I’d be absolutely amazed if this stand hasn’t had a firm project managing it..
I also doubt if MC or JM will have had much knowledge on construction, and would of thought they would of had some outfit doing the management side of things..
I seem to recall some talk on here about a firm who were managing it though.
The bottom line is … if you employ a company to build you a stand… you expect them to do it to a good standard…
Questions will undoubtedly be asked about how it was ever signed off, with the electrical and water problems that have now arisen..

Water and electric demand are predetermined and reinforcement of infrastructure and switch gear is processed well in advance of a project. Either someone has got the calcs wrong or there is a fault somewhere.

There's a third option, the builder in order to improve their profit margin to deliver the project on time and within budget has taken shortcuts and cost savings such as installing 63mm mains supply instead of 90mm

If that's the case then they're bang to rights, and its not a quick or cheap fix. Depending on the alignment it could be quite disruptive and they’ll dig up that lovely new car park.

The mains supply should've been signed off by Yorkshire Water.

I'm neither confirming or denying this is the issue, but if the existing mains was 63mm it would have cost a lot to replace it, also the old mains was delivering most of the water to ground level and 1st story, now it needs to go up considerably higher requiring a greater pressure, 90mm will allow 70% more pressure than 63mm.
My expertise is more of the electrical side of things and I believe that issue was a much simpler and cheaper fix as the capacity of the site is similar to what it was prior to the upgrades, the LED floodlights use around 50% less power than the old discharge ones (and deliver around 30% more lumens), which means that capacity was available for the main stand.

Regarding the water, I understand your point in respect of the up lift in height. But the players changing rooms and toilets are all ground level. Plus as I understand things after the Bradford game the players had to shower in the old changing rooms, so obviously no problem there. I didn't hear about any water problems in the boxes either. Right at the start of this new stand costs were cut, the rain screens were the first to go.

I blame statler and waldorf

Are the showers fed from the mains or from tanks located on the upper floors of the new stand?
When I was at the barrow game I took up the offer of the hospitality at £30 to check it all out, I was extremely disappointed at my findings, I have resisted posting on here all the things I see wrong with the build as didn't want to be associated with the "Negative posters brigade" but fi I was Matt I would be absolutely flippin livid at what's been done, so a simple "for instance" why is the bar and toilets on the pitch side of the stand, they should be on the car park side, with as much glass and natural light coming in from the pitch, the quality of the internal fit is sub standard, I think a DIY'er could have done as good a job the bar is simply not big enough, the main room is too small, should be 3 times the size with the ability to partition off smaller areas as and when needed (as is the case with similar facilities). I could hear running water all the time, so there was a leak somewhere and where will that water be going? There was plenty more wrong with it but I don't want to go to town on here as I'm sure ME is on top of sorting these things out.

Sounds like we would have been better off employing you to project manage it, FT ??
Is it possible to switch things round and do as you suggest, or does the structural design prevent that from happening ??

TBH I was a project manager for 2 years for a £760m turnover electrical distributor, where I looked after 3 of the largest electrical contractors in the UK, I project managed the lighting for the institute of sports facilities for the commonwealth games stadiums in Manchester (Now man city's stadium and sports village) during its construction, this would have been a lot simpler.
As for changing things around, I believe it can be done but at massive inconvenience and cost, it would have been a fraction of the cost to have had it right in the first place.