Waste water and sewage.

Health departments do get pretty particular with permitting lagoons even in the rural areas. Most have to have a 2'-3' high berm around them. There needs to be a 3-1 drop from the out line to the lagoon. Requirements here for a 1 bath 2 person residence are 10' wide 20' long 3' deep and a 2' berm. As far as working with 3 feet of ice, lol it would not work here as it would be frozen to the bottom. That being said yes they work when covered with ice as the discharge pipe is in the center sitting 12" to 18" off the bottom, but rarely will we get more than 4"of surface ice. It is also the pond you don't want your dogs to jump in either