04/23/10
                                                                U.S. Bureau of Reclamation - Central Valley Operations Office
                                                                        Delta Outflow Computation (values in c.f.s.)

                                                                                April 2010
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     (%)     (%)    (%)
04/01/10 12,802    220     240      987    2,006   2,112  1,910  16,255   -304    687     796     0      0     10   1,492    4,588   15,067  9,287  15,067   9.1%   28.7%  25.8%
04/02/10 13,305    221     242      981    1,910   2,082  1,981  16,659   -304    699     807     0     63     8    1,452    2,990   15,511 10,283  15,289   8.7%   18.4%  17.0%
04/03/10 13,593    223     232      870    2,052   2,167  2,250  16,970  -2,586   692     826     0     25     8    1,500    1,502   18,056 11,626  16,211   8.8%   8.9%   8.6%
04/04/10 13,490    224     297      880    2,789   2,311  2,483  17,680  -2,536   683     826     0     25     9    1,493    1,511   18,724 13,150  16,839   8.4%   8.6%   8.6%
04/05/10 12,763    226     324      866    3,181   2,512  2,698  17,360  -5,275   654     827     0     48     12   1,446    1,503   21,188 14,947  17,709   8.3%   8.5%   8.7%
04/06/10 14,459    227     586     1,343   3,556   2,745  2,868  20,171  -3,677   694     823     0     42     11   1,485    1,503   22,363 17,009  18,485   7.3%   8.0%   8.6%
04/07/10 14,660    229     388     1,176   3,718   3,001  3,001  20,171  -3,677   699     822     0     24     12   1,509    1,507   22,338 19,035  19,035   7.4%   7.6%   8.5%
04/08/10 14,751    230     323      957    3,803   3,280  3,109  20,064  -1,345   696     823     0     31     18   1,506    1,519   19,903 19,726  19,144   7.4%   7.4%   8.5%
04/09/10 14,468    230     295      938    3,861   3,527  3,183  19,792  -1,345   697     824     0     45     25   1,501    1,521   19,636 20,315  19,198   7.5%   7.4%   8.5%
04/10/10 13,786    230     274      920    3,781   3,660  3,237  18,991  1,850    691     824     0     54     23   1,484    1,518   15,657 19,973  18,844   7.7%   7.5%   8.3%
04/11/10 12,467    230     259      935    3,723   3,727  3,275  17,614  1,850    696     822     0     50     23   1,490    1,518   14,274 19,337  18,429   8.3%   7.8%   8.2%
04/12/10 12,702    230     298     1,006   3,650   3,773  3,325  17,886    24     890     649     0      0     22   1,560    1,524   16,301 18,639  18,251   8.6%   8.2%   8.3%
04/13/10 13,598    230    1,442    1,305   3,874   3,804  3,372  20,449   -839    893     618     0     38     27   1,500    1,522   19,788 18,271  18,370   7.2%   8.0%   8.2%
04/14/10 15,409    230    2,199    1,614   3,934   3,882  3,442  23,386   -839    898     623     0     37     22   1,506    1,524   22,719 18,325  18,680   6.3%   7.3%   8.0%
04/15/10 20,909    230    3,029    1,326   4,352   3,969  3,510  29,846   -839    690     833     0      0     26   1,549    1,518   29,135 19,644  19,377   5.1%   6.1%   7.5%
04/16/10 26,513    230    3,277    1,211   4,468   4,077  3,574  35,699   -839    689     826     0     38     27   1,504    1,520   35,033 21,844  20,356   4.1%   5.0%   7.1%
04/17/10 26,603    230    3,090    1,125   4,538   4,214  3,640  35,586   987     694     827     0     50     36   1,507    1,520   33,092 24,335  21,105   4.1%   4.4%   6.6%
04/18/10 25,024    230    2,960    1,098   4,682   4,382  3,706  33,994  1,900    699     827     0     50     39   1,516    1,521   30,578 26,664  21,631   4.3%   4.2%   6.2%
04/19/10 23,389    230    2,898    1,105   4,827   4,524  3,767  32,449  1,900    724     829     0     67     31   1,517    1,533   29,032 28,482  22,021   4.6%   4.3%   6.0%
04/20/10 21,564    230    2,914    1,143   4,866   4,678  3,829  30,717  1,900    657     830     0     38     35   1,484    1,522   27,333 29,560  22,286   4.7%   4.5%   5.8%
04/21/10 20,372    230    2,262    1,464   5,013   4,822  3,902  29,341  -1,523   698     829     0     59     31   1,499    1,522   29,365 30,510  22,623   5.0%   4.8%   5.6%
04/22/10 20,741    230     363    1,851    5,359  4,952  3,969  28,544  (3,349)   699     853     0     38    27    1,541   1,522   30,352  30,684 22,975    5.3%   5.0%   5.5%
04/23/10 23,068    230     305    1,744    5,378  5,073  4,030  30,725  (3,349)   691     862     0     38    29    1,544   1,544   32,530  30,326 23,390    4.9%   5.1%   5.4%
04/24/10 25,568    230     277    1,488    5,383  5,172  4,086  32,946  (3,299)   693     862     0     0     39    1,594   1,553   34,651  30,549 23,859    4.7%   5.0%   5.4%
04/25/10 24,586    230     259    1,371    5,377  5,282  4,147  31,823  (3,299)   693     862     0     54    33    1,535   1,554   33,587  30,979 24,249    4.7%   4.8%   5.2%
04/26/10 22,101    230     246    1,379    5,595  5,391  4,204  29,551    124     695     862     0     74    32    1,515   1,555   27,912  30,819 24,389    5.0%   4.8%   5.0%
04/27/10 20,422    230     240    1,499    5,635  5,468  4,254  28,026   1,950    692     854     0     53    31    1,524   1,553   24,552  30,421 24,395    5.3%   5.0%   4.8%
04/28/10 19,397    230     240    1,602    5,551  5,471  4,294  27,020   2,000    695     831     0     59    29    1,496   1,543   23,524  29,587 24,364    5.4%   5.3%   4.8%
04/29/10 20,122    230     261    2,563    5,378  5,459  4,329  28,554   1,087    691     831     0     52    22    1,492   1,531   25,975  28,962 24,420    5.1%   5.3%   4.8%
04/30/10 21,335    230     255    2,764    5,295  5,416  4,354  29,879   1,087    694     831     0     73    43    1,495   1,524   27,297  28,214 24,516    4.9%   5.1%   4.8%


  Total  553,967   6,860  30,275   39,511 127,535 120,933103,727758,148 (22,563) 21,363  24,361     0  1,226   740  45,237   50,287 735,474 681,503615,510   188.5% 221.0% 234.2%
Average   18,466     229   1,009    1,317   4,251  4,031  3,458  25,272    (752)    712     812     0     41    25   1,508    1,676  24,516 22,717  20,517     6.3%   7.4%   7.8%