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<br />TABLE 2
<br />
<br />,J "
<br />
<br />" '
<br />
<br />
<br />0482
<br />
<br />\
<br />J:,
<br />rv - RESERVOm STOMdE CAPACITIES
<br />
<br />.
<br />
<br /><'.....-".
<br />4-01. Area Md.~~~~bItY~';..:Area and capacity'C1.1rVes for the
<br />reservoir are shown on plate 2, of the project report,. ,Topo-
<br />graphic maps used in the derivation of these curves were prepared
<br />from the topographic survey,of the area made during JUly and August
<br />1951. This map has a contour interval of 5 feet 'and a'scale of
<br />1 inch equals 50 feet; These maps were adjusted to account for ex-
<br />cavation of emban10nent material from the reservoir area. The area
<br />curve was determined by planimetering each 5-foot contour and plot-
<br />ting the computed points. The points were then connected by a smooth
<br />curve. The area at,};lll.$;h foot of elevation was then selected from the
<br />curve and the end-area method .1as used to compute the 'capacity curve,
<br />At the spillway crest,',elevation 6211, the total storage capacity of
<br />th~ reservoir,wou:),d be 406 acre-feet, at maxill1U1\l':water surface, eleva-
<br />tion 6215, 488 acre.feet, and at top of d~, elevation 6218, 552 acre-
<br />h~,' '
<br />
<br />.
<br />
<br />4-02. Reservoir ,storage and effects. -The required flood-
<br />control storage was based on the,statidardprojeci; flood deve~dl?ed:: ' ,
<br />from a volume st,andpoint as discussed in paragraph 3-01. The a:ll.9,ca~e4'
<br />flood control storage of 361 acre-feet' wou:),dco'1trol the standard"proj-
<br />ect flood to spillway crest (elevation 6211.0) with the outflow liJl)ited
<br />tQ ,the ungated ,sluice and tha secliment reserve Of 45 .aGre.,.;(eet' ass,timed
<br />depleted; 'The out~ow of the slmce"at spillway crelli::i~),:06 cubic,
<br />feet ,ller'tsecond. Al~~ough the staiidard project fJ;o'?<:t usecl for eCQ'l1bmic
<br />studieS, ;as described iri paragraph 3;';01, woul<1 be co'ntJ;'o:;tledat the'dani
<br />.:silt'e'; ,:.tl6w t,ioi:>m the unClontrdlledilrea plus flow through t.he,' , sluiclt',"
<br />wourd're:swt.:,Jin a regu1lj.ted:'peBkd:kschargeat Trinidacld;t''' about ',1~'670 "
<br />cubi9.f,ee(perse,cond..;Tiie::~fIQ'od':contrdl storage of 36:i.,~cr'e...t'eet is
<br />adequa:t.,e.'"to' ;,co.l).trol all:,tli-e ffl'oodtrGf ;record for maximuljl benefits. ,
<br />.:stormi',ru.noft'a$ C9mp,ute,d. f:t'6Yri' the estimated floods of record indicate
<br />thatb 'thei,maxim\1lll, volume Qf;'rurloff is about 40 percent of tlie standard
<br />\lyaje?, :t1lGcid, 'v,o.l~e. T'li~' 14 floods shown. in tabJe 1 are reduced by .
<br />res'e'rvb~r regulattQn,J,o 7. floods as sho.m ~n table 2.
<br />
<br />;'-1 ','
<br />
<br />REGULiWED PEAK DISCHJ\RGES
<br />PINON CANON ARROYO - 1914-50
<br />
<br />14 Ju4r
<br />25 July
<br />22 July
<br />
<br />1948
<br />1950
<br />1925
<br />
<br />Peak discharge
<br />at
<br />Willow street
<br />(c.r,s.)
<br />
<br />960
<br />770
<br />670
<br />
<br />Date of peak
<br />
<br />.
<br />
<br />-5-
<br />
<br />Appendix I
<br />
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