Melbourne Water applies special drainage prices to properties in the Koo Wee Rup: Longwarry Flood Protection District and Patterson Lakes (including Quiet Lakes and Tidal Waterways areas). Part 13 Division 5 Section 259 of the Water Act 1989
gives Melbourne Water the power to levy these charges.
On 30 March 2011, Melbourne Water submitted its 2011-12 price proposal for these special drainage areas. The Commission assessed Melbourne Water’s proposal in accordance to Schedule 4.4 ‘Special Drainage Area Pricing Principles’ of the Commission’s 2008 Melbourne Water Determination.