Restoring aquatic ecosystems and habitats is not yet an exact science.  Inter-annual variability within complex and changing natural systems, land conversion to less desirable uses, development of new technologies, and changes in water allocations are examples of unpredictable situations that may arise throughout the life of a restoration project.  Therefore, best management practices are required to allow project adaptation, in order to achieve the desired outcomes and maximize healthy impacts for salmon.  Best management practices allow project managers the ability to assess what works and what doesn’t within a given situation and the flexibility to make informed decisions that improve project results.