Town of Newton annual report 1890, Part 18

Author: Newton (Mass.)
Publication date: 1890
Publisher: Newton (Mass.)
Number of Pages: 680


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7,800 l. ft.


4 00


31,200 00


2 75


21,450 00


1 00


7,800 00


2 50


19,500 00


1 15


8,970 00


216 in. Chapman Valves with gate- boxes and connections, . . . .


130


12 00


1,560 00


10 00


1,300 00


7 50


975 CO


10 00


1,300 00


5 50


715 00


=


Laying 20 in.iron pipe and removing the same, .


2,000 l. ft.


40


800 00


1 50


3,000 00


40


800 00


1 50


3,000 00


1 00


2,000 00


Total bid,


$100,608 00


$106,635 00


$57,580 00


$116,055 00


$59,690 00


44


REPORT OF CITY ENGINEER.


The second proposals received, not being satisfactory to the Water Board, they voted to reject all bids, and instructed the City Engineer to take charge of the work at the filter basin and conduit, either by day work or by contracting such portions as he may deem proper.


In accordance with these instructions, proposals were received for furnishing various classes of materials to be used, and contracts placed.


A contract was made with Charles H. Hale of Newton, for furnishing labor and tools for the trench work and for grading, and with S. A. Piper of Newton, to take charge of the carpenter work.


The following prices were paid for the various classes of labor, including tools :


Superintendent, $5.00 per day of 10 hours.


Foremen, $3.00 per day of 10 hours.


Carpenters, $2.00 to $3.50 per day of 9 hours.


Machinists, $2.00 to $3.00 per day of 10 hours.


Blacksmiths, $2.50 per day of 10 hours.


Engine drivers, $2.00 to $2.50 per day of 10 and 12 hours.


Bracers and drivers, $2.25 per day of 10 hours.


Labor, $1.75 per day of 10 hours.


Assistants from this office were detailed to take charge of and act in the following capacities on the work :


William P. Morse, resident engineer, in charge of work. Fred O. Doane, assistant, in charge of pipe driving, developing and connecting the wells into the conduit.


Charles Temperley, time-keeper and rod-man.


Harvey A. Hanscom, rod-man and clerk.


James E. Cahill, superintendent of the work and machinery.


S. A. Piper, superintendent of carpenter work.


Richard Kerrivan, foreman in machine and pipe fitting shop.


45


WATER DEPARTMENT.


Work was begun on May 14th, 1890.


The site of the conduit, and for a distance of about thirty feet each side, was cleared of wood, brush and loam, and a temporary roadway constructed on the westerly side, to gain access to the work by teams.


Temporary buildings were constructed, as follows :


A carpenter shop, fitted up with a vertical steam boiler and engine, operating by means of shaft and necessary . counter-shafts and fittings, one swing cutting saw, one split- ting saw, and one power borer.


A pipe machine shop, adjoining carpenter shop, and supplying with power, from the main shaft of the latter, the pipe cutting and drilling machines.


An engineer's office.


A blacksmith shop complete, and a horse shed with storage shed attached.


A temporary line of two and one-half inch galvanized iron water pipe was connected with the main water pipes, and was run from the pumping station grounds across the river, parallel with line of the proposed work to Kendrick street. This pipe was used as a main to supply water for the steam boilers, charging the pumps, and for use in driving wells.


A line of pipe wells were driven on each side of the conduit line, four and one-half feet out from the centre line, and about thirty-three and one-half feet apart on a side. These were galvanized wrought iron pipes, two and one-half inches in diameter, connected with screw couplings, and were driven with open ends.


The bottom section of each well consisted of an extra heavy coupling on the lower end of a perforated pipe, which was galvanized after being perforated, and varied in length from six inches to three feet, according to the thickness of the water bearing strata into which they were driven.


The perforations were one-fourth inch in diameter,


46


REPORT OF CITY ENGINEER.


reamed out to three-eighths inch on the outside, and set equi- distant apart around the circumference of the pipe, in number about eighty-five holes to the running foot.


