Na, most of the energy went straight up but the lake behind it disappeared downstream. Back then most ranchers had some dynamite floating around, you could buy the stuff through the local hardware store and any place that sold fertilizer sold 33-33 ammonium nitrate. My buddy had blown that dam 2-3 times before, it was my bright idea to use more goboom and be done with it. The authorities told us to tone it down a little, I believe the dam was back the next summer.