Mr. Coffman is the pioneer of Low Impact Development (LID) technology and is considered one of the nation’s leading experts on urban stormwater management.  He has over 35 years of experience in local government dealing in all aspects of stormwater management and receiving waters protection.  He also has a national environmental consulting firm and has worked for the last six years in land development and providing educational services in LID technologies and program development.   He is one of the founding members of the non-profit Low Impact Development Center, Inc. an important LID national technical resource for governments and the development community.  He has authored numerous papers, articles and manuals on LID and urban stormwater management.  He was the principal author and architect of Prince George’s County Maryland’s national award winning “Low Impact Development Design Strategies, An Integrated Design Approach”  for  Urban Stormwater Management.  He pioneered the innovative stormwater management practice of bioretention or “Rain Gardens”.  He is a scientist, educator, consultant and inventor.  His latest inventions are Filterra and Bacterra commercially available advanced bioretention systems to treat urban runoff.