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Les diagrammes suivants illustrent la mdthode. 1 2 3 1 2 3 4 5 6 {ioi Kj^ 1^ W m MOf^TREAL WATER WORKS # •'*»}'"■;.■■ V' THE REPORTS OF \ '.it ■.'v';,.>^- ^ )* ■ Jii^ \^ .:&! k'v-^^ '■"]! a^- -^•fpw^ H3TAW J/ia^iiT/iOM mioqtqfi am i>— .ira"^ (.ssaM , p^^h ^rjytmtmfdfj/ W')^':/ ;n a hm//A 'mvr:,in ^mann m/uji// ""'., ''*^ v^"^--. ■^i^Mifor) 7 m \^-^'-' « ti V '. iAi,.ii_-x . .^v t.-'^h^A ..' i: :■:..; i^:^"'Cw.- tvlLiii-l c.^.^. '^ STCAM CNCINC WHEEL HOUSC I'liri.tiid, liatririiiu is Co. .lath Montreal Biirj.md, Latticaju k Cu.,hi\h Montrea] . MONTREAL WATER WORKS THE RETORTS ^ / l«C OK WALTER SIIANLY, Esq., T. C. KEEPER, Esq:, AND JAMES R. FRANCIS, Esq., of Lowell, Mass., REVIEWED BY WILLIAM RODDEN, Alderman. MONTREAL, Marcli, IHiIll. 1^ MONTREAL : PbINTKD BV TnK MONTBBAL PbINTINO AND PUBLISUIVO COMPANY. 1869. '■■ } \i 'W BSSio d :^ To His Worsliip the Mayor, William H'okkman, Ehij., Alilcrmeii, Councillora, ami Citizens of Montreal. I (fKNTLKMKX I Tlio proflont condition of tlie water supply lor the city of Montreal, the lar^e outlay already incurred, the future ariver extension or feeder to be carried out, the time must soon come when the supply in winter would be insufficient, and the troubles of past winters be repeated." " If a canal or feeder in the river was made, without paying the OAvnei-s of the river front large sums of money there- for, you could not cut them off from access to the water of your canal, and in a variety of ways the throwing of it open to them might render the water liable to suffer disturbance and contract impurities." " Noi- would the hydraulic results be wholly satis- factory, not without also giving increased capacity to the existing works." An enlarged or new aqueduct is an inevitable element of any plan " to enable the ivorks tofvnmh the required addi- tional supply^ Speaking of Mr. Francis, Mr. Shanly says, — " I found him very decidedly inclined to the construction of a new canal, pure and simple, with the lowest known stage of the river for the standard head of water, as the most certain remedy for the difficulties of the past, and as the pla,n best adapted liy giving it ample proportions to ensure an unfailing supply in the future." Careful examination of these reports cannot fail to convince us that Messrs. Shanly and Francis are about agreed as to the cause of our water troubles, and the best and safest remedy ; alsJ Kcl adtp as asii be tb ird i a'* .r..v 'f more than ^00; total, 1^1 extension It may be 1^ to uiifler- adflitions, >'■ a portion q'en'ments, pending t'cessary to J^ together, ter supply Keefor's ated their ■e opinions from tJieir 'er to bo ill winter inters be e, without lej there- '■ of your to tJieni contract "y satis- exi.stinir element id addi- nd him ^ pure ^or the or the nwg it ire." ice us the ledy; I '« also, that from the language they use, they do not consider Mr. Kcefcr's plans the proper ones to adopt. Thus far the Council adopted Mr. Shanly's recommendation to provide a steam-engine as a means of temporary relief. Having done so, and having set aside that part of the suggestions of Mr. Keefer, the question to be now determined is, Will we go oi as advised by two out ot the three eminent gentlemen called i i to help us through this important question, or will we be justified in dismissing their views so forcibly put and accept the contrary advice offered by Mr. Keefer ? I have no difficulty in admitting that where two such men agree, the recommendations of the third one should be set aside, and in support of that course I may urge — 1st. The high and independent standing of Messrs. Shanly and Francis, professionally and otherwise, entitle them to unre- served confidence. 2nd. They are not wedded to, nor have they been in any way connected with, any previous plans or the progress of the works thus far : therefore they are unl)iascd and free to consider things as they found them. ord. They echo no doubtful soimds, report no partial remedy, but clearly and emphatically point to the only reliable means of safety for the future — an enlarged or new a(|uedect. 