Certifications and Licenses

Certifications Performed

Aquatic Expert Witness Work

Douglas R. Ferrell, a principal with Patrell Engineering Group, Inc., is nationally recognized as an expert in the swimming pool and waterpark field. His expertise in the aquatic field includes hydraulic, structural, suction entrapment, and waterpark design issues. His extensive field and design experience, over a career of more than 30 years, makes him a valuable asset for any team.

Competition Swimming Pool Length Certifications

Patrell Engineering Group, Inc. has special expertise in the survey of competition swimming pools for record certification as prescribed by U.S. Swimming. We understand what is needed to certify your pool. We have certified over 200 pools for competition, including numerous NCAA Division 1 schools. National records have been set in pools we have certified for competition.

Virginia Graeme Baker Suction Certification

Patrell Engineering Group, Inc. is experienced in what is required to certify main drains and special booster suctions. We specialize in the engineering certification of unblockable grates and field- fabricated sumps. We understand how to implement the regulations contained in the applicable ASME Standards and have helped many navigate these new, and very important statutes.