 Drainage systems were implemented by various owners of the property, including the Truly Family, to modify the existing groundwater and surface waters.Because the construction of the UWB/Cascadia campus caused the destruction of 6 acres of a hillslope wetland ecosystem, the State of Washington had to mitigate this loss under the 1989 Federal Wetlands Delineation Protocol of the Clean Water Act.The State chose to restore the degraded floodplain to a high standard of function, at a ratio of nearly 10