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<br />WESTERN ~OUNDAIl.T W!\H~ BIJLLHI~1 1%5 ImERN^T10N^L BOUND"l(y "'NO ....^TtR COMMISSION
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<br />PILOT KNOB POWER PLANT AND WASTEWAY NEAR PILOT KNOB. CALIFORNIA
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<br />OESCRLPT10N The Pile>! Knob power planl and wasTewJY is located On me All-American Canal, 20. B miles downstream
<br />from l11e Imake al ImperIal DJrn. 6 mIles ",;esl of Yuma. 300ut one mile north of !.he northerly InterllJ.IJonallx>undary aOO
<br />l'mpUeh LDlu the Alamo Can.llm the Unw-,d States and thence 11110 Colorado River through Rockwood gales, about one mile
<br />upstream from Ihe northerly lmernarlon,,[ l:xJundary. WOller-stage recorder Ls located On nght bank of me Ail-American
<br />Canal, 550 reel up~tTCam from wasteway gates and I. BOO feet from entrance 10 the power plant. !)alUITl of gage 19 lSO.OO
<br />(eet above mean ~eJ. level. Tailrace gage 19 on left bank, 680 reet downstream from power pl~nt with automatic recordlug
<br />~qUlpmenl In conITc..1 house. All bypass &,ates are equipp"d With calibr;tt~d Op"nInSB whlch are read on all gale changes.
<br />D,ltum of lJll,ace t:agl! Is ot mean seo le\'el; ell' varian of 5111 01 wasteway gatn 15 I.H. aa teel, U. S. C. 8< G. S. datum.
<br />PrlO, If) Ocmbe, 1956, !.hIS Slatlon puhll~hed as' Pilar Knob Wasle,,'ay near Pllot Knob, Cal1fo.fT1Ja.
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<br />RECORDS: Dally dlschuge IS compur"d I,om flowmeter equlpmenl aUll h~sd and operuugs on wasleway gates or f,om head
<br />and g,ue openln8 on wlckel .1nd waslew~y gates. Record~ fu,nished by the U. S. Ge,"logl~al Survey. Records available.
<br />July 1944 through Decemner 1965. The wa5teway was oJperaled !or the purposl! of dlVertiug Colorado Rive, waler to the
<br />Alamo CaD.l1 for use HI Mexkn from July 1944 10 November~, 1950, in dccordance with arrangemenrs between the United
<br />States and Ml'xICO 10, emergency use "I the All-American Car\;11 rocllltleb. Records SlOce 1950 show wale, ,eleased
<br />through Pd.>t Knob p,"wcr plonl and wasteway from the Ail-American Canal and r<,rurned lfJ the Colorado Rn.e, through
<br />R'lckwoodsates.
<br />REMARKS. Pllot Knob wasteway was compleled lfl 1938 and !.he Ilral. flow occu,red on February 5, 193Cl. PlIot Knob power
<br />plant w~s compl~led In Januaq' 1957 and the first 1101" occu.rred on Janull)' 14, 1957.
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<br />EXTREMES. MaXImum lIle.l.l1 d3lly dIBchaq;e, 8,35(1 sl'cood-feet on JaoullI)' 26, Pi58; minimum mean dilily dlschuge, no
<br />now duri"8long periods.
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<br />Mean Daily Di.chara:e in Second Feet 1965 - Annual and Period Summary
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<br />D., J,n. Feb. March April M., Jun. July AUI. Sept. Oct. N~, DK.
