Dave Derrick, Potomologist, Stream Stabilization Specialist, & VP for 20 years with River Research & Design, Inc., Vicksburg, MS. 

Mr. Derrick retired with 35+ years of experience as a Research Hydraulic Engineer with the Corps of Engineers.  Dave has worked in 49 states teaching, designing, & building projects, ranging in size from the Mississippi River to small farm ditches (smaller is harder to design)!!  Dave has also invented several environmental uplift techniques including Half-Drowned Bushes, Wrong Way Boil-up Pools, Living Dikes, Hydraulic Cover Stones, Slant T Angle Slams, “Missing Tooth” Stone Transverse bars; “Roof Rocks, Locked Logs, “Squeezers”, and "Dense Fibrous Root Replication".