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The northeast end of Cheewhat Lake, down to the National Park boundary, was logged in 1984, with sections of the east side logged between 1986 and 1992. Resulting bank failures above the National Park boundary have significantly impacted spawning and rearing fish habitats in the lower reaches of streams 1 & 2 (Wright,
2002). Anadromous populations of coho (Oncorhynchus kisutch), chum (Oncorhynchus keta), sockeye (Oncorhynchus nerka), steelhead (Oncorhynchus mykiss ), and resident and sea- run coastal cutthroat trout (Oncorhynchus clarki
clarki), are well documented within the watershed. Harvesting has resulted in increased peak flows, channel widening, aggrading, loss of channel structure and significant erosion and sedimentation (Wright 2002). These effects are negatively impacting fish production in this system by reducing the availability of high
quality rearing and over-wintering habitats and smothering spawning beds.
The basin site was chosen as it was already a depositional area where Stream 2 lowed and lost definition, breaking into a number of braided channels. The old spur road also provided good site access. This site was also the location of the avulsion that creating a new connection to Sprise Lake, allowing cutthroat to colonize this area where previously no fish were found. By constructing the basin and berm at this location, the historic isolation of the Cheewhat and Sprise systems could be re-
created.
Musial, Brandalyn, Wright, Michael C.; Askin, Bob. 2010. Cheewhat S2 Sediment Catchment Basin Construction, August 2009. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2010MR008
Topic: FLNRORD Research Program
Keywords: Forest, Investment, Account, (FIA), British, Columbia
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