"Winston" wrote in message
...
Hi all,

Here's a question from one of our rec.crafts.metalworking pals.
Help him out if you can, please?

THX. --Winston

"I drove my (new to me), big, diesel backhoe over the last tank in my
two-tank septic system. Still, not too smart but I thought that I had
cleared it by a foot or two. NOPE! So, one of the rear tires fell in
the
hole, not all the way but it competely broke the concrete lid on this
concrete tank.

Now, not only being dumb but being cheap, too, I want to make my own lid
of
about 6 inches thick and about 4 feet in diameter.
I have only worked with concrete just a bit by pouring it into some holes
for a few t-posts and a few vertical landscape timbers.

I do have a small (unused by me) concrete mixer.

Do I simply lay out some plywood on solid ground, build forms around it,
put
in some welded wire and some rebar and pour away? Yes, I will keep a
center
hole open and install some hooks to lift it on the tank.

Does this sound like a plan?

Thanks

j/b"

Did you break the top of the tank, or just the lid? If you just broke the
lid, you can use thick visqueen, and a temporary support under it, and pour
yourself a lid that will match the other one perfectly.Lay the visqueen in
there and fill it with water so it will take the form of the plug. Wetvac
out the water being careful not to pull the Visqueen out of place. Being a
metalworker, make a pattern of rebar in there, and a horseshoe shaped
lifting eye. Weld it all together. Let it cure for about a week before
lifting. Lift, peel off the Visqueen, and next time ............. It is
also a very good idea to take a grinder and score two marks, one on the lid,
and one on the tank so that if you do have to pull it again, you can put it
right back in the exact orientation.

Steve, from r.c.m.