4th. An examination of the facts in connection with tlie whiter state of the aqueduct, the tests and trials, experience of die past, and the estimated cost of the proposed projects, will support their recommendations. To arrive at the best means of accomplishing the much desired result in due time and in the best way is our next and most pvcssiu"" duty. Here, it is admitted, a degree of embarras8n\ent is felt, difficult and trying, which can only be overcome by comparisons, study, and calculations. It is believed that the steam-on"-ine, when fully proved, will afford relief when the water is low, will help the water-wheels when there are obstruc- tions in the aqueduct, will prevent the necessity of drawing down the head which lowers the ice and hicreases these obstructions in very cold weather, and will render great assistance in case of accident to the canal, or while new works are progressing ; but '/ ' ll»% I 8 it docs not obviate the necessity of making preparations for works wintl to give the city a permanent and reliable supply of pure water v.atc| from the river to the wheel-house. Additional steam-power on the river side and gravitation supply have been advocated, but fronj must now be dismissed, because of their expense and difficulty as \ well compared with additions to the system in use, upon which so I Vfori much has already been spent, and which can within the next | watl four or six years be made perfect beyond a doubt, if the | supl expense is approved and power obtained to execute the works. \ froJ The three engineers agree in recommending that whatever is '\ si.n1| done should be with reference to and a part of future operations. \ cot Therefore, we are in duty bound to adopt a comprehensive and , ret complete system once for all, and determine what portion of it must receive our immediate attention, and what may stand for future performance. The citizens will no longer tolerate a system of annual additions with constant uncertainty. There are three projects for consideration which may be designated A, B, and C, each of which may be divided into sections one, and two. Section one^ in each project, to provide relief against such difficulties as occurred last winter. Section two, in each pr< ject, to shew the continuations of the works which may be necessary for the future supply of the city. Project A. Section 1 is another turbine-wheel at the wheel- house at a lower level, lowering the breast-wheels, removal of stop-gates to entrance, deep still water basin at the river, and constructing a canal or feeder up the river to Fraser's ; also enlarging the aqueduct from the Rock-cut to the river. Section 2 is continuing the crib-work canal or feeder up the river as far as may be necessary, and whenever the additional head may be required ; also completing the enlargement of the aqueduct downwards from the head of Rock-cut to the wheel-house. It is not necessary now to consider the utility of " another turbine at the wheel-house ;" that was set aside when Mr. Shanly's views are adopted and an engine put up to do that work. The wisdom of that course is now clear. With the small quantity of water which is passing through the aqueduct this [ns for works Pu^'o water i-po\ver on [ocated, but difficulty as ^Jiich so *he next h' if the works. fhatevcr is Iperations. 'nsive and tion of it stand for a system may h^ sections ^e relief '■ two, in ich may ! whcej- val of fj and > also sction s far J be duct :Iier VIr. hat laJJ bis winter, it would not have been possible to supply the city with water by the pumping done by any de^jcription of water-wheel. The head of water to the present turl)ine wheel is varying from foui-teen to fifteen feet, and quite high enough to work it well if the supply was furnished to it ; but it cannot be kept at work because it draws down the he. id at the whc(,'l-house, the water way in the acjueduct not having the capacity to give the supply as fast as it is recpiired ; an( when the water is drawn from below the ice faster than it enters from the river, the ice sinks until it reaches the bottom ; the obstruction thus becomes complete, and the city is left without water until the ice is removed and the charmel cleared. " The lowering of the hreast-wheeW'' is a more serious under- taking than supposed. Such an operation would disturl) all the machinery of the Avheel-house and its supports, which in all probability could not easily be replaced and made as secure as at present. Alterations to such works are always attended by great risk, and it is next to impossible to make the old and new work connect as securely as the original. A small amount of money spent in another way might serve towards altering inlet of water to the wheels. Any alteration to the wheels will be useless until the af^ueduct is made large enough to supply the water required to work them in winter. Tbe wheels should not be lowered excepting as a last resort, particularly as it is only for a short time during low water that they are not fully supplied. Furthermore, inside of ten years hence additional wheels will be required, the placing of which at a lower level will be worthy of consideration. " Removal of the stop-gates to the entrance of the aqueduct.''' — I have much difficulty in obtaining any information of the reliability of this proposition. What I do get is, that it is considered by most competent persons to be an experiment of very doubtful character, which can only be made serviceable under a particular head of water and state of the weather which may not occur together. " Deep still water basin at river entrance of aqueduct.'