As the supply of water to the city had to be kept up when the consumption was the greatest, the first section of wells, for a distance of 500 feet along the line of the conduit were ganged together at the surface of the ground by a line of six-inch wrought iron screw pipe, laid on each bank of the trench, connected to the wells by branches, flanges and short pipes ; and connecting by eight and ten inch pipes a pumping plant capable of raising 1,000,000 gallons per day.


A temporary dam was constructed on the north side of the old dam in the middle of the filter gallery, and a line of twenty inch cast iron water main was laid from the section of the filter basin north of the dam, a distance of 1,092 feet to pumping plant for driven wells, leaving a branch through which water from a ten inch centrifugal pump was pumped.


The main was laid to a grade on the surface of the ground with joints caulked with jute packing dipped in cement.


A ten inch centrifugal pump was fitted up at the south end of the old basin, and so arranged as to pump either into the river or into the supply of the city by connection with the twenty inch main, the latter arrangement being used only at night when the water was clear or when the needs of the city demanded it.


A 10x14x16 Knowles pump was set up and connected with the thirty-two wells ganged together, and connections made to discharge into the twenty inch main.


This pump served a three-fold purpose : 1st, furnishing the city with clear water ; 2nd, lowering the ground water in the ditch, preventing in a measure the inflow of the quick- sand ; 3rd, the development of the wells connected, and con- tinuous pumping clearing out all fine sand, and increasing the flow by the enlarged cavity or water storage area around the lower section of the wells.


47


WATER DEPARTMENT.


The pumping plant used on the work was one 1,000,000 gallon Knowles tank pump, one ten inch and two six inch centrifugal pumps. The amount of water to be handled was found to be nearly equal to the full capacity of the pumping outfit.


The trench for conduit was excavated twelve feet wide and on an average fifteen feet deep. The dimensions of the bracing, sheathing, etc., was as follows :


Sheathing, spruce, two inches by eight inches to twelve inches by sixteen feet long.


Rangers, spruce, six inches by six inches by eighteen feet to twenty-four feet long.


Braces, spruce, six inches by six inches.


The sheathing was driven by hand, the rangers were put in four feet apart and braces set eight to ten feet apart.


Manholes were placed in the line of the conduit about 260 feet apart and at all angles. They were of the same width as the conduit and eight feet in the clear in length. Double frames were put in the conduit at each end and four hard pine frames, forming grooves for two sets of four inch stop planks were put in the centre of manholes and set at right angles to the conduit line.


Cast iron stop plank grooves seven feet long were set on the frames and bedded in the walls of the manholes which are twelve inches thick and composed of cement concrete, having one part American cement, two parts sand and five parts stone, brought up from the bottom of the trench to within two feet of the finished grade. The walls of the upper two feet are brick upon which is fitted a cast iron frame and cover.


In order to provide space so that the water in the conduit can be pumped out, the bottom of the manholes are constructed from two inches to fourteen inches below the level of the conduit.


48


REPORT OF CITY ENGINEER.


While it was not intended to construct any portion of the conduit in the old filter basin until the summer of 1891, as the work progressed it was found that the portion between the dam and new conduit could be constructed at much less expense while the pumps were set up, and it was decided to go on with the work, and 732 feet of conduit was laid in the old filter basin.


A description of the rigging used for driving the well tubes may be of interest. The hand driving rig consisted of a tripod having legs about twenty feet long, made out of pieces of one and one-half inch wrought iron pipe joined together with a bar run through the top part of a T coupling, screwed to one end of the pipes.


The bottom ends had a shoe, consisting of a broad cap. To the bar at the top was attached an iron well wheel, over which a rope was passed and used to raise a cast iron ham- mer, weighing about 115 pounds. In the centre of the hammer was inserted an oak plug about two inches in diam- eter. To the oak plug a steel guide rod four feet long and seven-eights inch in diameter was attached. On the top of the well tube was screwed a heavy steel drive cap, with a hole in the top large enough to receive the guide rod. Three men constituted a well driving gang, two to operate the weight, and one lead man to keep the pipe screwed up, and watch the progress of the driving, and the character of the material driven through.


