Extension of the High-level Sewer through West Roxbury, Brookline and Brighton, 160 Appendix No. 1. -Statement of Important Events in the Construction and Operation of the 182 Appendix No. 2. Contracts relating to the Metropolitan Water Works made and pending during the Year 1909, 186 Tests of Cements used on the Metropolitan Water Works, 191 Tables relating to the Maintenance of the Metropolitan Water Works, 198 - Monthly Rainfall in Inches at Various Places on the Metropolitan Water Works in 1909, Yield of the Wachusett Watershed in Gallons per Day per Square Mile from 1897 to 1909, 205 Table No. 8. Yield of the Sudbury Watershed in Gallons per Day per Square Mile from 1875 to 1909, 206 Table No. 9.- Wachusett System. Statistics of Flow of Water, Storage and Rainfall in 1909, Table No. 10. Sudbury System. - Statistics of Flow of Water, Storage and Rainfall in 1909, Table No. 11. - Cochituate System. - Statistics of Flow of Water, Storage and Rainfall in 1909, Table No. 12. Elevations of Water Surfaces of Reservoirs above Boston City Base at the Beginning of Each Month, Sources from which and Periods during which Water has been drawn for the Table No. 14. - Average Daily Quantity of Water flowing through Aqueducts in 1909, by months, 214 Table No. 15. Statement of Operation of Engines Nos. 1 and 2 at Chestnut Hill High-service 215 Table No. 16. Statement of Operation of Engine No. 3 at Chestnut Hill High-service Pumping Station for the Year 1909, . 216 Table No. 17. - Statement of Operation of Engine No. 4 at Chestnut Hill High-service Pumping Station for the Year 1909, . 217 PAGE Appendix No. 4. Concluded. Table No. 18. Statement of Operation of Engines Nos. 5, 6, and 7, at Chestnut Hill Low-service 218 Table No. 19. Statement of Operation of Engine No. 8 at Spot Pond Pumping Station for the 219 . Table No. 20. Statement of Operation of Engine No. 9 at Spot Pond Pumping Station for the 220 Table No. 21. — (Meter Basis) Average Daily Consumption of Water in Cities and Towns supplied wholly or in Part by the Metropolitan Water Works, (Meter Basis) Average Daily Consumption of Water from the Low-service System, 221 - (Meter Basis) Average Daily Consumption of Water from the High-service and Extra High-service Systems, 222 Table No. 24. - Average Daily Consumption of Water in Cities and Towns supplied from Metropolitan Works, as measured by Venturi Meters in 1909, . Chemical Examinations of Water from the Wachusett Reservoir, Clinton, Chemical Examinations of Water from the Sudbury Reservoir, Chemical Examinations of Water from Spot Pond, Stoneham, Table No. 29. - Chemical Examinations of Water from Lake Cochituate,. Table No. 30. Chemical Examinations of Water from a Tap at the State House, Boston, Table No. 31. - Averages of Examinations of Water from Various Parts of the Metropolitan - (Pump Basis) Consumption of Water in the Metropolitan Water District, as Constituted in the Year 1909, and a Small Section of the Town of Saugus, from 1893 to 1909, 226 228 229 230 231 232 Water Works in 1909, 233 Table No. 32. Chemical Examinations of Water from a Faucet in Boston, from 1892 to 1909, - Microscopic Organisms in Water from Various Parts of the Metropolitan Water Works, from 1898 to 1909, inclusive, 234 235 Table No. 34. Number of Bacteria per Cubic Centimeter in Water from Various Parts of the 237 Table No. 35. — Colors of Water from Various Parts of the Metropolitan Water Works in 1909, Table No. 36. - Temperatures of Water from Various Parts of the Metropolitan Water Works in 1909, Table No. 37. — Temperatures of the Air at Three Stations on the Metropolitan Water Works in 1909, 238 239 240 Table No. 38. - Table showing Length of Main Lines of Water Pipes and Connections owned and operated by Metropolitan Water and Sewerage Board, and Number of Valves set in Same, Dec. 31, 1909, 241 Table No. 39. Table No. 41. Statement of Cast-iron Hydrant, Blow-off and Drain Pipes, owned and operated by Metropolitan Water and Sewerage Board, Dec. 31, 1909, Table No. 40. Length of Water Pipes, Four Inches in Diameter and Larger, in the Several Cities and Towns supplied by the Metropolitan Water Works, Dec. 31, 1909, Number of Service Pipes, Meters and Fire Hydrants in the Several Cities and Towns supplied by the Metropolitan Water Works, - Average Maximum and Minimum Monthly Heights, in Feet, above Boston City Base, to which Water rose, at Different Stations on the Metropolitan Water Works in 1909, 245 247 Contracts relating to the Metropolitan Sewerage Works, made and pending during the year 1909, 250 Financial Statement presented to the General Court on January 12, 1910, 255 259 LIST OF ILLUSTRATIONS. Wachusett Dam - Inscriptions upon Granite Posts on Gateway at top of Dam, PAGE Diagram showing Comparative Amounts of Water collected in the different years on the Sudbury Diagram showing Average Rate of Consumption of Water in the Metropolitan District in 1909 during the Entire Day and Between the Hours of 1 and 4 at Night, 84 Making Wooden Insulating Joints on 48-inch Main in Brookline, 86 Map showing Metropolitan Water District, Watersheds, Reservoirs, Aqueducts and Pipe Lines, 90 93 94 94 Wachusett Dam - Gate and Power House, Diagram showing Average Rate of Consumption in Metropolitan Water District and Rainfall and Average Temperature of Air at Chestnut Hill Reservoir for Each Week during 1909, 101 120 158 158 272 METROPOLITAN WATER AND SEWERAGE BOARD. To the Honorable the Senate and House of Representatives of the Commonwealth of Massachusetts in General Court assembled. The Metropolitan Water and Sewerage Board, established under the provisions of chapter 168 of the Acts of the year 1901, has already presented to your Honorable Body an abstract of the account of its doings, receipts, expenditures, disbursements, assets and liabilities for the fiscal year ending on November 30, 1909, and now, in accordance with the provisions of chapter 235 of the Acts of the year 1906, it presents a detailed statement of its doings for the calendar year ending on December 31, 1909, being its NINTH ANNUAL REPORT made since the consolidation of the Metropolitan Water Board and the Board of Metropolitan Sewerage Commissioners on March 20, 1901. I. ORGANIZATION AND ADMINISTRATION. (1) BOARD, OFFICERS AND EMPLOYÉS. The term of office of Henry H. Sprague expired on March 21, 1909, and he was reappointed for the three years next succeeding. The membership of the Board has consequently remained as in the preceding year: Henry H. Sprague, chairman, Henry P. Walcott, M.D., and James A. Bailey, Jr. William N. Davenport has continued as secretary and in charge of the auditing department. Alfred F. Bridgman has been the purchasing agent and Miss Alice G. Mason the bookkeeper. There are also employed in the administrative office a paymaster, an assistant in auditing, two general clerks, three stenographers and clerks, a telephone operator, a messenger, and a janitor with two assistants, one of whom acts as watchman. George D. Bigelow has been in charge of the conveyancing work, and he has been assisted by Miss Alline E. Marcy, title examiner. They have performed such general conveyancing work and made such further investigation of real estate titles in the different counties as has been called for during the year for the general purposes of the Board and for the assistance of the Attorney-General in pending suits. The consulting engineers of the Board are Joseph P. Davis, Hiram F. Mills and Frederic P. Stearns, who are called upon for services when matters arise which require such consideration. Dexter Brackett has been Chief Engineer of the Water Works, with supervision of the various departments of both construction and maintenance. William E. Foss, who until July 1 was, as Division Engineer, in special charge of construction work and of electrolytic investigations in the Metropolitan District, has since that date, as Assistant to the Chief Engineer, had a general charge of engineering work in all departments. Others acting under direction of the Chief Engineer have been: Elliot R. B. Allardice, Superintendent of the Wachusett Department; Charles E. Haberstroh, Superintendent of the Sudbury and Cochituate Works and of the portion of the Weston Aqueduct above the Weston Reservoir; Samuel E. Killam, Superintendent in charge of the Weston Reservoir and the remaining portion. of the Weston Aqueduct and of all reservoirs and pipe lines within the Metropolitan District; Arthur E. O'Neil, Superintendent of the several pumping stations; Alfred O. Doane, Division Engineer in charge of engineering work at pumping stations; Benjamin F. Hancox, Assistant in charge of the Drafting Department; Arthur W. Walker, Biologist; William W. Locke, in charge of the sanitary inspection of the watersheds; and William E. Whittaker, Office Assistant. On account of the increased amount of construction work in progress during the past year there has been an increase of about 20 per cent. in the engineering force employed. The average force in construction and maintenance during the year has included, in addition to the Chief Engineer, 4 department superintendents, 2 division engineers, 6 assistant engineers, and 35 others in various engineering capacities and as sanitary inspectors, clerks, stenographers and messengers, the total force numbering 47. The maximum engineering |