Well I'm making some progress

Standpipe was installed on 6/6.
Depth of water at this point is a little over 3 feet - not bad considering we receive virtually no runoff into this pond. Not a bad thing if and when the pond fills - should stay clean/clear I hope.
We've had 2 real hard downpours since the standpipe was installed and all I've noticed is a little cloudiness to the water coming from the "Spring" pipe. There was on old hand dug well about 200 from the pond. We dug above this and installed some corrugated/perforated drain pipe and then transitioned to the 4" SDR 35 you can see near the dock piers. I plan on trimming the piers down to the proper height for the dock and then attaching the SDR pipe to the piers.
My biggest concern right now is a small spring seepage - my pictures aren't the greatest but the seepage is located near the
red flag. I haven't got the level out the check yet but I think this seepage is at about the 5 foot water mark.
Questions:
1) Should I try to seal this? I'm concerned once/if the water rises above this the flow will reverse direction.
2) If I try to seal - when and how? Seems that the water will want to just continue pushing out right now. I could still get a small dozer in there and pack some clay on it.
3) Dock Piers - should I seal around those? It seemed there was a layer of soft rock below the clay surface and then more clay. When we dug the holes the filled with water pretty quick so I had some seepage from somewhere.
Thanks in advance to everyone who replies. There are some great minds and friendly folks on this site.
Yes - it was foggy in western PA this morning and not bad focus on my camera....