For driving the deep wells a heavier rigging to be operated by steam power was purchased from the American Well Works of Aurora, Ill., with which we were able to do fairly effective work. By a more compact arrangement of the derrick it can be made much more effective, and I believe can then be used with economy on light work, where any considerable amount of work is to be done. As it was, after charging to the work performed twenty-five per cent. of the cost of the rigging for depreciation in value, the cost


49


WATER DEPARTMENT.


per foot for the deep well work was but little more than the cost of the shallow wells driven by hand.


The wells were cleaned out and developed by means of a water jet, under considerable pressure, being forced through a three-fourths inch or one inch wrought iron pipe, and dis- charged near the bottom of the pipe well about a steel drill point, by means of two one-fourth inch holes one on each side of the base of the drill, which was screwed to the wrought iron pipe.


The water jet would force to the surface the gravel and sand in the pipe and just below it, and leave the well when fully developed with a more or less open space about its lower end, making a ready passage for the water from the ground to the well.


Along the line of the new conduit there were driven 127 completed wells.


No. of wells driven by hand power, . 98


No. of wells driven by steam power, . 29


No. of feet of wells driven by hand power, 5,204


No. of feet of wells driven by steam power, 2,664


Maximum length of wells driven by hand power, 114 ft.


Maximum length of wells driven by steam power, 130 ft.


Minimum length of wells driven by hand power, 28 ft.


Minimum length of wells driven by steam power, Average length of wells driven by hand power, . 53.1 ft.


68 ft.


91.86 ft.


Average length of wells driven by steam power, Cost per foot of wells driven by hand power, in- cluding cost of pipe, couplings, developing wells, etc., . $0 83


Cost per foot of wells driven by steam power, in- cluding twenty-five per cent. of cost of rig- ging for depreciation in value, . $0 86


Elevation of top of wells above city base, . 95


Elevation of bottom of deepest well below city base, . -35


4


50


REPORT OF CITY ENGINEER.


Elevation of bottom of shallowest well above city


base, . 67


Average elevation of bottom of wells above city base, . 4.14


Along line of the conduit laid in the old filter basin there were driven by hand power forty-seven completed wells.


Maximum length of wells driven by hand power, Minimum length of wells driven by hand power, No. of feet of wells driven by hand power, Average length of wells driven by hand power, . Cost per foot of wells driven by hand power, in- cluding cost of pipe, couplings, developing, etc., . $0 59


Elevation of top of wells above city base, . 93.00


Elevation of bottom of deepest well above city base, . 44.00


Elevation of bottom of shallowest well above city base, . 71.50


The city base, as relates to elevation of grades is tide marsh level in Boston harbor.


The accompanying schedule, sheet 2, shows a compari- son of the cost of the filtering conduit as actually done, with the cost as per prices in bids received from contractors, April 18th and 25th, with actual quantities.


49 ft. 21 1-2 ft. 1,628 34.64 ft.


SHEET TWO .- Table showing cost of whole Filtering Conduit compared with prices in Bids received by the Water Board.


ESTIMATED COST OF THE WORK AS PER PRICES IN BIDS RECEIVED BY THE WATER BOARD.


Bids received April 25, 1890.


Bids received April 18, 1890.


ITEMS.


Quantities.


COST OF THE


WORK AS DONE


BY THE CITY.


Moulton, O'Mahoney & Trumbull, of Lawrence.


E. F. Brigham & Co., of Cambridge.


C. P. Horton, of Boston.


E. F. Brigham & Co., of Cambridge.


C. P. Horton,


of Boston.


a


Loam Excavation .


3,150 c. y. $ 62


$1,959 52


$ 38


$1,197 00


$ 60


$1,890 00


$ 25


$787 50


$ 1 00


$3,150 00


$ 25


$787 50


b


Selected Material .


7,446 c. y.


1 15


8,324 42


1 25


9,307 50


1 00


7,446 00


75


5,584 50


75


5,584 50


75


5,584 50


C.


