Ac c e p te d P r e p r i n t This article is protected by copyright. All rights reserved 1 Original Article Integrated Environmental Assessment and Management DOI 10.1002/ieam.1781 Potential Risks to Freshwater Aquatic Organisms Following a Silvicultural Application of Herbicides in Oregon’s Coast Range †† Running Head: Aquatic Organism Risk from Silvicultural Herbicides Jeff Louch*†, Vickie Tatum‡, Ginny Allen†, V. Cody Hale§, Jeffrey McDonnell‖, Robert J. Danehy†, George Ice† † National Council for Air and Stream Improvement, Inc., 720 SW 4 th Street, Corvallis, OR 97333 USA; tel. 541-752-8801; fax 541-752-8806; email jlouch@ncasi.org; gallen@ncasi.org; bdanehy@ncasi.org; gice@ncasi.org ‡ National Council for Air and Stream Improvement, Inc., 402 SW 140 th Terrace, Newberry, FL 32669 USA; tel. 352-331-1745; fax 352-331-1766; email vtatum@ncasi.org § Nutter and Associates, Inc., 360 Hawthorne Lane, Athens, GA 30606 USA; tel. 706-354-7925; fax 706-354-7928; email chale@nutterinc.com ‖ Global Institute for Water Security, 11 Innovation Blvd., University of Saskatchewan, Saskatoon, SK S7N 3H5 Canada; tel. 306-966-8529; fax 306-966-1193; email jeffrey.mcdonnell@usask.ca * To whom correspondence may be addressed †† This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: [10.1002/ieam.1781] All Supplemental Data may be found in the online version of this article at the publisher’s website. This article is protected by copyright. All rights reserved Submitted 30 May 2015; Returned for Revision 28 March 2016; Accepted 28 March 2016