Fern Ridge Lake lies behind Fern Ridge Dam, near Veneta, Oregon.  It has a somewhat muddy bottom, so the color of the water.  Along the eastern shore to the left side of the lake here, there is the Fern Ridge Wildlife Area, where I have spent many enjoyable hours.  A variety of migratory birds stop here at various times.  There is a birdwatching platform in the midst of the area.
More information about the wildlife area is here:  http://www.dfw.state.or.us/resources/visitors/fern_ridge_wildlife_area/index.asp