Mildew in grass bales

G'day folks,newbi from downunder.
We have just bought some acerage(2ac) and have several slopey spots,basicly it's not flat but workable.On some of the slope areas I want to put raised beds,the sides to be made of corrogated iron(although what the sides are made of is irrelevent) so anyhoo,I need to bulk the beds up substancially because of the gradient and have been offered a LOT of grass bales that were damaged in the floods we have been having down this way.Well there is mold on most of them as you would imagine,it's not all mouldy but it's there.Is there some reason or logic as to why I shouldn't use these bales to bulk up the beds.We plan to put heaps of horse/sheep/chicken manure on top with the final layer being mushroom compost.

The mould is that grey dusty stuff.

I really love this site and read it for hrs(Thats why I joined)Anyhoo,thanks for an informative forum.
Survegalist.

I used moldy alfalfa bales from a friend for raised beds around my pond.  Much they way you described manure and topsoil over the top and it has become a very fertile bed.
The alfalfa was too far gone for fodder and was free.

Thanks for your reply Robert,I've only ever used top quality bales befor and wasn't really sure.

Survegalist.

It's moldy because it's already started to compost. The only real issue is that you might want to wear a face mask while handling it - you could get a very large concentrated dose of spores in your lungs.