Introduction <br /> The Department of Fish and Wildlife generally discourages <br /> in -water work because such work frequently destroys fish and <br /> wildlife habitat, degrades water quality, and infrferes <br /> with water - oriented recreation. The Department also <br /> recognizes that some in -water projects are necessary to meet <br /> human needs and that many activities can be conducted with <br /> minimal disturbance to the environment. <br /> To assist sponsors of in -water projects, the Department has <br /> developed a list of Oregon waters with recommended time <br /> periods for in -water work. There are a variety of important <br /> fish living in Oregon streams, such as salmon, steelhead, <br /> trout, and warmwater game fish, and each has its own <br /> critical states during the year. There are also a number of <br /> state and federally listed threatened and endangered fish <br /> species in Oregon. Projects done during the preferred time <br /> periods will result in the least damage to fish and <br /> wildlife. Preferred time periods may vary from year to year <br /> due to changes in climatic conditions and streamflows. The <br /> type of activity and method of operation may also influence <br /> the preferred work period. <br /> The following list of rivers and streams does not include <br /> all of the important fish bearing streams in the state. The <br /> listed streams includes their tributaries, even if not <br /> specified. For evaluation of specific proposals and <br /> information on permit requirements, individuals should <br /> contact the nearest office of the Department of Fish and <br /> Wildlife. <br /> (, <br />