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                                    Keystone 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  723.15   508839
 1   722.76  722.58   496180   6238    14828   0.190    8600   0.00  0.00
 2   722.69  723.27   511605   2463     2463   0.180   10300   0.00  0.00
 3   723.59  724.18   532774      0        0   0.110   10700   0.22  0.71
 4   724.40  724.99   552314      0        0   0.090   10050   0.00  0.00
 5   725.35  725.88   574506   3374     3374   0.260   14750   0.06  0.24

 6   725.95  725.61   567771   6044    12977   0.270    9800   0.00  0.04
 7   725.39  724.99   552314   6382    20192   0.280   12550   0.00  0.00
 8   724.77  724.90   550143   6423    19973   0.190   19100   0.00  0.01
 9   725.02  725.17   556795   6450    20090   0.310   23700   0.00  0.00
10   725.26  725.30   560038   6522    20340   0.280   22150   0.00  0.00

11   725.28  725.19   557294   6560    20361   0.230   19150   0.00  0.00
12   725.14  725.19   557294   6515    18335   0.220   18550   0.00  0.00
13   725.27  725.40   562533   6360    14931   0.280   17650   0.00  0.00
14   725.37  725.31   560288   6400    14973   0.130   13850   0.20  1.28
15   725.16  724.82   548213   6354    14870   0.040    9000   0.00  0.40

16   725.18  726.58   592517   9791    20560   0.260   43000   0.00  0.00
17   727.56  729.24   665502  12655    26377   0.140   63200   0.00  0.02
18   729.93  730.77   710953  12334    26906   0.050   50000   0.00  0.00
19   730.90  731.16   722895  12037    26900   0.250   33200   0.00  0.00
20   731.19  731.16   722895  12031    26996   0.310   27450   0.00  0.00

21   731.11  731.07   720088  12139    27055   0.410   25850   0.00  0.00
22   731.03  730.96   716696  12090    26975   0.240   25450   0.30  0.49
23   730.90  730.71   709140  12335    29765   0.180   25950   0.00  0.02
24   730.75  731.21   724457  12432    32059   0.010   39800   0.00  0.02
25   731.86  736.20   889350  12073    32785   0.010  115950   2.17  2.04

26   738.22  742.64  1133185   7115    18347   0.020  141350   1.19  0.62
27   744.70  747.19  1331085   5691    21400   0.060  121500   1.01  0.39
28   747.80  748.41  1388041  10976    45728   0.240   74650   0.00  0.00
29   748.43  748.31  1383303  11301    46825   0.160   44650   0.00  0.01
30   748.20  747.89  1363517  11186    40214   0.130   30550   0.00  0.00

TOTAL                        242271   646599   5.530 1082450   5.15  6.29
AVERAGE   730.54               8076    21553           36082 NORMAL= 2.78

MAXIMUM   748.43     1388990   DATE=29    TOP CONSERVATION POOL    723.00
MINIMUM   722.47      493769   DATE= 1    TOP FLOOD POOL           754.00

                      INFLOW VOLUME=  2147007 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION