Haven't talked with the Seepage control staff, but I probably will as Spring comes along.
I have a new pond as well, all clay lined & packed. Filled really well during our first week of rain, made it to the top and held with just a trickle running in, and out over the spillway.
however, after a couple days without rain, the inbound runoff stopped and soon it started to drop. Lost 2-3 ft over the past week.
I'll give it some time to settle, pack in, and seal over the winter. With 30" of rain coming between now and May I'm sure we'll get the chance to fill & drain a few times.
Like to hear any other experiences of ponds needing some "settling" time before making a full seal. (or am I kidding myself ?

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