Thank you, SQLGuru, your advice made me reexamine the board and the possibilities with a new understanding...It became clear to me during this scenario, with your advice, that the water filled grain hexes were not an option. It is for me, six weeks into my serious effort to learn the game (with the help of very patient mentors, btw) a combination of trying to tie together the various related, tangential rules, that seem magically to come together at the moment of decision to thwart/destroy me......a common experience I imagine for similarly slow Newbies. I find that when the game presents something new to me such as SSR authority, from a SK 2 perspective, I do not yet have the overarching ASL worldview which allows experienced folks to intuit when rules or SSRs might provoke this or that action. At this point, I'm still desperately grappling with just trying to remembering resids, the pluses and minuses of CX, moving acquisitions, what a k/2 means, backblast, and Making Advance Ph Great Again.
Remember, it always looks darkest just before everything goes pitch black.