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                                    Keystone Lake
                          MONTHLY LAKE REPORT
                                 MAY 03


    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  728.00   630394
 1   728.07  727.90   627694   6098    16745   0.340   15650   0.00  0.04
 2   727.81  727.55   618242   6133    19678   0.330   15100   0.00  0.00
 3   727.44  727.19   608522   6184    19469   0.200   14700   0.00  0.00
 4   727.13  727.06   605011   6189    19250   0.170   17700   0.00  0.00
 5   727.04  726.60   593034   6189    19114   0.310   13350   0.00  0.00

 6   726.39  726.33   586044   6190    15942   0.340   12700   0.00  0.00
 7   726.22  725.85   573757   6193    14718   0.310    8750   0.00  0.00
 8   725.70  725.60   567521   5018    10396   0.310    7350   0.00  0.02
 9   725.51  725.42   563031   6049     8220   0.130    6150   0.00  0.02
10   725.39  725.43   563281   5866     5866   0.230    6200   0.45  0.24

11   725.39  725.35   561285   5865     5865   0.290    5100   0.08  0.00
12   725.30  725.11   555299   5874     5874   0.290    3100   0.00  0.00
13   725.04  724.85   548936   5863     5863   0.360    2700   0.00  0.00
14   724.77  724.63   543630   5858     5858   0.050    3350   0.31  0.11
15   724.58  724.53   541218   5896     5896   0.230    4750   0.35  0.08

16   724.56  724.72   545800   5892     5892   0.120    8250   0.65  1.42
17   724.89  725.74   571013   1729     1729   0.050   14500   1.03  0.60
18   726.13  726.92   601319    242      242   0.080   15750   0.00  0.00
19   727.35  728.83   653722   5803     5803   0.270   32400   0.00  0.01
20   729.29  729.58   675425   5942    10470   0.230   21550   1.54  0.11

21   729.55  729.50   673090   6011    15034   0.160   14000   0.00  0.00
22   729.46  729.25   665795   6049    15900   0.130   12400   0.00  0.00
23   729.16  729.22   664918   6007    11860   0.240   11500   0.00  0.02
24   729.21  729.28   666671   6051    10092   0.090   11100   0.01  0.45
25   729.39  729.71   679219   6060    10136   0.140   16550   0.36  0.50

26   729.98  730.78   711256   6071    10266   0.120   26650   0.00  0.00
27   731.10  731.42   731007   5965    16402   0.230   26600   0.00  0.00
28   731.41  731.24   725391   5987    20084   0.290   17500   0.00  0.00
29   731.11  730.79   711557   5918    19686   0.270   13050   0.00  0.00
30   730.58  730.21   694029   5978    19609   0.370   11100   0.00  0.00
31   729.98  729.50   673090   6038    19313   0.390    9000   0.00  0.00

TOTAL                        175208   371272   7.070  398550   4.78  3.62
AVERAGE   727.62               5652    11977           12856 NORMAL= 4.42

MAXIMUM   731.42      731007   DATE=27    TOP CONSERVATION POOL    723.00
MINIMUM   724.52      540976   DATE=16    TOP FLOOD POOL           754.00

                      INFLOW VOLUME=   790512 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION