effect on the water quality downstream of the Kaimiro Production Station.
There were no adverse effects on the environment resulting from the exercise of the air discharge consents.
Ambient air quality monitoring at the Kaimiro Production Station showed that levels of carbon monoxide,
combustible gases, PM10 particulates, and nitrogen oxides were all below levels of concern at the time of
sampling. No offensive or objectionable odours were detected beyond the boundary during inspections.
Mangamahoe, and small areas around key HEPs infrastructure. Trustpower
does not own or manage other land within the wider catchment.
3 https://shiny.niwa.co.nz/nzrivermaps/
4 https://niwa.maps.arcgis.com/apps/webappviewer/index.html?id=933e8f24fe9140f99dfb57173087f27d
5 GNS 250K.
6 New Zealand Soil Classification
7 https://www.lawa.org.nz/explore-data/land-cover/
annotation https://shiny.niwa.co.nz/nzrivermaps/ https://shiny.niwa.co.nz/nzrivermaps/
annotation
indicate that the stormwater discharges from the Kupe
Production Station had caused adverse effects on the water quality of the Kapuni Stream.
There were no adverse effects on the environment resulting from the exercise of the air discharge consents.
The ambient air quality monitoring at the site showed that levels of carbon monoxide, combustible gases,
PM10 particulates, and nitrogen oxides were all below levels of concern at the time of sampling. No offensive
or objectionable odours were
the
conditions of the applicable resource consents. There is no evidence of any issues with any injection well
currently in use, or the ability of the receiving formations to accept injected fluids. The results of
groundwater quality monitoring undertaken show no adverse effects of the activity on local groundwater
resources. Inspections undertaken during the monitoring year found sites being operated in a professional
manner and there were no unauthorised incidents in relation to any of the
report.
1.1.3 The Resource Management Act 1991 and monitoring
The RMA primarily addresses environmental ‘effects’ which are defined as positive or adverse, temporary or
permanent, past, present or future, or cumulative. Effects may arise in relation to:
a. the neighbourhood or the wider community around an activity, and may include cultural and social-
economic effects;
b. physical effects on the locality, including landscape, amenity and visual effects;
c. ecosystems, including effects
Conclusions 64
7 Applicability 67
8 References 68
Appendix A : Hydrograph Plots
page
1
Tonkin & Taylor Ltd
Reconsenting of Mangorei Hydroelectric Power Scheme - Hydrology ReportHydrology Report
Trustpower Ltd
November 2020 (Final)
Job No: 1008726.200
1 Introduction
1.1 Context
Trustpower Ltd (TrustPower) owns and operates the Mangorei Hydroelectric Power Scheme
(Mangorei HEPS, or “MGR”), which is located mid-catchment in the Waiwhakaiho River catchment
within the Taranaki
restriction of fish passage in the Manganui River for
indigenous and introduced fish species as a result of the
diversion weir.
No – the diversion weir is
necessary to provide sufficient
head / impoundment to enable the
diversion of water into the
Motukawa Race. If the weir was to
be removed, or replaced with a
lower head structure, this would
require significant civil works in the
bed of the Manganui River and the
lowering of the Motukawa Race in
order to ensure there is sufficient
environmental ‘effects’ which are defined as positive or adverse, temporary or
permanent, past, present or future, or cumulative. Effects may arise in relation to:
a. the neighbourhood or the wider community around an activity, and may include cultural and social-
economic effects;
b. physical effects on the locality, including landscape, amenity and visual effects;
c. ecosystems, including effects on plants, animals, or habitats, whether aquatic or terrestrial;
d. natural and physical resources
cease the diversion and taking of water from the Waiwhakaiho
River within 30 minutes of the monitoring recorder at ‘Waiwhakaiho at Egmont Village’
(operated and maintained by the Taranaki Regional Council) recording a flow greater than or
equal to 85 cubic metres per second (as measured at 15 minute intervals).
4. The consent holder shall record the residual flow provided in the Waiwhakaiho River
downstream of the diversion weir, and shall provide records of such
zinc contamination in the discharge. However, monitoring
results have shown that zinc concentrations have generally continued to decline over time. Sampling
undertaken in the current period found zinc concentrations were within the resource consent condition
limits and that there was no likely effect on the receiving environment downstream of the site.
In the reported period, no effects from the emissions to air from the galvanising site were detected at or
beyond the boundary of the site.