A study to assess the irrigation infrastructure
necessary to support conversion of the Balmoral
production forest to intensive agriculture.
Project scope included assessment of demand,
assessment of available run-of-river water within
the constraints of the existing scheme and
investigation of storage sites to supplement the
available run of river supply.
Options scoping, consent and detailed design for
a 1600 ha property located in Marlborough in the
South Island of New Zealand. The property will be
a major grape growing and wine producer.
The project includes the construction of a lake
to store and supply water for frost fighting and
irrigation water for grapes. The project site is
adjacent to the Waihopai river near Renwick.
Feasibility study for the headworks for a 17
m³/s run of river diversion scheme for irrigation
on the south bank of the Rakaia river in mid
Canterbury, New Zealand. The project includes
the construction of a diversion intake with fish
passage and screening, a canal and a storage/
settlement pond. The project takes water from the
shingle laden river. Innovative screening, gating
and bypass features were included to remove
sediment and preserve fish passage.
Feasibility Study, detailed design and construction
supervision for a 22 m high embankment dam
for irrigation water supply near Renwick in the
Marlborough region of New Zealand’s South
Island. The project included the construction
of the dam embankment, outlet works, primary
spillway with tower, conduit and stilling basin and
open channel auxiliary spillway. The project site
is located in a small catchment gully draining to
the Wairau river valley. Water is pumped into the
storage and either gravity fed or pumped in the
drier summer period.
Client : Hurunui Community Water Development Project Working Group
Discipline : Irrigation
Identification of storage options, preliminary
design, assessment of environmental effects
and economic analysis for storage options in
the Hurunui catchment in the North Canterbury
region. Demand was assessed on the basis of
some 64,000 ha of potentially irrigable land in
the study area. Initially the project identified 37
storage dam options with the main sites ranging
in size from
20 million cubic metres to 130 million cubic
metres. Six preferred development options were
selected and further studies are ongoing.
Client : North Otago Irrigation Company (Developer)
Discipline : Irrigation
Tender design, detailed design, investigations and construction observation for a $20M (NZ)
irrigation water transfer project in the North
Otago region. The project includes the construction of two large
pumping stations, 2.5 km of earth lined canal, 3
km of 1,800 mm dia buried steel pipeline. This
design build project lifts 8 cumecs of Waitaki river
water from the Waitaki Valley to the top of the
adjacent hills for transmission into the adjacent
Waiareka Kakanui valleys. The two pumpstations
are currently the largest in the country and will
have an installed capacity of some 16 MW to suit
Stage 2 flows.
A range of ongoing services for a 34 m³/s
diversion project which irrigates some 64,000 ha
of land between the Rangitata and Rakaia rivers
in the Mid Canterbury Region. Additionally, the
scheme generates some 27 MW of electricity.
Services include storage enhancement, intake,
race and related structure remedial works
rehabilitation and associated maintenance
Preliminary and detailed design and construction
observation of an innovative run of river intake
and settling basin for this North Canterbury
scheme. The project includes the construction of
a 10.5 m³/s “skimming” intake which takes the
higher level cleaner water from a shingle laden
Waimakariri river. The intake is gate controlled
and a sedimentation basin catches finer sediment.
Subsequent enlargement of the intake was
A feasibility study to enhance water supply to the
water starved Waimea Basin in the South Island.
Water storage is needed to provide a secure
supply to the growing demands of the area. The
study includes consideration of the Lee, Wairoa
and Wai-iti river catchments for storage options
and hence allocation options.