My older brother and I used to dam up the creek in the woods near our house (what did you think I meant?). The woods were hilly so the creek was swift. The soil was heavy with clay and perfect for plugging spaces between the “boulders” we would tumble into the water to form our makeshift dams. It was so much fun! We loved making the dams; but even more, we loved destroying them (hey, we were boys!) and then…