Rock Excavation .


72 c. y.


96


68 99


2 50


180 00


6 00


432 00


8 00


576 00


5 00


360 00


8 00


576 00


d


Conduit (exc. pump.)


2,952 ft.


14 41


42,533 31


25 28


74,626 56


31 00


91,512 00


18 50


54,612 00


34 00


100,368 00


18 50


54,612 00


e


Manholes (set iron) (driven by hand)


10


105 45


1,054 47


165 00


1,650 00


125 00


1,250 00


75 00


750 00


125 00


1,250 00


75 00


750 00


f Pipe wells, connect. (driven by steam)


6,832 ft. 9,496 ft. 2,664 ft. 162


77


5,281 82


4 00


37,984 00


2 75


26,114 00


1 00


9,496 00


2 50


23,740 00


1 15


10,920 40


Chapman Valves, etc.


8 28


2,281 46 1,340 59


12 00


1,944 00


10 00


1,620 00


7 50


1,215 00


10 00


1,620 00


5 50


891 00


Laying 20 in. pipe .


1,092 ft.


48


458 00


40


436 80


1 50


1,638 00


40


5,436 80


1 50


1,638 00


1 00


1,092 00


Total of Contract


$63,302 58


$127,325 86


$131,902 00


$73,457 80


$137,710 50


$75,213 40


Iron Work to be furnished by City


731 50


731 50


731 50


731 50


731 50


731 50


Engineering and office expenses


2,996 38


2,996 38


2,996 38


2,996 38


2,996 38


2,996 38


TOTAL COST of the Work


$67,030 46


$130,053 74


$135,629 8S


$77,185 68


$141,438 38


$78,941 28


86


52


REPORT OF CITY ENGINEER.


New Pumping Engine and Boilers.


Specifications and forms of contract were prepared for furnishing and erecting a new pumping plant capable of de- livering 3,000,000 to 5,000,000 U. S. gallons of water from the pump well into the new reservoir, and of giving a duty of not less than 100,000,000 foot lbs. per 100 lbs. of combus- tibles upon twenty-four hour test. The class of and design for engines and pumps was left to bidder, the piston speed being limited to 120 feet for horizontal, and 250 feet for crank and fly wheel type engine. Proposals were received by the Water Board April 25th, 1890, from George F. Blake Manufacturing Co., of Boston, Mass., from Arthur J. L. Loretz, of Brooklyn, N. Y., from Henry R. Worthington, of N. Y.


The accompanying sheet shows a canvass of the propo- sals received, and the contract was made with George F. Blake Manufacturing Co., on June 6th, 1890, for a high duty pumping engine and two boilers.


The pumping engine contracted for is to have a capacity of five million gallons per twenty-four hours delivered at the new reservoir on Waban Hill with a piston speed of not over 250 feet per minute.


It is to be a direct acting, fly wheel, cross compound engine, steam cylinders twenty to twenty-four inches and forty to forty-eight inches, with pump plungers thirteen and one-half inches in diameter, stroke forty inches, Corliss type of valve gear, with independent eccentric on the low pres- sure inlet and exhaust valves, and automatic governor on the high pressure inlet valve gear only.


The contract price for the pumping engine set up com- plete is $17,431.00.


The two boilers to be of the Belpaire locomotive fire box type, each one eighty-four inches in diameter, thirty feet long, and capable of furnishing sufficient steam at 150 lbs. pressure to operate the engine at its fullest capacity.


53


NEW PUMPING ENGINE AND BOILERS.


Contract price for the two boilers, all set up in the boiler house, $15,790.00. This includes all necessary feed pumps, furniture and fittings. The city is to put in the foundation for the engines at its own expense.


The engines and boilers are to be tested separately. The guaranteed duty of the engine is 115 million foot pounds. The boilers are to evaporate not less than eleven pounds of water per pound of combustible, exclusive of the effect of a feed water heater.


54


SHEET THREE .- Canvass of Bids for High Duty Pumping Engine and Boilers Received April 25, 1890.


