Bobby wrote:

I need to pour a concrete pad 4X4 ft to set a ramp to a dock on. The
pad will be in a very steep dirt bank with tree roots. About how deep
should it be and should one use re bar or wire mesh?

I have no experience in doing this- but I think you'll need to expand
a bit if you want real help. . .

Riverbank, lake bank, pond bank? Maine or Florida? Sand, Gravel,
clay? Want it to last a year- or 50?

What purpose will it really be serving? as an anchor to the dock, or
a sundeck?

Jim