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Engineers in New South Wales, Australia are working to restart one of the three drilling tunnels on the already delayed Snowy 2.0 pumped storage hydro project after it was halted in December when a 30-ft-deep depression emerged about 100 ft above.
The tunnel boring machine is driving the roughly 10.5-mile headrace tunnel from the high level Tantangara Dam to an underground powerhouse. A second TBM will form the 3. 7-mile tailrace down to the Talbingo reservoir.