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Council Agenda - Kangaroo Island Council - SA.Gov.au

Council Agenda - Kangaroo Island Council - SA.Gov.au

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The cost option for this is estimated as:<br />

WWTP / Lagoon Option<br />

3<br />

Subsidy $3,003,282<br />

<strong>Council</strong><br />

Contribution<br />

$1,252,779<br />

Total Project Cost $4,256,061<br />

This location allows for expansion, it presents a much lessor visual amenity issue as it will<br />

essentially not be overlooked either from the south or the east and is away from the town<br />

centre in an area that is not zoned for residential / rural living. The initial lagoon will be 5ML<br />

in capacity – the equivalent of a standard farmer’s turkey nest (30m2 base or 50m2 centre<br />

bank to bank). Subsequent lagoons would be installed to the rear of this in a nested fashion<br />

either of 5 or 10ML capacities – this then mitigates cost and disruption c<strong>au</strong>sed by routine<br />

liner replacement. The design is also distant from any water course (unlike the other<br />

options).<br />

The financial analysis of this option for <strong>Council</strong>’s component demonstrates that this is<br />

manageable over a 20 year timeframe with the assumption that the Annual Service Charge<br />

for Wastewater is as budgeted in 2013-14 at $562 / service. The new project is therefore<br />

self-servicing and does not impact the costs associated with the other schemes at American<br />

River, Kingscote, Parndana or Parndana East.<br />

It should be noted that any capital cost increase during final design / construction from this<br />

element of the project alone would be to <strong>Council</strong>’s cost and not picked up through a revised<br />

subsidy calculation. This is due to the Scheme being prepared to fund the “minimum” cost<br />

scheme only.<br />

It is recommended that <strong>Council</strong> adopt this design as its preferred solution and take this<br />

forward to public consultation for a period of no less than 60 days as it:<br />

Provides a wastewater solution for the heart of Penneshaw (including key<br />

commercial and public infrastructure) with a realistic level of borrowing that that<br />

<strong>Council</strong> is able to financially service from revenues generated.<br />

Provides for the possibility of organic growth (extension) of the collection network<br />

over time by providing for the ability to expand the wastewater treatment plant<br />

(WWTP) and treated water storage lagoon capacities as required.<br />

The design meets best practise guidelines<br />

Should <strong>Council</strong> adopt this design for the purposes of public consultation then we would<br />

instruct the Engineers to continue with final design and specification work, including<br />

additional geotechnical and design analysis in order that <strong>Council</strong> may receive a report<br />

confirming the suitability of the design prior to moving into the prudential review process.<br />

This will also allow the <strong>Council</strong> to commence the Development Application and Approval<br />

Process. The completion of specifications will also allow <strong>Council</strong> to run a request for interest<br />

process and test the suggested construction costs for the project as well.<br />

<strong>Kangaroo</strong> <strong>Island</strong> <strong>Council</strong> – 10 July 2013 <strong>Agenda</strong> 20

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