^ — Such may or may not be of great service there. Much will depend upon the position of the work, the water levels in the river, and the degree of frost while the water is at a particular 10 lici-^ht. The rock obstructions in the bed of the river, at and above the entrance of the a(|ueduct, and the fluctuations of the currents and depth of water there, naturally affect the operations of any entrance. Previous experiments have been unsatisfactory, and nothing short of a trial can determine the exact result. The question presents itself — Is it Avorth while or safe to expend anything more on experiments ? particularly for such meagre results as those promised by Mr. Keefer himself. Speaking of the change in stop-gates and the basin at entrance he says — " These simple measures, I believe, will have the effect of diminishing by at least one-half the ice difficulties in the aqueduct." The fact is, that the " ice difficulties" during the last week of February and first two weeks of March, 1868, reduced the water area to 54 feet and the pumping pressure from 80 lbs. to *10 lbs., while the river level varied from 85 to BG feet above diitum. This state of things reduced the supply to 2| millions pumi)ed upon the city, at and below St. Catherine Street, the })Owor being insufficient to reach the higher levels. On the 20th of December last the ice -difficulties of this season commenced : the area or water way was reduced to 190 feet, and the sup])ly brought down to 4 J milhons of gallons daily ; since which time the gradual increase of ice and frazil reduced the water area in January to 140 feet, and the pumping pressure was 70 to 75 lbs., producing only 2^ to 3 millions of gallons daily — a part of the time pumping upon the higher and a part upon the lower levels of the city ; and the reservoir was drawn down several feet to assist the consumption, while portions of the city were alternately deprived of water. On the 17th of Feb. last the thipkeniug of the ice had reduced the water area to 104 feet. With this supply of water from the aqueduct, the '' turbine" water wheel and the steam-engine pumped together about four millions of gallons, a portion going into the reservoir, the water in which was raised during night, the rest going directly to supply the city. Of the four millions pumped that day the superintendent estimates only about one by the turbine and three by the engine. On the 13th of this month of March the ice had reduced the water area to 58J feet. Not much pumping could be done with the wheels ; the engine was affording a moderate supply. It is admitted that, without the el ti SI *^« rjvor, afc and 'ctiiations of tlio 't^e operations of satisfactory, and ct result. The safe to expend f «"ch meagre • Speaking of ance ho sajs^ *^^e effect of cuJties in the :f '^"""^' the March, 1868, P»ig pressure ''I f^'oin H6 to ;a the supply ^t- Catherine higher JeveJs. ^ tin's season ^0 190 feet, ^%; since ''educed the ^S pressui-e ' of gallons and a part ^as drawn '"^^s of the h of Feb. ea to 104^ «ct, the together eservoir, ^^ going 'ed that turbine •rch the much ^ was ut the ■ * I u en;^iiic, the city could not now be su[»|)lio«l, the mildnoss of the winter (with a sli^lit decrease of licad at the river entrance) ilives now 58i feet a'^ainst the 54 feet water area of this time last year. These facts ouiniot fail to shew that the chananks of the ' extension, ^^ith other ' and more out much Eraser's ' reaches ^n 2 is e at the oosed to d canal, ej near e about I i i 13 3 to 3| thousand feet further up than the present entrance, affording 10 inches more head, and protected by a projecting point and shoal above it where the current inclines more from the shore, carrying from the entrance, instead of towards it, floating ice, frizil, other obstructions and ]-gates, the construction of a de ;p still water basin, and the extension of the present aqueduct by crib-work or embankment as far as Eraser's, to reach the same point in the river as the entrance of the new cut, with the same capacity and head, but obtaining it by another and different work. It is supposed that the execution of this new work, from the Rock-cut to Fraser's, will save us from further trouble for several years. In this opinion I do not quite agree, inasmuch as I believe that, when the winter season is very severe, there may be such trouble from ice obstructions, just above the settling-pond or basin at the wheel-house, as to render it necessary to extend that basin some distance upwards, or enlarge the a({ueduct there, thus giving it additional capacity, and prevent the damaging effect that ihe drawing