WSP08461

• File Number: 8220.101.12
• Description: Glen Canyon Dam/Lake Powell
• State: AZ
• Basin: Colorado Mainstem
• Date: 2/10/1988
• Title: Annual Operating Plan - 1988
• Water Supply Pro - Doc Type: Annual Report

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TJ ~LL ANNUAL OPEPATING PLAN PECIPIENTS:
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THIS ANNUAL DFF~ATIN~ DlIN REFLECTS THE BU~EAU ~F PEel_MATrON'S ANTICIDATEO DPeRATIU14 dF CJLGR400 ~IV~P. SYSTe~ RESc~VDIqS

THROUGH ScPTEHB~R, 1~~~. RASED UPON CUR~ENT WATER SUPPLY PRVJECTIONS, FLOOD CONTROL RELEASES ~ILL ~f qf~Ul~~O F~P THf

(' MONTH ~F FEoRU'~Y. ~ELEASfS ~A~CH 1988 TH~OUGH AUGUST ~RE p~OJeCTEO TJ SATISFY VQwNSTREAH WATER O~DE~S A~O Rli~R 4NO

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REStRVOIR PEGULATI~N. THE REST OF THE STUDY, WHICH P~OJECTS OPERATIONS THROUGH WATER YEAR 1~99 WIll BE SUlJE:I IJ

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OE-EVALUATIUN IN JUNE 1999 TO PEPlFCT CHANGING CONDITIONS.

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RUNOFF P.~JECTI~NS INTO LAKE PUWELL PROVIDED !Y T"E COLORADO RIVET FORECASTING SERV[C, TH~OUGi THE NIIIONIL WEIT"EP

SERVItE'S CULOR.OO aASIN RIVER FORECAST CENTER ARE AS PULLOWS'

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THE FOREtaST~ FO~ FEB~UA~Y9 HlRCH .N~ APRIL INFLOWS l~E FOR 95~, ~3~ IND l05~ OF TH~ 25 'E!q lVEQ4GE qeSPfcrrVELT.

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THE EXTENDED UUTLDOK fOR INFLOW INTO LAK! POWELL FOR THE PERIOD APRiL IHRU JULY IS T.5 MILLION.AlRE-PEEI 'NO [S 93~ O' "CQ.IL.

THE FI'IAL Ft3RUARY FOREtAST 'OR 'PRIL-JULY INFLOW TO LAXE POWELL OF T.5 MAF IS SU85TANIIALLT H[GHER T"'N T.E F[NAL JANUAR'

(~ FORECAST UF 6.3 HAF. JANUART FRECIPITATIOH RA~GED fROM 8!lOW TO NEAR lVERlGE IN THE UPPER GREoN R[YER 3A;[N. 3UI 'AS

_OSTLY AgUVE AVERAGE OVER THE REST UF THE UPPER COLORADO BASIN, W[TH T"E HIGHEST 'tCUH~LAT[ONS OCCURRING OtER THE .UNN[SO"

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AND SAN JUAI~ DP.AINAGES. SIHILARllY, THE CURRENT SNDWPACK IS BELOW .VE~AGE DY~R THE UPPER GREE~ 8A~IN .NO ~EAR AV~QaGE ov:q

(' THE REST UF THE UPPER COLORADO BASIN. WITH THE UPPERMOST PORTIO~S OF THE CClO~IOO M~IN3TE" AND rHE ANIMAS OQAI~AGE5 S~OU[N;

T~e HIGH~~T PERCEhTAG~S CF AYE~'G(.

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