I think I may have shown you this photo before. this is the western-most end of the lake at Roundrock. This is where all of the water pouring down the Central Valley enters the lake bed. Notice all of the rock in the ground. They’re all trying to make their way into the lake, and they’re succeeding.
Where I was standing when I took this photo there were boulders that were too large for me to lift. They weren’t there when the lake was first built. They were pushed there by the force of the water that comes down the Central Valley sometimes. The first thing all of these rocks encounter when they enter the lake bed is Libby’s Island. Some have begun piling against it, which isn’t so bad since my original worry was that the island would get washed away by the incoming water. Most of the rocks are being directed around the north side of the island where they are accumulating like a loose, gravel lava flow.
The water that you see is not connected to the lake. It is actually a scour pool that has formed. It is about twenty feet long and perhaps three feet deep at its deepest and, happily, it has stayed around from week to week. I feared that all of the gravel at this end of the valley would mean that the area couldn’t hold water, but it appears that it can.
I suspect that some of this washed-in gravel is actually returning home. When the lake was constructed, the man on the dozer pushed all of the gravel from the area farther up the valley. I don’t know why he did that. He had to have known better. He made a sort of dam with the gravel across the dry stream bed. You can now stand on the bedrock where he had made this gravel dam because in the ensuing years, all of the gravel has been washed away by the water.
So I have gravel washing into the upper end of the lake. It’s another thing I’m resigning myself to accept, and I don’t mind so much except that it means that Libby’s Island is never really going to be an island.
- Young bald eagles beging fledging.