Myles said:
Thanks guys. Therein lies the problem. I really don't know how I'm going to get the last layer off the bedrock. So far in the part I have done I've got my hands and sort of waved the bedrock dirt into a pile but I'm not sure how effective it's been. Another problem is the bedrock will always be under the water level and there's no way I can empty it unless I use my WX15 but it will just fill in again. Maybe once it's all cleaned out and the dirt has settled I'll put some goggles on but I don't think it will take long to stir things up again. Maybe I could dam it.... Maybe the river will dry up... Probably best to go with a yabby pump... Any more suggestions will go a long way. in the meantime though I've still got about 15 cubic meters of dirt to move.
if you have an area of say 4 metres wide by 1 - 2 metres the other way thats all shovelled down to the bedrock then try using a broom and slowly pushing the loose material in to one spot and then shovelling out that too
if you can feel using your hands where there is an area that is flat , try pushing the loose stuff to that location and use a strong dustpan and brush to get the last bits coz that will have the best gold in it
bunnings have steel dustpans , or there are very heavy duty plastic ones that are supposed to be " unbreakable "
you might find a square mouthed shovel can be used as the dustpan too , and sweep into that
you will find the best technique is to sweep very very slowly when underwater , otherwise the turbulence will send the gold every which way
when you finish with the broom and dustpan , let it settle for a day then come back to see what you missed , any crevices or cracks in the bottom might have ten times more gold in those than what you got in your pan
when you finish "your housework" and are confident that you swept that area clean , then you can move on to the next section
if you want to know more about yabby pumps send me a PM and i will show you some pictures of hand powered crevice pumps i have made
good luck
keep safe
enjoy the exercise and happiness it brings