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                                     Cheney Lake
                          MONTHLY LAKE REPORT
                                 APR 99


    POOL ELEVATIONS  STORAGE     RELEASES       EVAP  INFLOW   RAINFALL
DAY      FT-NGVD     2400HR         DSF        INCHES   ADJ     INCHES
      0800    2400    AC-FT   POWER    TOTAL  8A TO 8A  DSF    7A TO  7A
                                                               DAM   BSN
PRIOR MONTH 1422.07   171565
 1  1422.06 1422.06   171467      0      245   0.210     200   0.00  0.00
 2  1422.04 1422.03   171171      0      245   0.150     200   0.00  0.00
 3  1421.97 1421.88   169735      0      245   0.210     200   0.48  0.54
 4  1421.84 1422.00   170875      0      245   0.080     450   0.00  0.02
 5  1422.13 1422.02   171072      0      245   0.390     450   1.35  0.94

 6  1421.87 1421.99   170780      0      245   0.250     400   0.00  0.01
 7  1421.99 1422.23   173142      0      245   0.210     500   0.00  0.00
 8  1422.40 1422.24   173241      0      405   0.130     300   0.00  0.00
 9  1422.18 1422.29   173735      0      491   0.560     200   0.00  0.00
10  1422.09 1421.89   169830      0      491   0.170       0   0.00  0.00

11  1421.60 1421.47   165839      0      488   0.330       0   0.00  0.00
12  1421.37 1421.45   165648      0      246   0.280       0   0.00  0.00
13  1421.51 1421.66   167645      0        0   0.240       0   0.00  0.00
14  1421.74 1421.70   168024      0        0   0.110     300   1.40  0.84
15  1421.44 1421.32   164413      0        0   0.150     500   0.93  1.05

16  1421.18 1423.17   182473      0        0   0.240    7400   0.00  0.00
17  1423.26 1423.25   183290      0        0   0.220     500   0.11  0.00
18  1423.26 1423.29   183699      0        0   0.140     400   0.41  0.02
19  1423.33 1423.28   183597      0      269   0.300     350   0.00  0.00
20  1423.26 1423.17   182473      0      764   0.230     300   0.00  0.00

21  1423.13 1423.00   180734      0     1152   0.260     400   0.00  0.00
22  1422.94 1422.81   178861      0     1236   0.240     400   0.04  0.00
23  1422.80 1422.59   176691      0     1234   0.190     200   0.29  0.37
24  1422.57 1422.42   175016      0     1232   0.020     450   0.12  0.02
25  1422.42 1422.36   174424      0     1230   0.070     950   0.66  0.35

26  1422.30 1422.28   173636      0     1229   0.030     900   0.54  0.29
27  1422.21 1422.10   171861      0     1227   0.070     650   0.07  0.09
28  1422.06 1421.94   170304      0     1226   0.230     500   0.00  0.00
29  1421.89 1421.86   169545      0      892   0.110     400   0.02  0.00
30  1421.85 1421.74   168404      0      489   0.120      50   0.00  0.00

TOTAL                             0    16015   5.940   17550   6.42  4.54
AVERAGE  1422.25                  0      534             585 NORMAL= 2.32

MAXIMUM  1423.33      184107   DATE=19    TOP CONSERVATION POOL   1421.60
MINIMUM  1421.10      162323   DATE=16    TOP FLOOD POOL          1429.00

                      INFLOW VOLUME=    34810 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION