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Municipal Water Supply 1939 - - - ... .i . -I REPORT -'l:'. on the MUNICIPAL WATER SUPPLY CITY OF SALINA, KANSAS .. .- '- ~ Excerpt from Report Dated August 1939 By PaQlette & Wilson, Salina, Kansas ti I ! . fi WILSON & COMPANY ENGINEERS & ARCHITECTS SALINA ~~ KANSAS August 1956 . . " - " SALINA, KANSAS ENGINEERS REPORT on the MUNICIPAL WATER SUPPLY &: PROPOSED WATER SOF'l'ENING PLANT 1 - ,. PART I ... GENERAL INFORMATION 1-.. This report has been prepared for the purpose ot studying the adequaoy of the souroe of the City' 8 water supply and of determining the most eoonomioal and desirable method of softening it. To simplify the study of this report, it has bEfen separated in four prinoipal parts, as followsl Part II A general outline of the prooedure followed in the preparation 6 of the report is given. This seotion also inoludes a brief review of the history of the plant, and a study of the population trend of the City . of Salina, with an estimate of the future water requirements. Part III A detailed study is made of the souroe of supply, inoluding an analysis of all ava~lable data on private wells. and test holes which have been drilled during recent years in the Smoky Hill Valley between Mentor and the North oity limits of Salina. This seotion also disousses tests of the present oi ty wells and pumping equipment to determine their capaoi ty % and effioienoy. From these data, definite oonolusions are reaohed regard- ing the adequaoy of the supply, end reoommendations are made regarding future well development-. This is followed by a disoussion of the number of wells needed in the future, the reoommended layout for the low servioe . piping, and the estimated oost of the proposed improvoments. -1- . Part 1111 This seotion is the report on a proposed water softening plant for the City of Salina, whioh inoludes a study of the ohemioal analysis of the City water and information regarding the various possible methods of removing the hardness. Eaoh method is disoussed separately, desoribing the plant required, and estimating the cost of oonstruoting and operating eaoh type of plant. Based on those facts, definite reoom- mendations are made regarding the type of water softening plant bost suited to the conditions existing in Salina. Information is also given on the savings and advantages to be expeoted from a softened supply. Part !VI A synopsis is given of the entire report, surnrnarizing the longer disoussions, and emphasizing the oonclusions and results derived from the detailed study. This includes a review of the proposed future development of the source of supply, and recommendations regarding the most sui table type of water softening plant, together with a brief' tabu- lation of construotion and operating oosts. HISTORY A more oomprehend ve study of the problems at hand can be made if the facts are known regarding the history of' the existing water works system. ,- .... & The original water works system was installed in 1883 by the American Water Supply Company. It was oporatod by that oompany \mtil 1926 when it was purchased by the City 0 f Sa.lina and sinco that time ba. been operated as a munioipal utility. The original pumping station was a brick struoture 57 ft. x 33 ft., which housed tho steam pumps and the first boilor. During 1916 an additional boiler roam was added to the north and a new boilor installed. This ~ -2- building was oonstruoted of soft briok and the hip roof was oovered with sheot metal. In 1934 the building was oompletely remodeled to provide the pleasing appenranoo it has at the prosent ttme. The work oonsisted of faoing tho struoture with light oolored faoo briok and providing a ,... flat roef of reinforoed oonorete. .... The existing oiroular oonoreto resorvoir was oonstruoted in 1898. It hnd a wooden roof and was only 12 feet deep nt thnt timo. In 1916, 4 feot was added to the wall height, a oonorete slnb was plnood over it end a sond trap was built along tho south side. Tho capllOi ty of tho reservoir was then 325,000 gallonsJ and is still tho only underground resorvoir available for oolleoting tho oity supply. Sinoe thin reservoir holds loss than one hour's supply during the maximtnn demo.nd of the summer months, it is important that the underground storage faoi11 ties be en- , larged in tho very near futuro. The original steam ptnnpS wero of the displnooment type and were loonted in the ptnnp pit. The first oentrifugal pump, operated by an eleotrio motor, was installed on the main floor of the ptnnp house in 1918. This one ptnnp supplied praotioally all the water to the City for the next 8 years. The steam ptnnpS were kept merely ns a standby to provide ad- o ditional pressure during fires and at times of exoessive oonsumption. . Addi tional oentrifuga1 ptnnpS with eleotrio motors were added soon after the plant WllS aoquired by the 101 ty in 1926 and the use of tho steam ptnnpS ~ was disoontinued after that timee It is interesting to note tho developmont of the well system. The original souroe of supply oonsisted of one dug well 27 feet in diametor and e:ctending to a point 15 feot below sto.tio wo.tor lovel. Fifty 1-1/2 inoh "3- well points, 50 foot long, wore driven in the bottom of the well to gravel. Tho well was looated ~ediate1y adjacent to tho pUmping building nnd tho suotion Uno ran directly !'rom tho large wall to the steam pump. The small sand points beoame ologged during the next few years and in 1898 a new system of wells was oonstruoted. This oonsisted of 12 wells 10- oated along the bank of the Smoky Hill River and oonneoted to a oonunon suotion line laid 15 feet below ground level, loading direot1y to the steam pumps. These soon proved insuffioient and an additional supply was seoured by sinking four 6 inch wells in the bottom of the original dug well. This arrangement took oare of tho demand until 1913 when diffi- ou1ties with the sand points oonvinood the owners that a different type orwell was required. It was in 1913 that the use of gravel wall wells was first attempted. Twelve or this now type or well were oonstruoted in that year, all of them looated on the water works property dirootly south and west of the pumping station, spaoed at intervals or approximately 70 feet. Theso original gravol wall wells were small, using nn outer casing only 12 inohes in diwmeter with a 6 inoh inner casing, leaving a 3 inch gravel wall surrounding the strainer. Aftor the inner casing and gravel were in placo the outer oasing was removed. The twelve wells wero operated on a conunon suction line leading diroot1y to tho steam pumps. This systom of well oonstruotion proved to bo suocessful, but operating diffioulties arose when tho water level was lowered, since the suotion line or tho pump was oonneoted direotly to the well., The present policy of seouring the water supply from individual wolla of high capaoity was begun in 1916. Those wells have outor casings 11 ,. .... -4- .. varying fran 24 inohes to 48 inohes in diameter, with inside casings and strainers of suoh a size that about 6 inohes of gravel is provided. Tho outer casing is removed after the gravel and strainer are in place. Wells No. 1 and No. 2 whioh were construoted in 1916, have sinoe been abandoned and rop1aoed with newer wells. Well No.3, located on the pumping station property, was oonstruoted in 1919 and is still in use. In 1924, Well No. 4 was oonstruoted. Well No. 5 in 1930J Well No.6 in 1932J New Well No. 1 in 1935J New Well No. 2 and Well No. 7 in 1938. The inorease in water oonsumption in Salina has been met during re- cont years by oonstructing new wells as required, and the oonstant increaso in demond, which has now reached an amo\mt in excess of 7 million gallons per day during the summer months, has aroused somo doubt as to the ade- quacy of the supply. This subject has been thoroughly investigated and will be fully discussed later in this report. From the a.bove review it will be noted that Snlina bas been securing its water from the same general source sinco the plant was first constructed. Therefore, tho City has been aooustomed to the extremely hard water from tho start, which accounts for tho fact that the citizens have had litt10 opportunity to appreciate tho value and advantages of a soft water supply. From time to time there has been some agitation to oorreot the existing conditions but no very definite steps have been taken prior to this timo. In 1931 there was oonsiderab1e interest in the possi- bility of obtaining a supply of natural soft water from the vioinity north of Salina. Howevor, a thorough investigation of this location revealed an inadequato supply and the proposition was abandoned. Reoontly the agi tntion for soft water has again beoome apparent, whioh made it advisablo '.., , .. -,.. , to investigate thoroughly tho possibility of softening tho existing supply. The various methods of softening the existing supply are dis- oussod herein, together with an ostimate of the cost of oonstruoting and operating various types of water softening plants. This report is for tho purpose of presenting oomplete information to the Oity Commission and the Water Works Board regarding the subject of water softening in order that 'they may give logioal oonsideration to the problem. POPULATION &: WATER CONSUMPTION Before going into the study of the City.s water supply and the proposed water softening plant, it is neoessary to investigate the population trend and tho inorease in the per oapita oonsumption, in order to determine the probable futuro requirements of the Oi ty. It sooms logionl to look 20 years ahead in planning Salina'. future water requirementsJ therefore an attempt has been mnde to osti- mate the probable population and the rato of oonsumption in 1960. Population: In tho study of the population trend, tho 10 year reports of the Federal Census Bureau since 1870 have boon plotted. Thoso reports shaw a steady and surprisingly uniform increaso in the population of Salina throughout the 60 yoars covered by tho Fedoral Census. The inoroase in population during the 10 year period following 1890 was belaw the average, whilo the 20 yoars following 1910 sh~red an inorease above the average, but throughout tho 60 years an average inoreaee of 3200 persona per 10 year period has boen maintained. Therefore, it 80ems logioal to assumo that n similar inorease may be expeoted during the next 20 years whioh will make the City's population in 1960, based on a straight line average, nmount to 30,000 '.. . . ..6- ... '" I' ... -7- t P~CENT INCREA$~ I POP U L A T ION 1910 to 1938 o I T Y I I Reduced to I 1910 1920 1930 1938 28 Yrs.: 22 Yr. basis I 1. Kansns Oi ty I 82.331 101,177 121,857 126,648 53.8% I 42.