Canadian engineer . »-g^-<^ I ? laJjiiT —. Figs. 6 and 7. It is 429 by 232 J^ feet in s,ize, and has a capacity of7,500,000 gallons. The roof is designed to take the load ofthe present and future installations of prefilters. The pre-filters now under contract are 16 in number, and are arrang- Each prefilter has an effective sand area 50 by 24 feet,which is divided longitudinally by a central wash water gut-ter, the sides of which extend above the normal water level ofthe filters. January i8, 1912. THE CANADIAN ENGINEER 195 Each prefilter has 8 lateral wash water gutters on eachside of
Canadian engineer . »-g^-<^ I ? laJjiiT —. Figs. 6 and 7. It is 429 by 232 J^ feet in s,ize, and has a capacity of7,500,000 gallons. The roof is designed to take the load ofthe present and future installations of prefilters. The pre-filters now under contract are 16 in number, and are arrang- Each prefilter has an effective sand area 50 by 24 feet,which is divided longitudinally by a central wash water gut-ter, the sides of which extend above the normal water level ofthe filters. January i8, 1912. THE CANADIAN ENGINEER 195 Each prefilter has 8 lateral wash water gutters on eachside of the central gutter. The filtering material consists of 8 inches of,gravel and30 inches of sand. Each prefilter will be equipped with a strainer and airsystem. Water for washing will be supplied from the washwater tower, to be built under contract No. 4, and fed byduplicate motor driven pumps, already mentioned nnder the A- o C) 0 ^ ificrr: {) o\ I - --^Jl u
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishertoron, bookyear1893
