....................................................................................................................................................... 70
Other land use ................................................................................................................................................ 71
Taking and use of surface water .................................................................................................................. 72
Bore or well hole construction and management ...................................................................................... 77
Taking and use of groundwater
5081-1 to erect, place,
use and maintain the Mangaotea Aqueduct in and above the
Mangaotea Stream 72
Table 20 Summary of performance for Consent 5082-1 to discharge,
under emergency conditions, up to 2000 L/s of overflow
water from the Mangaotea Aqueduct into the Mangaotea
Stream 72
Table 21 Summary of performance for Consent 5084-1 to discharge
up to 55000 L/s of HEP generation water, during adverse
weather conditions, from Lake Ratapiko into the Mako
Stream 73
Table 22 Summary
2017-2022
pH pH 6.1 6.2 6.1 6.0 5.9 6.3
Total alkalinity g/m3 CaCO3 47 40 57 59 39 68
Carbonate g/m3 CO3 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0
Bicarbonate g/m3 HCO3 57 49 69 72 47 82
Total hardness g/m3 CaCO3 45 37 43 52 32 56
Electrical conductivity mS/m 14.3 12.1 15.6 16.9 12.1 18.3
Total suspended solids g/m3 <3 <3 <3 <3 <3 3200
Total dissolved solids g/m3 91 78 102 93 78 151
Dissolved aluminium g/m3 - - <0.003 - <0.003 0.005
Dissolved arsenic g/m3 - - <0.0010 - <0.0010 <0.0010
Dissolved
Policy & Planning Committee agenda September 2020
Policy and Planning Agenda March 2025
2.1 10.4 - 8.2 - 1.98 1.98
Nitrite g/m3 N - 4.0 - 0.004 0.005 0.023 0.03 1.1 - 4.0 - 0.004 0.005
Nitrate g/m3 N - - - 1.97 1.98 2.00 2.1 - - - - 1.97 1.98
Total kjeldahl nitrogen g/m3 N - 166 - - - - - 62 - 166 - - -
Total nitrogen g/m3 - 174 - - - - - 72 - 174 - - -
Free Ammonia as N g/m3 - 3.3 0.0032 0.0002 0.00002 0.0017 0.0011 1.68 0.0015 3.3 0.0032 0.0002 0.00002
Total Ammoniacal-N g/m3 - 135 0.69 0.015 0.022 0.51 0.42 49 0.48 135 0.69 0.015 0.022
Dissolved reactive phosphorus g/m3 P -
Absorption Ratio (SAR) 18 0.7 1.0 1.0 1.6 0.7 0.9
Soluble Salts g/100 g dry wt 0.25 < 0.05 0.09 < 0.05 0.34 0.06 0.06
C10 - C14 mg/kg dry wt 150 330 920 420 7700 185 1260
C15 - C36 mg/kg dry wt 1,300 1700 3700 1490 15800 1230 4400
Total hydrocarbons (C7 - C36) mg/kg dry wt 2000 4700 1920 23000 1420 5600
Chloride mg/kg dry wt 700 70 197 101 1230 24 72
Total Recoverable Barium mg/kg dry wt 10,000 670 2700 2600 1990 3500 3200
page
21
WRS
under review. The report also details the results of the monitoring
undertaken and assesses the environmental effects of the Company’s activities.
During the year the Company held seven resource consents, which included a total of 72 conditions setting
out the requirements that they must satisfy. The Company held one consent to allow it to take water, two
consents to discharge effluent /stormwater into the Kapuni Stream, two consents to discharge to land, one
land use permit, and one consent
migrant species recorded
downstream (including one migrant invertebrate), and only two recorded upstream. Red fin
bully, which was recorded at both sites, was much more abundant downstream (0.23 fish/m2)
than upstream (0.03 fish/m2). Although this species can climb over the weir, it is apparent that
the weir is still a significant barrier to this species.
The seine netting had similar results, with this method recording 72 common smelt
downstream of the weir, at a density of 0.8 fish/m2, but
Operations and Regulatory Committee Agenda 11 June 2024