The soil in the creek bed behind the house is probably the best soil in Collin County. It is soft and easy to dig.  I appreciate the free donation from my neighbors at higher elevation.  I’m going to dig a little out and move it to the area where I want my new garden beds.  As a bonus, the depression I’m leaving should serve to slow the water down next time a big rain comes, so more ‘good top soil’ will settle in the area and provide me more.