Limestone walls seems like the cheapest, fastest, easiest way to make the stadium look loads better. Like doing a tasteful upgrade on rims for the hooptie.
We've been over this before. I seem to remember someone saying something about foundation issues, maybe a low water table. Anyway, they said building the foundation for it would be alot more time consuming and costly than you would think. There's alot more to it than someone just piling up some limestone and grout as if they were building a limestone fence on their property. For the amount of $$$ it would take, there are better upgrades that could be made first and the $$$ spent would have alot bigger impact on something functional.
I'm not saying I know, just saying I remember this has been discussed and that's what I remember without going back in the thread.
there's not much required for a foundation for the proposed limestone wall even if the the capacity of the soil is terrible. Want evidence? Have we had to fix any settlement issues with the lower part of the seating bowl or the field...no.
It would still likely require a frost footing, say 24" x 36". That is, unless the current toe footing at the base of the railing is adequate, but I doubt.
No frost required, one side of the wall is not a temperature controlled space. Freeze thaw damage will only happen if drainage system is crap. Soil over the heel or toe of the footing is to prevent overturning when required and this wall is not tall.
huh, looky there.

Frost footing is required. Has not so much to do with temperature control, but the fact that if you do not bear below the frost line (accepted as 36" in Kansas) then frost could heave the wall and cause it to fracture and deteriorate. Examples of such as seen below

This is what I imagine the wall would look like. Approximately 5' above grade, on a footing, with a trench drain along the seating side to collect water. CanConfirm did a lovely architectural rendering for me.

Dood, the weight of the wall would resist any heaving if the subgrade was properly prepared. The footing in your drawing just gets around subgrade prep. I'm an SE. They could also drill and epoxy the wall footing to the base of the seating bowl, and it wouldn't ever move.
Ps-the footing in your wall detail does not meet the ACI minimum requirements for reinforcement
My buddy the SE who detailed the 2 walls above disagrees. What's heavier, that wall or a building. But the building still needs a footing, right? So that argument makes no sense. Frost is amazingly destructive. If a cold winter sets in and the frost sets in good, you will see sidewalks, slabs, walls, etc. all over begin moving and cracking. We did a job a few years ago where the frost later heaved the sidewalk outside the main entrance even though it was doweled to the footing. We had to cut it out and replace a section of sidewalk so the doors could open.
As I said in my first post, if the existing footing is sufficient, yes, you could simply build on top of it and dowel the wall to the turndown wall on the riser.
And yeah, my reinforcing is still being detailed.