The project was announced in 2007, with an Environment Effects Statement prepared in 2008 in parallel with a tendering process to award the contract, which was signed in July 2009.

Construction began in September 2009 and commissioning was completed in 2012.

The timeline for the project is as follows:

6-Mar-16
Government Provides water storage security 
6-Mar-16 Government acts to provide Geelong with water security
6-Mar-16 Government acts to provide Ballarat with water security
8-Apr-15 A New Vision To Manage And Preserve Our Water Supplies
1-Apr-15 Victoria's Water Storages Currently Secure  
19-Mar-15 Listed Species Monitoring Report
15-Oct-14 AquaSure Board Announces Appointment of New Chair
27-Mar-14 $1.2 billion desal savings and 0GL order for 2014-15
13-Jan-14 New 225ha VDP Ecological Reserve Opening for Local Community
15-Nov-13 VDP wins Australian Water Association (Vic) 2013 Project Innovation Award
6-Nov-13
Planting Complete on Ecological Reserve 
29-Jul-13 AquaSure announces new CEO Appointment 
22-Apr-13 Received Global Water Intelligence 2013 Desalination Plant of the Year Award
17-Dec-12 Desalination plant achieves Reliability Testing Finalisation
30-Nov-12 EPA Discharge Licence Issued
30-Nov-12 Desalination plant achieves Commercial Acceptance
30-Nov-12 Desal Community Information Centre demobilises 
29-Sep-12 Desalination plant achieves Preliminary Commercial Acceptance
26-Sep-12 Drinking water from desalination plant starts flowing into Cardinia Reservoir
6-Sep-12 Desalination plant produces first samples of drinking water
20-Jun-12 Seawater Starts Flowing Into Pump Station
4-Jun-12 Desal workers commended for saving a life 
17-May-12 Planting Complete on Reverse Osmosis Building Roof
1-Apr-12 First annual water order placed
7-Mar-12 Power cable live
24-Feb-12 Flooding of marine tunnels completed
Jan-12 Fibre optic cable installation completed
Nov-11 Hydrotesting of transfer pipeline completed
24-Oct-11 Transfer pipeline installation completed
Sep-11 Power cable installation completed
25-May-11
More Locals Join Desal Team
16-Mar-11 Outlet tunnel completed
3-Feb-11 Jack up barge departs
1-Dec-10 Intake tunnel completed
22-Oct-10 Project named Project Finance Deal of the Year at the CFOAwards
11-Oct-10 Jack up barge arrives on site at Wonthaggi
27-Sep-10 Jack up barge arrives at Western Port
16-Sep-10 Job opportunities grow from desalination green roof
6-Sep-10 Start of Tunnel Boring Machine 2 for Outlet Tunnel
27-Jul-10 Start of Tunnel Boring Machine 1 for Inlet Tunnel
Jun-10 Project named on Infrastructure Journal'sInfrastructure 100 list
May-10 Power infrastructure installation begins
26-Apr-10 Project named Desalination Deal of the Year at Global Water Awards
31-Mar-10 Project named Infrastructure and Project Finance Deal of the Year (Asia) by The Banker (Financial Times)
17-Mar-10 New Car Parking Facilities Funded by Desalination Project at Koo Wee Rup
11-Mar-10 Project named Global Deal of the Year and Deal of the Year - PPP (2009) at the Infrastructure JournalInfrastructure Awards
11-Mar-10 Project wins Infrastructure Partnerships Australia Financial Excellence Award
26-Feb-10 Thiess Degremont Welcomes Locals to Workforce 
10-Feb-10 Project awarded Australian & NZ Deal of the Year (2009) by International Financing Review Australia
8-Feb-10 Project named Best Finance Project Finance Deal in Australia (2009) by Asiamoneymagazine
8-Feb-10
Project named Best Finance Project Finance Deal in Australia (2009) by Asiamoneymagazine
6-Feb-10 New Community Information Centre opens in Wonthaggi
4-Feb-10 Project wins Asia Pacific Project Financing of the Year and Best Australasia Deal of the Year at EuroweekAsia Pacific Loan Awards
4-Feb-10 First pipe laid at Clyde North
20-Jan-10 Project awarded PPP Deal of the Year Asia Pacific (2009) by Project Finance International
23-Dec-10 EBA Signed for Victorian Desalination Project 
Jan-09 Offers of compensation sent to landowners on the Cranbourne easement
Dec-09 Offers of compensation sent to landowners on the pipeline and power easement
26-Nov-09 Project Summary tabled in Parliament. Project contract released
19-Nov-09 Syndication of debt completed. Government guarantee no longer required.
30-Oct-09 Independently Chaired Community Liaison Group meetings commence
30-Sep-09 Construction starts
2-Sep-09 Financial close
30-Jul-09 Contract awarded to AquaSure
28-May-09 Government announces underground power option preferred
27-Mar-09 Request for Proposal closes - bid assessment begins
19-Mar-09 Federal Minister for Environment, Water, Heritage and the Arts approves project under EPBC Act
3-Mar-09 EPA Works Approval Application approved
9-Jan-09 EES Assessment by Planning Minister announced
4-Dec-08 EES Inquiry Panel submits report to Planning Minister
Oct/Nov 2008
EES Inquiry Panel Hearing
30-Sep-08 Requests for Proposals for construction and operation issued to two shortlisted bidders
30-Sep-08 EES and WAA public exhibition closed
20-Aug-08 EES report and EPA Works Approval Application (WAA) submitted and exhibited for public comment
Aug-08 Formal Council Liaison Group meetings commence
24-Jul-08 Expressions of Interest closed
4-Jun-08 Invitation for Expressions of Interest to bid for project issued
4-May-08 EES Scoping Requirements released
19-Mar-08 Public comment on Draft EES Scoping Requirements
7-Feb-08 Commonwealth Government accredits EES process assessment under Environment Protection and Biodiversity Conservation Act 1999(EPBC)
28-Dec-07 Planning Minister announced EES to be undertaken
30-Nov-07 EES Referral submitted by DEPI
19-Sep-07 Government announces desalination project will be delivered as a PPP and Project Information Office opens in Wonthaggi
19-Jun-07 The Next Stage of the Government's Water Planannounced
Jun-07 Feasibility Study completed.