Company demonstrated an overall good level of environmental
performance.
The Patea HEPS was visited two times during the monitoring period, being two site inspections. In addition,
analysis was conducted of generation data, lake level data, Patea River flow and groundwater abstraction
data provided by the Company. The Council also reviewed a number of reports submitted in accordance
with consent conditions. There were no hydrological inspections programmed for the 2018-2019 period, but
environmental performance.
The Patea HEPS was visited four times during the monitoring period, all four being site
inspections. In addition, analysis was conducted of generation data, lake level data, Patea
River flow and groundwater abstraction data provided by the Company. The Council also
reviewed a number of reports submitted in accordance with consent conditions. Previously a
number of hydrological inspections have been undertaken, but these were not required in the
2015-2016 year, due to
Motukawa power scheme.
The Council’s monitoring for the period under review included nine inspections of fish
passage and residual flow facilities, continuous river monitoring at two sites between
November and April each year, a biomonitoring survey, and review of abstraction, discharge,
and lake and race water level data forwarded by the Company, as well as elver transfer data.
The monitoring showed that during the period under review, the management of abstraction
rates, race and lake
consents 6
1.4 Monitoring programme 11
1.4.1 Introduction 11
1.4.2 Programme liaison and management 11
1.4.3 Site inspections 11
1.4.4 Discharge and water quality sampling 11
1.4.5 Review of supplied flow and discharge data 11
1.4.6 Fish survey 11
2 Results 12
2.1 Inspections 12
2.1.1 New Plymouth 12
2.1.2 Okato 12
2.1.3 Oakura 13
2.1.4 Waitara industrial intake weir (contingency take site) 13
2.1.5 Inglewood 13
2.2 Discharge and receiving water
Stream is less than 800 L/s, the rate of taking from the
Tawhiti Stream shall not exceed 184 L/s, unless the turbidity of the Tangahoe River at the take site is greater
than 850 NTU, and then the rate shall not exceed 347 L/s.
In 2019-2020, the Tawhiti abstraction rate did not exceed 184 L/s at any time that the stream flow rate was
less than 800 L/s. The maximum abstraction rate that occurred when the stream flow was below 800 L/s, was
171.7 L/s. The actual stream flow at this time was 795 …
Freshwater Reforms 189
6. Considerations of Stream Size in Determining Minimum Flows and Water Allocation Limits
in Taranaki Rivers
199
7. Report on Advocacy and Response Activities for the 2019/2020 Year 218
Closing Karakia and Karakia for Kai 226
page
Purpose of Policy and Planning Committee meeting
This committee attends to all matters of resource management, biosecurity and related
environment policy.
Responsibilities
Prepare and review …
(adapted from NIWA, 2012)
The effluent from both Ponds 1 and 2 combines at the outlet points from each pond and flows through to
the new maturation pond, constructed in 2009 (Photo 1). The maturation pond has three baffles dividing the
pond into four cells to increase the residence time within the pond. The total HRT for the ponds is estimated
to be approximately 60 days (NIWA, 2012). Final treated effluent from the maturation pond is gravity-fed to
the pump station, from where it is pumped
provided for splitting of the raw sewage influent to flow into either, or
both ponds, but this provision was only intended for utilisation when excessive
stormwater infiltration may have caused an overflow directly to the second pond. The
final outfall (from the second pond) was to the Patea River. However, the connection
between the two ponds and the outlet to the river were originally positioned directly
opposite each other, thereby having the potential to short-circuit and reduce retention
principally for cyanobacteria. (Additional flowing
water benthic cyanobacteria monitoring will be reported within the appropriate periphyton
state of the environment programme). A re-assessed SFRG also has been provided by
inclusion of the current season’s data for comparative purposes and this showed minimal
change.
The results of the 2012-2013 survey have continued to illustrate variability in bacteriological
water quality, with the highest water quality achieved at the Urenui River estuary and
splitting of the raw sewage influent to flow into either, or
both ponds, but this provision was only intended for utilisation when excessive
stormwater infiltration may have caused an overflow directly to the second pond. The
final outfall (from the second pond) was to the Patea River. However, the connection
between the two ponds and the outlet to the river were originally positioned directly
opposite each other, thereby having the potential to short-circuit and reduce retention
time in the