Megh Ale (pronounced “Ah-lay”) is a patient man. His eyes twinkle, the corners of his mouth almost always turned up into a soft smile. He was a monk before he started his rafting, adventure travel, and river conservation endeavors. Patience is a virtue in Nepal if you are a river conservationist. But a sense of alarm is also there in Ale’s face and voice. Nepal has about 6,000 rivers and streams, and every single river is dammed, except one. That’s right — one.