Several recent site visits identified  bunker sand overspray problems. Golfers cast about a handful of sand when they hit a sand shot and some of this volume ends up outside the sand bunker. Slowly, the bunker face thickens and this upsets the bunker floor and bunker edge transition grades resulting in more severe bunker edges.

Note the following overhead bunker images taken five years apart.

The bunker image on the left, taken right after construction, shows a well formed bunker floor/sand transition into the    bunker face. The image taken in 2012 shows how  bunker sand overspray has fattened the exposed bunker face resulting in a thicker edge transition, especially on the smaller, left side bunker. Note:Right image taken in winter.

In this case, I’d remove the sod facing the green, remove the accumulated bunker sand under the sod, then install new sod on the original subgrade loam. Next, I would tweak the bunker floor to insure a uniform 6″  bunker sand.