our water is precious he taonga te wai

Kapiti Coast: Water Supply Options Considered

SHORT-LISTED OPTIONS IN-CATCHMENT

Run of River 12 Kapakapanui Dam N 13 Ngatiawa Dam Dams SH1 18 Lower Maungakotukutuku Dam Storage Ponds 27 Aquifer Storage and Recovery Groundwater 29 Groundwater River Recharge

River Recharge 23 Extended Borefield & 38 Storage Pond Waitohu Stream OTAKI BEACH SHORT-LISTED OPTIONS OUT-OF-CATCHMENT Other 2 Otaki River Gorge 3 Otaki River Gorge Transfer Otaki River 4 Otaki Wellfield and Pipeline 4 1 OTAKI 8 Kapiti District Integrated Water Supply 39 (not shown on map) NOT SHORT-LISTED Mangaone Stream TE HORO 6 Akatarawa River Transfer 11 Waikanae WTP Dam 16 Reikorangi Dam (Cambridge Farm) 5 2 19 Low-low Maungakotukutuku Dam SH1 3 9 20 GWRC Whakatikei Dam 21 Storage Ponds – West of SH1 33 23 27 22 Storage Ponds – East of SH1 26 26 Deep Groundwater Waikanae River Otaki Forks Waikanae River Kapiti District Integrated Water Supply - 31 40 Otaki Gorge (not shown on map) 36637721 24 WAIKANAE 3838 2828 2929 34 22 3035 11 12 ELIMINATED OPTIONS Eliminated through second screening PARAPARAUMU 10 131 1 Waitohu Stream 19 15 Maungakotukutukugakoga Streamm Ngatitawa River TARARUA STATE 16 5 Mangaone Stream 18 Rangiora Rivererr2525 FOREST PARK RAUMATI 14 7 Whakatikei River Transfer Waitohu Dam Reikorangi Stream 8 9 Mangaone Dam 17 Combined Storage Dam in the Waikanae 10 River 14 Upper Ngatiawa Dam SH1 15 Rangiora Dam PAEKAKARIKI 24 Eastern Waikanae Borefield 31 River Recycle 37 Non-potable Reticulation Network 6 (“Dual Pipe” System) 32 7 Eliminated through initial screening

Whakatiki River 17 Upper Maungakotukutuku Dam Akatarawa River 25 Ngatiawa Aquaflow 28 Wastewater River Recharge

30 Wastewater & Groundwater River Recharge

32 Wellington Regional Supply 20 33 Desalination 34 Potable Water Substitution 35 Indirect Potable Reuse 36 Direct Potable Reuse Locations are approximate only

Kapiti Coast District Council // Water Supply Options // 11 March 2010