Large Pond Build (150' Dia, 8' Deep) in Sand: Research Resources

Wants 150-ft diameter, 8-ft deep pond for koi/fishing. 3' topsoil then sand. No liner preferred. Asks help/resources.

Beyond My Expertise

Large earthen ponds in sand require geotechnical engineering. Bentonite clay amendment, compaction, possibly synthetic liner.

George's links page — search for large pond construction, clay lining, bentonite.

Consult a pond-building engineer. Not a DIY project.

Pond and Water Gardening: Building a Pond: The Absolute Essentials for a Healthy, Leak-Free Water Feature; Aquatic Carnivorous Plants for Ponds in Extreme Climates; Building a Patio Pond: Step-by-Step Guide; Crystal Clear Pond Turns Milky: The Berry Connection; Emergency pH Crash in Koi Pond: Crushed Coral, Baking Soda & Root Cause; First Winter Pond Care: Kansas City Zone 6 Guide; Filling In Unwanted Ponds: Relocating Frogs Humanely; Building a Large Clay-Bottom Koi Pond in South Texas; Why Aluminum Is Toxic in Ponds and Safe Alternatives for Plant Shelves; Building Solar-Powered Pond in California: Liner, Filter, Plants

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