1. The Braemar Iron Alliance represents several companies exploring the Braemar Iron Formation in South Australia, which may contain up to 50 billion tonnes of magnetite ore. 2. Developing the deposits would require transporting large volumes of iron concentrate, potentially over 50 million tonnes per year. 3. Key infrastructure challenges include developing sufficient rail lines and wagons, a slurry pipeline to transport concentrate, a new deep water port capable of loading very large ore carriers, and overcoming the higher sea freight costs from shipping from South Australia versus Western Australia.