. Biennial report, Montana Game and Fish Commission, State of Montana. Montana Fish and Game Commission; Game protection; Wildlife conservation; Fisheries. POLLUTION CONTROL AND INVESTIGATIONS. Species oi water insects reflect the condition of water in which they live and are thus important indicators of pollution. The Montana Fish and Game Department has cooperated in the pollution control program by as- signing a biologist to the Board of Health. The state- wide classification was completed under the direc- tion of the State Board of Health which administers the Water Pollution Control Act.
. Biennial report, Montana Game and Fish Commission, State of Montana. Montana Fish and Game Commission; Game protection; Wildlife conservation; Fisheries. POLLUTION CONTROL AND INVESTIGATIONS. Species oi water insects reflect the condition of water in which they live and are thus important indicators of pollution. The Montana Fish and Game Department has cooperated in the pollution control program by as- signing a biologist to the Board of Health. The state- wide classification was completed under the direc- tion of the State Board of Health which administers the Water Pollution Control Act. This is a classifica- tion of Montana streams as to use so adequate pollution control standards can be established and maintained. An extensive investigation was made on the Clark Fork of the Columbia River during the summer of 1960, following a mine-mill waste pollution and fish kill in the late winter of that year. The upper 30 miles of the Clark Fork (below the Anaconda Com- pany settling ponds to Garrison, Montana, was found to be in poor condition biologically. Some improve- ment was shown in the river from Garrison to Bonner in late summer. Some of the increase in pollution sensitive organisms (those organisms unable to sur- vive in polluted conditions) in this section of the river was undoubtedly due to natural population fluctuations, but is a definite indication that clean water conditions exist. If present pollution abatement practices are maintained, the condition of the upper river will undoubtedly continue to improve. The effect of Missoula sewage on the Clark Fork River is still apparent below Missoula, but the stream should improve with the advent of sewage treatment of that city. A treatment plant is now under con- struction. The 1960 stream sampling reflected clean water conditions below the Bitterroot River in the vicinity of the Waldorf-Hoerner Pulp and Paper Mill. A severe kill of whitefish occurred in a stretch of river (approxi- mately 10 miles long) below
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfisheries, bookyear19
