The Pit River will quadruple in size this weekend on a 9 mile stretch. As part of their licensing conditions for operating hydroelectric plants along the Pit River, PG&E is required to provide whitewater flows periodically. The practice is intended to replicate the inconsistency the river would have if it weren’t dammed. Saturday the current flow of about 400 cubic feet per second will increase to 1200 CFS. It’ll then gradually recede to the previous level by the end of the day. PG&E says the flush will create class 4 and 5 rapids that are appropriate only for skilled paddlers.