Caught in action a Henke Parallel Lift Plow at work for Washington State DOT. Here’s their crew working on SR 504 near Elk Rock Summit east of Toutle. They work hard to plow and/or treat roads all over the state. They ask that motorists help them out by driving for conditions, giving them space and of course, always focusing on the road. This plow is on the Washington State Contract (available thru NorthendTruck.com) and is very popular across the US with many State DOTs and Municipalities.