http://www.weatherzone.com.au/wa/goldfields/laverton#astronomy
With No rain what so ever in last few days, I don't see any reason why they can't start drilling.
Tue Apr 26: 0.0mm
Mon Apr 25: 0.0mm
Sun Apr 24: 0.0mm
Sat Apr 23: 0.0mm
Fri Apr 22: 0.0mm