Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Instream Flow Study Guidelines: Technical and Habitat Suitability Issues

Publication number Date Published Date Revised
04-11-007April 2004January 2022
VIEW NOW Instream Flow Study Guidelines: Technical and Habitat Suitability Issues (Number of pages: 86) (Publication Size: 1801KB)

Trouble viewing? Try these free options.
Author(s) Department of Fish and Wildlife and Ecology
Description The Washington Department of Ecology (Ecology) is charged both with administering state water rights laws and the federal Clean Water Act Section 401 water quality certification. The Department of Fish and Wildlife (WDFW) is mandated to protect habitat, including streamflows. When a major water project is planned, WDFW and Ecology request that the project proponent conduct an instream flow study in consultation with the agencies to provide adequate information on which to base an instream flow recommendation or requirement. This document provides information on instream flow study guidelines.
NOTES Originally published 4/2004. Revision dates 2/2008, 4/2013, 3/2016, 1/2022.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact Water Resources Program at 360-407-6872
Keywords 401, guidelines, IFIM, study, instream flow, fish habitat
WEB PAGE The Science Behind Instream Flows