<br />, 0 0 1,48(1 2,040 0 0 2,130 2,360 1,390 0 0 0
<br />, 0 0 1,470 1,290 0 0 2,140 2,720 \,210 0 0 0
<br />, 0 0 1,460 4,210 0 0 2,250 2,950 1,270 0 0 0
<br />. 0 0 1,47(1 5,5JO 0 0 2,10(1 2,9110 1,34(1 0 0 0
<br />. ~1I3 0 1,480 11,040 0 0 2,1S0 2,840 1,200 0 0 0
<br />, 1,060 0 1,450 5,290 0 0 l,S80 2,50(1 838 0 0 0
<br />, 1,300 0 1,830 3,8"(1 0 0 2,210 l,a20 820 0 0 0
<br />, 1,180 '" 1,370 3,040 0 0 2,2.10 2.880 \,0110 0 0 0
<br />, %0 863 L,.350 3,260 0 0 1,330 2,680 sn 0 0 '06
<br />10 1,070 0 1,360 2,IIiO 0 0 2,300 2,640 0 0 0 1,67(1
<br />II 078 0 2,110 2,590 0 0 2,450 2,1140 0 0 0 1,..30
<br />12 1,100 0 2,2110 2,440 0 1,000 2,4110 1,700 0 0 0 1,540
<br />" 1,130 0 2,130 2,000 0 928 2,410 3,550 0 0 0 1,130
<br />" %, 0 2,740 2,310 0 1,130 2,310 3,310 0 0 0 1,210
<br />" %J 0 1,990 2,430 0 1,160 2,460 3,510 0 0 0 1,290
<br />" 560 0 2,460 2,300 0 1.210 1,400 3,210 0 0 0 1,310
<br />12 0 " l,7\l\l 2,180 0 1,24(1 2,41(1 3,010 0 0 0 1,460
<br />" 0 0 2,560 2,300 0 1,190 2,390 3,060 0 0 0 1,550
<br />19 0 0 2, l~O ~,l:2[} 0 I,C50 2,40(1 2,oJ(I 0 0 0 1,350
<br />" 0 0 1, 8~(I 1,860 0 939 2,530 2,730 0 0 0 1,690
<br />21 0 1,110 ],920 1,710 0 ],60(1 2,410 2,920 0 0 0 1,010
<br />" 0 l,IIU 1,85u 1,.47(1 0 1,980 2,12(1 3,410 0 0 0 \,920
<br />23 0 l,Q.40 1,860 1,150 0 2,150 2,550 2,650 0 0 0 2,060
<br />" 0 1,060 1,960 0 0 2,190 2,550 2,490 0 0 0 1,640
<br />" 0 1,150 1,%(1 0 0 2,160 2,510 2,660 0 0 0 1,890
<br />" 0 I,L50 1,%0 0 0 2,10(1 2,520 2,44U 0 0 0 3,340
<br />" 0 1,150 1,710 0 0 2,120 2,4!tO 2,441'l 0 0 0 3,800
<br />" 0 1,160 ],880 0 0 2,030 2,440 1,380 0 0 0 2,430
<br />29 0 2,030 0 0 2,150 2,530 2,42(1 0 0 0 I,JbO
<br />" 0 1,"50 0 0 2,170 2,411(1 1,690 0 0 0 1,130
<br />21 0 2,(120 0 2,3\0 I, II~O 0 L,OOO
<br />". IO,3M 65,280 30,4"7 85,090 0 37,578'
<br />II 925 58920 0 OJ "0 ]0050 0
<br /> Current Year \9115 Period ]944-1%5
<br /> Edrerne Gale , E:t:lrellle Second Feet Aye'lle Total Acre Feel
<br />Month Feet Hilh f...- Low Second
<br /> Hllh Low D. D., h.t Acre Feet Aye.all MuilllUIII I Minllllurn
<br />J..n. , 1.300 , I 0 385 23,653 43,06/l 400,200 0
<br />Fnb. 28 1,100 , I 0 320 20,5117 l3,874 149,500 0
<br />.,.,., " 2,740 9 ],350 1,"00 116,861'1 53,714 279,300 0
<br />A~r . , 0,040 H' 0 2,180 12'1,481 87,882 260,900 0
<br />..., 0 0 0 0 25,192 1115,400 0
<br />,~. " 2,190 , I 0 1,020 60,490 07,418 204,300 0
<br />July ,23 2,550 . 1,880 2,300 144,992 113,717 260,00(1 0
<br />'"8 13 3,550 Ji 1,080 2,740 1118,774 IL7,445 270,100 0
<br />Se~t. I 1,3'10 ,,0 0 135 1'1,9H 65,005 173,300 0
<br />Oct. 0 0 0 0 13,643 51,460 0
<br />/iOY. 0 0 0 0 Ill,8i4 182,600 0
<br />"", 21 J,8M , I 0 1,2]0 74,535 J8,552 319,700 0
<br />.~l,. 11,040 0 1,051) 75'1,292 059,382 1,944,700 0
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<br />11 Meandally
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<br />1 Andolhe, daYII
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