Jeff,
Can you go into more detail on the green construction of two sand layers without pipe and why? Basic composition or particle size of the sand in each layer and depth or each layer, Bermuda or Bent? I am not setting you up for an attack, I love alternativa non USGA construction methods and have tried succesfully lots of alternatives in lots of different situations.
Randy,
The green construction method at Sagebrush was devised by Armen Suny.
Basically we cored out the green cavities as is normally done. There was a decision not use pipe or gravel, in part because it's very dry in central British Columbia. It would also have been relatively expensive and time-consuming considering the size of the greens at Sagebrush. They're massive.
To be honest, the sand layers aren't precise. Thinking back, we filled the cavities with about 12-18" of a dirtier sand then topped each green area off with about 6" of a cleaner, screened sand. (I'm not sure of the basic composition or particle size. If my memory serves correctly, it was a local sand.) Chicken manure was tilled/blended into this top mix after it was spread which resulted in more grading work than usual.
The greens were planted with a 3-4 different varieties of bents that Suny selected. None of the fancy new stuff either.
Last time I played Sagebrush, the course was just over a year old. Without any bias, I think they were the truest putting surfaces I've ever played on. Smooth and fast. I've always thought that it's going to be interesting to see the profile of these greens in, say, 10 years. What's going to happen inside those cavities without drainage? I don't know.
Suny isn't concerned; which is a good sign!