AT BIRCHBANK (1983 – 2005)Water Quality Monitoring Agreement • March 30th, 2009
Contract Type FiledMarch 30th, 2009The Columbia River watershed is located in the southeast corner of British Columbia. Water quality measurements for the Columbia River at Birchbank are from samples collected 10 km upstream from Trail, B.C.. The drainage area at this point is 102,852 km2, with the Rocky Mountains to the east and the Purcell Mountains to the west. The river flows in the Rocky Mountain Trench and is used for drinking water, irrigation and industry and supports populations of cutthroat, rainbow, bull, and eastern trout and whitefish. Cirque glaciers in the high Purcell and Rocky mountains drain to the Columbia River and the glacial silt imparts a gray, muddy colour to the river at times. This is alleviated by the time the water reaches Birchbank due to the settling provided behind the reservoirs created for electricity generation.