Erosion and Sediment Control

Soil erosion, and its resulting sedimentation, has the ability to cause widespread damage to waterways and impact drinking water quality, endanger wildlife resources, and hinder the flood-control capacity of lakes and reservoirs. For the most challenging projects and construction programs, Geosyntec has extensive experience developing effective stormwater pollution prevention plans (SWPPPs), erosion and sediment (E&S) control and re-vegetation plans, hydrologic and hydraulic models, and designs for stormwater best management practices (BMPs).

In the United States, the U.S. Environmental Protection Agency (EPA) has determined that erosion and sediment (E&S) control is a serious challenge to the nation’s developers, municipalities, and agriculture. Construction general permits now require E&S control for all land disturbances greater than one acre and many developers face serious fines from state and federal regulatory agencies if found to be in non-compliance with construction permit requirements.

Our practitioners are leaders in the development and implementation of cost-effective soil stabilization measures on land affected by surface mining; linear utility and pipeline construction; and transportation, power facility, and residential and commercial development. We have expertise in alternative delivery, bid-build construction, and in developing solutions that minimize cost and environmental impacts. Geosyntec also is an industry leader in developing and directing post-wildfire disaster remediation.

Additionally, our construction audit services assist large commercial and residential developers to ensure they are in compliance when implementing and documenting E&S control measures in their region. We develop SWPPPs and E&S control plans that enable clients to meet their compliance obligations quickly and effectively.

Geosyntec engineers and scientists develop state, federal, and international training programs for E&S control contractors and stormwater inspectors and many of our practitioners are Certified Professionals in Erosion and Sediment Control (CPESC), Certified Professionals in Storm Water Quality (CPSWQ), or Certified Erosion, Sediment, and Stormwater Inspectors (CESSWI). Furthermore, our practitioners maintain comprehensive knowledge of E&S permitting requirements, often consult in the development of new regulations and implementation guidance, and also lead training for public agencies, inspectors, construction personnel, designers, and attorneys on the latest requirements and newest techniques for E&S control and construction stormwater practices.

Advancing the State of the Practice

As recognized leaders in the stormwater and E&S control industry, our practitioners actively participate in organizations that educate, shape, and inform environmental policy and practice around the world. Through their participation in the conferences, as certified instructors, or membership on the boards for Envirocert International, StormCon, the International Erosion Control Association (IECA), the American Society of Civil Engineers (ASCE), and the California Stormwater Quality Association (CASQA), the engineers and scientists of Geosyntec continue to be at the forefront of new research, techniques, and education methods in the field of E&S control.

Our practitioners also author and serve as advisors for guidance manuals and BMP handbooks that present methods used throughout the construction industry for E&S control and the controls for other construction-related pollutants including: the State of Oregon Department of Environmental Quality Statewide Erosion and Sediment Control Handbook; the CASQA Stormwater Best Management Practices Handbook Portal: Construction; the Illinois Urban Manual; and the Missouri Department of Natural Resources Protecting Water Quality Field Guide. They also supervise the operation of the Soil Erosion Research Laboratory at San Diego State University and regularly contribute to articles, industry journals, and present at academic conferences around the world.

Lead Consultants

  • Ganesh Krishnan, P.E., D.WRE, CPESC, NCEES
    Ganesh Krishnan is a Senior Principal Engineer based in Georgia with more than 20 years of experience focused on water resources and geoenvironmental engineering. Ganesh specializes in design engin ...
  • Mark Ellard, P.E., CFM, D.WRE, FDEP
    Mark Ellard is a Senior Principal Water Resources and Environmental Engineer based in Florida with more than 25 years of experience in diverse watershed management, water quality assessment, and st ...
  • Kim Williams, P.E., CPSWQ

    Kim Williams is a Senior Consultant Water Resources Engineer based in California with more than 20 years of experience focused on civil and environmental engineering.

  • Kathleen Harrison, P.G. QSP, QSD, QISP, ToR, REA
    Kathleen Harrison is a Principal Geologist based in California with more than 20 years of experience focused on watershed management, stormwater pollution prevention, and erosion control. She is a ...
  • Ken Susilo, P.E., CPSWQ
    Ken Susilo is a Senior Principal Water Resources Engineer based in California with more than 20 years of experience focused on urban stormwater management. Ken specializes in the development of mul ...
  • Brian Hitchens, P.G., CHG
    Brian R. Hitchens is a Senior Principal Hydrogeologist based in California with more than 15 years of experience focused on the evaluation and improvement of groundwater and surface water impacted ...
  • Tom Fendley, P.E.
    Tom Fendley is a Principal Environmental Engineer based in Georgia with more than 30 years of experience focused on civil/infrastructure design, construction engineering and contract administration ...
  • Eric Smalstig, P.E.
    Eric Smalstig is a Senior Principal Engineer based in California with more than 25 years of environmental consulting experience focusing on industrial facilities (production and waste management) a ...
  • Thomas Bristol
    Thomas Bristol is a Principal Scientist based in South Carolina with more than 18 years of experience in environmental consulting focused in the areas of environmental regulatory compliance; ecolog ...
  • Alan Fowler
    Alan Fowler is a Senior Principal based in New Hampshire with more than 25 years of experience focused on the assessment and remediation of contaminated sediment. Alan is a recognized expert in the ...
Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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