teejk
Veteran Member
- Joined
- Mar 3, 2012
- Messages
- 1,775
- Location
- Merrillan, WI
- Tractor
- JD 2020, IH CC 1250, Ariens 926 Snowthrower
Kinda depends on soil and "gravity" I think...the concept is older than you or me...it's not brain science/rocket surgery (might have those mixed up). We have a lot of new factors on how they work but respected the concept has not change (and I don't buy the anti bacterial hand soaps thing because a single taco night will over come that).Mine is old circa 1978 and is a single camber 1200 gallon concrete...
Some around here are very old and made of redwood...