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                                  Heyburn Lake
                          MONTHLY LAKE REPORT
                                 JAN 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  761.75     7333
 1   761.75  761.78     7359      0       14   0.060      10   0.00  0.01
 2   761.77  761.75     7333      0       15   0.010      10   0.22  0.19
 3   761.76  761.73     7315      0       13   0.100      10   0.00  0.00
 4   761.73  761.73     7315      0       11   0.070      10   0.00  0.00
 5   761.73  761.70     7289      0       10   0.050      10   0.00  0.00

 6   761.70  761.70     7289      0        9   0.060      10   0.00  0.00
 7   761.71  761.72     7306      0       10   0.060      10   0.00  0.00
 8   761.72  761.74     7324      0       11   0.000      10   0.00  0.00
 9   761.72  761.72     7306      0       11   0.010      10   0.00  0.00
10   761.72  761.72     7306      0       10   0.040      10   0.00  0.01

11   761.71  761.72     7306      0       10   0.050      10   0.00  0.00
12   761.72  761.76     7342      0       11   0.160      10   0.00  0.00
13   761.74  761.73     7315      0       12   0.090      10   0.00  0.00
14   761.73  761.72     7306      0       11   0.020      10   0.00  0.00
15   761.72  761.72     7306      0       10   0.070      10   0.00  0.00

16   761.72  761.72     7306      0       11   0.070      10   0.00  0.00
17   761.73  761.72     7306      0       11   0.060      10   0.00  0.00
18   761.72  761.72     7306      0       11   0.110      10   0.00  0.00
19   761.71  761.72     7306      0       10   0.180      10   0.00  0.00
20   761.72  761.71     7298      0       10   0.120      10   0.00  0.00

21   761.72  761.72     7306      0       10   0.090      10   0.00  0.00
22   761.72  761.74     7324      0       11   0.110      40   0.00  0.00
23   761.74  761.73     7315      0       12   0.020      30   0.35  0.21
24   761.73  761.72     7306      0       11   0.070      20   0.00  0.00
25   761.72  761.72     7306      0       11   0.130      10   0.00  0.00

26   761.72  761.71     7298      0        9   0.030      10   0.00  0.00
27   761.72  761.72     7306      0       10   0.140      10   0.00  0.00
28   761.73  761.72     7306      0       11   0.060      10   0.00  0.00
29   761.72  761.75     7333      0       12   0.070      25   0.08  0.10
30   761.79  764.02     9615      0      163   0.010    1300   0.42  0.70
31   764.18  763.74     9311      0      633   0.010     500   1.18  1.06

TOTAL                             0     1116   2.130    2165   2.25  2.28
AVERAGE   761.87                  0       36              70 NORMAL= 1.49

MAXIMUM   764.18        9803   DATE=31    TOP CONSERVATION POOL    761.50
MINIMUM   761.68        7271   DATE=26    TOP FLOOD POOL           784.00

                      INFLOW VOLUME=     4294 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION