You may also want to ensure you have enough freeboard above the spillway to account for wind & wave action or a heavy rainstorm event. The water color is beautiful.
I’d take the walnut out, if it was me. I’d also bring that swale farther up hill or make a terrace up hill. Either way I’d make it much larger, I’d put it on contour, and give it a large, level spillway away from the dam. If your spring seepage is slow, a contour swale up hill would charge the ground water flow. I’d make the emergency spillway substantial in size just in case. Did the primary spillway have an anti seep collars around it?
I'm afraid your building method of raising the walls off the ground may not be the best idea. That looks like it is going to cause problems when you get high winds because when they can get underneath the walls that could cause a severe amount of lifting which could prove disastrous to your canopy. Sorry to say this but it just looks like a bad idea. You want to block out the wind especially under the walls.
I had one of those tents and, guess what, had the exact same problem. Mine ended up going through three major repairs until the last storm just blew the heck out of it. They are great - if you consider them a temporary structure.
Good and simple reinforcement job. That will definitely beef stability up. If you don’t mind, I have 1 idea/suggestion: If you’re looking for a little added insurance of the wood not wearing through the tarp fabric over time, I’d put either glue-on or peel-and-stick foam sill gasket on the tarp side of the wood. (I think it’s usually pink and about 3 1/2 “ in width) It’s dirt cheap, comes in good sized rolls, it’s thin (3/16”) so no added bulk and easy to work with (cut to size, shape). It also has the bonus of being waterproof and can protect the wood from condensation where the wood contacts the tarp fabric. Just an idea.
I have a 1973 International Cub Cadet 149 with a tiller on it and I love it, the seed bed is perfectly tilled and flat when tilled with it, it tills 5 inch deep too.
I flew to PA last week seeing couple customers. Looking down from the airplane, PA was so beautiful with so many farm houses up and down hills surrounded by trees. You did really well with the tractor, I love doing tractor works. I wish you and family the best.!
