The maintenance staff is currently renovating a few bunkers that are unplayable during the winter months. Many bunkers have original sand that is now 15+ years old and has become contaminated. Our process includes; removing the contaminated sand, replacing drainage, and adding new sand. These photos are from the green side bunker on #6. The photo of the bunker after renovation was taken after 1" of rain.
This photo is of #6 green towards the end of the December cold spell we encountered in the Willamette Valley. Many golf courses were frozen for two weeks or more with lows in the teens. As temperatures warmed above freezing it began to rain. With the soil profile still frozen, this was the result for two days.
Luckily, we had very little turf damage. I believe this was due to healthy turf and not allowing play on the greens until the entire profile had thawed.