U.S. Bureau of Reclamation - Central Valley Operations Office
                                                                        Delta Outflow Computation (values in c.f.s.)

                                                                                August 2003
Estimated numbers are in bold print
                                         DELTA INFLOW                                           DELTA EXPORTS                               OUTFLOW INDEX         EXPORT/INFLOW
         Sacto R          Yolo + East Side        S. Joaquin Riv Total          Clifton         Contra Byron        Total    3-day
        @Freeport  SRTP    Misc   Streams          7-day Monthly Delta           Court   Tracy  Costa Bethany NBA   Delta     Avg     NDOI   7-day Monthly  Daily 3 Day 14 Day
  Date   prev dy prev wk prev dy  prev dy prev dy   Avg    Avg   Inflow   NDCU   (CLT)   (TRA)  (CCC) (BBID)       Exports TRA & CLT daily    Avg    Avg     (%)   (%)   (%)
08/01/03  25,642     231       0      723   1,360  1,404  1,397  27,956   4,200   6,662   4,074   252     67   103  11,024    9,872  12,732 12,604  12,732   38.2% 35.2% 37.5%
08/02/03  25,131     232       0      705   1,397  1,419  1,410  27,465   4,200   6,674   4,222   251     67   100  11,180   10,356  12,086 12,841  12,409   39.4% 37.1% 39.1%
08/03/03  24,870     234       0      729   1,423  1,438  1,467  27,256   4,150   6,014   4,279   241     50   104  10,588   10,641  12,518 12,988  12,445   37.6% 38.4% 40.0%
08/04/03  24,927     235       0      537   1,580  1,468  1,514  27,279   4,150   6,638   4,296   235     72   105  11,203   10,707  11,927 12,868  12,315   39.8% 38.9% 40.0%
08/05/03  25,251     237       0      648   1,655  1,486  1,529  27,791   4,100   6,658   4,256   226     63   100  11,178   10,714  12,513 12,768  12,355   39.0% 38.8% 39.7%
08/06/03  25,513     237       0      654   1,592  1,502  1,526  27,996   4,100   7,063   4,256   227     57    90  11,580   11,056  12,317 12,569  12,349   40.2% 39.7% 40.7%
08/07/03  25,216     238       0      718   1,507  1,511  1,511  27,679   4,050   7,114   4,270   229     70    98  11,641   11,205  11,988 12,297  12,297   40.9% 40.0% 41.0%
08/08/03  24,637     238       0      709   1,426  1,520  1,505  27,010   4,050   7,168   4,271   213     66    95  11,681   11,380  11,279 12,090  12,170   42.1% 41.1% 41.5%
08/09/03  23,234     238       0      703   1,456  1,523  1,498  25,631   4,000   7,061   4,249   216     60    98  11,563   11,377  10,068 11,801  11,936   43.9% 42.3% 41.5%
08/10/03  21,637     238       0      711   1,447  1,511  1,498  24,033   4,000   7,173   4,256   227     60    85  11,681   11,392   8,353 11,206  11,578   47.3% 44.3% 41.8%
08/11/03  20,350     239       0      725   1,492  1,492  1,500  22,806   3,950   7,157   4,251   227     16    89  11,708   11,382   7,148 10,524  11,175   50.0% 46.9% 42.3%
08/12/03  19,280     239       0      706   1,522  1,473  1,497  21,747   3,950   7,175   4,238   231     57    97  11,684   11,416   6,113  9,609  10,753   52.2% 49.7% 43.0%
08/13/03  17,983     239       0      685   1,463  1,454  1,487  20,370   3,900   7,032   4,271   235     64   102  11,575   11,374   4,895  8,549  10,303   55.2% 52.3% 43.7%
08/14/03  17,389     238       0      676   1,371  1,440  1,476  19,674   3,850   7,115   4,246   223     71   108  11,621   11,359   4,202  7,437   9,867   57.4% 54.8% 44.6%
