. Annual report of the Metropolitan Water and Sewerage Board . ntracts have not yet been settled, and afew claims for land and other damages also remain to be adjusted. One siphon pipe required for the crossing of the Sudbury Riverand Happy Hollow valley in Way land has been laid, but ultimatelythree lines of these pipes will be required, as the demands of theDistrict shall increase. The cost of the aqueduct, extending from the dam at the SudburyReservoir to the terminal chamber overlooking the Charles River atWeston, exclusive of the reservoir, will be about $2,500,000, whichis about $200,000
. Annual report of the Metropolitan Water and Sewerage Board . ntracts have not yet been settled, and afew claims for land and other damages also remain to be adjusted. One siphon pipe required for the crossing of the Sudbury Riverand Happy Hollow valley in Way land has been laid, but ultimatelythree lines of these pipes will be required, as the demands of theDistrict shall increase. The cost of the aqueduct, extending from the dam at the SudburyReservoir to the terminal chamber overlooking the Charles River atWeston, exclusive of the reservoir, will be about $2,500,000, whichis about $200,000 per mile of the aqueduct proper. The cost ofthe reservoir, having an area of acres and a capacity exceed-ing 200,000,000 gallons, is about $350,000, or about $1,720 permillion gallons. The cost of both aqueduct and reservoir will,therefore, be about $2,850,000. The State Board of Health, in its report of 1895, estimated thecost of the aqueduct as then proposed at $3,226,000. This estimate,however, was for one having a capacity of 250,000,000 instead of. No. 57.] AND SEWERAGE BOAED. 13 300,000,000 gallons per day, and did not include an equalizing reser-voir. Although the present aqueduct has a capacity exceeding byone-fifth that formerly proposed and includes in addition the WestonReservoir, the work as now constructed has been largely within theestimates made by the State Board of Health. (3) Clinton Sewerage and Filtration Works. An improvement has been effected during the past year in thefiltration works which are used for the purification of the Clintonsewage. In connection with the filter-beds, which are located inthe town of Lancaster, 8 separate settling basins have been con-structed, each about 320 feet long and 33 feet wide, and having acapacity of about 237,000 gallons. The basins are in general constructed upon the surface of theground, so that the bottom may be to a considerable extent imper-vious to the passage of water. Each basin has an inlet and outletstru
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