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• <br /> 1 EXHIBIT A <br /> OREGON GUIDELINES FOR TIMING OF <br /> IN -WATER WORK TO PROTECT FISH AND WILDLIFE RESOURCES <br /> WATERWAY PREFERRED WORK PERIOD <br /> • <br /> Columbia T Region w <br /> Columbia River Estuary November 1- February 28 <br /> Columbia River (to Bonneville Dam) November 1- February 28, <br /> Youngs River & tributaries June 15- September 15 <br /> Lewis & Clark River & tributaries July 1- September 15 <br /> Walluski River & Tributaries June 15- September 15 <br /> Klaskanine River & Tributaries July 1- September 15 <br /> Bear Creek & tributaries July 1- September - <br /> Big Creek & tributaries July 1- September 15 <br /> Gnat Creek & tributaries July 1- September 15 <br /> Plympton Creek & tributaries July 1- September 15 <br /> Clatskanie River & tributaries July 1- September 15 <br /> Other Columbia River tributaries <br /> to St. Helens June 15- September 15 <br /> Sandy River & tributaries July 15- August 31 <br /> Tanner Creek & tributaries July 15- August 15 <br /> Other Columbia River tributaries <br /> (Sandy River to Herman Creek) July 15- August 31 <br /> Willamette River (Harrisburg to <br /> Willamette Falls) June 1- August 31 <br /> Willamette River (Willamette Falls <br /> to mouth including Multnomah Channel May 16- January 31 <br /> Milton Creek & tributaries July 15- August 31 <br /> Scappoose Creek & tributaries July 15- August 31 <br /> Clackamas River & tributaries July 15- August 31 <br /> Tryon Creek & tributaries July 15- September 30 <br /> Johnson Creek & tributaries (above <br /> Gresham) July 15- August 31 <br /> Johnson Creek (below Gresham) June 1- August 31 <br /> Johnson Creek (tributaries below <br /> Gresham) July 15- August 31 <br /> Kellogg Creek & tributaries July 1- September 30 <br /> Abernethy Creek & tributaries July 15- September 30 <br /> Beaver Creek & tributaries July 1- September 30 <br /> Tualatin River (below'Scoggins Creek) June 1- September 30 <br /> Tualatin River (above Scoggins Creek) July 1- September 30 <br /> Tualatin River tributaries July 1- September 30 <br /> Coastal tributaries south to <br /> Nehalem Bay July 1- September 30 <br /> Necanicum River & tributaries July 15- September 30 <br /> Nehalem Bay November 15- February 15 <br /> Nehalem River July 1- August 31 <br /> North Fork Nehalem River & <br /> tributaries July 1- August 31 <br /> ` Cook Creek & tributaries July 15- August 31 <br /> Salmonberry River July 15- August 31 <br /> 1 <br />