Water Works at Lancaster, Pa.
F. H. Shaw, engineer and superintendent of the water works department at Lancaster, Pa., has submitted his annual report to the Mayor, who is ex-officio chairman of the water committee. Abstracts of the report are embraced in the following: “The improvements necessary to equip the station with duplicate apparatus of sufficient power and capacity to furnish at all times an adequate simple of water at a pressure sufficient to reach all parts of the city during the maximum rate of consumption are as follows: A new twelve-million gallon pumning engine with the necessary piping and all accessories; additional boiler equipment similar to that recently installed, designed for the high steam pressure required on modern engines: a traveling crane for use in handling the new engine; alterations in the old part of the present boiler house and an extension of this building to furnish room for the new engine: a storage shed for supplies, etc., to take the place of the present unsightly and highly-inflammable structure. The pumping machinery in use at present may be described as follows: One six-million gallon engine built I” 1884: one ten-million gallon engine built in 1893; one twelve-million gallon engine built in 1905. The six-million gallon Worthington engine was built in 1884 and originally installed at the old water works. This engine was designed to pump into the old standpipe and is capable of pumping about seven million gallons per day into the reservoirs and in connection with the” electric pump at the reservoir is capable of emergency work, but cannot be relied on for continuous service. It has been in service 29 years. A ten-million gallon Worthington high duty pumping engine was installed in 1893. The twelve-million gallon pump was built in 1903 and designed to deliver water to the top of the new standpipe during times of maximum consumption. This pump has been in service 10 years, or about one-half of the time usually allowed for machines of this kind. All three pumps are of the Worthington high duty type provided with compensating cylinders to take the place of the fly-wheel. The place may therefore bo said to contain only one engine capable of supplying the amount of water required during fires or maximum consumption. The greater portion of the city is supplied by what is known as the direct pumping system, and with installations of this kind it is generally conceded that three units should be available for service. Considering the age and liability to failure of the ten-million engine it is apparent that a new engine should be installed to take its place In considering this fact it must be borne in mind that fully a year would elapse from the time of letting a contract before a new pump would be in operation. The boilers at present in use arc four Babcock & Wilcox boilers with a total capacity of 116 horsepower, with a pressure limit of 125 lbs installed in 1887 (26 years old). Two National boilers with a total capacity of 480 horsepower, with a pressure limit of 125 lbs. were installed in 1898 (15 years old). Two Babcock & Wilcox boilers of 264 horsepower each, with a pressure limit of 200 lbs. were installed in 1912. Two new boilers should he installed similar to those put in service during the winter. As two boilers are necessary to operate the plant, there should he two in reserve, allowing one out of service for cleaning and one in reserve in ease of accident.
“The present rate of consumption is about seven million gallons per day, with a maximum rate of eleven to twelve millions for a short time on Monday mornings. The consumption has not increased materially during the last six years and with careful inspection of plumbing and mains for leakage and the continued installation of meters there should be no large increase for some time to come. If the territory supplied from the reservoirs can be increased the maximum rate of pumping can be decreased and the pumps operated at a more uniform speed. A pump having a capacity of twelve million gallons per 24 hours designed to operate efficiently at half to three-quarters speed will in my opinion take care of the consumption for a long time. The new boilers should have a capacity of 250 horsepower each. The boilers recently purchased from the Babcock & Wilcox Company gave so high a rating when tested, and such general satisfaction, that I believe the city could not do better than to duplicate the present installation. There are certain advantages in having all the boilers alike, such as the inter-changeability of parts and uniform operating and firing conditions Tn connection with the boilers there will be required a new feed water heater and the piping and valves necessary to connect the new boilers with the various pumps Pressure reducing valves will he necessary on the cross steam mains feeding the old pumps as a higher pressure will lie carried on the new pump. From preliminary estimates of cost submitted by various pump manufacturers, I have estimated that a pump such as I have reeommetlded above will cost in the neighborhood of $10,000,00. The cost of pumping equipment complete with piping foundations and accessories will be about $51,548,00. The addition to the west end of the boiler room which will be required for pomp room will cost, including the division wall between the pump and boiler rooms, about $0,555.00. The ten-ton hand power traveling crane for use in the engine room with steel columns. track and rad complete will cost erected about $1,866.00. The boiler equipment (500 horsepower) including feed water heater, steam piping, valves, etc., will cost about $11,348 The alterations to the boiler room, which include that part of the boiler room to be used as an engine room, will cost in the neighborhood of $3,091 The total estimated cost of these improvements is $79,198. There is included in all totals an allowance of 12 per cent, for engineering and contingencies, except that for the boiler equipment on which an allowance of only 5 per cent has been made, owing to the fact that this is practically a replacement cost of the last boiler installation.”