Proposal to manage dredging spoil as a valuable resource for the betterment of Cairns

community and economy.

DRAFT 04-12-12

By:Norm Whitney

&Peter Senior

1. Ports North propose dredging the Trinity Inlet Channel and dumping this spoil near our reef.

2. Dredging spoil is potentially a valuable resource that should not be treated as waste.

3. Ports North, some of its advisors and some Brisbane bureaucrats consider it acceptable to dump huge quantities of

spoil near our reef - most Cairns residents disagree.

4. A more logical and longer-term approach is to use this spoil for projects that benefit Cairns economy and community.

5. CRC is the correct body to direct assessment of options for this spoil, and decide optimum action for the benefit of Cairns community and economy.

KEY POINTS

Ports North plan to ‘…enhance cruise ship visit numbers, involve dredging a broader and deeper entrance channel to allow port access for larger cruise ships and upgrading berth infrastructure within Trinity Inlet.’(Ports North AIS report, July 2112)

Ports North propose dredging ‘5,073,600’ m3 of spoil and dumping this at an extended area near the reef out from Yorkeys Knob.

This proposal presumably meets Ports North imperative for least cost and compliance with State Government "directive or policy".   

do YOU really want 5+ million cubic metres of spoil dumped near our reef?

Even if some bureaucrats in Brisbane approve the extended dump site,

Dredging spoil is a valuable resource.

There are numerous opportunities to use this massive amount of spoil to benefit Cairns’ economy and community.

Question: If spoil is a valuable resource, would it make sense to dredge out more than the minimum amount proposed by Ports North?

This could avoid ‘introducing some tidal constraints to access by the cruise ships’* as well as doubling the amount of spoil for projects using this spoil for the betterment of Cairns.

* Reference: Ports North AIS report, July 2012‘This iterative design process allowed a reduction of channel dredge volumes from 10,058,000 m3 to a final dredge volume of 5,073,600 m3. This reduction in volumes was achieved through the optimisation of channel width and more critically by establishing a channel depth, that while introducing some tidal constraints to access by the cruise ships, achieved significant dredge volume reductions.’

Just one indication of the value of spoil:

Portsmith commercial area was created using dredging spoil from the Trinity Inlet.

A deeper channel could allow larger liners such as Queen Mary II to dock at Cairns Cruise Terminal, and allow great flexibility for arrival and departure times for other cruise, naval and commercial ships.

Imagine filling Cazalys Stadium with 5 million m3 spoil.

250 metres deep

Eiffel Tower 320 metres

…. Or having 15 million m3 of this potentially valuable resource available for on-land projects in Cairns!

750 metres deep!Eiffel Tower 320 metres

Cairns would have had this magnificent resort at East Trinity, opposite the cruise terminal.

But the Queensland Labor Government withdrew approval. A still-secret negotiation resulted in the NatWest bank being paid, it is thought, as much as $25,000,000 of YOUR MONEY in compensation.

The next photos show what over 10 years of gross mis-management by State and Federal government departments has produced.

East Trinity, 8 years ago.

East Trinity, November 2012.Note the dead melaleucas.Spoil bulk-fill could assist fixing this environmental disaster.** Reference: 1995 Brannock report on East Trinity, Page 5.6: 'The results of the geotechnical investigations are present in a background report (Golder Associates 1995)…It is evident from this analysis that the composition of the material will form an engineered fill of sufficient quality for most, in not all, the bulk fill requirements of the East Trinity site.'

Imagine you’re a Chinese tourist, or a visitor with an RV,or a local resident, which would you prefer? This or…

Graphics by local artist, Csaba Sreder

An even better Esplanade beach than Townsville!

Plus an RV-Park,

Parkland, and

a quiet bird -watching area

Who should ensure Cairns economy and community get the most out of this massive amount of valuable resource?

Ports North imperatives are least-cost and compliance with State Government directive or policy; their dredging proposal includes 2 years for an EAS assessment, then only 8 months to dredge the channel.  

Only our representatives on Cairns Regional Council can lead, expedite and make the most of this once-in-a-lifetime opportunity.