~ 2. Wi chi to' I 52,450 72,217 111,110 105,324 100.9% I 79.2/0 3. Topeka I 43,684 50,022' 64,120 76,540 75.3% I 59.2/0 4. Hutchinson . 16,364 23,298 27,085 32,683 99.8% . 78.lJ% .... 5. Saline. I 9,688 15,085 20,155 21,587 122.9'/0 I 96.6% 6. Lenvenworth 19,,63 16,912 17,466 21.126 9.1% I 7.2/0 7. Pittsburg 14,755 18,052 18,145 19,095 29.l.t% I 23.1% 8. o off'eyville 12,687 13,452 16,198 17,565 38.5% I 30.3% I Average growth of the 8 oities -- 66.2/0 I ,1.8% ~ It will be noted that the 8 cities show an o.verage growth of 66.2 peroent during the 28 year period and this is equal to an average grO\orth of 51.8 peroent in 22 years. Therefore', basing Salina's growth during the next 22 years on the average growth exporienoed by the 8 largest oities in Kansas during the past 28 years, Salina's popu1ntion in 1960 is expected to shoW an inorease of 51.8 peroent whioh would ma.ke a popu1a.tion of 32,800 in 1960. It will be noted that this deduotion substantiates the previous one and, therefore, it is believed that the ostimnte of 30,000 for the probable 1960 population is conservative and that it is the lowest estimnte that oan safely be oonsidered. , ... -8- _ 25,000 ." \ .. _._3SpOo.: . I I. ...11 . . , I I , #1 I , I "'4'~ i ~. L_l- IL ..~1-"'-i-- ~'~_J....:i ~ " ' i / ! / i 9-ot ... ." I i tig( ~ I I 'i'-aY V/ Iii I I.rg!): V i I /r' I I. l J; /7 i L/._, I : 7, /;1 I " , f'+_-F I..l 'f"~'h (J.! i~ ,f" "h :" ~ H'I'}.I !',l ~ '.r,l:rc" -1-;.,,,; I-I-f.::f. I or ''''-+-''''-'/1 -H + . --.I - H I[ ,I-I .1.1 rd' ':; fl 't' + j... f'r ~. j vf' J I.. +~r-! -I-t.-;"l ~-~ I II '..t) ~~ ~\':" -- .l_"l ,/ ,...,t j, I j.. r' I . I 1 I ' -7/- ~-' -, -1--'::..' __.L ~ 1..~.:-Lj~'_ - - - ....;.. ._~ . -I'~- J. :~-~~- ,_~_J 1"-t ,~ ~'l 1 I f-tff"I-dJ"fIot'-~~:'1 or: '.,! ~ 1~'1 '. j I -+tl" /" I ! II " "" I I ../ . .....:: I'. I I. I <:) ~ I /1, ..33,000 , I ! ':31,000 ~. ..1. .. .... ... 30,000.. : a, -" I / i . I -" I y;a v~/ i 7'[ I i I I Yqi.' . I .__n_ A' I . /. I i. ~...' /",-" i ! '. ;f/..~/ ../ . ",,/ I. I 1 i i ! -_ .Jc:loao;-___. ~l I 2.0,000 15, 000;. , i I ~ !1:! o'f Pau/eHe SALINA i KANSAS WATe-R,WORKS POPULAT'~N TReND! CVr;v,e, S{1iud- No, I,; ~ . .i,,;;~.lril';:~! 'i 'I I, .,- ~~I:Hl-~-';;:J":lT*-'-. . : I', ',:Iri I . i . ~ , . I' . I. I l ~ ., .J~OOO. . I I ";f:,'- I y '''~ooo ' ~~:r'~. <,.--j" ..--+:~- ... 0 .1 .", ~ d <:) ~ ll;) ~ ~ ~ '" i' I <::) ~ ;'0 Accom <:l ~ . I.. ~ ISl ~ i /9.39 -.. Per Capita Water Consump.tionl A study of the amount of water oonsumed per capita shows that this amount has been steadily inoreasing sinoe 1926. Aoourate reoords are not available prior to 1926, sinoe it was in that year that a Venturi meter was installed at the pumping station. The attaohed Curve Sheet No.2 shows the rate at which the per oapita oon- sumption has inoreased and it also shmvs an estimate of the future demand. The upper ourve on this sheet indioates the average amount of water used by eaoh person on the day of'maxim\ml. demand of eaoh year. It will be noted that less than 150 gallons per oapi ta was used on the days of maxim\ml. demand in 1927, 1928, and 1929, but by 1933 it exoeeded 250 gal. lons per oapita and on the l!~th of July this year it roaohed a new reoord of 330 gallons per oapita. These points have been plotted and a smooth ourve drawn through them. It is difficult to extend the curve onward from this date to anticipate future demands, but it is reasonable to assume that the present rate of inorease cannot be maintained indefinitely. Therefore, a value of 430 gallons per oapita has beon arbitrarily uu{en as the maxim\ml. to whioh the demand will ultima.tely be inoreased by the year 1960, and the line has been extended horizontally from that date, assuming that the demand will romain oonstant after that year. The value of 430 gallons was used as the limit to whioh the per oapita. oonsumption would be inoreased beoause it is beHaved that several faotors will prevont it from exceeding that amount t~ any grea.t extent. One item is the oost of the eXQossive use of water, whioh will eventually set a limit to the amount used. Furthermore, air oonditioning has been one of the important faotors in running up tho high per oapita. oonsumption and it is believed that the amount of water used for this purpose will not be inoreased greatly . ... -9- .... trom the presont demand. The use ot meohanioal refrigerntion un! ts is gradually repla.oing the original units whioh depend entirely on water tor oooling. Howover, due to the oost ot meohanionl refrigoration units, there will always bo a largo numbor of water oooling un! ts in use in the homos of more moderate oiroumstanoes. It 1 a reasonablo to expeot that numerous watorMooo1ing units will be installed in the smaller homes throughout the City at about tho some rate that similar units are replaoed by other types of air oonditioners. Therefore, it seems that the water demand will not be increased grea.tly tor oooling purposes. Hence, it i. believed that the figure ot 430 gallons por oapita should not be oxoeeded greatly, although it is doemed unwise to plan on a per oapita. demand of leas than that amount on tho da.ys ot maximum pumpage. The lower ourve on Curve Sheet No. 2 shows the daily average of tho a.mount of water oonsumed per oapi to. throughout the month of maxi- mum demand of eaoh year. This ourve shows that the averago per oapita oonsumption for the maximum month has inoreased from 100 gnllons in 1928 to about 260 gallons during July of this year, This shows that the average daily per oapi to. use la.gs about 20 peroent below the maxi- mum and on this basis it is expected that tbe ultimate average demand 'Will be about 80 gallons less than the 430 gallons set for the maximum day, maldng the probable daily avera.ge per oa.pi ta oons~ption throughout tho maximum month in 1960 amount to"about 350 gallons. ... , .. -10- Tho souroo of' supply must be suffioient to moet the demand of' the maximum day in the yea.r, as shown by the upper of' tho two ourves. However, the oapaoity of' the softening plant, whioh is oapable of' taking larne ovorloo.d., would not need to bo quite oqual to the maximum daily demond. It is believed that to use the average f'or the month would be .... setting a. per oapi ta. demand eomewhat too low beoause there are of'ten a number of' da.ys in suooossion that would exoeed the monthly avorage. Theref'ore, a third Qurve ha.s boon drawn whioh is about an average be- tweon the maximum day a.nd tho avorage day of' the maximum month. It would; seem that this ourve is a roa.sonable one to use in the design of' a softening pla.nt.. It will be noted that this ourve shows a dC3ma.nd or I approximately 400 ga.llons per oapi ta in 1960. I' -11- -- ,."---L~.gQo.I,.. .:..,.. -.. I. I I I :.25QI I I .; ~ 6 '__'"__4_~ ".,_~ _.. ~_... _ _ ~ I I I , I .., -...L. ;..-"---.-.... ----- I , ! I. J~: '!ii-. t It ; 't. ii, '., _.s~l.;~lANSAS'_.1 . W)jTcJ;!W~J;!K$ I -1-- .': . /l!AXIHUH Pt~;-:/;e4;/~o.~OI(S~.u T/~ ii' ....~~~--;-+..L~.JJ: -~~-~~,J~-~._- ,I 'I~ ;l,r: . . ':; i' l.r+L -, 'r : I r . . . ~ ~t. I . r--' l~I-. / , Total Water PUmpagol From the above study of population inoroase and per oapita oonsumption it is possible to arrive at a probable total water demand in 1960. Using tho estimated population of 30,000 and the probable per oapita demand of 400 gallons it indioates that the total demand for maximum days in 1960 will be about 12,000,000 gallons. Therefore, a souroe of supply exoeeding that amount should be available by that time, and a softening plant should be able to produoe that amount of softenod water without overlonding it boyond reasonable demands. As a further oheck upon the abovo estimated demnnd, the maximum daily and monthly pumpages during tho past 12 years have boon plotted and a curvo passing through those points has boen drawn and extended for an additional 20 years. It will bo seen from tho ourves on Curve Sheet No.3, that those figures very olosely approximate the results arrived at above. The upper ourve shows that the maximum daily pumpage has in~ oreased from 2.3 million gallons por day in 1927 to a naximum of 7.12 million gallons in July of this yoar. The oontinuation 0 f this curve indioates a maximum daily pump age in 1960 of approximately 13 million gallons per day. The lower ourve, whioh is based on the average of all the days in tho maximum month each year, shows an inorease from 1.3 million gallons in 1927 to 5.2 million gallons in July of this year. This lower ourve produoed shows that the maximum month of 1960 may be expected to have an average daily pumpnge of approximately 10 million gallons. Therefore, again taking an averago between the maximum daily pump ago and the aver~ge daily pumpage for the maximum month, a third curve has beon drawn whioh shows that it is roasonable to oxpect a demand of at loa.st 11.5 million ga.l1ons in 1960 whioh substantiatos tho provious estimato of approxi- mately 12 million gallons, .. I ' -12- , I. , .. ... /3 I I "l '.! "t . I I I() 'I ..:..; "'~(B:Cl' .8,.'+' . . I . , . I '~ . I ' () . I . .... : ~ 1 ~..~._..._'..-.:<U.. I: . Iii I . I i , ' ; ,I I ...~. ~...I, i I ' I : j , I I, I ' ~ 1 1 i , I i i ~ Curv~ Sfrccf No.3 I I ~ '\ ~ I 1 .1 d ~ ~ I I I' . . 