When it rains this material washes into the stormwater system, and discharges into the
harbour via the numerous piped outlets (Figure 3). In order to minimise deleterious effects on the receiving
environment, Port Taranaki Ltd (Port Taranaki) have implemented a number of preventative measures since
2012, including upgrading the stormwater treatment system and improving stormwater management
procedures. This work is ongoing, as log exports continue to increase.
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4
Waitaha Catchment Annual Report 2022-2023
area for many generations and have seen the slow
demise of the Uruti valley and consequently, the Mimi River.
Because of the now-barren steep hill-country and valleys and
the draining of most swamp areas from Mt Messenger to the
sea, the valley can no longer cope with it's unique weather
patterns of which it is so locally famous for. In the first instance,
frequent torrential downpours and constant rain though the
winter resulting in regular flooding and flash-floods which now
run uninterrupted
Coastal water quality monitoring report 2018-2019
wellsites. Inspections were undertaken on 28 July and 31 October 2022, and
8 March and 16 May 2023. Additional monitoring was undertaken during the monitoring period in relation
to drilling at the Kapuni-J wellsite. This will be discussed in the annual drilling report.
28 July 2022
Heavy persistent rain and strong winds have proceeded the inspection. The stormwater system was working
well, with all stormwater being collected and directed for treatment prior to discharge from site. The site
ammonia g/m³N 0.0005 2.9 0.0006 0.025 g/m³ (d/s)
Dissolved reactive
phosphorus g/m³P 0.015 23 0.014
Suspended solids g/m³ <3 310 <3
Turbidity NTU 1.22 100 1.38
Nitrogen (TKN) g/m³ - 106 -
Nitrogen (TN) g/m³ - 125 -
Potassium (TP) g/m³ - 260 -
Appearance Clear Turbid green Clear
Survey of 18 June 2020
Samples were collected approximately five hours after the discharge had commenced during overcast wet
weather conditions after a period of heavy rain …
telemetered to the Council and reviewed for compliance.
During the period under review CCCWSL complied with the normal operational abstraction limit of 69L/s for
99.8% of the time. There was one occasion when CCCWSL was required to use its exceptional use limit of 79
L/s due to the reservoir levels falling below 80%. Figure 2 shows CCCWSL’s abstraction rate for the 2023/24
monitoring period.
Figure 2 CCCWSL abstraction rates for 2023/24
2.1.4 Hydrological monitoring and residual flow
before being pumped to a nearby reservoir. The water supply is reticulated to approximately 2,300 separate
customers.
Filter backwash is discharged via a large pond. The outlet from the pond is an inverted pipe located at the
opposite end of the pond from the inlet. The discharge from the pond emerges from the pipe to fall over a
small waterfall. At the base of the waterfall the discharged water runs down a natural cobbled channel
beneath native riparian vegetation for approximately 10m
material deposited on the ground in the log and coal
storage areas. When it rains this material washes into the stormwater system, and discharges into the
harbour via the numerous piped outlets (Figure 2). In order to minimise deleterious effects on the receiving
environment, Port Taranaki Ltd (Port Taranaki) have implemented a number of preventative measures since
2012, including upgrading the stormwater treatment system and improving stormwater management
procedures. This work is ongoing, as log