Coop Run on concrete - drainage / rain help

[JPenny]

Thanks for this, this is very helpful! We are actually moving soon and I’m hoping to do some of what you said here. We can pick out a place on our property that’s high and then you mentioned digging out 8inches? Can you help me with this? The coop will be sitting on all rock?
Could we dig down a bit and build the coop on blocks to elevate it (and also help keep predators from digging in)? See attached

View attachment 2766974View attachment 2766973

I did something similar to this. 8 inches of cinder block, about 1 inch above ground, and when it rains the inside of the coop stays nice and dry! I was so happy.