1 I \ t , i I I 0. I ,. ~ '0) i:. ~ i i I I r Reoomnended C~pacitiest It is reoommended that the City hav~ wells in 1960 with a oapaoity considerably in exoess of the estimated maxi- mum demand of 12 million gallons per day. Therefore, during the next 20 years the City should plan to construct sufficient wells to re- plaoe such wells as may be abandoned during that time and to increase the total available supply to the potential capaoity as recommended in the water supply section of this report. The amount available in exoess of the m~peoted. demand will permit a rest period for eaoh well each day and will also insure a sufficient factor of safety to care for breakdmvns or for any unusual demand. It is not so neoessary that the design capacity of the water softening plant be in exoess or even quite equal to the probable me.xi- mum daily demand which has boen predicted for 1960. The plant should have sufficiont capacity to operate within tho designod rato during praotically tho ontire year, but a slight overloading is not serious on oocasional days of unusual demand. Therefore, it is recommended that the water softening plant be designed for a normo.l low rata opera.t- ing capa.city of 8 million gallons per do.y. However, 0.11 piping, con.. trollers, and other equipment should be of suffioient oo.pa.city to permit a 50 peroent overload during da.ys of extramely high demand. Tho filtors would be designod to opero.to a.t the ra.te of 2 ga.llons per square foot per minute, but during days of maximum domo.nd tho controllors would be set so that for short poriods of time tho filters oould bo opora.ted a.t 3 gallons per squaro foot per minute. This ro.te is higher than would be rocommondod for continuous opora.tion, although some plants in this country are boing oporated continuously at this rata o.nd oven highor. . ...13- . Thorofore, thoro is nothing unusual about this highor rnto of flltrn... tion, :md it is ostimo.tod thnt tho plnnt will proba.bly not ronoh tho dosigned onpnoity a.t the low ro.to within tho next 10 yoars, and it would nood to bo oporatod C\.t this high rnto for only n fow da.ys during tho summor, 20 yonrs from nmr~ Thoroforo, summarizing tho a.bovo disoussion, it may be conoluded that the filter plant should be designed for a normal low rate operating oapacity of' 8 million gallons per day with provisions made f'or .50 peroent overload during extreme oonditions. Average Annual Water Oonsumption. In determining the oapaoi ty of the plant and f'uture well requirements, it was necessary to study the demand of' the maximum days end of' tho nlttXim\Ull. month of' the year, sinoe the souroe of supply and. rate of' softening must be able to meet the maxim\Ull. daily dema.nd. However, in computing the cost of ohemicals and operation it is neoessary to determine the average daily demand during the next 20 years. I In studying the annual pumpage for the past 12 years during whioh reoords had been kept, it is found that the inorease in water usa.go during tha.t time hus boen quite uniform. The avero.ge o.nnual oonsumption of' the Years 1926 und 1927 wns 38.5 million gnllons or nn o.vero.go of 1.05 million go.llons per da.y. The uveruge annual oonsumption of' the yours 1937 and 1938 wus 902 million gnllons, or an nvero.ge of' 2.48 million go.l- lons per da.y, This shows o.n uveruge incroo.so eOooh yeo.r of' 130,000 gnllons per do.YJ o.nd it is logioo.l to o.ssumo tho.t 0. similo.r inorouse will oontinue during the next 20 yeo.rs, which will make the nnnuo.l oonsumption in 1960 nverago a.bout 5.2 m.g.d,J thoroforo, the a.nnua.l consumption during the next 20 yeo.rs should o.vora.go 4,0 millioh ga.llons per do.y, o.nd tha.t f'igure will bo used in oomputing chomioo.l a.nd oporo.ting oosts during the period f'rom 1940 to 1960, ...14- . August- 1939. SALINA. KANSAS . REPORT . on :Cho J MUNICIPAL WA~~ SUPPLY , una PROPOSED WATER-gm;.TENING PLANT . PART II - ~ 1 L r - SOURCE OF WATER SUPPLY ....... --.....----.... PAULETTE 8= WIlSON .. ENGINEERS - Snl,inn --- Top okn Ko.nsnh SALINA, KANSAS ENGINEERS REPORT on the MUNICIPAL WATER SuPPLY & PROPCSED WATER SOFTENING PLANT PART II ...- SOURCE OF WATER SuPPLY Introduotion. r' There are a number of factors worthy of oonsideration when a study is being made of the water supply of a oity, and foremost among these are the quantity, qua.lity, and cost of production of the water. Salina has been using the same source of water supply for many years, and this seotion of the report is concerned primarily with the question of whether the present source of supply is adequate to meet the needs of the City in the future. Part III of this report will deal with the question of improving the quality of the water. The logical introduction to the problem of water supply is the seouring of oomplete data on existing wells whioh produce water from the looality under oonsideration. These studies give reliable information on the amount of water available and the cost of production of water fram the immediate vioinity of the existing wells; and this information, to- gether with faots concerning the extent of similar water-bearing strata and the rate at which water may enter these strata, makes it possible to , prediot the ultimate yield of the potential souroeof' supply. The data whioh have been seoured end their relation to the future of the City's water supply are disoussed under the following heads. (a) Charaoteristios of Existing WellsJ (b) Extent and Availability of Underground Water SupplYJ (0) Conolusions and Reoommendations, and (d) Estimate of Costs. Data on the existing wells were secured fram six of the seven wells now being used by the City as e. source of supply. Sufficient data were obtained at -15- eaoh well to determine the effioienoy of the pumping equipment and the amount of water which tho well could safely produco. Tests wore not run on Well No.3 because tho method of installntionwould not permit the use of the instruments employed in the test. This well can be tested at some future time by lueasuring its discharge in the reservoir at a poriod when the river is low and the use of water sufficiently light that no other pumping need be done while tho test is in progress. Characteristios of Pump: Overall efficiency of pump and motor is a term used to designate the ratio between tho useful work done by the pump and tho quantity of energy used by the motor which operates tho pump. In order to compute the efficiency of n pump it is nocessary to have tho following information: 1. Rate of Discharge 2. Total head 3. Power input to motor The methods used to obtain the throe types of information are desoribed under the proper heads. Pump Discharg~: Tho disoharge of each pump was computed from data obtained by the use of a Pitot tube. The Pitot tube is a device for measuring the velocity of wator fl~rlng through a pipe. It consists of a small tube whioh oan be inserted directly into a pipe line through a standard , oorporation cock and which is attached to a manometer filled with a liquid suitable for registering small differences in pressure. From the differences in prossures indicated by the manometer, the velocity of water in the pipe can be readily computed. For each rate of discharge, tho point of the Pitot tube was placed successively at 10 different points within the pipe and readings so obtained wero averaged to got the proper value for the average velooity of tho water in the pipo. -16- The velooity of flowing water at any point in a pipe, is proportional to the square root of tho head produoing that velooity. This makos use of tho genoral oquation V .. '''V~gH where "H" is expressed in foet and "V" in feot per seoend. When "h" is expressod in inohes, the equation beoomes 2.316 -vh,i. Introduoing tho Pi tot tube ooeffioient, V "" 2.316 x 0.881 WT. This equation holds good for manometer fluids having a speoifio gravity of one when used with an air seal. When heavier-than- water fluids are used in the manometer ,vith a water seal, the propor equation is V .. 2.316 x 0.88!""Vh,j"(s..i')', where liS" is tho spooifio gravity of the manometor fluid. The velooity at eaoh of the ten points at whioh manomoter readings wern taken was oaloulated from tho above formulae usinga value for lIh" in eaoh oaso equal to the difference between thoavorages of the values as road on tho high and law sides of the manometer fruid. Sinoe the Pi tot tube readings wero taken at the oenters of gravity of rings of equal oross-sectional area, the mean velocity in the pipe was equal to the average of the velocities obtained at all these rings. The disoharge of each pump in gallons per minuto for any sotting of the valv.o was oomputed from the formula G.P.M. .. V x A x 60 x 7.48, whore "V" is the mean voloei ty in feet per seoond and "AU the area of tho disoharge line r in square feet. Total Head: The total delivery head is equal to tho ,sum of the read- , ing of the pressure gauge on the pump discharge line and the vertioal distanoo fram the g~uge to the wator in tho woll. Tho pressure gauge was read in po~ds, whioh were oonverted into feet. The gauge was not sensitivo for pressure of loss thnn fivopounds, therefore law pressuros wero detorminod by attaohing a hose to tho pressuro gauge, raising the -17- froe end of tho hoso into tho air until tho wntor oansed to run from tho tube, thon measuring tho vertioal di stanoe from the oonter of tho pressuro gnuc;e to the free end of the tube. The totnl hoad wns expressod in feot. Water Horso~ower Output~ Tho useful work done by tho pump may be expressed as water horsepower (w.hp.). It is oomputed by means of the formula.. w.hp. .. o..f.s. x. 62.4 x. H 5~0 ' where c.f.s. ~ disoharge in cubio feet per seoond H ~ total delivery head in feet 62.4 ~ weight of one oubio foot of water 550 ~ foot-pounds per seoond in one horsepower Reduoing cubio feet per seoond to gallons per minute, w.hp. ~ ;'tem. e ~x66 x 62.4 x H 550 · g.p.m. x H x 0.0002525 Motor Input: The eleotrioa1 input to the motor in each well was deter- mined by a meter furnished and installed by the Kansas Power and Light Company. The oonstant for the diso as furnished by the power company was 40. All that was neces-sary, therefore, was to determine the revolutions per minuto of the meter diso. This was done by accurately timing the r diso while it made twenty rovolutions.. When the disc was moving very slowly, the time required for only ten revolutions was'determined. At least two such observations were made tor each setting ot the valve in the discharge lina. Where pOSsible, these observations were made simul- taneously with the observations ot the manometer deflections. The horse. power input to tho motor is equal to the r.p.m. of the meter disc tim~8 .18. the motel' constant times 60/746 = 3.217 x r.p.m. Mean values, as detor:nined for the revolutions of the motel' diso, wero usod in these oalculations. Immediately after eaoh power input observation, the dravdm"nn gaugo and tho pressuro gauge wore read as outlined previously. In each caso tho pump was started with the discharge valvo fully oponed. The pump was allowed to run until tho drawdOVnl was more or loss stabilizedj) them observations were begun. These observations oonsisted of manomoter readings with simultanoous observations made to determine motor input, drawdovm and discharge head. After this set of observations had been made, the gate valve in the discharge line was closed sufficiently to diminish tho pump output. Another serios of observations were then made. This procedure was repeated until the valve was fully closed. From four to seven settings of tho valve were made for each pump. Overall Efficiency. By overall efficiency is meant the combined officiency of tho pump and motor and is hereafter referred to as effi- oiency -- wire-to-water. Such effioienoy, therefore, is equal to tho ratio of the wator horsepower output to the motor input oxpressed as a peroent. It shows tho relationship of the power input into the pump and motor, and tho usoful work done by themQ The efficienoy -- \ilre- to-water, was caloulated for the various settings of tho valve for eaoh pump and motor in all wells exoept Well No~ 3. Tho following sheot GkVI0 the tnllula.ted rosul ts of all the pump tests. Immediatoly follovrirq^< t,hn.t ;\' t;he oharaoteristio ourves of the pumps; oa.ch shoot showing ~;rrtphio"i the rolationship of' the rate of' discharge to (1) the tot~l discharge head, (2) powor input to motor, and (3) the overall officioncy of tho installation. -19'" Sm~UffiY OF PUMP TESTS Vie 11 Run 'fotal hp. ~~ficionoy ~oroon~ No. No. Head g.p.m. Input Wiro-to-Water 1 1 54 J.032 27.4 51.4 2 54 1056 27.0 53.3 1 Stage ~ 53 1048 26.3 52.9 30hp. 68 820 23.9 59.0 5 69 572 19.9 50.0 2 1 77 900 26.1 67.0 2 87 788 25.7 67.6 2 Stages 3 102 587 24.0 63.2 20 hp. 4 130 . -._- 13.5 --..... ~ 4 1 66 1066 35.9 49.6 2 69 1121 35.7 54.8 1 Stage 3 71 1084 34.9 55.2 40 hp. 4 77 1034 33.3 60.6 5 89 876 27.2 72.6 6 93 771 20.8 86.. 