From the Parks website, in case anybody is planning to visit Mt Sorell (I assume), Darwin or South Darwin this summer:
"To facilitate exploration activities and ensure public safety, the Darwin Plateau Track (used to access the Darwin Plateau and Mt Darwin) will have restricted access.
Works are expected to continue over the summer period and an update will be provided upon completion and subsequent reopening.
Please note this closure does not affect the Bird River Track, Kelly Basin Walk or the permit only Mount McCall Track."