Past logging activities (1984-1992) above the National Park Reserve boundary have reduced upslope stability and resulted in bank failures in the upper reaches of Stream 3. Increased headwater peak flows and sediment input have resulted in channel aggrading, widening and a general loss of channel structure which has significantly impacted spawning and rearing fish habitat.
The Cheewhat Lake system supports populations of steelhead (Oncorhynchus mykiss), sea-run and resident Cutthroat trout (Oncorhynchus clarki clarki), sockeye (Oncorhynchus nerka), coho (Oncorhynchus kisutch) and chum salmon (Oncorhynchus keta), many of which continue to be important food sources to the local Ditidaht people. Escapement numbers indicate significantly reduced stock abundances since this mid 1980s. The Ditidaht people have expressed concern over the logging-related impacts which have resulted in reduced salmon abundances and potential ecosystem-level consequences. In partnership with other stakeholders, the Ditidaht First Nation wish to develop a comprehensive management plan addressing all aspects of logging and fishery resources within the watershed.