This pond started out with the top ring we removed from the ag-catchment tank. The tank was too tall for it to capture water off the new barn's roof. I saved the ring figuring that it would come in handy one day. Well, it's finally "some day".
A while back we built stairs down the from the house to the lower field. At the base of the stairs is a dry seasonal creek bed which is "dead" because a landowner above us bulldozed and contoured his land, thus destroying the dry bed as a rainwater runoff channel. With the creek bed safety deactivated, we decided to built a footbridge across it and make a pond underneath the footbridge. Now the saved catchment tank ring has come in handy.
Last week I stopped into the water catchment store on my way back from Kona. Just stopped on impulse I guess. Came out with a catchment tank liner. Ok, now I had a job. Today, after letting the liner warm up in the sun, it got spread into the ring thusly.........
It's not quite smoothed and stretched enough yet for filling, but it's almost there. But it rained for a few minutes, putting "first water" into our new pond. So, it's on it's way!
This is as far as we got. Running water to it for filling will be another day.