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                                  Keystone Lake
                          MONTHLY LAKE REPORT
                                 DEC 97


    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  719.40   431162
 1   719.50  719.67   436345   1333     1333   0.040    3950   0.00  0.00
 2   719.82  720.05   443677   1009     1009   0.040    4725   0.00  0.01
 3   720.28  720.61   454841    741      741   0.010    6375   0.35  0.50
 4   720.77  721.18   466371      0        0   0.030    5875   0.00  0.00
 5   721.35  721.63   475756   1165     1165   0.090    5925   0.00  0.00

 6   721.80  722.17   487196      0        0   0.060    5825   0.00  0.00
 7   722.31  722.69   498589      0        0   0.060    5750   0.00  0.01
 8   722.84  722.84   501876   3987     3987   0.020    5650   0.07  0.21
 9   722.92  723.02   505842   3996     3996   0.000    6050   0.00  0.01
10   723.10  722.92   503628   5892     5892   0.090    5400   0.00  0.02

11   722.98  722.87   502533   6155     6155   0.030    5400   0.00  0.00
12   722.91  722.77   500342   6208     6208   0.040    5200   0.00  0.02
13   722.86  722.94   504067   3696     3696   0.010    5175   0.00  0.00
14   723.02  723.01   505612   3656     3656   0.050    4400   0.00  0.00
15   723.02  722.92   503628   4701     4701   0.070    4300   0.00  0.00

16   722.95  722.92   503628   4476     4476   0.060    4300   0.00  0.00
17   722.95  722.90   503191   4355     4355   0.180    4300   0.00  0.00
18   722.97  722.83   501657   5194     5194   0.090    4300   0.00  0.00
19   722.79  722.82   501438   4489     4489   0.130    4350   0.00  0.00
20   722.95  723.22   510452      0        0   0.130    4550   0.00  0.00

21   723.43  723.94   527049      0        0   0.020    8375   0.41  0.60
22   724.10  724.29   535427   4087     4087   0.010    8300   0.23  0.34
23   724.50  724.90   550143   5799     5799   0.010   13200   0.00  0.01
24   725.61  727.64   620673   2666     2666   0.000   38250   1.45  1.19
25   728.52  730.03   688589   6653     6653   0.010   40925   0.00  0.14

26   730.88  732.27   757774  12123    12123   0.020   47050   0.00  0.02
27   732.82  733.64   802335  11842    11842   0.040   34400   0.00  0.00
28   733.91  734.24   822314  11736    11736   0.090   21825   0.00  0.00
29   734.40  734.27   823328  11738    13388   0.030   14000   0.03  0.04
30   734.25  733.58   800355  11831    22178   0.110   10700   0.00  0.00
31   733.56  733.07   783524  11885    20050   0.110   11700   0.00  0.00

TOTAL                        151413   171575   1.680  350525   2.54  3.12
AVERAGE   725.09               4884     5535           11307 NORMAL= 2.26

MAXIMUM   734.40      827715   DATE=29    TOP CONSERVATION POOL    723.00
MINIMUM   719.40      431162   DATE= 1    TOP FLOOD POOL           754.00

                      INFLOW VOLUME=   695256 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION