I've noticed at Harding Park that the edges of many of the greens feature a noticeable rise - 1/2" or 1" - up to the level of the fringe. If you put your foot on it you can feel a little ridge. It makes it a bit harder to putt from the fringe because your ball is quite likely to be airborne as it jumps off the ridge and drops down onto the green. It's almost like there's a little curb on the edge of parts of many greens.
David Tepper and I came up with two theories:
1) Something in the underlayers of the greens settled over time, lowering the level of the green edges below the soil level of surrounding area.
2) The ground was graded correctly, but the greens were seeded and the fringes were sodded, which added 1/2" to 1" to the soil base of the fringes but not the greens, creating the uneven transitions.
Does anyone know which is correct, or if something else is going on here? I can't recall seeing this condition at any other course I've played.