Large well needs a cover

We have a very large old well on our property that we use for water.  It had a cover that was handmade by the person who built our house.  He made it out of wood and it has since deteriorated.
We had the well cleaned but do not know how to cover it.  When I look for well caps and covers they show tiny types.  Our well is approx six feet in diameter.  How do I find someone who can cover it with something that will last longer than wood?

I would make another one out of wood and cover it with rubber roofing material.  It isn't too expensive and UV won't break it down for 30 years or more.  It will keep the wood dry, so it should last for the foreseeable future.  Forgot to add, I did that with a large bird feeder I made 5 years or more ago and the wood under the rubber roofing looks as good as the day I bought it.  I got the roofing material out of a dumpster and glued it to the wood with a liquid nail type product.

When we built our well house we painted it inside and out.  It has four side with one side screwed on so we can open it up and also handles on two side so we can lift it off if we want.  It has a tilted flat roof, again painted on both side then covered with tin roofing, the same as on our roof.

It looks really nice because it is the same colors as our house.  We also did the same thing for the water storage.

Know anybody with one of those old satellite dishes? Maybe on craigslist ? That would make a nice frame to start, then cover it with something like pond liner.

Depending on the aesthetics:

a. A piece of concrete reinforcement mesh covered with polycarbonate or metal sheet

b. A frame bolted together from steel or aluminium (lightweight) angle with either polycarbonate or metal sheet riveted to it. This would be easier to install hinges and locks on.

If made properly they should hold an adults weight = safety.

I have many old wells on our farm, and we just "reduce them down", kind of like how a reducer on a pipe goes from 2 inches to 1-1/2 inches.

In my grandfather's day, he poured concrete, but today you can buy well covers that are 4 feet in diameter and then have covers that fit over them with man holes. They are to heavy for kids to lift open, and can be chained for extra security.

Of course you can just make your own well cover with manhole out of concrete as well.

Everyone who owns land with old wells on them rather owes it to society to secure them. Partly from liability. While in the State of Maine I am free from an procecution from a hunter or something stumbling onto my land and tumbling down one of the many wells that are here, I still in good ethics should permanately try to stop such an incident from happening.

But a hand dug well is also an opening into our aquafer, the more it is sealed from surface contaminents; the better!

Good thoughts Travis.
But I am intrigued that you are exempt from hassles if somebody falls into one?