Anyone with knowledge on installing a 50ft x 50ft pond liner

Got the hole dug and liner on the way [60mil] need any info on installing it comes with and under layer //but it weighs 750 lbs and will have very little help so ideas please///if you live in SE Ariz and wish to help we will supply fac masks ND SANITIZER AS WELL AS SMOKED BABYBACK bbq  WILL BE INSTALLING ON THE 2SD OR 3RD OF JULY TO CATCH THE MONSOON RAIN..Really need ideas on making thhis as simple and effective as possible.
Thanks
Lou & Aggie

Hi Lou & Aggie and or Cougina.
I've done something like that. I hope they fold it so that you can set it up on one side of the pool, pull it off the axl, (we used a round metal scaffolding bar). So you pull it all the way to the far side and then flip it open to cover the left side of the pool and to cover the right side of the pool. Do you see what i mean?
We made a model first out of some sleepingbag or something, because we were talking endlessly and it can be really stressful to talk and understand what you want to say but because the matter is so foreign to our brain that you can't get the others to understand. And they have the same going on.

We were three to figure it out. And we had a video about how to not do it, by Butler. He had to redo it. Well avoid that. The good news is he did it alone and with his wife.
We were three, one couple and me.
The problem was, the factory had folded it wrong, so we had to find a big flat place close by and refold it. The farmer had a huge flat place we could use to fold it just right and lift it with the tractor and drive it to the edge of the pool.
Then we were five to pull it across, it went much easier than expected and their pond liner was a bit longer, 75 feet by 50 feet.
Then fold it open to the two sides was doable with three.
If you don't see what i mean, i can send pictures, but the poolowners are a bit private, so i've gotto ask if that's ok first.

It's a real big undertaking, don't underestimate it and work it out now, so you can properly explain the factory guys, who might any way think "Fuck it, we'll quickly fold it and bring it, not our problem..". Here they had said, of course we do it like that, we do this all the time! It took quite some puzzling to find out it was wrong in the first place, so you will want to avoid that situation when you have a crew waiting for you. And have the plan B ready for if the factory fucks up.

thank you i do understand and that is really helpful

I didn't see my neighbor putting the liner in.

What I do see is that he brought in a lot of really large rocks to hold the edges of the liner down while waiting for the rain to fill it.

This help the liner stay in place and keeps the wind from messing with it.

I converted  a 20 x 40 swimming pool, 10 ft deep end, using an epdm pond liner.
The liner was cheaper than filling the pool.
I had alot of surplus at the shallow end, less at the deep end.
I think my epdm sheet was 80 x 40.

I put in some big feed bags full of sand to create bottom structure, also some ledges with surplus patio bricks.
Around two sides I excavated a ~6x20x1.5 ft trench to become a biofilter marsh, with 1 ft brick retaining rim.
I used old tarps and pieces of the old liner as a base layer.
But, it is critical not to create a wate/gas tight pockets between the under layer and the liner, because decomposition gases can build up and bulge  the liner inside out.

After that I got a crew of strong people to help unroll the epdm from one end to the other, allosing it to sag and draw down to conform to the pond and the biofilter trench.
I wish now I had shingled a separate piece from the biofilters over the edge of the pond.
I trimmed excess and draped it over the rim to protect from foot traffic.
I refilled the biofilter with pea gravel which I should have washed better.
I weighted the edge over the rim of the pool with a trench full of pea grave but I wish I had used rocks, the trench is a stagnant nuisance

It all worked well, although a bit of a rush because the old pool was held up by water pressure, so I had to get it refilled before it collapsed.

Tomorrow I am installing a solar powered circulation pump, instead of the old pool pump I currently use.

Lots of dragonflies, toads, some frogs, mint, nice plants in the biofilter, and  a growing patch of water lilies.
Next I am going to try wild rice.
And, maybe ducks.