Presentation on theme: "Colonel Sir Thomas Robert Gore Browne William Walter Cargill John Turnbull Thomson Governor of New Zealand Founder of the Province of Otago."— Presentation transcript:
Colonel Sir Thomas Robert Gore Browne William Walter Cargill John Turnbull Thomson Governor of New Zealand Founder of the Province of Otago Surveyor-General of New Zealand
Invercargill Water Tower: -125 feet/38 metres high -Contains over 300,000 bricks -Roughly 11,000 bricks/metre -Holds 65,000 gallons/297m3 -Has “Safety factor of ten” -Waterworks opened 19/9/1888 -Tower foundations 18/12/1888 -Completed Easter Designed by William Sharp -Tower by M. & H. Mair -Tank by W. Guthrie & Co. -Tower cost £1497 7s 6d -Tank cost £1273 -Original cupola removed Cupola replaced Closed to public 2012
pH7.0 TDS92 mg/L Iron (Fe)1.3 mg/L (sampled in medium flood) Chloride10.4 mg/L T. Hardness<10 mg/L Calcium6.2 mg/L Magnesium2.2 mg/L pH5.5 – 5.9 TDS165 – 1,080 mg/L Iron (Fe)1.1 – 27 mg/L Manganese0 – 0.33 mg/L Chloride39 – 370 mg/L T. Hardness48 – 314 mg/L Calcium9.8 – 64 mg/L Magnesium 5.7 – 37.4 mg/L
Can’t continue with town water with wartime supply issues Wants to develop own supply from the Oreti River Wants the City of Invercargill to get a move on if they are serious about a supply from Branxholme Finally issues ultimatum: either you build it or we will, and leave you high and dry in the process… Preferred future water supply is still the Dunsdale Stream Wants to supplement current supply from the Oreti River Continues to dither about with alternative sources and trialling better treatment of bore water Asks Railways to help build and develop Branxholme Water Supply to Invercargill…
Accelator Sludge Recirculating Clarifier: 90 feet wide, 15 feet deep. 8 million gallons per day. Opened 10/12/1970 Greenleaf Filters: Two banks of four filters. Each filter 400ft2 218m3/h, or ~41,000m3/d
Portals Flat-Bottomed Clarifier: 27m x 12m x 5.5m (1782m3). 8 million gallons per day. Opened 16/11/1983. Portals Filters: Four filters. Each filter 27m2. 187m3/h or ~18,000m3/d.
125 Years of Water Supply in Invercargill.
Paul Markholm (aka Steampig), John Agnew, Weston Langford, Tony Batchelor, David Donaldson and Shane McDowall for all their photos, input and archives. Archives New Zealand (Dunedin and Wellington) and The National Library of New Zealand who came up with all the juicy files from the dark past and the aerial photos of old Invercargill. Joe Wilson, Nick Knight and Adrian Cocker who helped where they could with references, knowledge and support (and time to do it all!) Everyone else whose photos, ideas and rumours I’ve either outright stolen or plagiarised to make this presentation happen….