible for quality issues.
test to reinforce understanding of the
This Continuous Improvement philosophy The lab team, which is responsible for operations that they are responsible for.
includes: calibrating test equipment and gauges, Conﬁdence can therefore be assured.”
Hynds East Tamaki staff members, Samata Oa, Auditor Peter Hewitt, Auditor; Bureau Veritas
Paul Ah Chong, Suliasi Aho, Semi Liu, Terita
Vaipulu and Hanalofa Ma’amaloa... the right Hynds Contact Niko Tovia, Hynds Pipe Systems’s
people, in the right place with the right training. Environmental Quality Manager
n e w s
Ideas set in
Landscape designer Damian Wendelborn uses
modern industrial drainage pipes in extraordinary
Clients looking for a contemporary outdoor living
with minimal maintenance delight in his use
of concrete boxes, culverts, pipes – and even
cattle stops – to create clean lines and peaceful
settings with the minimum of fuss.
The owner of Urbanite Landscape Design, Damian
transforms such commonplace construction,
farm and environmental engineering products
into sleek and quirky design features.
His company’s ‘town meets country’ display was
a real hit at the Auckland Home Show.
Among its highlights were:
• Concrete box ‘water spouts’ set into a rock
wall above a restful pool;
• Kentia palms in a stylish box culvert planter,
• A protective grid, made from a concrete
cattle stop and set in a section of high-trafﬁc
lawn next to a deck.
Above and bottom of page
Occasionally Damian adds a touch of humour Display garden created by Urbanite Landscape Design,
to his designs, as with a set of planter columns complete with box culvert water spouts and cattle stops
in the lawn.
for a small, townhouse garden. They are
constructed from cesspit risers, mortared
Client Auckland Home Show
together, ﬁlled with soil and planted with the
Designers Damian Wendelborn, Urbanite Landscape Design
bromeliad species Alcanterea imperialis and
Products Cattle Stop, Cesspit Risers
Photography supplied by Trends Publishing International. Photographer: Kallan MacLeod
Photos above and bottom right
Te Kuiti Taupo
• BUILDING Palmerston North
• ENVIRONMENTAL Wellington
• UTILITIES DUCTING
Hynds is made up of a dedicated
team, focused on providing quality • RURAL
products - delivered with the best
value and service to you on time. • TOOLS Amberley
BRANCHES NATIONWIDE KEY
SALES BRANCH LOCATIONS
NEW BRANCH NOW OPEN IN CROMWELL!! Cromwell
0800 WE PIPE Winton
Which would you prefer...
this... ...or this?
Providing Engineered solutions for:
• Stormwater Treatment Systems • Oil Water Separators
• Spill Management Systems • Wastewater Treatment Systems
Phone 0800 425 433 or visit www.hynds.co.nz