Every depression in the fairways at Pacific Dunes is drained; there are more of them than Bandon, I think, because a lot of the ones at Pacific are smaller.
We have always hated the look of the green drain caps on modern courses, it's one of the reasons I've always tried to avoid subsurface drainage at all. But when Bandon Dunes was being built, they found out the hard way that they couldn't count on the drainage just perking into the sand.
Our answer was the "star drain" -- perforated tile which doesn't daylight at the surface, but is buried about a foot or two down to suck the water down once it penetrates the soil. This won't work very well on heavy soils but it works like a dream on sand. [In a couple of cases it worked too well and sucked sand straight into the tile, but most of the sand in Bandon is coarse enough not to do that.] Instead of just a drain cap on the end of the tile, we branched out into four or five so the tile underlies a larger area at the bottom of the depression. There are a few drain caps at the fringes of the course, where we didn't think anyone would notice them.
In all, there's about $400,000 worth of drainage under Pacific Dunes. Most of the credit for the system goes to Jim Urbina and Dave Wilber, and to Jeff Sutherland [now the superintendent] who helped make sure it all went in correctly.