Since 1958, there has been four research ponds at the farm: Insect pond, Squire pond, Doc's pond, and Upper pond. These ponds drain to a ravine and into the Chagrin River. They were designed by Dr.

Mark the outline of the shelf with sand or string. Dig out the centre of the pond and either add additional shelves, or dig until the required maximum depth has been reached. Check each shelf is ...