I played today as well . . . when I saw the signs of how much water was running down the canyon, I was little surprised that much of the course is still there at all. I think JoeP has it about right with damage; no greens and tees were damaged, some surface sand/silt on some fairways, and the left/first fairway on 7 is sleeping with the fishes (actually buried is more like it.)
The drainage which runs lengthwise down the middle of the course has reshaped itself, but fortunately pretty much kept within its old secondary borders. What used to be a 2' x 2' main trench snaked around quite a bit, and now appears to be 15' x 15,' in a few places, completely gone in others. Almost all evidence of the fire within the course has been washed into the Pacific and/or buried.
It rained 5+ inches the night of the flooding and the water had no place to go but down canyon (just like the putts), and the canyon goes up many miles. With the recent fires, sand and debris came with the water, the bridges and narrow spots plugged, sand settled out, and so it continued. I think there must have been a river, over 150-200 yards wide in places, running down the canyon. The wash looks different than it did before.
Obviously the bridges in the wash and some of the walkways across the wash did not fare well, but the cross-paths have already been repaired and the bridges repaired/replaced.
One correction from JoeP's post. I am pretty sure the hillside on 7 did not collapse. There are a few scars from old slides, but no new scars that I saw, and I looked for this specifically. Believe it or not, the foot plus of sand was deposited by the river as it ran through. There is a side canyon which drains in right there, and a couple of bridges to get plugged up, so that is a place where the water could get quite wide.
They've already worked the ground on the 7th fairway, and will probably reseed in the next week, after they pick the rocks and rake the sand.
The sand coverage on the other fairways is relatively minor. Dragging, scraping, blowing, shoveling should take care of it.
Most of the bunkers are fine and dry, although a few on the less sandy side do have some standing water.
Back tees on 18 were closed today, most likely for safety of the workers. It looked like they may have been doing some work on the dirt path across the fairway.
Overall, the course plays fine, with the exception of the drive on seven, of course. The greens are in terrific condition and were running fairly well. And a few wear spots in the fairways seem to be recoving well with the break in play. No carts on the grass for a while which is always a good thing.
In the long term, I think this will be good for the course, but no time for that now.
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JakaB. Anyone who thinks 7 needs ten more yards is either very confident in their own abilities, or they mistook the blue tee for the black. What good would a risk-reward option be if only a few could rationally take the risk?
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JoeP, I almost always play left on 7, but I am not good enough to trust my ability to make the carry. And I do so knowing that I have virtually eliminated the possibilty of making a birdie, though. Moreover, given the half blind shot and green contouring from the left, I think even good players greatly diminish their chance of a birdie from the left. The approach is much easier from the right, except with a couple of pin placements. This is of course nothing anyone could figure, without multiple plays down both sides.