down of water by the wheels may cause at that place. Close observation and tests during this and last -winter, of the way ice obstructions and frazil are drawn by the current in and along the aqueduct downwards, gradually becoming part of the ice covering the water, have shown the advantages to be secured by a new entrance at that place, with a large canal, which will reduce the current to less than one-half of the speed, drawing in less ice and frazil, and affording room for what little is drawn in to lie up along the enlarged entrance of the a({ueduct. It is supposed it will confine a great portion of the ice and frazil obstructions to the new section above the Rock-cut, while sufficient water way will be left to pass the much desired quantity, leaving the Rock-cut and the section below it to contend only with the ice which will be formed thereon by the severity of the weather ; care, however, being taken to avoid drawing down the head, and with it the ice on the section near the wheel-house. To determine which of the projects will be adopted, if any, it is necessary to look at the cost of the first section of project A as compared with that of project B, and at the same time IM ! 14 consider the advantage it would be to have another entrance of a ijcnnanont character in a deep bay, not of })eriahable material, not exposed to wear and tear of ice shoves, not incurring bills of damage for river front, and not exposed to distiirbance of the water and accumulation of impurities and filth that would be conveyed to the city water supply by the river front canal if adopted. Section 2 of this project B would be enlarging the present aqueduct from the head of the Rock-cut to the wheel-house whenever the further enlargement proved necessary. Should the city continue its present annual growth, it is estimated that within six years the second section of any of the Projects, A, "R, or C, will engage the attention of the Council, unless such extensive reservoirs be constructed as to retain over two months' sujjply of the city from Dorchester Street upwards ; and even should these reservoirs be made, it would not be safe to neglect at least widening the acjueduct just above, or lengthening the settling basin at the wheel-house. This section of Project B Avould be the same as section 2 of Project A, and in all res})ects liable to the same objections, owing to the necessity of drawing the water oflf the aqueduct and supplying the city by steam and reservoirs while the work is beuig done, thus adding so much to the expense as to make it a matter of calculation as to whether widenirg the old or making a new cut would be best. Project C Is a new canal throughout, divided into two sections for comparison with other projects. The first section will extend from the river below Fraser's Point, along the valley there to the Rock-cut of the present aqueduct. The second section will be a continuation of the new canal from the head of the Rock-cut to the settling pond at the wheel-house. The first sections in this and in Project B are the same, both having the new entrance. The difference between these two projects is that one is enlarging the old canal from the Rock-cut to the wheel-house ; the other is a new cut throughout. If Project A be dismissed, the choice will lest between enlarging the present canal and making a new one. There are many considerations to be examined to reach per entrance of Miablo material, ^* ''ncurring biJiJ ^he settlin/r ect B would all resj)ects necessity of <^lie city bj thus adding alculation as "Id be best. actions for ^ill extend he vallej fie second le head of he same, between Id canal ^r is a ' choice g a new 3 reach ! 16 wiflc conclusions. The remarks made on the difficulties of enlarging in Project A, will apply to enlarging as part of other projects. If enlarging could be done without disturbing the city 8upi)ly, and without its being necessary to provide other means of supi)ly while the work progressed, there would be much less difficulty in the choici . This, however, cannot be hoped for. Therefore, if the expense of enlarging and keeping up the water supply while that ii, going on will exceed the expense of a new canal, there will be no difficulty in setting aside the enlarging, and considering the adoption of a new canal of the required size on its own merits. The advantages to be obtained by constructing a new canal instead of enlarging the old one will be found in the following facts : — The entrance of the proposed new aqueduct below Fraser's Point aftbrds greater protection from ice, frazil, and other obstructions, greater depth of water, and more head ; the work can progress without in any way deranging the present water supply ; the impurities occasioned by working on the old canal to enlarge it, while