NAME OF BIDDER.


One 5 mil. gal. High


Duty Pump Engine.


One 3 mil. gal. High


Duty Pump Engine.


Two Belpaire Loco-


motive Firebox


Two Underfired Re-


turn Flue Boilers.


Two complete com-


bustion, Locomotive


l'ype Firebox Boilers.


Two complete com-


bustion, Regular


Total bid.


Pumping capacity.


Guaranteed duty.


George F. Blake Manufac- turing Co., of Boston, Mass.


$17,431


14,314.


$8,583


$11,665


29,096


5


66


115


66 66


66


17,431


17,431


$14,250


9,215


4,814


19,065


3


66


112


14,250


7,765


22,015


3


66


112


66 66


Guaranteed duty, 115 and 112.


14,250


7,165


21,415


3


66


66


112


66


66


66


Arthur J. L. Loretz, of Brooklyn, N. Y.


21,000 20,000 18,000


15,500


7,500


Total,


25,500 28,500


5 mil. gals.


110 mil. ft. lbs.


Duty 110, 105.


13,500


Total,


21,000 23,000


3


105


Henry R. Worthington, of New York.


Duty 105.


21,800


24,700 19,300


54,450 5 mil. gals.


41,100


3 « «


105 mil. ft. lbs. 105


Contract as awarded to the Geo. F. Blake Mfg Co. Duty 115.


17,431


15,790


33,221 5 mil. gals.


115 mil. ft. lbs.


66


66


23,465


3


66


66


112


14,250


$'0,565


27,996


5


REPORT OF CITY ENGINEER.


$31,746 5 mil. gals.


115 mil. ft. lbs.


17,431


26,145 5 «


115


115


Pattern Boilers.


29,700


Boilers.


55


WATER DEPARTMENT.


Covered Reservoir.


Plans and specifications for constructing a covered masonry reservoir were prepared. The letting of the pro- posed work was advertised, and proposals asked for, which were received and opened by the Water Board, May 18th, 1890.


From John H. Leavitt, Boston, Mass., and amounted to $37,681.00.


From W. H. Mague, Newton, Mass., and amounted to $39,906.68.


From Moulton, O'Mahoney & Trumbull, Lawrence, Mass., and amounted to $39,948.10.


From George M. Atkins & Co., Palmer, Mass., and amounted to $40,005.00.


From D. Henry Cram, Boston, Mass., and amounted to $41,435.61.


From Thomas Rowe, Newton, Mass., and amounted to $41,586.25.


From Howard Coon & Co., Boston, Mass., and amounted to $47,316.50.


From W. A. Ward, Lowell, Mass., and amounted to $53,201.00.


From Smith, Mahoney & Dorman, Lawrence, Mass., and amounted to $65,490.15.


The contract was awarded by the Water Board to Mr. John H. Leavitt, of Boston, Mass. Before the execution of the contract, it was assigned with the consent of the Water Board to Mr. W. H. Mague, of Newton.


The accompanying sheet shows a comparison of the bids received.


56


REPORT OF CITY ENGINEER.


SHEET FOUR .- Canvass of Bids for Building Covered


ITEMS.


Quantities.


Thomas Rowe, Newton.


Moulton, O'Mahoney & Trumbull, Lawrence.


W. A. Ward, Lowell.


a


Removing loan to spoil bank, . .


1,500 c. y.


$ 23


$345 00


$ 22


$330 00


$ 30


$450 00


aa


Placing loam,


2,500 c. y.


34%


862 50


32


800 00


50


1,250 00


b


Sodding, .


3,000 c. y.


46


1,380 00


35


1,050 00


60


1,800 00


c


Excavation,


4,500 c. y.


52


2,340 00


43


1,935 00


70


3,150 00


cc


Additional haul for 100 ft.,


100 c. y.


01


1 00


01


1 00


05


5 00


d


Rock excavation, .


50 c. y.


1 15


57 50


70


35 00


1 00


50 00


c


Puddle,


125 c. y.


