Dock

>>1071133
Every property around me has at least one pond.
One thing they have in common, rickity docks.
If you just want like 2-3 years, wood supports will work.
If you want something that will last, do solotubes and concrete.

They're just cardboard tubes of various diameters and lengths that you can buy at home improvement stores (only one use).
Buy 4'x9" tubes
Dig hole.
Stick bottom of tube in it.
Level all tops of tubes to same height.
Fill with concrete (add reinforcement if you can).
Drill concrete for brackets after it cures or put anchors in before it sets (I put anchors in first).

>>1072240
*Sonotube
Sorry.

/diy/ hates the water they are a land folk

>>1072240
You will need a longer tube than 4 ft. You probably want 4 ft in the ground/ below grade. Then based on hwm go up. Remember you will need to calculate the buoyancy forces acting on the platform vs friction of foundation pile. The pile should also be able to not be pulled out but the boat. Also ice buildup under the dock is a consideration. I have professionally been involved in large harbor and dock designs but the same principles apply.

>>1074155
You will and should calculate in an engineered way all the forces and materials to use.w without soil data I could not say exactly how deep you should go.

You're a scrub Zack.