Stream restoration projects require a variety of tools and tactics. Sometimes you use a trowel, and sometimes a bulldozer.
In trout and salmon streams where water quality or habitat are highly degraded, you are more likely to need the latter. But when you bring in the heavy machinery, what happens to the fish living in that section of the stream?
Often, the project manager is required to relocate as many of the resident fish as is possible before the work begins. The goal is to cause as little harm as possible to the fish and to ensure that none remain in a stream channel that has had its flow diverted, as was recently necessary for the Faith Valley Restoration Project.