8 7 93 -.-- 18.9 ..--- 5 1 55 ---- ..--- ---.., 2 63 1047 2l.h3 68.6 2 Stages ~ 76 790 22.3 67.9 25 hp. 80 21+9 15.1 33.4 5 81 ..--.. 13.6 ...-...... 6 1 56 1146 37.4 43.3 2 57 1124 36.8 W+.o 2 stages 3 59 1089 36.8 44.4 40 hp. 4 65 924 36.8 41.1 5 78 711 35.9 39.2 6 102 ..-- 34.8 ..-- 7 1 210 1126 87.7 68.1 2 207 1097 79.6 ' 72.1 5 Stages 3 218 1042 83.9 68.4 75 hp. 4 230 1050 82.1 74.3 5 264 803 7~.8 72.5 ..20- h~;l::;i :::' ;i;: ;::'::jnillW ::1i diq:tUl fGt ,iL::;n::iH:;~l ttl lntlfHi ;' ill; ;1! :![i ;:; ;;;!lin: :.'::.t:::., )ii:..; !,ti .":>L~rt l!t-+ j~t; ttH p.;,; I j trit-n1; ifH. 1_i...H::-Ih1 l,ll..j: ;~~~.. :.".Hl iHi ITi: 'Ii: 1f.n if!. . :.:;. ,", H': <-,'r 'i'" 'ri ,ill d., n ;::.t! j'H-'P +Ht~ t f t~:j .., 'it :t;lt<- Itl "Ii I:;.:: .... tit: "r::: :1" "j ,titt". 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Li~: !r': ;'+:jLh:J;"~"t :q, ,; " l+ .,1 dH j J! i lit: (W~iI,C:t.: -",/I(.l.1-:J1: Ii it: :"1 ,; ii ;Ii ~i;; .:l,! ,1,: :.;: .." . 1- ! il[' rj 'r;lU 111: ji:d!!tl :;:1 ilL ::li l:t T1,1 (ti., ;il+ ::;L ,i~; f.;: _i"" .,,-.. i, ~lrn.P~~ il-1[-P~~-lf1t.t ;n~ .t.j.t~ qp J-;.: ::1 l;.t~ l:.~; '! i! .t.. ;.;i 'r1irlqHj:;j ii;: !il,II:JU: ;itl lit! hi! ;!;I :i:.,:'I: ';!: H1; , -: :., .. .11:H -tit,::'; IIi lilI1,,.1 ',11 ':1' +1. ,H'li:!, ,.,1 '':+J., -. __~~_ I I 1!llll:1 ;;1.1 :11 !.f 1I'I:.!"-; ':!: i~:' :.I';-,1-L1, :::::'. '1' ". ': :._.: "" , n 11-j! 1, I i I n 1 : , I, :; i;'. 1// KIll :. I' ~ A \1 R' '-6. <: :' . . , tnJ iiJl~ if! ill ib ~4~,4 ltti~ilJiit JQ; Hb~v.~:5: bf:1 ~ :.; 1 it I II: I in i -lit; ~-! n ,!: !; 4i~A %'g:~ Hf~3IN~i? &It~:- : !i~: .--- il~l 11/ tiit;l: 111!1.'j'illll' :11, jlllfW" ,.....~;I~i1:N:Cy: ',1: IIi ::1:", ..- It,. ..1:. :.'11 it II.nLIL.LI1 'fl. .f.JI.I :li f.IL.l 'f,1 .1','11 :! J." ..;;: ./,.::11 j, 4...::~i_.',~:"l~__~':':_ Ii 4- : I! i I;i ii ~H1! i;l T! it' ,: I II U '11:' ; I : c'1.'fP , ; ~ iff{ {rOr I''l! j ;' it;: ~i J: 0\"' llr I tilt! titl 1/ l Ji :1:1 'iil Hi! il.ll 'I;! !tl, ::1!~.;J. 3." ::H ![:llil:i i,' ,.". ::.., ,0 +:,". ~.~ 111:~ 'ii: ,.., :;:I:'~ ,:~, ::g~ ,-. '" '." ,..t IL.., '"., H' J -:' .,.; ::: ~;L :' . I, ': " : :-s ' ,., "., ", 1;:1 l' -II ' . , : . .. 'f'\ " , ' " .~ I;:: 4: , :.. .., L R It , j .' I :j II I j' The normal operating oonditions of eaoh pump as shown graphi- oally on the preoeding ourves are summarized as follows: 1 2 3 4 5 6 7 Discharge Total If.p. 6verall g.p.m. Head Input fd nJ, r Effi oi eno-.1 54 :i'1) 1040 'Z7 ~ (\ 53 900 77 26 67 900 (Estimated) 1090 69 35 40 54 1040 63 24 , .j~ 69 1120 57 37 : , !) 44 1090 212 84 .., ,,.< 69 / .> Well No. Total 7180 The total output of the system is 7200 g.p.m. or 10,400,000 gallons per 24 hours. Sinoe the maximum daily oonsumption has reached a point slightly in excess of 7,000,000 gallons, the margin of safety between capacity and demand is not large enough to provide for possible shutdowns for repairs or for proper rest periods for the wells. Discussion of Tests: In making these tests, several sets of readings were taken at di soharge rates near the normal, and the average effi- oiencies under the normal operating oonditions are oompared. Insta1la- tions which have overall effioiencies of 60 percent or over may be olassed as good, from 50 percent to 60 peroent fair, and below 50 percent as poor. It will be noted that the pumps in wells numbered 2,5, and 7 are all operating satisfaotorily, and furthermore, that the conditions of normal operation are near the maximum efficienoy ot the units. The pumps in wells numbered 1 and 4, shaw only fair effioienor and operate under oonditions which rosu1t in effioienoies 5 peroent and 18 poroent. respeotively, below the maximum possible efficienoies. Hmvever, at the low hoads undor whioh these pumps oporate, and at the low prioe of eleotrio current of 1.l5~ per kwh, laok of effioionoy is not very expensive. -21- Assuming the same number of hours of operation as last year, an inorease in effipienoy at Well No.6 fram the existing 44 peroent, to a possible 70 peroent, would result in an annual saving of $289.00 in eleotrioity. Sirnj.1a.r improvements at wells numbered 1 and 4 would result in annual sa.vings of $127.00 and ~168.00 respectively. Therefore, oonditions at Well No.6 probably warrant an overhaul of the equipment, at least it will be advisablo within the next few years, It would be desirable to have both water and eleotrio meters installed at eaoh well, fram whioh reoords of the operating oharacteristios of the equipment might be checked from time to time. otherwise, a systematio oheok of effioienoies should be made at regular intervals. Drawdown: As the pumps were tested for effioiency, a reoord was kept of the drawdawn in each well, The observed drawdowns in feet are listed in the table below, together with the duration of the test, the ratio. of drawdown to the depth of water in the well, the rate o~ pumping and the speoific yield, or gallo;ns per minute produced for eaoh foot of drawdawn. I Statio Depth Rate of : Speoifio . of Water I Pumping : Yield Well c Duration · in Well Porcent g.p.m. :g.p.m. por. .!'t. No. : of Test : Dr awd own Drawdown : of Dni.wdQW11 : I 1 8 MS. I 4S 13.5 29 1040 77 2 7 hrs. 41 l!~. 5 35 900 62 3 9 MS. 36 22 61 900* 41 4 8 hrs. 37 20 54 1090 54 5 8 MS. 39 13.5 35 : 1040 77 6 10 MS. 37 10.0 27 : 1120 112 7 3 hrs. 43 11.0 26 I 1090 99 *Estimated Disoharge. Wells numbered 1, 2, 5, 6 & 7, are evidently being pumped at rates well within the safe oapaoity of the wells and the yield per foot ..22.. of.drawdcrvnt is good in all oases. The large drawdown, the law speoifio yield, and the shape of the drawdown curve of Well No.4, all indicate that it is being pumped at a higher rate than is oampntib1e with long life of the well. Its usefulness may be prolonged by olosing the valve sufficiently to reduce the rate .of flaw. A rate of 900 g.p.m. is reoommended for trial, for at this point the effioienoy of the pump is suffioiently grenter to offset the effect of the higher head. and tho aotual cost per thousand gallons of water pumped will be reduced. Well No. 3 showed a still greater drawdown and lower speoifio yield, whioh is evidenoe of its deterioration from age and long use. Lator in the summer, drawdowns wore cheeked at different times in all the wells. In most cases the statio wnter surfaoe had lowered slightly and the amount of drawdovm was slightly less. This oorresponds to the expocted seasonal variations. ~he drawdown-capaoity curves for six of the seven oity wells are also inoluded. All of the curvos are approximately of the conventional shnpe, with the exoeption of the ourve for Well No.4, which indioates tho effect of overpumping or of possible deterioration of the strainer or of its surrounding gravel wall. Rato of Recovery: A continuous reoord of the drawdown was made for Woll No.1, during the period in whioh the well was pumped oontinuously for 24 hours. Measurements wore taken at intervals suffioient1y olose to- gether to oonstruot aocurate drawdown and reo overy curves for both Old and New Wol1s No.1. These curves aro shawn on the aooompnnying graph. It will be notioed that the drawdown takes p1aoa rapidly and that wi thin thirty minutes after the pump wns sta.rted the drawdown was wi thin throe.. fourths of a foot of tho maximum of tho twenty-four hour poriod.. The -23- reoovery was also rapid, as the water level returned to within tyro ana three-fourths feot of its original level within ten minutes and lackod only three inohes of reaohing its original lovel in six and one-half hours. This rapid return of wator to or near its original level in the wells indicates a relatively high porosity of the wat~r~bearing mnterial. Following the curve for Well No. 1 is shown tho relation of drawdown to time during the thirty-six hour test of Well No.7, mado in February, 1938. "Circle" of Influence: When wo.ter is pumped from 0. Wf'illp the surface of' the ground water is depressed in the area oloso 'co the well while the lowest point on the surface of the water is in tr;i~ well its(Jlr. At some distance from the woll, the effect of pumping is not noticcnble and the normal elevation of tho water surfnce is not affected. The area within which the water surface is depressed is knoWn as the area Qt influenco or the "cirole" of influence, although under no,tunl conditi<ms it is seldom 0. true circle, due to variations in the c~racter of the aqu~fer. It is important that wells bc spaoed at a suffieient distance ~pa~t so tho.t their respeotivo ciroles of influence will not ~erlo.p. Such in~rference roducos both tho capacity and the life of tho wells. At a distance of 250 feet west of "veIl No.1, an abandoned woll (Old vYoll No.1) is still in such condition tho.t the height of the water in it can be measured. In order to determine the extent of' the "cit'ielell of influence !If Woll No. I, a record of the drawdowns in this adjo.ce~t hole was kept ~oughout the testing of Woll No.1. The maximum draw~'own in Well No. 3. was 12.3 teet while the water love! in tho abandoned well was lowered O.