Make sure you don't alter flow of water to your neighbours. I know you had ponding issues in the past. Did you permanently solve them?
Civil is not my thing but my rudimentary understanding has load placed on saturated ground pushing up an equivalent weight of water. The pool could exacerbate standing water issues.
I feel more like typing so will discuss the mystery.
About a dozen years ago a competitor asked for my help in resolving an issue with a snow melting system he installed. Call him Kevin.
A homeowner with an existing system got Kevin's name somewhere and told him his driveway snow melting system stopped working. Keven gives him a price and gets the job to replace it. The pavers are lifted, the new cables installed and pavers replaced, all to industry standards. It snows and the new system doesn't work either.
The cables power up to the correct amperage at 240 volts but the snow doesn't melt, defying the laws of physics. No one including me or the manufacturer can find fault with the installation.
"Kevin" puts in boost transformers...nada. Kevin modifies the cables to increase power...nada
After about six years of piddling around the system starts working again without any new modifications.
A couple of years earlier, while on site scratching my head over the problem, I was admiring the McMansion next door. Then I went to streetview and back in time.
About the time the problem started the McMansion wasn't there. It was a dinky old house on a big lot in a prime location, McMansion wannabe.
I speculated the cause to be an underground spring that got diverted and water cooled the snow melting cables to the point they didn't couldn't do the job. I've only seen it once before at a freezer plant built on swampy ground. In the spring the frost barrier couldn't keep up, we figured for the same reason.
As GG suggests the McMansion could have been squeezing the water out of the new build and affecting the performance of any system. It's IMO more likely than the underground stream.
About Kevin.
When he got the original call he failed to consider that there were four cables in the driveway. Unless there was a catastrophic event, cables don't fail all at once.
I suspect that simple load or resistance test would have shown the original cables meeting spec. Instead the home owner paid five figures to replace the existing cables with new ones that didn't work. IMO the old cables were far superior to the new brand. Mercedes vs Lada.
Logic, do they teach it anymore?