water is passing to the city, will be avoided ; it will obviate the necessity of incurring a large outlay for temporary works to supply the city with water while it is being done, which expense could not be avoided in any other plan that would afford permanent relief; it will give a volume of water to the machinery at the wheel-house which will ensure ample power to supply the present pumps, and such others as will be added, for years hereafter ; and it will give a second aqueduct. One can be used while the other is being repaired or cleaned ; one can furnish the pumping power and be extended up the river if such should ever be necessary, while the smaller one would remain to supply the pumps for consumption, the entrance to which would continue to draw its water from a part of the rapids not exposed to filthy obstructions, and as free as possible from the pollution which a feeder along the river side would convey direct to the city supply. The last but not least important fact iu reference to the new canal is, that it will not cost more than enlargmg and extending the old one, presuming the engineer's estimates to be correct ; indeed, it will cost less than extending and enlarging, taking into account the large sum which would necessarily be expended in furnishing the city with I 1 1 \ l;i l,^ VU' 16 water whilo unlargiiig wont on to tlio interruption of tlio present supply. A SMALL CANAL. It must be admitted that the present canal, only 20 feet wide on the buttom, is quite too small. It was a mistake to make it so small. Ice will not form to so great a depth on the large as on the small canal. The depth of ice on the present small aqueduct is often five feet and over, while on the settling pond it varies from two and a half to three feet, and on the Lachino Canal it averages about the same. The experience of mill- owners throughout Canada goes to show that small streams in this climate are not to be reUed upon in winter. Fhictua- tions and obstructions that must arise, and are beyond human control, affect small streams at once, while the large stream has ample room to recover from such difficulties before serious inconvenience arises. It must be remembered that over twenty millions of gallons have to pass through the aqueduct to put one million into the city reservoir. As the city grows the quantity required increases, and with it the draft upon the aqueduct increases the current. A small canal, with a rapid current, is much more likely to carry in ice and other obstruc- tions, and suffer from them, than the larger canal with slower current into it. The winter state of the old Lachine Canal, as compared with the present canal, affords a good example of this. The full importance of a few words from Messrs. Shanly & Francis on this subject should not be lost sight oi, i.e., " In a climate such as ours, size is the surest mode of obviating winter obstructions in hydraulic works, and it is very certain that a wide canal with the lesser head will prove a more effective and reliable power than a narrow one with the greater head." Ten years' experience as owner of a grist mill on a country stream as wide as the present aqueduct enables me to endorse these opinions. MR. reefer's last REPORT. The latest report on this subject is from Mr. Keefer, and recently published. It furnishes his estimates for a crib-dam feeder or canal from the entrance of the present aqueduct in the river to the Lachine Church, at a cost of $25 per foot — total, \ 1 ■^ ^ii-i' 1 of the present b 20 feet wide ke to mako it Jn the Jar^^o as present small 5 settling pond '" the Lachinc ence of mill- II streams in er. Fluctua- are boyond > while the 'fc difficulties remembered through the As the citj draft upon with a rapid ber obstruc- kvith slower B Canal, as Plo of this. '■ & Francis imate such bstructions canal with ble power en years' m as wide opinions. efer, and crib-dam ct in the t — total, ' }/n'!"'i>"'- '■ ' ' ""' '" ' y >'i»>'>'>^ - %^;//>WII:W,»t'"'-r^ CROSS SECTION OF PROPOSED NEW AQUEDUCT, SHC CONDITION IN MONTH OF MARC! BOTTOM LEVEL 26-00 OR 3 FEET LOWER THAN PR WATER AREA 696.00. M l lll|l; I H I| |l;;|rl;l |lll M .nll|lil| iril|;lUII;lini|l!lllli',i;'llli;|' DKAjrXJt ' )ni!})>y))m>m»m>ii"i'm)»vi>m>'""»'!">"''""»'H""'i"" >»imiiii:mj)'i'>» "ri'n)i}h Z o O z o a CO 200 FEET BELOW ENTRANCE. EA I 58 .50. SCALC ZO r £ £ r TO AN INCH f^ifrr'f . ""'/P^>' '' >">""rt}»'"": ' i"" >' o i CO ^ — > < ^ Si in z o H O LlI CO '-0 lO o q: 200 FEET ABOVE ROCK STOP GATE. WATERi A RE A i /44- 00. 200 FEET ABOVE SETTLING POND. .^' "Nn^r-:-,,- 5 N O W ^,1- 'lillhll"'!