~ feet. From theso investigations, the probnble lengtll>>. of the radius of tho "oirolelt of influence has been oomputed as betwoctl), 400 and 450 feet.. Thereforo, tho spa.cing bo"tYrecn wens should be not leJ!8s than 900 feot" and prefax-ably 1000 feet. Presont practice conforms to thi~wule in n ~isfactory mnnner'. -24" . I: . .. I : 'I ' I; : h.' I :!! I , I . ill .' I ::: I ,'; , , " ,I , : I, 't: ,,',' '!':l' .. f.' ,.. I' . . r j ..., . " , . l .. j .. ,. _ L ,~t I ..i.. . j 11'1 ; ~ T .. I t j , .. j ~, j . I . ;.J .:..:..:J. ~~ '~i'1" ," :'.1 "I,., 1 .. .:.ri.' ,. i. "';'1- I ..:.:.;..;. ::;-W-~ .. "i 'I: ".. '-'it ~H-"" . ., ..., '...,'!-'" A: ;r III Ifllli I,!l ,Llil! i' ill! fii- Ii! :1: :: 1.lii ,:1. ::l~ilrli;.: :11. TG . 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'I ~I '1:~I::~ ' I\I I:!'~,; I',' ::; 1'1'1 ,~ i:' ~". ;1[; I. ; "I" : ,'I ])"':: I rl'Ci!la, ,I ".:,' I 'I')' ,j i I rllli1 ,": ; :' 'I I I" 1 I I,! I! I ... I :. I : "I' .' :~I)~ -'?:,1!~ :inJ ii';:r:~ ,T:::" 'il:ir~];;::,'~ '!:~'i:l1i~ .. v' , ".' S I; ..", '''- " , " 't I :: l ;'Ji :1\1';'v.::: 11m'! ,,', :1 ,,]I! 'I ;:'1;:1: ;1:1\:':1 :i'! :'J ,I' I' , '1 'I " ,1,11,111,,11. I;j, I" 1'1 "11:1'1, 1',1 ,rl.F::a.dl}ei,d.,J r;rlJ:{LJ.u...~l:_I_LJ.w,..l~.r '.l...!":' '. '-'f"'']: I , .Jun" I Jljl'} 1/).3,'1 , i 1-... I 'I ,,' ADEQUACY OF THE WATER SUPPLY ____ l' In predioting the ultimate capacity of an aquifer it is neces- sary to oolleot a large mnount of infor.mation and parts of it should be oheoked repeatedly over a number of years to insure accuracy. The es- sentia1 data to ascertain the yield of an aquifer may be described briefly as (1) the extent and depth of the aquifer. (2) the charaoter and porosity, (3) the rate of inflow. (4) the rate of outflow or losses. Extent of Water-Bearing strata. The determination of the extent and depth of the aquifer requires a study of the size and boundaries of the area. the looation of the surface of the water table, and the location and oharaoter of the underlying stratum. The souroe of the present supply is the valley of the Smoky Hill River, which avel"ages about two miles in width in the vioinity of Salina. The soil is alluvial, deposited by wind and water. A list was made of all available wells and test holes from a point a mile north of the north city limits of Salina to the town of Mentor, a distanoe of approximately nine miles. Elevations were estab- lis~ed on the ground or on the platform at each well or test hole loca- tion. The depth to water and to shale of the oity's wells and. of test holes vmich had been drilled by the oity were obtain~d from the reoords in the office of' the Oity Engineer. The vrells in the oountry were measured to obtain the elevntion of the ",-tel" surfaoe and, where pOS3ible, the dopth to shale. Tho logs of the driller of these wells were re- ferred to for the depth to shale in most easeS.. the list of the wells used is inoluded herewith. showing all elevations. The elevations are reforred to City of' Salina I8tum. The looation of tho wells is shovm on Sheet NOli 1 of the acoompanying set of plans. -2.5- TABULATION OF WELLS .AND TEST HOLES (CONT ID) Survey Elev. Elev. Elev. l{o. Location No. Water Date Shale B.M. Location of B.M. 23 Drouth Relief Well 1':'30-14-2 1217.7 6-8-39 1238.19 Casing 24 'Wallaoe Berg 1-1-15-3 1225.6 6-8-39 1256.6 Platform 24a Laubengayer 1-7-15':'2 1225.3 6-8-39 25 Ashton Elevator Mentor-l 1238.4 6-9-39 1267.92 Top casing 26 School House Mentor':'2 1235.8 6':'<r39' 1266.83 Top cone. platform 27 House S of Church Mento 1'-3 1238.1 6-9-39 1269.6 Top of platform Ci ty Well No. 1 1191 6-39 (Less than 1145)1230.67 E1. Drawdawn Hole City Well No.2 1194 6-39 1153 1228.60 It II A City Well No. 3 1189 7-19-39 1153 1230.86 II " II Ci ty Well No. 4 1192.5 6-39 1230.12 II \I 11 Ci ty Vtel1 No.5 1195 6-39 1156 1230.58 It n " City Well No. 6 1192 6-39 1145 1229.15 II II It City Well No.7 T.H. 20-32 1195 6-39 1152 1228.49 II II It 13 28 S\V Cor. 2-lL.-3 T .H. A 1148 29 SE Cor. SN ~ 2-14-3 T.H. B 1148 I 30 In NE 1/4 1 -14-3 . T.H. C 1164 31 NE of SE of SW 1-14-3 T.H. D 1143 32 swof6-14-2 T.H. E 1129 33 SIT of 6-14-2 T.H. F 1150 34 NE Cor. of 7':'14':'2 T.H. G 111..:2 35 NW 1/4 of 14-14-3 T.H. H 1126 36 NW i/4 of 14-~3 T .H. ,1 1134 37 Belle Springs Creamery 1154 38 SE 1/4 of 12-14-3 T .H. J 1142 39 SE iJ4 12':'14-3 T.H. 18-37 1148 40 BE i/4 13-14-3 T.H. 15-38 1156 41 1m 1/4 13-14-3 T.H. 7-37 1160 42 SW i/4 7-14-2 T .H. M 1164 43 Watson Theater 1148 44 Pumping Sta. City Water T.H. 8-37 1142 45 13-14-3 T.H. 2-31 1163 TABULATION OF WELLS AND TEST HOLES (CONT 'D) Survey .h:lcv. .h:lcv. .h:lev. No. Locution No. Water Date Shale B.M.. Location of B.M.. 46 T.H. 3-35 1161 41 . HE 1/4 13-14-3 T.H. 17-37 1153 4B Lot 4, Blk. 14. Oakdalc Add. T.H. 19-37 1154 49 N of Oakdale Park T.H. 16-37 1149 52 NW Fair Bldg. Kenwood T.H. 6-37 1153 53 HE 1/4 13-14-3 T.lL. 5-37 1158 54 NE i/4 13-14-3 T.H. 10-37 1168 55 E Line Lot 4. Garden Home T.H. 3-31 1161 56 NE 1/4 24-14-3 T~H. Q 1154 57 SE 1/4 18-14-2 T.H~ S 1173 58 NE 1/4 19-14-2 T.H. T 1218 ~ 59 NE Cor. 24-14-3 T.B. R 1176 '" ~ 60 NE 1/4 24-14-3 T.B. 9-31 1168 61 NE i/4 24-14-3 T.B. 11-37 1178 62 NW 1/4 30-14-2 T.B. Y 1162 63 SE 1/4 24-14-3 T.R. 12-37 1179 64 NW 1/4 30-14-2 T.B. Z 1170 65 SW Cor. 14-14-3 T.B. 0 1156 66 NW 1/4 23-14-3 T.B~ P 1135 67 SW' Cor. 23-14-3 T.B. U 1186 68 SW 1/4 23-14-3 ' T .H. V 1190 69 HE 1/4 26-14-3 T ~H. W 1172 70 NE 1/4 25-14-3 T .H. X 1160 71 SW 1/4 24-14-3 T.H. 13':'37 1171 72 nw i/4 23-14':'3 T .H. 14-37 1154 NE 1/4 13-14-3 T~H. 4':'37 1156 SE 1/4 Sec. 13 T.B. 9-37 1154 Old Well No. 1 1149 T.B. 20 Viell 7 1160 From tho elevntiona of the statio wntor lovel ns determinod, a oontour mnp WOos drawn, (Soo Dra.wing No.2), which givos a pioture of tho uppor surfo.oo of tho snturc.tod zone. This surfnee is subjeot to slight ehangos from o.o.y to dny o.nd from yonr to year. Thereforo, the mnp. as atto.ehod is a reproscntntion of tho wo.tor surfo.oe o.s it WllS found to exist in late June and early July, 1939. The map indioates that most of the water supplying the city wells moves down the vall ey from the south and southwest. It is interesting to note that all of the city wells are south of' the area where the underground flow appears to be from the west towards the east, indicating that at present, little if' any ,vater is being secured from the Mulberry or Saline valleys. Profiles of the statio water level are shown on Drawings 3, 4, and .5, of the maps aocompanying this report. They show the general slope of the water and its relationship to the underlying shale f'ormation. From the two profiles passing through Mentor, the mean slope of the water surfaoe from Mentor to Salina. was determined to be 0.11.5 percent, or about 6 feet to the mile. There were not suffioient wells available to show all the minor irregularities in the surfaoe of the water, oaused by the presenoe of clay lenses and other variations in the oharacter of' the wnter-bearing material) but a sufficient number of elevations were obtained to con- struot the oontour lines showing the average slope and nature of the water surfaoe and to meet the needs of the present stu~. Except as it is defleoted by 1000.1 obstructions and by the p'lUl1ping of wells in ~he CU"OA, the flow of the water through the aquifer is at right angles to the oontour lines at all points on the map. -29" Depth of Wator-Bearing Matorialt In order to obtain an estimate of the thickness of water-bearing m€lterial in the Salina area, the logs of various teet halos und wells were plotted on profile sheets. (See Dra-uing No. 3~ 4.. anc S, of the t'.ccompa.nying maps). Profile lines show- ing the water lovel and shale elevntions were then dravr.n on these pro- file shoets. Drnvnng No. 1 sh~{s tho looation of these cross-scotian lines. From these profilos, tho total depth from tho wnter line to tho shnlo vrns dotorminod. Next, the dopth, or total thiokness of the im- porvious muterinl lying bot\"/Oon the wator line und tho sho.lo lino wero takon from tho logs of tho individunl tost holes und vrolls. In this con- neotion, fino s&1d wns considored to bo impervious; for even though its porosity is high, its yield is relatively low. Subtracting the thickness of impervious material from the total depth from water line to shale gave the net depth of porous material at eaoh hole. The average depth for any one profile line was determined by oalculating the cross-seotional area of the porous material, then dividing this area by the entire length of the profile line. After assigning weights to the various average depths, a weighted mean val-ue of 32 feet for the thickness of the pervious ma- terial was obtained. Drawing No. 6 is a contour map showing the thick- ness of watOl'-boo.z'~l1g!Mterial. Study of Shale Elevationst The floor of the aquifer consists of Permian shale, whioh is impervious and permits little or no loss of water through it. The anoient valley wa.s eroded into the shale refilled with alluvial materia.l of the Tertiary and Quaternary periods and tho present bed of the river lies from .50 to 60 foet above the shale floor. The information relative to the elevations of this shale is not as extansive as is desir- ableJ sinoe, for a. largo number of wells, no reoord was kept, or thoy merely penetrated tho wo.ter-bearing stratum and ell d not extend to the -30- (:i,'," i shale rloor below. The test holes and wells used in the study or the shale surraoe nre tabulatod in the preoeding table entitled "Tabulation or Wells and Test Holes used in Investigating the Underground Water SUpply or Salina and Vioinity". A contour mo.p was drawn showing the average surrace or the shale lying beneath the vrntor-bearing mo.terial. (Seo Drawing No.6). The oonolusions which oan be dro.wn rrom a study or this map o.re as rollavtsl (0.) All city wells are looated in the deop shale aren. (b) There is a similarity betvofeen the surro.oo or tho ground wator o.nd the surface or tho shale lying beneo.th it. (0) There is a high shale ridge west or Salina and just east or Dry Creek. (d) The shale south or town is higher than immediately below Salina. It is probable that there is a trough-like depression ax:tending on south through this shale ridge. (e) Being above the surface or the water table, the river oontributes to the aquirer instead of itselr being red by ground water. -31- Charaoter of Water Bearing strata: The oharaoteristios of the aquifer determine its ability to aoquire, store and tranamit water. There are many theoretioal means of olassifying the material, but in this case, the data obtained from existing wells have been analyzed for this purpose, since they are more logioal and dependable than laboratory analyses would be. Logs of Well No. 1 and of the nearby abandoned well are typioal of the area now tapped by the City's wells. They are as follows: New Well No. 1 Old Well No. 1 o - 3 Soil 0 - 3 Soil 3 - 23 Yellow Clay 3 - 27 Clay 23 - 33 Coarse Sand 27 - 30 Coarse Sand 33 - 44 Sand &: Gravel 30 - 53 Sand &: Gravel 44 - 45 Clay 53 - 55 Clay 45 - 50 Coarse Sand 55 - 63 Sand &: Gravel 50 - 62 Sand &: Gravel 63 .. 65 Coarse Sand 62 _ 63 Clay 65 .. 78 Sand, Gravel &: Clay 63 - 70 Coarse Sand 78 - 85 Clay 70 - 73 Sand &: Gravel 73 - 75 Coarse Sand 75 - 82 Sand, Gravel &: Clay The above logs and similar logs of the other oity wells, together with an examination of samples of the water-bearing material, justified the olassi- fioation of the aquifer as a mixture of ooarse sand and gravel. The effeotive porosity is the peroentage of the total volume of the aquifer that oontains available water; which will amount to about 25 peroent in this .case. Bearing in mind the type of material of' whioh the aquifer is oomposed, its oapaoity, yield, and rate of' replenishment will be disoussed. -32- Storage Capacity: As was noted above, the average depth of the water- bearing stratum in the valley is 32 feet. The area fram which the prese~t wells draw water is approximately a rectangle, one mile wide by 2-1/2 miles long, with an average depth of water of 40 feet, sinoe this area has a muoh deeper water body than the average of the valley between Salina and Mentor a.s computed above. This basin oontains, in rowd figures, 5300 million gallons of water. At the present rato of use, this is suffi- cient to last six years; at the 1960 rate of use it would last three years; while for the average rate of 4 million gallons per day the supply would last four years, considering the basin as a reservoir with no water being added to it. Since the reservoir has not been depleted, it is evi- dent that tho ra.te of inflow has been equal to or greate!" than the pumpage, and the variations in the water table a.re next examined to asoertain the relationship. Seasonal Change in Viater Level: The effect of pumping on the underground storage was noted by observing the change in static water levels during a peri od of heavy pumping and of 11 ttle or no rainfall. Da1 ly measurements were taken to determine the change in the static water level in Old and New Wells No. 1 from June 20 to July 18. These measurements were taken each morning about 8:00 a.m. New \1ell No. 1 was pumped oontinuously from 8:30 in the morning for twelve to fourteen hours -daily, allowing tho well to rest between ten and twelve hours before the measurements wore taken to establish the level of the wator surfaoe oach day. -33- Tabula.tod below is the observed drop in the water level in the two wells. The table gi vas the accumulated drop in inches from June 20: Da.te Old Well No. 1 New Well No. 1 June 20 0 0 June 21 '2 2 June 22 3 3 June 23 1 8 June 24- 10 13 June 25 14 12 June 26 14 18 June 21 15 18 June 28 15 15 June 29 15 12 June 30 15 8 July 1 11 9 July 2 15 11 July 3 15 11 July 4 15 11 July 5 22 11 July 6 23 12 July 1 25 15 July 8 26 15 July 9 25 15 July 10 26 16 July 11 26 19 July 12 30 19 July 13 31 22 July 14 33 23 July 15 35 25 July 16 ..- July 11 38 26 July 18 38 21 These data are oompared graphically on Curve Sheet No.1;. They are plotted so that the true difference in the eleva.tion of the water surface of the two wells is represented. It will be notioed that at tho beginning of the period of observation, the differenoe in the water levels was 11;" while on July 18, it was only 4 inches. The explanation seoms to be that, as the rate of pump age was increased, the area influenoed by that pumpage was also increased, thus extending the area of deeper drawdown \mtil its effect was felt in Old Well No.1. -34- \ U :' ,J ljl ! ' n\J I : I ! : :: : j : ..; I ,." , ,..,., 1'& 1.1-. ,.+ .l :::;~.;-~: ;14 : i.;.: ,~..:L:i ..~ . I . j . . I. ", .:: ;::;' 1 ;-j: 1" " . ,l . j 11ttG'1 ,;': ,: i !i:: '~:! "::::,':! i::, .: : if! i : Ii . ! :~;'I' ; : 1 rl'-~TJr: i:~~ ~:T' r~ ~7~-: "; ,'L i I ~; i~l. "It! )j~t Ill: l:i:.' : t t:. ~- ~ L. ' . .-, H iH+ iFi ~~:~+l~ ;~ i : ::: i 1 Lh I d 1'-11, i ~ :-~~ ._. : ~ I . ;lii ;'ii "IX lfi: 1 ii .iili. .tiLL --t-';'~- 'i-LW- J-j.~:'- 't" I. 1.1. 'I 'I' 'i, I' ", 1 : d ~ 1.1 I, ~ i 1., t 1 r! rHllW.~j .11.;.;: , . , I I If. ,l .: : Ii' "I' 'i I' j I ,! i 1111 i, I I if I 1 : '.,'.hl ;1...,. ':1,' , I ".1 I. ,! 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':'1J..:. ~~ ~~_ ...:..:..... .. . ; : ~ .,.. :lL: , I i .---.' .._..~. +.- d~I~_ ~f ~- -~ ~+- ~ :; , ! ; :.: ,: II; It'l I...;, ~+ .-. _.._.___+_ .~....,._. .~~~ ~t · _..~t -- -.'t~-. .: : -_....;..:~ (" ....-f--- . .. -. .. . ::t: . ::I; , ~~~.~. ~: I ~:-: -E .: . : ;-:1 _ ~~- ---. "--:_1_:-;+ ,u..' ,~ i I ' I -. ~ -~..t~:-. --:'.1" HI....... -~.~'- .. I ::,': :1 i:.. -~. f- :-.t'.. --- ,-- 1 -1~ -+-~h'- dUt ~~-~+ ~~ ~- .',: j:~ ,I' .' 'J. ,; I ~ ~ :=':'~~': ..::.;.. ~~.L.:. :-:+1'-:-- r'" ....-. ....:.,. . 'i. ::1' .':: :. ., . h~.;:" --h ----... ;j . t' . ., ." " , ; ; ~ ; t-';~'; - 't" I ; .1' _ c':"'" _' ':'+~_::..i. ~.~ _........[:..:- ,I; t:... , : :. !;!I 1U\ : ... , "' ,1 :: '.. '" : : ......... ! I ,',.r -<, I :.;;': ". Ii: . . i ~ !--... t--~_. . t' .. .-, J. _111 I :, ~:.._~~~~:J t: ~'+. .~ , : ~;;~. ;'1.: '.~'H'" ! ~ ; I : j I t i" T __, ~ : :;.. I I.. ! t ~ ; ; 1 : .. . .. . I _.;...t.~...:..~..:..~~ " . , ...~ ~ J.r_~ _ _~ ____ i .:, :t' I;:: :! .11[ ;~;I,I" :; :,::0., 'V ,i:r' \ ,. . . I · :.-:-...t:-:- i ~ ; ; j .- . t-, , J; lit_ q:' I , j..I-I '~;i ; U I.., , ;{::I:\. ~~.; - , r .~\: ~. i " , I! ::;; I:;:':;:: IV . . ': J .~ :.~. . i i.~ .: t ' . , 7:;l :! + j:, :! T I . : . . i ." .. ..1 . ~1.11J:: :~i:.. ,.',: !: :.~7:;', ~'7i ; I '. ~ , t ~, : I: ; " ,: ., I: : '~ \--~: " ;;: i ; i ' , ~-t I ; 1 ,~-I-: ' , '.,.~; ; :i ;: ,: ,. , . t ' . : " 'j .- .,,- .,. . !-':.. ----- , , i , ; :1 !.1~ 0- ::1 !: J.. .,-"- ; ~ . I 1,1 ; , I, It j : . : ~JeY,/ -+-.,.-; .. ,..- ~7TT -- -~. ....:~~~:.:. ~ : \' I :t1 1 " ~L1-~ :_~:-.- - I, ~.. '::" ;,.... , -- 1 +~ :7-. , cO Jilne Z4 ! 11 (:8 /8 JLdy i' The total observed l~tering of the water level in these ~tO wells for this period of 28 days was 27 inches in the new well and 38 inches i.n the old well. The successive lowering of the static water lovel of these two wells sUGgested that it would be instructive to observe the total lowering of the water level in the other city wells. Observations were not made daily but over a period of from 2h to 28 days. The results of these observed changes are listed below: Well No. Days Elapsed Drop. in Water Level 1 28 2'311 2 27 2'0" 4 24 0'6" 5 27 3'7" 6 26 2'11" 7 28 1'5" Average 27 1'9" During this period, averaging 27 days in length, an average of 5 million gallons per day was removed by pumping or a 'total of 135 mdllion gallons. The average Imqering of the water level at the wells was 1 foot 9 inches. Permanent Changes~n Water Level: A comparison of the static water level as observed durihg past years with the statio water level at the same locations taken from the water surface oontour map, shows no definite change. From the e~aluation report of the municipal water plant, made in 1925, the distance from the pump bases to the water level in Wells 1 (old), 3 and 4, was 38.2 feet, 38.3 foet, and 36.9 f~et, respeotively. The corresponding distance as observed in June and July, 1939, are 38.8 feet, 42.2 feet; and 37.6 feet. This gives a drop in the respeotive wells of 0.6 feet, 3.9 feet, and 0.7 feet. So far as known, these are the only recorded measurements of the wator level in oity wells made prior to this study. -35- valley floor. As mentioned before, the mean slope of the surfaoe of the ground water from south to north is 0.115 percent, or approximately six feet to the mile. Test holes prove that a large part of the watex- bearing material consists of ooarse sand and fine gravel. In a .bulletin on "Hydrology of Kansas" by Professor J. O. .Jones of the University of Kansas, Ogden S. Jones, GeoloGist of the Division of Sanitation, State Board of Health, states in his chapter on ground water, that tbe velocity of ground wa.ter in Kansas, under a hydraulio gradient of 10 feet per mile, varies i'rom 1.4 feet per day in sand to 8.8 feet per day in ooarse gravel. Dr. Slichter found that the under- flow of the Arkansas River near Garden City with a slope of 7.5 feet per mile had an average rate of flow of 8 feet per day. Dr; Wolff found that the under~low of the Republican River near St. Franois with 0. slope of 10.7 feet per mile had an average velocity of 17 feet per da.y, varying from 4 feet per day in the fine sand along the edges to a maximum of 56 feet per day for the ooarsest material. By 0. eompa~ison of the material in the Smoley Hill River valley and adjusting for a slope of six feet per mile, a conservative estimate of the average rate of flow in this valley is five feet per day. The effective width of the valley south of Salina is two miles, the average depth of the coarser portions of the aquifer is 32 feet and the effective porosity may safely be estimated at 25 percent. Comblning these figures gives the probable rate at which water is moving from the valley into the area around the wells: 2 x 5280 x 32 x 0.25 x 5 x 7-1/2 a 3.17 million gallons per day or a total of 1160 million gallons per year. -'37- Rainfall: The mean annual rainfall for Salina is, in round figures, 27 inches. Only a small portion of this is available for infiltration into the ground. Students of ground water supplies have found that the amount of infiltration into the ground water as compared to the annual rainfall ranges from 20 to 60 percent, depending on the prevailing type of storm, character of soil, and various clilnatic conditions. Using the lowest of these figures, twenty peroent will enter the ground and add to the availa.ble supply under conditions of soil and surface slopes, such as exist here. Using this value for infiltration, tho depth of water added to tho ground water supply is equal to 0.45 feet per year ovor the entire area contributing. The area. to which rainfall is contributed directly is