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                                  Keystone Lake
                          MONTHLY LAKE REPORT
                                 APR 98


    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  739.65  1014756
 1   739.45  738.96   988708   5715    34481   0.170   21625   0.00  0.02
 2   738.71  738.11   957361   5721    35310   0.250   21500   0.00  0.00
 3   737.88  737.28   927445   5862    34979   0.380   21500   0.01  0.01
 4   736.98  736.51   900214   5909    34309   0.410   21500   0.00  0.00
 5   736.35  736.01   882691   5417    33332   0.090   21500   0.00  0.00

 6   735.85  735.51   865496   5911    33466   0.050   24550   0.00  0.00
 7   735.39  734.95   846277   6004    34636   0.280   25150   0.03  0.46
 8   734.80  734.46   829740   6014    35868   0.200   27725   0.05  0.09
 9   734.28  733.95   812565   6028    35367   0.200   27025   0.00  0.01
10   733.82  733.47   796724   9267    34878   0.200   27000   0.00  0.00

11   733.28  732.76   773508  12135    34821   0.240   23525   0.00  0.00
12   732.49  732.03   750067  12376    34449   0.430   23075   0.00  0.00
13   731.79  731.28   726641   7998    34434   0.460   22975   0.00  0.01
14   731.01  730.39   699468   6095    34704   0.380   21400   0.00  0.00
15   730.12  729.77   680970   6154    30311   0.440   21225   0.00  0.03

16   729.56  729.00   658499   6166    25053   0.270   13850   0.00  0.04
17   728.75  728.32   639388   6279    22796   0.160   13325   0.00  0.00
18   728.13  727.77   624184   6320    20329   0.200   12825   0.00  0.00
19   727.58  727.20   608792   6404    19991   0.200   12650   0.00  0.00
20   727.03  726.67   594846   6429    19602   0.220   12425   0.00  0.00

21   726.52  726.14   581124   6382    19114   0.100   12350   0.00  0.14
22   725.95  725.54   566024   6353    17165   0.220    9725   0.00  0.00
23   725.41  725.06   554052   6364    15061   0.220    9225   0.00  0.00
24   724.89  724.60   542905   8677    13859   0.280    9100   0.00  0.00
25   724.51  724.37   537357  12019    12019   0.480    9000   0.00  0.00

26   724.35  724.76   546766  11767    11767   0.430   16525   0.00  0.29
27   725.36  730.96   716696  11855    11855   0.020   97550   6.00  1.53
28   732.45  733.65   802665  11952    19630   0.030   63000   0.46  0.69
29   733.83  733.77   806625  12166    35052   0.030   37100   0.00  0.07
30   733.60  733.06   783194  12231    39800   0.050   28100   0.00  0.00

TOTAL                        237970   818437   7.090  708025   6.55  3.39
AVERAGE   731.21               7932    27281           23601 NORMAL= 2.78

MAXIMUM   739.65     1014756   DATE= 1    TOP CONSERVATION POOL    723.00
MINIMUM   724.35      536874   DATE=26    TOP FLOOD POOL           754.00

                      INFLOW VOLUME=  1404346 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION