特洛伊的供水。

特洛伊的供水。

THE water department of Troy, N. Y., has been organized for over forty years, and during the past year and more has been most severely tried, owing to the prevalent drought and increased demand. The supply was barely maintained, but only through the exercise of care on the part of consumers in obedience to caution notices published and the hazardous plan of reducing the pressure at night. More water, however, is imperatively called for, as there is an increased demand for it in the new sewer districts on account of the introduction of the modern conveniences, baths and closets, to say nothing of the natural growth of the city. The population of Troy in 1891 was given as 65,000, and the water is supplied the citizens (the city owing the works) from a series of five artificial storage reservoirs constructed in the valley of I’iscawcnkill, whose watershed is 1,363 acres, and the Hudson river at Lansingburgh, three miles above Troy This water is distributed by gravitatation, as is also the Hudson river water after being pumped to an elevation of 231 feet by two sets of Holly quadruple engines of 6,000,000 gallons capacity each, with piston speed of 90 feet. The total pumpage for the last year was 2,307,881,265 gallons. The average static and dynamic heads against which the pipes work are 231 feet and 242 feet respectively, the number of gallons pumped per pound of coal being 220.75. The cost of pumping, figured on pumping slation expenses, was $35.097.03—viz per l,000,exxf’gallons raised 1 foot against average dynamic head into reservoir $*5-3°; |)«i 1,000,000 gallons raised 1 foot high, dynamic $0.0658. Cost of pumping and gravity supply combined, figured on total maintenance, and interest on 4 per cent, on construction, $111,962.58; cost per 1.000,000 gallons $36.06; receipts for 1,000,000 gallons $30.46. The water (total population, State census, 1891, 65,000; estimated population on lines of pipe to date, 60,000) supplied to estimated population at date,58,000, during the year was 3,104,881,265 gallons; passed through domestic and manufacturers' meters (2(13 in use), 354.573.77° gallons; average daily consumption in gallons, 8,501,044; gallons per day to each inhabitant, 131; gallons per day to each consumer, 146; gallons per day to each tap, 1,288. There are now in use 58.03 miles of pipe (cast-iron 4-inch to 30-inch, besides 3,025 feet of small distribution pipe, less than 4-inch. The number of fire hydrants now in use is, public 751, private 31; of stop-gates, 1,192; of blow-offs, 36. The range of pressure day and night was: High service, 11 to 107 {rounds; middle service, 9 to 105 ; low service, 11 to 60. The total number of services (A A lead and cast-iron, 3-4-inch to 6-inch) is 6,598—average length 35 feet; average cost (estimated) $25,

The boilers of the pumping engines were under steam 365 days, averaging 23 hours and 39 minutes each day, during which 6,393,023 gallons were raised on an average each day the machinery was in operation, the total raised being 2,307,881,265 gallons during the year. The maximum daily pumpage was on July 7. 1894, 6,680,181, or III. 3 per cent, of the capacity of the pumps. The maximum monthly pumpage was during November of 6,511,092 gallons per day, or 108.5 percent, of the capacity of the pumps.