Block Dust aka Chat?

[Momofthewild]

Same thing.....from wiki description I linked:
" RCW consists of the twigs and branches of trees and woody shrubs, preferably deciduous, including small limbs up to 7 cm. (23⁄4 in.) in diameter. It is processed into small pieces by chipping "

Is this the depth of hole? How big in diameter is it?
Does water ever come out of it?
If dry I guess I'd just leave it filled as is.

Yes that's the depth. It's probably about 4x4 wide I'd say.

 

[Aunt Angus]

it smells like sour cream and cheddar chips

 

[aart]

Yes that's the depth. It's probably about 4x4 wide I'd say.

That would be 4x4"?
Is it wet?
Any wetness in the run needs to be fixed,
how to do so depends on where the water comes from.

 

[David61]

I wouldn't take much of anything out of a hole. If its level with the other ground you are starting with big deal as compost is goingon top. It will just get worked in the mix. Get your tree service chips. Put them down 2" a week while adding as much or what you can of leaf litter, grass chippings, dirt, pine straw, hay...