David E. Johnson, P.E.   JOHNSON ENGINEERING LLC

P.O. Box 4087 Soldotna, Alaska 99669 ● (907) 398 2670 

Education:

·        B.S. Civil Engineering, University of Minnesota, Institute of Technology 1976

·        Additional Studies, Environmental Engineering, University of Alaska, Anchorage

 

Professional Registration:

·        Registered Professional Engineer Minnesota 1980

·        Registered Professional Engineer Alaska 1984

Experience Summary:

Mr. Johnson has worked in Alaska designing, inspecting and regulating the installation of onsite wastewater systems for over 27 years, both in private practice and in public service. In private practice, he has performed hundreds of percolation (perc) tests, designed dozens private and commercial onsite wastewater treatment and disposal systems, and has written numerous soil reports evaluating the suitability of soil and groundwater conditions related to the installation of onsite wastewater disposal systems.   

Mr. Johnson joined the Alaska Department of Environmental Conservation (ADEC) in late 1990 as an Environmental Engineer and served as engineering section manager for the Onsite Disposal System Section from 1997 until 2006, when he became engineering lead for ADEC’s large mine permitting section.  Over the past 27 years, Mr. Johnson has accumulated a vast experience base related to wastewater treatment and disposal all across Alaska, particularly with respect to evaluation of soil and groundwater suitability for construction of onsite wastewater soil absorption systems.  Major accomplishments during his tenure with ADEC include:

• Re-writing the Manual for Installation of Onsite Wastewater Systems that provides statewide regulatory guidance for sizing, in-situ testing (perc test), design and installation of onsite systems for Alaska;
• Reviewing literally thousands of onsite wastewater engineering plans, including site, soil and groundwater suitability to assure regulatory and permit compliance;
• Serving as technical engineering lead for several special projects including development of an interactive training cd that instructs homeowners on how to install their own onsite wastewater system;
• Re-writing and re-structuring the State of Alaska Wastewater Disposal Regulations (18 AAC 72);
• Managing the statewide certified onsite wastewater system installer program, including training, enforcement and program administration;
• Providing statewide quality control/quality assurance for engineering plan review work and supervising engineering staff in all five program offices across Alaska.

Prior to joining (ADEC), Mr. Johnson spent 9 years in private practice in Alaska, designing and providing construction inspection services on projects ranging from multi-million dollar road and airport improvement projects to single family onsite wastewater system design and evaluation. He has authored dozens of subdivision soil investigation reports required by platting authorities to verify that a proposed subdivision is suitable for onsite wastewater disposal. These investigations involved test hole excavation (augered or excavated holes) visual evaluation and identification of subsurface soil and groundwater conditions, in-situ testing (perc tests) of soil and preparation of a formal report summarizing findings and making recommendations.