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Delineation of Ordinary High Water Marks & Ordinary High Water Lines
Hosted by Northwest Environmental Training Center

This course is intended for River and Wetland Scientists, Biologists, Hydrologists, Surveyors, Engineering Consultants, Permit Reviewers, and anyone else who makes Ordinary High Water Mark (OHWM) and Ordinary High Water Line (OHWL) delineations on aquatic shorelines. The OHWM is a cornerstone of public trust responsibility and essential to protection of natural resources on rivers, lakes, and marine shorelines. The OHWM is an ecological boundary delineated by scientific methods using field criteria (water, soils, and vegetation) set forth in federal and state statutes.

The class is designed to educate attendees on comparative OHWM/OHWL delineation techniques using standard indicators. Discussion will include new developments and emerging methods for using online hydrologic data, StreamStats, and on-the-ground soil survey techniques. It includes documenting and defending current delineations. This will be a two-day course with one day of lecture and discussion followed by a day of hands on delineation exercises in the field.

Registration: $495/$395* earlybird pricing for registrations received by November 13, 2009, $545 ($445 reduced rates*)
You may register via the link below or by calling the Northwest Environmental Training Center at 206-762-1976. (*reduced tuition is available for Native American tribes; government employees; nonprofits; students; and NAEP, NEBC, NWAEP members).
For general information contact Eldan Goldenberg by telephone at 206-762-1976 or via e-mail at

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