Takeover talk circling Dacian, says Financial Review, page-29

Interesting Article nk. Makes sense that a company commits on the basis that they have done due diligence and are confident of profit.
Apart from monitoring ASX announcements does anyone have any ideas on how you would keep up to date with which miners are committing to mine construction or processing plant development?
Intentions do not always come into fruition however so at what point is construction considered to be going ahead - feasibility stage or mine contractor tender or cap raising?
Or do you simply look at when company goes out to tender for mining construction services? If so, does anyone know where to look for this information...
Would be happy to hear any perspectives on this....