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Mountain Pump Station

Mountain Pump Station

Mountain Pump Station

Hikurangi Swamp Pump replacement Proposal to defer further capital replacement of pumps by managing existing Pleugers

Table: 1 Pump Replacement Programme (year of planned replacement in bold, % of flow pumped by a particular pump in brackets) ~1.1 m 3 /s Pumps ~ 4.1 m 3 /s Pumps Station Station Capacity A B C D E (m 3 /s) Otonga Flygt (17%) Flygt (17%) Pleuger (65%) 6.3 (2018) Te Mata Pleuger (17%) Flygt (17%) KSB (65%) 6.3 (2018) (New 2012) Mountain Pleuger (50%) KSB (50%) 2.2 (2015) (New 2013) Tanekaha McKewen (50%) Pleuger (50%) 2.2 (2022) (2015) Junction Pleuger (100%) 1.1 (2015) Ngararatunua Pleuger (11%) Pleuger (11%) Pleuger (39%) Pleuger (39%) 10.4 (2018) (2018) (2018) (2015) Okarika Pleuger (10%) Pleuger (10%) Pleuger (10%) Pleuger (35%) Pleuger (35%) 11.5 (2022) (2022) (2021) (2015) (2018)

LTP Capital Funding

Overcoming problems with the Pleugers Rewinding is costly and time consuming; • SAAW offer an alternative to Flow Serve at a lower cost Insitu windings that are susceptible to leakage, and faulting of the pump • Maintain stock of spares Historically cannot be removed during a flood, meaning repairs during service are difficult; • Pumps Northland can replace 80hp pumps underwater. Some modifications to installations needed to make removal easier. • Question still remains about 240hp

Recommendations Recommendation • That an 80hp Pleuger be sent to SAAW and be rewound as a spare this financial year and funded from the Opex budget. • That pump stations are modified to assist removal underwater • That a price to rewind a 240hp Pleuger be obtained from SAAW, with the work programmed to be done in July 2013 and funded from the Pump Renewal Capex Budget • That a 80hp pleuger be sent to SAAW next financial year and be rewound as a further spare. This work to be funded from the Pump Renewal Capex budget.

Hikurangi Swamp Pumps Impact on debt position – assuming no pump capital 6,000,000 4,000,000 No Pump Replacement 2,000,000 Current Scenario 0 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 (2,000,000) (4,000,000) (6,000,000)

Stock Restriction– Site Visit 11.2.13 Southern side – Okarika Pocket

Pugging Damage to Okarika spillway

Ngaratunua pump station – looking West

Otonga Pocket – looking North from bank

Mountain Pocket – looking North from bank