Started a dry stack retaining wall around the edge of the pond this week end. Set large concrete slabs down for the footer and backfilled with #9 river stone. Wall will set about 24" high. Hope it holds. Only time will tell.
Nice looking project! I notice on your site plan, you indicated in the pond pumps. I think you may want to go with out of the pond pumps for many reasons. For the volume of water you will be moving for the stream, waterfalls, and the length of your run to the bio filter requires a pump with a lot of capacity involving lift/Gal per hr. Out of the pond pumps are utilized on commercial size ponds, because of their capacity, longevity/repairable, cost to run/check the amp ratings. For your liner needs, I would recommend www.btliners.com. If you plan on doing Koi, for over wintering, you should have an area of the pond that has a depth of at least 4 foot. If you can go deeper, say 6 foot all the better. Don't know what your winters are like! I have a 6 foot area and have not lost a Koi due to northern Michigan winters. If you want to pick my brain for info, advise.
Charlton John,
Unless you have a sustainable source of water from an upper elevation you will need a pump to recirculate. I did look at wind mills to use as a pump but, it just got a bit too complex for me and was not enough for my needs. As Pat32rf stated, read through the forum on Pond Boss. This will give you a good idea of the type of conditions and area needed to create a good pond along with different types. Other things to think about is what you want in your pond. For me, I wanted a water garden and lots of Koi which creates a different set of criteria from other type ponds. As an example, I want the water as clear as possible to see the fish and water plants. Most people will say you want to direct run off to your pond to keep it full but, for me it is the opposite. I want no run off. My pond is feed off of a spring that keeps it full. Run off would only make it murky and susceptible to contaminates. Post some pictures and there are enough people on this forum with pond experience that will give you some excellent recommendations and ideas on how to construct.