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                                  Foss Lake, OK
                          MONTHLY LAKE REPORT
                                 APR 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 1640.23   166230
 1  1640.23 1640.27   166490      0        5   0.400     100   0.00  0.00
 2  1640.28 1640.34   166943      0        5   0.120     100   0.00  0.00
 3  1640.36 1640.49   167915      0        5   0.140     740   0.00  0.84
 4  1640.73 1640.96   170961      0        5   0.100    1580   2.96  1.81
 5  1641.03 1641.18   172423      0        5   0.150     800   0.24  0.28

 6  1641.26 1641.33   173424      0        5   0.380     560   0.00  0.00
 7  1641.35 1641.44   174159      0        5   0.210     430   0.00  0.00
 8  1641.47 1641.51   174627      0        5   0.270     280   0.00  0.02
 9  1641.52 1641.59   175161      0        5   0.100     270   0.00  0.04
10  1641.62 1641.94   177499      0        5   0.030    1200   0.07  0.07

11  1642.16 1642.40   180660      0        5   0.040    1620   2.75  1.63
12  1642.54 1642.70   182730      0        5   0.110    1070   0.03  0.00
13  1642.78 1642.90   184110      0        5   0.110     750   0.00  0.00
14  1642.97 1643.06   185227      0       99   0.195     720   0.00  0.00
15  1643.10 1643.16   185938      0      252   0.280     670   0.00  0.00

16  1643.18 1643.19   186150      0      311   0.280     550   0.00  0.00
17  1643.20 1643.74   190061      0      312   0.170     450   0.00  0.00
18  1643.80 1643.85   190843      0      313   0.220     400   0.00  0.00
19  1643.86 1643.86   190915      0      313   0.230     320   0.00  0.00
20  1643.86 1643.84   190772      0      313   0.260     290   0.00  0.00

21  1643.82 1643.84   190772      0      313   0.380     370   0.00  0.00
22  1643.85 1643.84   190772      0      313   0.250     340   0.47  0.49
23  1643.83 1643.82   190630      0      258   0.130     250   0.00  0.00
24  1643.83 1643.96   191625      0      114   0.270     630   0.00  0.05
25  1644.02 1644.32   194252      0        5   0.050    1340   1.57  1.41

26  1644.44 1644.69   196960      0        5   0.028    1380   0.97  0.87
27  1644.85 1645.05   199607      0        5   0.034    1410   0.55  0.41
28  1645.20 1645.40   202242      0       99   0.300    1500   0.00  0.00
29  1645.49 1645.67   204275      0      161   0.220    1300   0.00  0.00
30  1645.76 1645.82   205404      0      259   0.370     900   0.00  0.00

TOTAL                             0     3511   5.827   22320   9.61  7.92
AVERAGE  1643.01                  0      117             744 NORMAL= 2.12

MAXIMUM  1645.82      205404   DATE=30    TOP CONSERVATION POOL   1642.00
MINIMUM  1640.23      166230   DATE= 1    TOP FLOOD POOL          1662.20

                      INFLOW VOLUME=    44271 AC-FT

AJUSTMENT TO LAKE ELEV 4/17/97 = +0.5 FT


REPORT IS SUBJECT TO CHANGE AND/OR REVISION