Strange basement issues, moisture [pics attached]
Some wall plates in my basement are partially submberged in the concrete floor. This is pretty confusing to me, did somebody pour a new layer of concrete in the basement after some walls were up? Not all the wall plates are in concrete though.
One of the wall plates rotted away and there are holes in the concrete and the stone that goes under the floor is exposed. There is water coming through there. I am planning to fill that in with some concrete, does that seem alright?. (see pics)
Also at one point someone cut trenches in the floor to add a drain, presumably because there seems to be a lot of water under the floor. These run to a sump, but a drain guy told me that one of them actually stops short so that is another thing to fix. What is odd is that at the seems of these patched trenches, there is always a bit of moisture (see pics). It never gets really wet, just a bit of moisture perpetually. This makes me worried for finishing the basement, seems like it needs to be remedied before being covered up. Not sure what to do though. Any thoughts or advice on this messed up basement would be appreciated.
Partially submberged wall plate (and another that is actually the opposite, on a raised section of concrete):
Where a rotted wall plate was and some spots are open to stones underneath, planning to patch:
A seam between two rooms that is perpetually moist:*
The cut and patched trenches for drain tile:
That's exatly what they did.
Most likly they had an unlevel, cracking messed up floor and tryed doing an overlay.
When you get to repairing, you will need a capillary break between the concrete and any wood in contact w/ it, even treated lumber. Otherwise, water will wick through the concrete and wet the wood. DryLok paint supposedly works, but gaskets are better; both is probably best. Have you ever checked the humidity down there? It may need to be reduced, too.
Everything you posted indicates you have a high water table under the floor. If you want the best protection against water damage in the basement, you're going to have to lower the water level, year round.
What is the high-water line in the crock look like? Can you take a picture?
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