I guess there's a reason I have water on my mind. Today was really exciting for me, I felt like it was Christmas!
Until now we've dealt with clusters of mismatched 500 and 1000 gallon tanks inside the 6000 psi trench that runs the front-most width of the parking deck. The concrete trench is wide, almost 20 feet deep, and was built for the purpose of carrying the huge weight of our drinking water, gray water, and waste water tanks. The trench is capped at ground level with steel road plates.
Today the first nine of our order of 75 vertical water tanks arrived!
The new tanks are 5000 gallon behemoths that are each almost 9 feet wide and almost 15 feet high. As we remove the remaining old 1000 gallon tanks, the new tanks are being placed in rows of three.
Eventually there will be 25 rows of three tanks extending away from the parking deck, each with access rows of about 3 feet running between tanks.
We have to be super careful with lowering the tanks…they are quite heavy, leveling them, and then connecting the new plumbing. We are slated to complete the work before Halloween if there are no serious delays. The steel plates are only removed as needed, and once each set of plates is replaced, we start filling the tanks directly below if they are tanks designated for fresh water. This way, we never have a diminished capacity in case Murphy's Law decided that the day we had less water, was the day the SHTF! From the lower level access entrances, we’ve been working on cleaning up the trench and adding new LED lighting for about a month, so hopefully we won’t be working in the dark at any point?!
Clair, just thinking about your long term water problem, I don’t recall if I ever asked you about the PSI (Pounds per Square inch) of your poured concrete. I believe you need to use a PSI exceeding 4400 PSI to have non‐permeable (waterproof) concrete. I know there are probably lots of ways to waterproof the floor of your sinkhole, but if you can afford it and the water is really mostly coming from below, that might be one of your easiest options. Pour, float, pour, float and eventually you'll have a good floor. But I could be wrong, I'll check with one of the engineers and see what they think. I've seen a lot of concrete poured, but I don't want to steer you wrong!