
Reservoirs Maintenance
Sediment provides an environment for bacteria, protozoa and viruses to thrive, and depletes chlorine reserves. Removing the sediment reduces the need for continual increases of chlorine, and enables you to deliver the cleanest, healthiest water possible to your customers.
We can provide the solution to all your needs, whilst maintaining strict hygiene standards
We can provide the solution to all your needs, whilst maintaining strict hygiene standards
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Removal of all material in the tank, including sediment, sand, and coagulated materials
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Underwater leak detection
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Repairs to exposed re-bar, concrete spalls, or internal plumbing
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Cathodic protection system maintenance and repair
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Inspections of the ventilation screen and hardware
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Inspection of the hatches
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External and internal coating inspections
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Ladder removal & Replacement
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Isolations
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Valve replacement
Harcan Marine has dedicated potable water reservoir cleaning equipment to avoid cross contamination. Our cleaning equipment has been designed inhouse to be efficient to minimise turbidity. Our divers have working at heights and confined space entry certifications to aid in maintaining our 100% safety record.
Our divers complete training via Queensland Water Directorate (qldwater), the key advisory and advocacy body within Queensland’s urban water and sewerage services industry.
Harcan Marine works with Councils and Treatment plants all over Australia. One of our clients recently has been internationally recognised as silver winner of best tasting tap water in the world!






Reservoir Cleaning Repair Case Study
Mackay Regional Council – Reservoir Cleaning & Inspections
📍 Mackay, Queensland |
Scope of Work:
As part of a long-term contract with Mackay Regional Council, our commercial diving team carried out essential maintenance, cleaning, and structural repairs on potable water reservoirs. The project included:
✔ Sediment Removal – Safe extraction of 50mm to 300mm of accumulated sediment to maintain water quality.
✔ Structural Repairs – Removal of concrete spalling and internal structural modifications using jackhammers.
✔ High-Pressure Cleaning – Water blasting of intake grates to improve flow efficiency.
✔ Visual Inspections – Comprehensive internal and external condition assessments to identify damage or potential risks.
✔ Component Replacement – Installation of new ladders to enhance accessibility and safety.
✔ Roofing Repairs – Restoration of damaged sections to maintain structural integrity.
Outcome:
Through proactive maintenance and expert repairs, we enhanced water quality, reservoir longevity, and compliance with safety standards, ensuring uninterrupted service for the Mackay community.
🔹 Need professional potable water reservoir cleaning & maintenance? Contact us today!