the area assumed to constitute the basin surrounding the wells, a rectangle one r~le wide by 2-1/2 miles long, or a total of 1600 acres. The water added to this basin each year is therefore equal to: l600> x 43,560 x 0.45 x 7-1/2 = 240 nullion gallons. Infiltration from Smo~J Hill River: The length of the river used in these calculations was only that portion considered to be within the principal drawdown area, amounting to approximately 20,000 linear feot. SmuG local opinions have been expressed to the effect that the river water is effectively scaled off tram the underground supply duo to an impervious separating layer of clay. A study of the logs of test holes and wells docs not sub- stantiate this belief. However, infiltration has bcen,assumod as taking place only through the sides of the stream and none through the floor due to silt oold chemical deposition on the stream bod. The effective porosity was assumed to be 10 percent, due to the presence of tho finer material along tho bmlks of tho stream, and tho 11ydraulic gradient as 30 porcent. The depth of porous material bolow the l~l water stage of tilO river, as detorlnined from a study of the test holos -38- nearest the river, is 15 feet. Authorities have recommended a velocity of flow from a river of 0.065 feet per day at a hydraulic gradient of one percent, whioh equals two feet per day at the slope of 30 percent. The estimated infiltration from the Smoky Hill River is therefore equal to: 22,000 x2 x 15 x 2 x 0.10 x 7.5 = 0.9 million gallons per day. This quantity is equal to 330 million gallons per year. other Sources of Ground Water: If the additions to the ground \vater from the present sources prove adequate for the demand, no change in eri sting conditions lnt'.y be expected. 'Whenever the demand exceeds the inflow, a permanent lowering of the ground water will begin, first in the immediate vicinity of the wells and then spreading slowly in all directions. The increase in slope resulting from the local change in level ~~11 induce higher velocities which will in turn compensate for the decrease in depth of the flowing wa.ter~ Also, water which now flows eastward from the valley of Mulberry Creek will be induced to flow toward the pumped area_ when the water level therein is lmvered. By the time the water level has been lowered five to six feet, the inflow from this region will be pro- portionately equal to that of the Smoky Hill valley. Undor such conditions, the movement of water from this source into the mile wide rectangle, con- sidered as the pumping reservoir, will be equal to 3280 x 32 x 0.25 x 5 x 7-1/2 = 1.58 million gallons per day, which is equal to 580 million gallons per year. Summary of Rate of Replenishment: Below is a. summary of the estimates as made above, in million gallons per year: Underground ~low in the Smoky Hill Valloy - - 1,160 Rainfall infiltration - - .. .. - .. .. .. - .. -.. 240 Porcolation !'rom Smoky Hill River - .. .. - - - 330 Total annual increment (existing conditions) 1,730 Addi ti onal Flow from the north- 580 Ultimato Tota.l- - .. - .. ....- .. .. 2,310 -39" I - ~~e Requiremen~of City and Adequacy of Suppl~: The average annual oonsumption during the 20 years from 1940 to 1960 has been estimated at )..\..0 million gallons per day, whioh is equivalent to a yearly oonsumption of 1,460 million gallons. The maximum is expected to reach 5.2 million gallons per day or a total of 1900 million gallons per year in 1960. It will be noted that the supply of the Smoky Hill Valley appears to be adequato until after the oonsumption has passed the average of 1460 million gallons per year or until approximately 1955. If the rate of oonsumption follows the prediotions, it will exceed the annual inflow from the Smoky Hill Valley, from rainfall on the area immediately surrounding the wells, and from the river itself. After this time, the water table will be lowered sufficiently to induce water to enter from the north, that is, from the valley of Hulberry Creek, and to a slight extent from the Saline River, while the steeper surface gradient will maintain the former flow of water from the south. The amount diverted from the north will vary with rainfall and other factors affecting the annual flow from the south, and will need to be only 1 percent of the total requirements in 1960. With this additional supply available to supplement the existing supply, it seems certain that the potential water supply in the vicinity of Salina will be ample until long after 1960. -40- RECOlfi-KENDAT IONS Water Level: A permanent and systematio reoord of the elevations of the surfaoe of the water should be inaugura.ted at onoe and maintained regularly. The water level in each of the City's wells should be de- termined onoe eaoh month, taken after the well has been allowed to rest for at least 12 hours. In addition, oertain wells in the valley, seleoted for their aooessibility and strategio positions from among those used in this study and at whioh benoh marks have been established, should be measured regularly twioe eaoh year, preferably in May and November. After a few years, these data will provide an invaluable reoord from which the oondition of the underground storage can be determined and fr~n which a muoh more aoourate prediotion of the ultimate yield of the valley can be made. Looation of Additional Test Holes: Information as to the width of the water-bearing material to the south of Salina is inadequa.te. It is therefore reoommended that a series of test holes be drilled on the township line about three miles south of Salina and that another series be drilled in an east and west direotion th~ough Mentor. The length of these two test seotions should be from. three to four miles. The test holes shQuld be drilled at regular intervals of approximately one-half mile, but varied to suit 100a1 oonditions as they are enoountored. Same of the additional infor.mation whioh would be furnished by these series of test holes are as follows: (a) They would furnish a oheck on the surface of the statio water leveJ between Salina and Mentor; (b) ,They should prove or disprove the existence of an eroded channel extending south from Salina through the shale, and (0) They would fix more definitely the effeotive width of the underground water. ...l~l... It also seems advisable to prove or disprove the continuity of the apparently high ridge of shale lying to the west of Salina and east of Dry Creek. Looal drillers seem to believe that water found along Mulberry Creek has more iron in it than that generally found east of Dry Creek, unless it is near its junotion with Mulberry Creek. Therefore, it is reoommended that a series of test holes be drilled in tllis locality, probably extending south from the oentor of Section 10, Tovmship l~. South, Range 3 West, at approximately one-half mile intervals for two or more miles. Here again, the exact location of the test holes vdll have to be ohosen as the drilling progresses. It is further recammended that oocasional water samples be taken from these test holes and tested for iron and total hardness. Should this test work prove that a high shale ledge does exist to the west of Salina, or should the analysis of water from the test holes show an iron content and total hardness approximately equal to that of the present oity supply, then it would seem that the city Gould safely seek new well sites as far north or farther north than present Well No.7. It is strongly reoommendod that at least two test holes be put down at intervals of about one hundred feet at each of the recommended locations for new wells. It is further recommended that a test well be drilled at the exact site of the proposed new well and ,that a complete ohemical analysis be made of the water taken from the test well after having first pumped the well for at least three hours. -42- Future Wells: The twenty-four hour capacity of the present seven wells is lo,L~o,ooo gallons. The maximum daily consumption to dnte is approxi- mately 7,100,000 gallons, which, as stated before, does not provide a com- fortable margin of safety. On the days of maximum use this summer the wells were operating 68 percent of the tnne. Thus nll seven wells wore operated more than t-wo-thirds of the entire time to produce the maximum consumption for the present population. It is recommended that two additional wells be added to allow for tho shutdowns which might bo necessary for maintenance and repair. This will bring the total to nine wells, or 011e woH for each two thousand inhabitants. In addition to the bvo additional wells for the purpose of inoreasing oapacity, another well should be oonstructed to replaoe the present Well No.3, whioh has been in service for 20 yoars. That it is reaching the end of its useful service is evidenced by the un- usually large drawdown and its low specific yield. At the same ratio in 1960, tho dato of tho estimated 30,000 population, fourteen wolls should be in operation. The average daily consumption for last year was 2,760,000 gallons per day. This would require that the recommended nine wells be operated an averago of five hours daily. The estimated average daily consumption at the design population is 5,200,000 gallons per day. The recommended fourteen wells would then be operating an average of six hours daily. If two nG~' wells are constructed now, and the number is increased to fourteen by 1960, it will probably be necessary to construot two new wells each four years, one as a replacement and one to care for the inc rease in population.