-^ W A TEH iJnrLiiid LjtVv !ii 1 '"^' Ijti. I'tptra h .i'w NEW AQUEDUCT, SHOWING ITS PROBABLE IN MONTH OF MARCH. EET LOWER THAN PRESENT AQUEDUCT. :R AREA 696.00. TTrT7Trrri MHM l Mi l ill lill |;Hi;; i |li;iimu lTTrrryrrrTTT^^ M 1 ' M 1 " I 'ii ZSH-JLJl^ZSl •)m"i'wmii"!i"i'i"'t-ii'm)i' ' f!""i"'f'»"i mnmimmmmmmmiimmmi F e er to an inch. 300 FEET BELOW ENTRANCE. f^rrr^'H^i'TTTiT rirrr TriTTfPf"Tr IIHI,' I I :>" WTrmTTTTryrmn^ WA TER , AREA SS4-.00. 300 FEET ABOVE ROCK STOP GATE. WATER H/ATER) AREA ) 167 00. 100 FEET ABOVE SETTLING POND. O (/) g o z o ■n > o c: -o o O H 00 00 X o z (D H resent a(iueduct, even with the additional head proposed, and with the water as low in the river as it has been during this and last winter. 4th. The land should be secured at once for the new canal and reservoirs named and calculated for as part of the whol plan costing the one and a half million of dollars when finished ; but the work upon one reservoir and the lower end of the new canal need not be commenced till proof of approaching need is visible. Much relief from the present water difficulties may be obtained by the expenditure of a less suni now, by adding to it from time to time as additions to the works may be necessary. If however the present low winter level of water in the river should continue, the work on the large a([ueduct may proceed till completed. ANOTHER VIEW OF THE CASE. Other means of escaping from the difficulties of the water (question have been fi-eely spoken of; and may be considered as only postponing the expenditure of over one half of the cost of the new canal throughout and the two new reservoirs. In this connection it has been argued that, the new entrance to the Rock-cut and one of the reservoirs, with another steam engine, would answer every purpose for several years, and avoid the loss of interest which would be involved by the expenditure of the whole of the one and a half million dollars within the next seven years. It may be said in reference to such a proceeding, that what- ever is expended on the new entrance and the reservoir may fairly be considered as part of a reliable project for future comple- tion, and good value for the cost as far as it goes. Putting up a second engine should not be entertained hastily ; all other avail- able means should be first exhausted. With the rapids of the St. Lawrence at hand there should not be any further necessity for steam power. THE FUTURE OF THIS CITY. It may not be saying too much for the City of Montreal, to assume that ere long the extension of its limits will demand a !"S2!25Er?5rrTl! groat additional water supply, and require the prompt execution of such works as will give the (juantity. Such an event should now he looked forward to, and the Council should he encouraged to adopt an eidarged project which would afford ample moans to meet the case when Hnished. It may not fall to the lot of many of the present administrators of civic affairs to live to see our fair city douhlo its jiopulation and wealth in the next, as it has during the past fifteen years. Yet there is not the least doubt such will be seen ; indeed more may be realized if the proper direction onward is given to the natural and artificial advantages enjoyed. Attention is now being directed to the long needed improvements in the water and rail connections between this city and the parts of the country which are in more immediate connection with it ; the proper development of which, and its resources, must serve to build up this city more rapidly. While legislative and municipal progress tends to a proper provision for future greatness, there is every reason to beheve that the City Council wiU not remain behind the age, by the adoption of any merely partial remedy for the difficulties experi- enced in the city water supply, which would only put off the evil day ; but, on the contrary, it is confidently expected, that a reliable and permanent means of relief will be adopted, which may progress in sections as required, will be creditable to the Council, and prove satisfactory to the citizens. . t MAP AND DRAWINGS. The accompanying map of the aqueduct as it is, and the proposed changes or new canal as copied from the plans of the Water Department, are given for public information, without assuming any responsibility in reference to the proposed position, size, character or cost of the work. The details and location should be a matter for the investigation and supervision of the best and most rehable engineering skill the city can command. The drawings of sections of the present aqueduct, will enable readers to judge more clearly of the difficulties which have to be met in consequence of the ice obstructions in such a small canal. .,'*■■'. 26 And the difliciilties of supplying the (luantity of water required to drive the wheels and pumps through such a small water way as that which is shewn to bo all that existed, on the dates the test measurements were made by the Water Works engineers. 1 ■