3 16


395 00


2 00


250 00


3 00


375 00


f


Broken stone,


150 c. y.


2 88


432 00


2 50


375 00


4 00


600 00


g


Permanent timber,


10 M.ft. B.M.


46 00


460 00


38 50


385 00


30 00


300 00


h


Portland cement, .


10 bbls.


3 15


31 50


2 65


26 50


3 30


33 00


i


Concrete masonry,


850 c. y.


6 90


5,865 00


6 25


5,312 50


8 50


7,225 00


j


Brick masonry,


530 c. y.


17 25


9,142 50


18 00


9,540 00


15 00


7,950 00


k


Rubble stone masonry, .


3,000 c. y.


5 17


15,510 00


5 25


15,750 00


8 00


24,000 00


1


Portland cement plastering, .


900 sq. y.


58


522 00


33


297 00


1 00


900 00


11)


Coal tar coating,


2,200 sq. y.


23


506 00


10


220 00


50


1,100 00


11


Granite coping,


40 1. ft.


3 45


138 00


2 85


114 00


2 00


80 00


2n


Granite edge stones,


580 1. ft.


1 75


1,015 00


2 60


1,508 00


2 35


1,363 00


31


Granite steps, .


30 1. ft.


17 25


517 50


12 85


385 50


12 00


360 00


4n


Granite trimmings,


6 c. y .


28 75


172 50


44 00


264 00


30 00


180 00


511


Granite blocks,


5 c. y.


17 25


86 25


15 00


75 00


20 00


100 00


o, Add. price for Am.cem. mortar,Itol,


20 c. y.


86


17 20


78


15 60


1 00


20 00


p


Portland


66


250 c. y.


2 00


500 00


1 60


400 00


3 00


750 00


2p


66


66


1to2,


250 c. y.


1 15


287 50


1 06


265 00


1 50


375 00


3p q r


66


66


66


1to3,


50 c. y.


87


43 50


78


39 00


1 00


50 00


Drainage tiles,


2,100 l. ft.


09


189 00


07


147 00


25


525 00


Laying 24 in. water pipes,


100 1. ft.


58


58 00


88 00


40


40 00


2r


20 4


66


200 1. ft.


57


114 00


62


124 00


30


60 00


3r


12 4


40 l. ft.


57


22 80


40


16 00


25


10 00


S


Setting iron work in gate chamber,


1


575 00


575 00


200 00


200 00


100 00


100 00


Totals, .


$41,586 25


$39,948 10


$53,201 00


57


WATER DEPARTMENT.


Masonry Reservoir, Received May 16th, 1890.


Howard, Coon & Co., Boston.


Smith, Maho- ney & Dorman, Lawrence.


W. H. Mague, Newton.


George M. At- kins & Co., Palmer.


Jobn II. Lea- vitt, Boston.