( "43~ Location of Wells: In rocommending locations for future wells, it is diffi cuI t to satisfy all theoretical and practical requirements due to the shape of the valley floor, the location of the present wells and the number of wells required. In general, wells should be located as follows: (a) Perpendicular to the direction of the valley flow. This places the wells in a position to intercept the maximum runount of water. (b) In regions where shale elevations are low, in order to got a well with the greatest possible depth below the static water level. This would allow for an increase in drawdawn of the wells, thus increasing the hydraulio gradient of the wator surface about the wells with a corresponding increase in the amount of water available. The storage capacity will also be increased if the wells are located where the shale is lowest. (c) At points where the logs of test holes shaw an absence or a minimum of fine sand and a maximum of coarse sand and gravel. A well located at such a point will have a high capacity, rapid rocovery, and less danger from overpumping. (d) At points whore the analysis of the ,vuter taken from the test holes shows a total hardness or iron content little if any in excess of that now found in the present oity wells. This is essential to maintain the cost of operation of the softening plant within the estimated costs. (e) At points so that the distance bobveen wells is oqual to or greater than that determined by theoretical calculations. The calculated radius of the area of influence is about 450 foet, or a diameter of the area of 900 feet. Allowing a margin of 100 feet outside of this area, the minimum distance between wells is recommended to be not loss than 1000 feet. All prosent wells fall within this rccownendation. -l~l~.. Following the recomme~dations of Flinn, Weston and Bogert, the spacing between wells placed in a single row should be 1000 feet; for wells placed in a double row, the longitudinal spacing should be 1500 feet and the transverse spacing should be 1250 feet, with the locations staggered~ if wells are to be plaoed in three rows, the longitudinal spacing should be 2250 feet and the transverse spacing 1250 feet. After weighing all the above requirements, it is recommended that the future wells be located at approximately the locations shown on the aocompanying map, (See Drawing No.6), unless detailed investigations at the locations as recommended prove any of the sites to be undesirable Should any of the wells now in operation or to be placed in operation, fail, it is recommended that a new well be located at approxi- mately the same location, maintaining the policy as was followed in the location of new 'Well No.1. The failure of most wells is due to clogging or deterioration of the screen rather than the e~1austion of the site. The above policy should be adhered to unless a study of the behavior of the well throughout its life definitely proves its capacity to be low due to the local geological formation. The location of a new well near the concession stand has been considered. However, it is felt that in order to secure the proper spac- ing of wells that this well should be placed from 150 to 200 feet north of the stand. The chief advantages of this location are: It will allow the well to be discharged into the line to be laid from Well No.7 to the proposed softening plagt; it is on city owned property and it is in a region of good depth of wate~bearing material. ., l~ 50- Table showing the total cmnu1ative hours of pump op eration and the percentage of the total contributed by each pmnpl 1'l'OTAL HOlJ'ltS: PERCENTAGE OF DATE- :OF PID:iPING-1 TOTAL pm~w HOURS CONTRIBUTED BY EACH PillAP- ICmnulative t 1 I 2 } I 4 I 5 I b I 7 I I I I I I I Aug. 1-10 I 963 t 14.8 I 16.5 I 19.6 t 15.2 I 17.6 I 11.4 I 5.1 " 20 I 1,566 I 13.7 I 15.6 I 17.4 : 16.0 I 17.0 I 12.7 I 7.6 " 31 I 2,281 I 13.5 I 14.9 I 16.4 I 16.1 : 16.4 13.0 I 9.7 . I I I I I I I S opt. 10 I 2,710 I 13.4 I 13.8 I 15.7 17.1 I 16.8 I 13.7 I 9.6 It 20 I 3~ 1.54 I 13.0 I 13.3 I 14.9 : 17.4 I 16.8 I 13.9 : 10.7 n 30 I 3 , 61~1 . 13.2 I 13.3 I 14.7 17.2 16.6 I 14.0 I 11.1 I I I t I I I Oct. 10 : 4,140 I 13.3 I 13~3 I 14.5 17.2 I 16.6 I 14.0 I 11.0 II 20 I 4,548 I 13.6 I 13.3 I 14.4 : 17.2 I 16.l~ I 14.2 I 10.9 " 31 I 4,917 I 14.1 I 12.8 I 1/+.1 : 17.4 I 16.1 I lL~.9 I 10.6 I I I t I I I Nov. 10 I 5,175 I 14.2 I 12.6 13.9 I 17.2 I 1.5.8 1.5.6 I 10.6 " 20 I 5,414 I 14.1~ I 12..5 I 13.9 I 17.0 15..5 I 15.8 I 10.7 II 30 t .5,648 I 14.7 I 12.6 I 13.7 : 17.0 I 1.5.4 l 16.0 I 10.8 I t I I Dec. 10 I .5,893 I 14.7 I 12.5 I 13.4 I 16.9 15.2 I 16.2 I 10.8 " 20 I 6,130 I 15.1 I 12..5 t 13.1 I 16.9 1.5.1 I 16.3 t 10.9 II 31 I 6,379 t 1.5.2 I 12.6 I 12.8 I 16.8 1.5.0 : 16.6 11.0 I I I I I I Jan. 10 I 6;630 t 1.5.2 I 12..5 I 12.7 t 16.8 1.5.1 I 16.8 I 10.8 II 20 t 6,8.57 I 1.5.3 I 12.6 12.6 I 16.8 1.5.2 I 16.9 I 10..5 n 31 I 7,101 I 1.5.3 I 12.6 12.6 I 17.0 1.5.2 17.1 I 10.1 I t t : : Feb. 10 I 7,320 I 1.5.2 I 12.6 12.4 17.4 1.5.2 I 17.2 I 9.8 n 19 I 7 i 524 I 1.5.4 I 12.6 12.3 I 17.6 1.5.2 I 1 7 .l~ t 9.6 " 28 I 7,727 I 1.5.4 I 12.7 12.1 I 17.9 15.2 I 17.6 I 9.3 I I I I I I I Mar. 10 I 7,947 I 1.5.3 12.7 I 12.0 I 18.1 : 1.5.1 . 17.6 I 9.1 . II 20 r 8,164 I 1.5.2 I 12.8 t 12.0 I 18.4 I 1.5.1 a 17.8 I 8.8 " 31 I 8, 1~20 a 1.5.2 I 12.8 I 11.9 I 18.7 I 1.5.1 18.0 I 8.6 t I I I : t Apr. 10 I 8,653 1.5~1 I 12.7 I 11.9 I 18.8 1.5.0 18.0 I 8.3 " 20 I 8,~9 I 1.5.2 I 12.8 12~0 : 18.9 I 14.9 t 18.1 I 8.1 " 30 t 9,261 I 1.5.2 I 13.0 I 12..5 I 19.2 11~. 3 18.1 I 7..8 I t r t I I I t May 10 t 9,711 I 15.4 t 13.2 I 12.7 I 19.1 I 14.1 : 18.1 : 7.4 II 20 I 10~232 I 1.5.6 I 13.2 . 12.9 I 19.1 I 14.2 I 18.0 I 7.0 . n 31 I 10,712 I 1.5.7 I 13.0 I 13.0 . 19.2 14..5 I 18.0 I 6.7 . t I I t I I t I June 10 I 1l~140 t 1.5.6 I 12.9 l 12.9 t 19.3 t 1I~.6 I 18.1 I 6.5 " 20 r 11, 660 a 15.5 I 13.0 I 13.2 I 19.2 t 14.7 18.0 t 6.2 " 30 I 12,220 t 15.7 t 12.8 I 13.5 I 19.1 I 14.9 18.1 t .5.9 I I t t I I I July 10 : 13,129 I 15.6 I 13.2 t 13.8 I 18.8 I 1.5.1 17.7 t 5.7 " 20 : 1h,179 I 15.5 I 13.3 13.8 t 18.6 t 1.5.2 17..5 t 6.0 n 31 t 1.5, 01~5 t 15.5 t 13.3 t Ih.l t 18.h I 1.5.4 17.3 I 6.0 I I : I I -1~6- Rate of Pumping: A study of the accumulated pump hours of the well pumps for the past year, reveals that same pumps are being operated for much more than their proportionate share of the time, while others are being operated much less than their share. The percentage of the work done by each pump for tho past year is shown in the preoedring table. It is recommended that a record be maintained of the cumulative pump hours ex.. pressed as a percent and that an effort be made to maintain this near the average for all well pumps. Such a procedure would equalize the main.. tenance and depreciation on all pumps and motors, and would help to maintain a flow of raw water through the plant of nearly uniform quality. Type of Wells and Equipment: The present type of gravel wa.ll wells and their mechanioal equipment is very satisfactory and it is recommended that all future wells be built in conformity with past practice. If a softening plant is to be built or the discharge of Well No. 7 is to be delivered to the plant, then the present high service pump and motor in Well No. 7 will require replacement with equipment designed to operate under a lower head. ~Service Pipe Lines: At present all the wells deliver water through low pressure lines to a central reservoir at the pumping plant with the exoeption of Well No. 7 whioh is connected direotly to the distribution system and pumps against full City pressure. vihen a softening plant is oonstruoted, it will be neoessary to collect all the water at the site of the plant. Before that time, suoh practice is desirable since it tends to equalize the quality of the water and espeoially to minimize the effect of those wells having a high content of iron asis the case with Well No.7, since the discharge from !"all the wellswhioh may be pumped simultaneously \ will be thoro~ghly mixed in the central reservoir. -47'" "" The proposed locations of new wells were made with this in view and Drawing No.6 also shows the layout of low service piping which \a recommended for construction as new wells are added to the system. In connection with the construction of the three new wells, which are recorrnnended for installation in the near future, two new lines will be needed. One line will begin at Well No. 1 and follow the left bank of the river to Penn .Avenue as n 12 inch line. From Penn Avenue, it will continue as a 20 inch line, to provide for a future lateral on that street which will take the output from at least three additional welJ s at some future time. At the alley wost of Oakdale Avenue, it increo..sGS to a 24 inch pipe and so continues in a direct line to the pump station. Well No. 9 is proposed for a location near the alley end some 200 feet north of Oakdale Road. It will be connected to tho new main by a 12 inch line. Well No. 8 is proposed for a site in Oakdale Park, near the ooncession stand. It will be near the new main to which it is to be connected by a 12 inch line. The site of the proposed Well No. 10 is on Front Street some 300 feet south of Prescott Avenue. It will require a new 12 inch line to connect to the existing 24 inch low service line in Third Street which now serves Wells No.4 and 5. This arrangement of piping will permit the additional wells to be constructed as required and oonnected to the lovl service system with a minimum of piping and without interrupting the use of the other wells. . -48- In ostimating the oost of improving the water supply. all those items have beon inoluded ,.,hioh appear to be desirable .to have ,rlthin tho next year or so. This inoludes tho tests for dete~nining more accurately the extent and quantity or the total supply. the test . holes and test wells necessary to prove the desirability of tho proposed . well locations. the oonstruotion of threo new wells at locations n\lll1bered 8. 9 and 10, two for additional supply and one to replace the 20 year old well at the p\lll1ping station and all the piping roquired to conneot these wells to the p\lll1ping station reservoir. ESTIHATE OF COST Test holes to dotermine extent of the supply: 70 holes - - .. .. .. - - - - .. - Test holes to looate future wells: 7 wells, 2 holos per well- - - - - - - - - .. .. @ 15.00 :: Test wells at well sites: 6" x 80" -- 560 ft. - - - - - .. - .. - Construotion of 3 wells: Purchase of sites for Well No.9 and 10- .. Pipe line easement, Well No. 10- 3 Wells, complete, including equipment and buildings .. - Miscellaneous - - - - - .. - .. .. Equipment Exchange Well No. 7 - .. - .. - Cast Iron Pipe Line; in place: 1600 line ft., 24 inch.. .. .. - ..- .. - .. @ 7.25 300 line ft., 24 inch flexible joint, river crossing ~ .. .. - - .. - .. .. .. @ 14.50 800 line ft.. 20 inch - .. .. .. - - .. @ 5.70 1750 line ft., 12 inch.. .. - .. - - .. - .. .. @ 2.70 - trY. ;)15.00 - .. @ 2.25 co @. 200.00 '" - @ L.S. .. - .. .. @7500.00 .. _ .. - - .. .. @ L.S. .. .. .. - @ L.S. .. A Estimated Total Cost of Construction - - .. - .. - .. - - - : Legal. Engineering and Contingent, 10%- .. .. .. - - ... - - - Estimated Total Cost- .. - - - - .. - - .. - - .. ....- -49- :: ~~ 1,050.00 210.00 1,260..00 1+00.00 100.00 22,500.00 300.00 2,000.00 ::I 11,600.00 ::I !~,350.00 = 4,560.00 .. 4,725.00 -.- $53,055.00 . 5,305.00 $58,360.00