In past years, Special Projects (DFO) have been constructing chum salmon spawning channels throughout the lower mainland region. Most have been groundwater-fed channels with no flow entering from creeks ( ... ). Two channels, on Lang and McNab creeks near Powell River and Gibsons, respectively, were open-ended, drawing water directly from the streams. Our habitat protection section okayed these projects, but then became concerned that the channels may decrease the overall productivity of the system and negatively impact on the wild trout stocks. In the spring of 1988, the fisheries section was asked to take a look at the Lang and McNab channels to determine if they were affecting the productivity of the natural channel by decreasing flows.
During August 8 and 9, 1988, the fisheries section studied the habitat quality of Lang Creek (both natural and man-made channels), species presence/densities, and water quality as it effects the system's capability to produce fish. Due to time restrictions, the McNab channel was not studied.
Clark, B. J.. 1989. Reconnaissance Report of Lang Creek and Its Spawning Channel, August 1988. Ministry of Environment. Lower Mainland Regional Fisheries Report. LM 159