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                                  Big Hill 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  856.15    24808
 1   856.15  856.05    24693      0       76   0.110      10   0.00  0.00
 2   855.99  856.04    24681      0       29   0.240      40   0.00  0.00
 3   856.07  856.06    24704      0        0   0.090      20   0.23  0.21
 4   856.04  856.05    24693      0        0   0.040      20   0.00  0.00
 5   856.05  856.09    24739      0        0   0.210      10   0.00  0.05

 6   856.08  856.04    24681      0        0   0.320      10   0.00  0.00
 7   856.05  856.05    24693      0        0   0.290      10   0.00  0.00
 8   856.06  856.09    24739      0        0   0.300      10   0.00  0.00
 9   856.04  856.08    24727      0        0   0.380       5   0.00  0.00
10   856.07  856.03    24670      0        0   0.250       5   0.00  0.00

11   856.03  856.04    24681      0        0   0.370       5   0.00  0.00
12   856.04  856.05    24693      0        0   0.260       5   0.00  0.00
13   856.02  856.11    24762      0        0   0.290      35   0.00  0.01
14   856.85  858.23    27246      0        3   0.050    1250   1.98  1.95
15   858.66  858.73    27849      0       66   0.000     380   0.69  0.83

16   858.68  858.64    27740      0       77   0.220      30   0.00  0.00
17   858.62  858.56    27644      0       62   0.150      20   0.01  0.01
18   858.56  858.49    27559      0       49   0.130      20   0.00  0.00
19   858.47  858.44    27499      0       38   0.360      20   0.00  0.00
20   858.41  858.41    27463      0       31   0.350      20   0.00  0.00

21   858.41  858.38    27427      0       29   0.410      20   0.00  0.00
22   858.40  858.49    27559      0       31   0.240     100   0.54  0.45
23   858.52  858.55    27632      0       45   0.080      90   0.27  0.26
24   858.53  858.55    27632      0       51   0.010      50   0.05  0.03
25   858.63  860.02    29429      0      232   0.040    1140   0.43  0.40

26   859.93  860.22    29681      0      497   0.000     620   1.20  1.05
27   860.19  859.88    29256      0      541   0.000     330   0.85  0.87
28   859.71  859.43    28703      0      385   0.110     110   0.03  0.03
29   859.31  859.15    28359      0      248   0.030      80   0.00  0.00
30   859.05  858.95    28114      0      160   0.100      50   0.00  0.00

TOTAL                             0     2651   5.430    4515   6.28  6.15
AVERAGE   857.66                  0       88             151 NORMAL= 3.78

MAXIMUM   860.22       29681   DATE=26    TOP CONSERVATION POOL    858.00
MINIMUM   855.99       24624   DATE= 2    TOP FLOOD POOL           867.50

                      INFLOW VOLUME=     8955 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION