Thought I would share my latest project since I have gotten so much help from this forum and hopefully this might help someone else. Little history. I have a 3/4 acre pond that has leaked for about 7 years. I have drained and reworked and that helped but still leaks.I think I know where it is leaking so I bought one unit of soil floc from TJ but haven't had time to get it down. If that doesn't work I think I will do the same thing I did on this project.
Current project history:
I bought a used skid-steer about about 5 years ago and decided I should test it out and decided to dig a small hole in the bottoms about 40 ft from a creek but the creek is about 10 ft lower. Not the best place to dig a pond but with a new toy who cares right? Well about 7 ft I hit a foot of sand and then water table. It has never held since it was built. Couple years ago I thought since it was leaking in the bottom I would just line the bottom thinking the upper soil was better. It worked great where I put the 40'x60' black/grey tarp from Menard's but would drain down to top of tarp. I let it go for awhile and let the frogs take over but this year I decided to try to line it all the way up with billboard tarps. I used HH-66 glue that I bought from this site to glue the seams.http://www.sailrite.com/HH-66-Vinyl-Cement-Gallon
After all of the work I have done on it, it ended up being about 90'x90'. The tarps I bought off Craigslist. I originally thought it would take 12 but ended up only using 9. At $30 bucks a piece that's $270 plus about $100 in glue and 3 inch paint rollers. Total of $370. The tarps are about 15'x 50'.
They seem pretty tough and held up well with the skid-steer running them over during the burying process. Straight back and forth no spinning the machine. I did raise the water level more than I thought I was going to because it looked better so some areas the water is above the tarp. With that being said it might seep out in those areas but so far it seems to be doing really well but its only been full a few days.I am posting a link to the pictures I took so you can see the results and steps that were taken to install them. http://s645.photobucket.com/user/jason7858/library/Small%20Pond%20Liner?sort=9&page=1