the Board said they had doubts about the viability of the...

the Board said they had doubts about the viability of the Ballarat mine

here's a key quote in the November 2011 announcement

"The Board has therefore determined that it is necessary to curtail activities outside of the core focus of accessing and mining the Mako Lode in the Llanberris compartment in order to demonstrate whether or not there does exist at the northern end of the prospective Ballarat goldfield sufficient mineralisation to sustain a profitable modern mining operation."