Using Field Indicators for Hydric Soils

WA State Department of Ecology/The Padilla Bay NERR


Wednesday, October 4, 2017
9 a.m. - 4:30 p.m. CDT

Mt. Vernon, WA, United States

CM | 6.50

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This class will teach you how to effectively use the Hydric Soil Indicators in the Regional Supplements to the Corps of Engineers Wetland Delineation Manual. You will learn the basic processes that take place in saturated soil, and how to “read the story” in a soil profile. The training includes an introduction to identifying layers, distinguishing concentrations and depletions, and preparing hydric soil descriptions from soil profiles. Each student will have a chance to describe soil profiles and apply the field indicators to their notes.


This workshop will be indoors, with an exercise in the field. Please dress appropriately. (6.5 CM AICP Credits/ CEP Points)


Required class materials to bring:

  • A copy of the Munsell Soil Color Charts and one of the following publications:
  • The Corps Regional Supplement for Western Mountains, Valleys, and Coast Region, or Arid West Region. They can be found at:
  • Or The Field Indicators for Hydric Soils (updated version 8.1) This can be found at:
  • a sharpshooter or tile spade style shovel (if you have one)
  • soil knife
  • tape measure
  • spray bottle for water (if you have one)

Lunch is provided.

Resource URL


Bob Thomas

Bob Thomas is a biologist and soil scientist for the Army Corps of Engineers, Seattle District, Regulatory Branch Branch. He has extensive experience in the Pacific Northwest in routine delineations, delineations in disturbed areas, and problematic hydric soils. Mr. Thomas has been teaching hydric soil and delineation workshops to professional ... Read More

Contact Info

Cathy Angell,