Kathleen Harrison, P.G. QSP, QSD, QISP, ToR, REA

Kathleen Harrison is a Principal Geologist based in California with more than 30 years of experience focused on watershed management, stormwater pollution prevention, and erosion control. She is a significant contributor to water resource projects across the United States.

Kathleen Harrison is a Principal Geologist based in California with more than 30 years of experience focused on watershed management, stormwater pollution prevention, and erosion control. She is a significant contributor to water resource projects across the United States.


From municipal and industrial clients to energy companies to providing litigation support, Kathleen’s clients depend upon her in-depth understanding of industrial, construction, and municipal National Pollutant Discharge Elimination System (NPDES) compliance, permitting regulations, and stormwater best management practices (BMPs). Kathleen is actively engaged in the changing IGP NPDES regulations and helps client's develop cost-effective strategies to achieve compliance. She is a member of the California Storm Water Quality Association IGP Sub-Committee and was selected to be on the SWRCB's IGP Training Team. She was instrumental in developing the SWRCB's training program for the IGP's Qualified Industrial Practitioner (QISP), where she co-chaired development of QISP training content, developing the QISP exam with the SWRCB, and updating the training for the new TMDL and on-site and off-site compliance requirements.

Kathleen leads multi-disciplinary teams in site investigations and project implementation related to project planning and permitting, watershed protection and stormwater management. She has been the lead author of multiple environmental assessments, environmental impact statements, and environmental impact reports in accordance with the California Environmental Quality Act and the National Environmental Protection Act (CEQA/NEPA). Kathleen assist clients prepare and negotiate regulatory permits including California Department of Fish and Wildlife 1600 Streambed Alteration Agreements, U.S. Army Corps of Engineers nationwide and individual 404 and 408 permits, and Regional Water Quality Control Board 401 Water Quality Certifications.

Kathleen has managed numerous projects with the objective of identifying risk or mitigating impacts associated with natural disasters and development. She has managed post-fire mitigation for over fourteen large fire events in the southwest U.S., including the devastating 2007 San Diego County fire storm – identifying and prioritizing risks due to increased runoff and erosion. She managed a 12-person team to evaluate facility-specific risks and vulnerabilities associated with predicted El Niño on regulatory compliance, operational interruptions, and/or materials/manpower resources at 23 industrial sites. She managed a team of 30 people to complete an Order 1 Soil Survey and Seismic Refraction Survey along a proposed 20-mile pipeline corridor in rugged isolated national forest lands to identify unstable soils to mitigate construction impacts.

To advance the state of the practice, she also has developed and conducted training courses related to post-fire mitigation, NPDES compliance, including stormwater BMP evaluations and inspections, documentation requirements, erosion and sediment controls. She has been a senior reviewer or lead author on numerous NPDES compliance documents including water quality technical reports, jurisdictional urban runoff management plans, and storm water monitoring plans for industrial, municipal and construction clients.

Contact Kathleen Harrison at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-619-297-1530.

Career Summary of Kathleen Harrison, P.G. QSP, QSD, QISP, ToR, REA

  • Specialties: Watershed and Stormwater Management; Water and Natural Resources Conservation and Restoration; Surface Water and Groundwater Supply Studies and Development; Erosion and Sediment Control
  • Practice Areas: Water and Natural Resources
  • Disciplines: Environmental Sciences, Hydrogeology, Water Resources Sciences
  • Education: B.S., Geologic Sciences, Western Washington University, 1985
  • Registration: California Professional Geologist, 6316; Wetland Delineation and Management Training Certification, U.S. Army Corps of Engineers; California QSD/QSP Storm Water Certification, 01150; California, Registered Environl Asses, CA 4016

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