Here are some tips on what to say. The more personal your letter, the more impact it will have!

• Impacts on endangered species - The area is home to rare and endangered sea turtles, dugongs, snubfin dolphins and in the path of migrating humpback whales. Dredging will destroy the seagrass habitat that dugongs and turtles rely on for food. It will also create a muddy plume that could spread for many kilometres, potentially affecting the marine park and nearby coral reefs.
• Impacts on the Caley Valley Wetlands - These wetlands are of international importance for birdlife, supporting up to 40,000 waterbirds including many rare and threatened species. Dumping dredge spoil near them risks overflow, sediment spread and contamination. Wastewater will almost certainly infiltrate the delicate wetlands.
• Risk of cyclones and floods - The dredge spoil disposal ponds will be on a low-lying coastal plain adjacent to the coast in a tropical area prone to cyclones. The risk of flooding and overflows during heavy wet season rains, storms or cyclones is high.
• Impacts of increased shipping - There are currently around 174 ship visits to Abbot Pt. This is expected increase by 560 ships at full capacity. This vastly increases risk of reef damage from ship wreck and pollution.