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<br />9. <br /> <br />Controlling Wellther Modification Operations (continued) <br /> <br />1'""'\ <br /> <br />the State Patrol, and field maintenance personnel in the seeded areas. <br /> <br /> <br />Changing weather conditions that would indicate the onset of potentially <br /> <br />geVere Or hazardou.. weath..r conditions wili resuit in the suspension <br /> <br /> <br />of seeding operations throughout the duration of these potentially <br /> <br />hazardous weather conditions. <br /> <br /> <br />Snowpack accumulation will be monitored from snow survey <br /> <br /> <br />measurements as conducted by the Soil Congervation Service. Special <br /> <br /> <br />snow measurements may be available from selected high mountain sites <br /> <br /> <br />about January 1,2001 Regular snow measurement will commence for <br />,.,'.... <br /> <br />all snow obaervation sttes on February 1, 2001 and the first detailed <br /> <br /> <br />analysis of snow accumulations In the seeded areas will be completed <br /> <br /> <br />uBeing these measurements. Several mutually agreeable snow measuring <br /> <br /> <br />/ sites including the Snotel sites will be selected throughout the seeded and adjacent areas to monitor the <br /> <br />seasons accumulation of snowpack. <br /> <br />Evaluations of snowl'ack and snoWlll,d t runoff in the springt1me <br />Indicate that minor flooding and ..lream flow problems csn exist <br />when late winter snowpacks reach 150 percent of normal. More sub- <br />stantial flooding prOblems can be anticipated when late winter snow- <br />packs in excess of 170 percent of nOrD.al melt off in the srpingt1me. <br />Since this program Is desIgned for reasonable levels of snowpack <br />enhanct!:ment for an uuclouk uf un atl~(lul.&tuly tllJundant summertime water <br />""pply for ..toras.. a"d u...., W<: prol'o.... to """I,,,,,d ..eeding operations <br />in any ..aJor porlion ot a .."..dJng un:a wll.." o".._or mor.. of the <br /> <br />1'""'\ <br /> <br />fullowing occurt'l!UCutt lukutl ItlaclJ: <br />, <br />1\. When the average snowpack reaches 115 percent of normal <br />snowpack through December and 160 percent of, nOIIIIA1 for January. <br />b. When the average sno~'ack reaches ISO percent of norma} <br />snowpack during the month of February. <br />c. When the average snowpack reache.. l4(J ('"rc,,"t of nonnal <br />snowpack durinll th.. month of March. <br /> <br />Seeding operatIons would continue in th.. remainIng mountain regions <br /> <br />under normal "Opeca1:1v~ proccuur~.bI.. 'l'hl.tf. cUlUpunJ[lv~ normsl for these <br /> <br />rel'reselltative allow uba..rvatloll ait.... wlll he tll.. latest fifteen-year <br /> <br /> <br />average as publiehed by L1... Soil Cons"rvatiol1 Service. <br /> <br />,,-...., <br />