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THE OSHAWA DAILY TIMES, THURSDAY, OCTOBER 6, vesw 5 PAGE SEVEN New Filtration Plant is Triumph of Engineering OSHAWA"S NEW FILTRATION PLANT IS THE LAST WORD IN EQUIPMENT OF ITS KIND New Plant Was Specially Constructed to Fit Into Equipment Previously in Existence and Cost Pub- lic Utilities Commission Total of Over $155,000 (By Frederick A. Dallyn, CE, M.E.L.C,, Consulting Engineer Toronto) The review of the water filtration undertaking at Oshawa dealt with herein has been prepared rather with the idea of informing the general public than for the purpose of instructing the practising pro- fession. The enterprise was embarked upon by the corporation as an un- employment relief measure, after it had been determined that the gov- ernment would look favorably there- upon and assist in the same gener- ous manner as it had done in other localities. The management of the plant and the waterworks system generally is in the hands of the Oshawa Public Utilities Commission, who appear as principals through- out the Sieipiise. d Works Scrapped The 0a Ye prior to the work described herein being undertaken had been a source of complaint on the part of the local health auth- orities and the Provincial Depart- ment of Health. The existing fil- ters, four in number, were con- structed in 1917-1918 by the John ver Mehr Engineering Company, acting as engineers and contractors. The equipment had not only ceased to perform a useful function but at times actually introduced a higher bacteria content into the water than was present in the raw water supply. The facilities for back- washing the drifting sand filters were both inadequate and in disre- pair. The sand had been gradually increased in size in order to aug- ment capacity, and at the filtration rate it did not offer a sufficient re- sistance to-arrest the coagulant and promote proper filtration. The old filters , and equipment were taken down to provide room for the new chemical building. An examination showed many of the underdrains to be heavily corroded and unable to properly distribute the backwash water. This, taken together with the fact that the drifting Zinelgle, which was an im- ortant feature of the original plant, ad been out of service for some years, indicated that the useful life- time of the work had been reached before the anticipated period. In & -* - addition to the aforementioned mat- ters the devices for feeding coagu- lant were found to be inadequate. The scrapping of the original filter without salvage therefore proved justifiable. Suction and Discharge Arrange- ments In reviewing the local situation before attempting the design of new works, it was necessary to con- sider .t some length the suction and discharge conditions of the existing pumping equipment, and to consider the fire protection in the event of the recently constructed clear water reservoir being unwatered for ex- amination and repair, The examin- ation revealed the fact that many of the suction lines were of inor- dinate length and for most of that length above the static level of the intake well, even under high water conditions. It therefore appeared of prime importance to include in the undertaking a complete revi- sion of the suction and. discharge conditions of both the high lift and low lift pumps. This was accomplished by laying a 30-in. suction header from a point adjacent to the existing intake well and providing thereon for a future intake well and making therefrom a secondary connection to the ex- isting intake, the whole being kept well below the hydraulic gradient up tu. the capacity of the existing intake. Beyond the capacity of the existing intake a new well and in- take would continue the capacity up to approximately twenty million gal- lons daily without disturbing the same advantageous hydraulic gra- dient. Vertical legs, 20-in, in diame- ter, cere constructed to serve each of the pumps and a new connection was provided to serve the gasoline driven emergency fire pump, either from the lake or the clear water reservoir. The raw water supplies were united by a 30-in, venturi me- ter to permit of chemical dosage either for disinfection or coagula-| suc- | tion, and the filtered water tions were arranged so that point of application would reach equipment. Making Use of Existing Structures A feature of the undertaking is the somewhat unusual use that was made of the existing structures witl- out detracting setiously from a har monious architec. tural arrangement This necessitated a simplification of the usual filter pipe gallery and underpinning of the slab of the existing clear water reservoir. This was accomplished without sacrific- ing the workability of the inlet and effluent lines and the wash water devices. Provision is made in the design for alternate methods of one all JOHN STACEY Member of Oshawa Public Utili. ties Commission, 3 WILLIAM H. ROSS, Member of Oshawa Public ties Commission, Utili- 1 Chairman, Oshawa Public utili- FRANK L. MASON ties Commission, ALLCHIN, Utili- GEORGE C. Member of Osh'wa Public ties Commission. re acl | sug ply | basin, {in dep out ¢ made for | tor to supplen ' | water tank ild that equipment | be out of service at any time for painting or examination. Perman- .ent thimbles were left in all struc- tures so that future expansion tc several times the existing capacity could be arranged without serious interruption of the plant. Cost of the Plant m event of the coagulatic which i units, being Provision is als insertion of an ejec- The following summary of cost is | of general interest . The original speakers. OFFICIAL OPENING -- OF THE -- NEW FILTRATION PLANT OF THE OSHAWA WATERWORKS SYSTEM OSHAWA-AT-THE-LAKE The new plant recently completed will be officially opened on Friday, October 7th, at 2.30 p.m. by the Hon. J. M. Robb, Minister of Health of the Province of Ontario. Addresses will also be given by several prominent The Building will be open