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                                    Keystone Lake
                          MONTHLY LAKE REPORT
                                 MAY 07


    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  723.79   523591
 1   723.72  723.97   527740  11667    11667   0.120   13750   0.09  0.21
 2   724.60  725.63   568270  11783    14390   0.020   34900   1.40  0.96
 3   725.91  726.33   586044  11958    18243   0.070   27225   0.01  0.06
 4   726.35  726.19   582419  11988    18286   0.030   16550   0.42  0.11
 5   726.08  725.74   571013  12350    18630   0.140   12950   0.00  0.00

 6   725.54  725.07   554301  12700    18955   0.100   10650   0.00  0.07
 7   725.20  727.78   624454  12042    12042   0.160   47400   0.86  1.94
 8   729.09  731.39   730072  11338    11338   0.000   64650   0.19  0.25
 9   732.61  734.19   820627  11542    26840   0.050   72600   0.59  0.80
10   735.11  737.07   919902  11758    42947   0.120   93100   0.00  0.19

11   737.71  737.84   947559  11713    50737   0.080   64850   0.04  0.14
12   737.67  737.55   937141  11713    53463   0.160   48500   0.00  0.05
13   737.45  737.21   924931  11667    49248   0.280   43450   0.00  0.00
14   737.05  736.86   912480  11625    45103   0.330   39150   0.00  0.00
15   736.78  736.53   900916  11617    39741   0.300   34050   0.00  0.12

16   736.37  736.31   893205  11492    34435   0.130   30800   0.00  0.04
17   736.32  736.07   884794  11417    29378   0.270   25400   0.00  0.00
18   735.84  735.34   859653  11488    29155   0.260   16800   0.00  0.00
19   735.08  734.54   832439  11529    28767   0.290   15350   0.00  0.00
20   734.24  733.66   802994  11588    28424   0.310   13850   0.00  0.00

21   733.35  732.51   765480  11725    30738   0.260   12050   0.00  0.00
22   732.04  731.10   721023  11663    34261   0.230   12000   0.00  0.03
23   730.83  730.34   697958  11725    33384   0.140   21954   0.00  0.01
24   730.20  729.80   681844  11754    32823   0.220   24700   0.00  0.74
25   729.60  729.43   671047  11650    29565   0.000   24150   0.51  0.27

26   729.42  729.34   668422  11454    25156   0.070   23900   0.00  0.01
27   729.29  729.35   668712  11658    25315   0.070   25450   0.08  0.10
28   729.56  730.13   691610  11671    32606   0.000   44250   0.08  0.67
29   730.17  730.14   691913  11742    41294   0.110   41550   0.00  0.04
30   730.06  729.88   684179  11475    37722   0.120   33900   0.15  0.52
31   729.88  730.00   687681  11717    32334   0.080   34350   0.00  0.18

TOTAL                        363209   936987   4.520 1024229   4.42  7.51
AVERAGE   731.53              11716    30225           33040 NORMAL= 4.42

MAXIMUM   737.96      951869   DATE=11    TOP CONSERVATION POOL    723.00
MINIMUM   723.70      521517   DATE= 1    TOP FLOOD POOL           754.00

                      INFLOW VOLUME=  2031528 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION