Mr. Cox is a graduate of the University of Tennessee at Knoxville in Civil Engineering. The previous professional experience of Allen includes employment with Texaco, Inc., the US Army Corps of Engineers (Memphis Branch), a Tennessee-based construction company and Memphis Light, Gas and Water Division.

Mr. Cox joined DIPRA in 1981. He is a registered Professional Civil Engineer in the State of Tennessee and a AMPP (Formerly NACE International) Corrosion Specialist. He is a member of the American Water Works Association (AWWA), American Society of Civil Engineers (ASCE) and the Water Environment Federation (WEF).

This talk presents the results of case histories of some of the oldest installations where gray cast iron and/or ductile iron pipelines were installed using polyethylene encasement as a means of external corrosion control. Investigative procedures included soil testing, excavation and physical inspection of exposed pipe sections and laboratory testing of the polyethylene material. Included are the testing results and the location of each investigation. The investigations demonstrate the effectiveness of polyethylene encasement along with its most up-to-date generation V-Bio enhanced polyethylene and how this will allow a pipeline designer to implement a safe and sustainable design. Also, the audience will be introduced to the Design Decision Model (DDM).