D. Henry Cram, Boston.


$ 25


$375 00


$ 50


$ 750 00


$ 25


$375 00


$ 50


$750 00


$ 25


$375 00


$ 24


$360 00


40


1,000 00


75


1,875 00


30


750 00


50


1,250 00


29


725 00


30


750 00


45


1,350 00


75


2,250 00


72


2,160 00


40


1,200 00


38


1,140 00


75


2,250 00


60


2,700 00


75


3,375 00


53


2,385 00


55


2,475 00


43


1,935 00


57


2,565 00


05


5 00


15


15 00


02


2 00


01


1 00


01


1 00


01


1 00


2 75


137 50


2 50


125 00


2 00


100 00


1 00


50 00


1 50


75 00


2 50


125 00


4 50


562 50


3 25


406 25


3 50


437 50


1 00


125 00


3 00


375 00


4 75


593 75


3 50


525 00


5 00


750 00


3 50


525 00


3 00


450 00


3 95


592 50


4 00


600 00


45 00


450 00


37 50


375 00


35 00


350 00


30 00


300 00


30 00


300 00


35 00


350 00


3 50


35 00


3 25


32 50


2 75


27 50


3 50


35 00


3 00


30 00


3 10


31 00


6 75


5,737 50


7 50


6,375 00


4 85


4,122 50


6 00


5,100 00


6 25


5,312 50


5 75


4,887 50


16 00


8,480 00


32 50


17,225 00


14 25


7,552 50


12 00


6,360 00


15 50


8,215 00


14 75


7,817 50


6 40


19,200 00


8 50


25,500 00


5 63


16,890 00


5 85


17,550 00


5 35


16,050 00


5 50


16,500 00


1 25


1,125 00


50


450 00


27


243 00


40


360 00


50


450 00


40


360 00


23


506 00


25


550 00


22


484 00


03


66


10


220 00


23


506 00


2 15


86 00


6 25


250 00


2 23


89 20


3 00


120 00


3 00


120 00


2 95


118 00


2 45


1,421 00


4 00


2,320 00


2 75


1,595 00


2 00


1,160 00


75


435 00


1 98


1,148 40


12 00


360 00


18 75


562 50


12 85


385 50


13 00


390 00


8 00


240 00


14 90


447 00


37 00


222 00


50 00


300 00


38 33


229 98


50 00


300 00


20 00


120 00


56 66


339 96


37 00


185 00


35 00


175 00


38 50


192 50


25 00


125 00


20 00


100 00


54 00


270 00


1 60


32 00


1 87


.


37 40


35


7 00


75


15 00


1 00


20 00


15


3 00


5 80


1,450 00


4 00


1,000 00


75


187 50


2 50


625 00


1 00


250 00


75


187 50


3 00


750 00


2 50


625 00


60


150 00


2 00


500 00


1 00


250 00


50


125 00


2 00


100 00


2 25


112 50


40


20 00


1 50


75 00


80


40 00


40


20 00


10


210 00


20


420 00


06


126 00


15


315 00


04


84 00


15


315 00


50


50 00


44


44 00


60


60 00


40


40 00


40


40 00


1 05


105 00


40


80 00


40


80 00


50


100 00


30


60 00


37


74 00


92


184 00


30


12 00


25


10 00


25


10 00


20


8 00


30


12 00


65


26 00


260 00


200 00


500 00


500 00


350 00


350 00


200 00


200 00


100 00


100 00


450 00


450 CO


$47,316 50


$65,490 15


$39,906 6S


$40,005 00


$37,681 00


$41,435 61


58


REPORT OF CITY ENGINEER.


The reservoir is substantially a rectangular chamber 125 feet wide, by 172 1-4 feet long, and fifteen feet six inches deep, with rubble masonry walls, and an arched brick cover- ing. At the northwest corner is located the gate-chamber, which is circular, thirty feet inside diameter, and cuts off this corner of the reservoir. The ultimate design is to have this gate-chamber form the centre of a four sectioned reservoir, of which the reservoir now building would be the southeast quarter. All the water mains for inlet and outlet are brought to this central chamber, in which are located all the gates for regulating the flow of the water into or out of any one of each of the four sections, and have an ultimate storage ca- pacity of about 10,000,000 gallons. This chamber is built with extra thick walls, so as to form a foundation for the high-service stand pipe, recommended to be built later, in the report to the City Council made in December, 1889, for increasing the efficiency of the fire protection in the upper levels of the city.


The location of the reservoir on the hill top was selected in such a way that all the foundations and the bottom of the reservoir should everywhere be on solid ground. The bottom of the reservoir being about grade 305, it is in all cases inside the 305 contour of the hill.


The walls of the reservoir are founded on hard pan at grade 302, being seven feet two inches, to seven feet ten inches thick for a height of four feet, thence narrowing to a thickness of from two feet six inches, to five feet two inches on top. The walls on the north and west sides, which will eventually form one side of the other sections of the large reservoir, have been built with a double face and a batter of one in twelve on each side. The east and south walls have been faced and battered on the inside only, and stepped off on the outside. The circular walls of the gate- chamber have been carried up double-faced and plumb on both sides seven feet six inches thick. All these walls are




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