Wayne.B wrote:
On Tue, 16 Oct 2018 14:12:01 -0400, John H.
wrote:

We've had a lot of rain.

I bought a new post for the mailbox. Had Ms. Utility out to mark the
underground lines. The new post
needs to be back from the curb 24" to allow for 6" of space from the
street and 18" of mailbox. I
had a rod marking the location I wanted to dig. When I went out to look
this morning, the utility
marker had put a yellow line right through the spot I wanted for the
post. The gas line. Now why the
hell, given the USPS requirements, would the gas company put their damn
line right there? Jeeez!

But, here's the quandary. I need a hole 24" deep for the post. About 15"
down, I hit the new water
table from all the damn rain we've been having. Keep digging. Now I'm
down 24", but the bottom 8-9"
if full of water. I'm thinking if I dump a bag of sacrete down there
it'll just become soup. Ditto
with putting dirt down there. As the post and the mailbox are quite
heavy, it's got to be set pretty
firmly.

****.

===

Hydraulic Cement may be your friend:

https://www.thebalancesmb.com/what-is-hydraulic-cement-uses-and-how-to-apply-845076




One great advantage is it expands a tiny bit, so will lock into undercut
surfaces.