08/15/03  17,152     237       0      677   1,330  1,413  1,462  19,396   3,850   6,993   4,340   228     60    93  11,594   11,332   3,952  6,390   9,473   58.1% 56.9% 45.6%
08/16/03  16,995     236       0      715   1,265  1,388  1,450  19,211   3,800   7,025   4,316   221     60    85  11,587   11,345   3,823  5,498   9,120   58.7% 58.1% 46.7%
08/17/03  16,828     234       0      747   1,273  1,372  1,446  19,082   3,800   6,953   4,353   232     40    83  11,582   11,327   3,701  4,833   8,801   59.0% 58.6% 47.9%
08/18/03  16,584     233       0      746   1,377  1,363  1,447  18,940   3,750   7,095   4,363   233     12    78  11,758   11,369   3,432  4,303   8,503   60.4% 59.4% 49.4%
08/19/03  16,599     232       0      720   1,461  1,348  1,442  19,012   3,700   7,175   4,337   231     51    74  11,765   11,426   3,548  3,936   8,242   60.3% 59.9% 51.0%
08/20/03  15,963     234       0      624   1,356  1,337  1,435  18,177   3,700   7,167   4,348   224     65    76  11,751   11,495   2,726  3,626   7,966   63.0% 61.2% 53.0%
08/21/03  16,273     237       0      540   1,300  1,330  1,427  18,350   3,650   7,169   4,387   216     64    73  11,782   11,528   2,918  3,443   7,726   62.6% 61.9% 54.7%
08/22/03  16,540     240       0      464   1,276  1,342  1,424  18,520   3,600   7,176   4,331   188     42    78  11,730   11,526   3,190  3,334   7,519   61.9% 62.5% 56.3%
08/23/03  18,053     243       0      417   1,348  1,365  1,424  20,061   1,774   7,155   4,367   185     40    81  11,746   11,528   6,540  3,722   7,477   57.2% 60.5% 57.5%
08/24/03  18,631     246       0      425   1,435  1,390  1,429  20,737   1,724   7,166   4,350   169     25    75  11,734   11,514   7,279  4,233   7,469   55.4% 58.1% 58.2%
08/25/03  18,570     249       0      443   1,554  1,411  1,436  20,816   1,674   7,179   4,371   177    119    75  11,683   11,529   7,459  4,809   7,468   54.9% 55.8% 58.6%
08/26/03  18,470     252       0      435   1,606  1,430  1,439  20,763   1,624   6,790   4,329   174     35    77  11,335   11,395   7,804  5,417   7,481   53.4% 54.6% 58.1%
08/27/03  18,194     252       0      400   1,492  1,445  1,437  20,338   1,624   7,103   4,375   172     32    81  11,698   11,382   7,016  6,029   7,464   56.3% 54.8% 58.0%
08/28/03  17,606     252       0      380   1,401  1,456  1,434  19,639   3,400   7,139   4,343   177     50    77  11,687   11,360   4,552  6,263   7,360   58.2% 55.9% 58.0%
08/29/03  17,369     252       0      412   1,355  1,463  1,433  19,388   3,350   7,114   4,312   181     43    74  11,638   11,462   4,400  6,436   7,258   58.7% 57.7% 58.6%
08/30/03  17,280     252       0      427   1,396  1,454  1,431  19,355   3,300   7,180   4,312   195     39    73  11,720   11,467   4,335  6,121   7,160   59.2% 58.7% 58.5%
08/31/03  16,594     252       0      439   1,375  1,436  1,431  18,660   3,250   6,833   4,345   196     40    73  11,406   11,365   4,004  5,653   7,059   59.7% 59.2% 58.1%

  Total  614,761   7,446       0   18,640  44,291 44,381 45,239 685,138 108,221 217,112 133,313 6,636  1,659 2,698 358,101  348,581 218,816 244,197298,228 1620.3%1593.61504.6%
Average   19,831     240       0      601   1,429  1,432  1,459  22,101   3,491   7,004   4,300   214     54    87  11,552   11,245   7,059  7,877           52.3% 51.4% 48.5%