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•2007-12-14 11:42 MNVALLEY 5072483501 » 952 474 4193 P 9/16 <br /> PRESSURE DISTRlBUTlQN SYSTEM <br /> Ak OoxeO�ecta�pks mus(De entercd.tne resl wlll De cakulafed, <br /> 1. Select number of pert�rated laterals: � •�••�^ �•�• �•��~• <br /> _..__,..._._._._._...--,--•-------- <br /> f:•_..._._..-_-_.._.._....._�. ___.. _�_. <br /> 2. Selea perfo�tion speGng- �fc � . .. ,~,�.. _.... ,yl,� .,..�-" JI <br /> �.�.: .., <br /> � <br /> 3. 5ince perforvtions should not bs placed ciose�that 1 foot to ::' ':'::«".:. -�� <br /> the edge of the rac�c layer(see diag►em).9ubV8Ct 21ee!irom <br /> the rodc iayer Ie h <br /> 63 -2ft- 81 ft <br /> 4 Dekrmine the number of spBCes beMreen perbratio�s. <br /> bivide the length(3)by perforation specing(2)and round down to nearest whole number. <br /> Perforation spaCing= B 1 ft/ 3 fl= 20 <br /> 5. Number of perforatwna is equal to one plus the number of perforation 9p9oe9(4), <br /> •Check figu►e E-4 ta assure the number oi perfaations per tate�a�gua�sntees <br /> <�p96 discharge varialion. <br /> 20 spaoe9 t t = 21 perforationsllateral <br /> E-+►MaYtmum Number of 1l4 lnth perforstlone E-6 PeAonUon Dlsch�r e M GPM <br /> r Istsral ta uarsr�.<10'�4 dllch�r e vartallon Head Pe�iorations diamefer <br /> Perioration feet inChes <br /> 5pecing 3/16 7132 1l4 <br /> feet t inch 1.25 inch 1.5 inch 2.0 inCh �° O.A2 0.56 0.74 <br /> 2.5 8 �a �e 28 2° 0.59 0.a0 1,04 <br /> 3.0 8 13 17 26 5 0.94 1.26 1.65 <br /> 3.3 7 12 16 25 s. Uas 1.o roart fa ilnpNam�h►wme�. <br /> 4,0 7 11 15 23 b.Use Z.o taes tor�yu�:�p ase <br /> 5.0 8 1� 14 22 <br /> 6. A.Total number of perforations=pertorations pe�lateral(5)times number of faterals(1). <br /> 2t perfs�lat z 3 faterafa= 83 pertorations <br /> 8.Caloulele the bquare footage per perforetion. <br /> Recommende0 value Is 8-10 sqNperf.Does not apply to al�►ades. <br /> 1, Rock bed ares=rock w�dth(R)x rodc length(R) <br /> 10 R x 63 ft= 630 tt� <br /> 2. Square foot per perfcratfon=Rodc Bed Area/numbar of perts(6) <br /> 830.0 f►� r 63 verls = 10.0 ��perf <br /> 7. Determine requ�red Aow rate by multlptying the total number <br /> of perlotetlons{6A)by flow per pe�foraGons see figure E-8} <br /> 63 peris x 0.74 gpm 1 perfs= 46.6 gpm <br /> 6. N laterals are connected to header pipe as shown . ��--'' <br /> in Figure E-1,to eeleCt minimum required late►al � , <br /> diameter;enter figure E-4 with pe�toratio�spacing(2?and ,�� . . <br /> number of peAorations per laterat(5). �w�.•r•� No�.+v�.+�w.a a�^dawn.�.. <br /> Select minimum diameter for pecforated letersfs= �inches <br /> 9. If peAorated laterai syatem is attsched to manifold pipe ��;„�;°;,�� � , <br /> near the center,like Figure E-2,peffordted Iateral length(3) . . <br /> and number oI pertorations per Istet�l(5)will be approximatety � <br /> one helf of that in step 8. Using these value9,seleCt ��';�' <br /> minimum diameter for peAo�eted leteral' QinChes. ' <br /> I hereby certify that I have completed Ihis work in accordance with afl apDNCiible OrdlnanCe6,rulps and lawa. <br /> Randy malkow DRP Reelt 5327 <br /> MN Valley E�ccsvating Lic i12085 17J12l07 <br /> Page 1 of� <br />