for Public Inspection on this occasion and all Citizens are cordially invited to attend. Should any citizen find it impossible to be pres- ent on this date the Oshawa Public Utilities Commission invites you to visit the Plant at any, time. OSHAWA PUBLIC UTILITIES COMMISSION G. F. SHREVE, General Manager and Sec'y. F. L. MASON, Chairman. g the filters with a raw w ater| contra n| ral cont 1cts, is constructed of two extr ! entirely | ent the elevated wash] ct price is given for the s and the alter: ances therefc | th the engineering, the total being within he 10 per cent 4 = estimated in engineering | ontract and external | Equipment, piping, | Tra si rmer and electri- cal work ....i... on Wash water tank. ..... io} Moving residence and re- novating plumbing 2,236.00 3,068.00 8,250.00 £142,616.20 rineering, _ alterations nd extras 12,773.93 (Continued on page 10) 1,327.00 | $155,390.13 Members of Oshawa Public Utilities Commission MAYOR THOMAS HAWKES, Member of Oshawa Public Utili- ties Commission, EQUIPMENT FOR FILTRATION PLANT 13 INTERESTING Control of Water Flow Is Feature of Filter Machinery (By E. Dean Wilkes, E. Dea: Wilkes & Co., Toronto) One of the interesting features of the Oshawa filtration plant described in the previous article is the con- venient manner in which the rate of flow through the effluent rate controllers can be changed from the operating table. The Builders Iron Foundry Type A rate con- trolletrs used on this work were elected because of the low loss of liecad at maximum rates. The con- rol valve of each controller is op- erated hydraulically from a pilot valve which is an integral part of the diaphragm pendulum pilot valve unit, The control rate is deter- mined by the position of a small cam on this pendulum unit and this gauge, on the operating table. Turning the knob winds or unwinds a fine cable attached 1. the cam, thus changing its position and with it 'the rat flow through the controller. A feature of the wash water sys- tem that ic interesting is the Build- ers Iror Foundry wash water con- troller. This controller comprises a Venturi tube with a control valve in the oudet cone--a registerin; and recording instrument that has built into it a pilot valve control for the valve. This pilot valve con- trol allows the filters to be washed at a fixed rate of flow, and this rate can be changed by means of a smal! "wrt on the fr-at of the vl recorder. A large secondary indi- cating dial mounted on the wall is operated electrically from the wash water meter register-recorder. Ar ther interesting feature is the use of the cffluent rate controlier valve on cach filter for the addi- tional service of a back wash valve. This controller valve is of the gate valve type, especially designed for its service and is connected to the back wash handle on the operating table as well as the pilot valve con- trol. This arrangement resulted in appreciable economies. The Omegz Universal alum feed machine has a novel feature in its control in that its rate of feed is vari: by the rate of flow through the 30-in. raw water Venturi meter. The control is transmitted electric ally from the meter register, which is situated about 150 feet away. A coincidence is when it rains when the weatherman says it is go- i to rain, When a business man goes home he usually sheds his manners with his coat and shoes. The 'man without a particle of humour in his system has little use for breath in his body. 3 Most of us would be charitable if we could get hold of money that we < n't need for anvthing else. 25 Albert St. cam is moved by turning a small knob, mounted at the back of the The New IN ~ Was Built by LIMITED Filtration Plant OSHAWA The W. J. Trick Company GENERAL CONTRACTORS Telephone 230 Telephones 230-231 FREDERICK A. DALLYN CE, MEIC, | Of Toronto, consulting engineer in charge of the designing and construction of the new filtra- tion plant which is being open- ed to-morrow. Elsewhere in this issue is an article describing the new water filtration plant in Oshawa, Ont. written by Frederick A. Dallyn, well-known consulting engineer of Toronto, who was engineer in charge of the designing and con- struction of the plant, and who has made a specialized study of the sanitary sciences and who has been responsible for the design of many water supply and sewage treatment plants throughout On- tario. Mr. Dallyn, who was horn in Hamilton in 1886, graduated in 1910 from the Faculty of Ap- plied Science and Engineering of the University of Toronto with the dagree of B.A.Sc. Three years later the university bestowed on him the professional degree of C.E. His engineering work ante- dated his studies at the univer- sity, for in 1905 and 1806 he served with the Canadian West- inghouse Co., Hamilton; Cataract Power Co., Hamilton, and the Massey-Harris Co.. For a period after graduation he was engaged on design work with the Bishop Construction Co., Toronto, and in 1913 was appointed provincial sanitary engineer, Ontario Des partment of Health, a position he retained unti] 1926 when he en- tered private practice. Mr. Dal- Iyn also served for two years as sanitary advisor to the Interna- tional Joint Commission, and during the period of the war was consultant officer in military dis- trict No. 2. He served in Canada and Siberia with the headquar- ters staff of the C.E.F.S. and the 16th Field Company of the Can- adian Engineers. He also was di- rector of the inter-allied anti- typhus expedition to Siberia in 1918-19, The Oshawa Filtration Plant was equipped by W. J. WESTAWAY CO. LIMITED During the years 1931 and 1932, W. J. West- away Co. Limited have been entrusted with the installation of municipal filtration equip ment for the cities of Brantford, Calgary, 'Ottawa, St. Thomas, Toronto (under con- struction)' and Oshawa. These six municipal filtration plants installed by Westaway, total 180,000,000 imperial gallons of filtered water daily. "WESTAWAY ** LIMITE TORONTO.- 'HAMILTON = MONTREAL = -