U.S. Bureau of Reclamation - Central Valley Operations Office
Delta Outflow Computation (values in c.f.s.)

 MAY 1998
          Estimated numbers are in bold italic print
                                                DELTA INFLOW                                                            DELTA EXPORTS                                               OUTFLOW INDEX
           Sacto R              Yolo +  East Side      S. Joaquin River@Vernalis  Total              Clifton              Contra    Byron               Total   3-day                                   Export/
          @Freeport    SRTP      Misc    Streams            7-day      Monthly    Delta               Court     Tracy     Costa    Bethany     NBA      Delta      Avg       NDOI   7-day      Monthly  Inflow
   Date   -prev day--prev wk- -prev day--prev day--prev day- Average   Average    Inflow     NDCU   (CLT)     (TRA)     (CCC)     (BBID)               Exports  TRA & CLT   daily      Avg       Avg    (%)
 05/01/98    46,228       201       386     3,729    18,351    18,893    18,012    68,895     2,000         0     1,927       309        33        40     2,243     1,925    64,652    66,252    64,652   2.7%
 05/02/98    45,637       200       468     3,833    18,012    18,634    17,915    68,150     2,000       500     1,925       308        33        37     2,738     2,092    63,413    65,901    64,032   3.5%
 05/03/98    46,413       200       658     4,389    17,817    18,369    17,822    69,477       224         0     1,926       297        32        34     2,225     2,093    67,028    65,959    65,031   2.7%
 05/04/98    47,297       199       751     5,234    17,636    18,080    17,662    71,117        46         0     1,921       278        33        36     2,202     2,091    68,869    66,136    65,990   2.7%
 05/05/98    48,560       199       708     4,885    17,184    17,735    17,431    71,536      (182)        0     1,923       225        17        38     2,169     1,923    69,548    66,551    66,702   2.7%
 05/06/98    49,316       198       704     5,324    16,505    17,389    17,228    72,047    (1,323)        0     1,922       202         0        37     2,161     1,922    71,209    67,211    67,453   2.7%
 05/07/98    49,554       198       668     5,289    16,215    17,092    17,092    71,924    (2,414)      456     1,920       181         0        32     2,589     2,074    71,749    68,067    68,067   3.3%
 05/08/98    49,734       197       670     5,026    16,278    16,851    16,996    71,905      (589)      205     1,919       202         0        36     2,363     2,141    70,131    68,849    68,325   3.0%
 05/09/98    48,851       197       676     4,862    16,323    16,654    16,934    70,909      (310)        0     1,919       253         0        39     2,211     2,140    69,009    69,649    68,401   2.7%
 05/10/98    46,781       197       691     4,755    16,437    16,489    16,889    68,861       (82)        0     1,915       256         0        43     2,215     1,986    66,728    69,606    68,234   2.8%
 05/11/98    44,906       197       677     4,330    16,482    16,382    16,847    66,592     1,109       492     1,925       252         0        40     2,709     2,084    62,774    68,735    67,737   3.6%
 05/12/98    44,392       197       626     3,880    16,431    16,382    16,819    65,526     1,844       497     1,919       258         0        27     2,702     2,250    60,981    67,511    67,174   3.7%
 05/13/98    44,508       197       756     4,305    16,505    16,559    16,868    66,271      (667)      476     1,920       270         0        34     2,700     2,410    64,238    66,516    66,948   3.6%
 05/14/98    46,031       197       996     4,450    17,458    16,775    16,934    69,132    (1,530)      455     1,874       285         0        38     2,652     2,380    68,009    65,981    67,024   3.4%
 05/15/98    49,050       197       845     4,057    17,787    16,977    16,987    71,936    (1,530)      496     1,838       267         0        34     2,634     2,353    70,831    66,081    67,278   3.2%
 05/16/98    50,114       197       664     3,850    17,739    17,176    17,040    72,564    (1,480)      546     2,591       254         0        35     3,426     2,600    70,618    66,311    67,487   4.3%
 05/17/98    49,847       197       643     3,781    17,829    17,391    17,096    72,297      (973)      547     2,885       235         0        38     3,705     2,967    69,565    66,717    67,609   4.7%
 05/18/98    49,749       197       632     3,723    17,989    17,651    17,160    72,290     1,537       540     2,880       280         0        46     3,746     3,329    67,006    67,321    67,575   4.7%
 05/19/98    50,965       197       619     3,547    18,252    17,983    17,248    73,580     2,500       594     2,883       307        27        45     3,803     3,443    67,277    68,221    67,560   4.7%
 05/20/98    51,748       197       610     3,333    18,824    18,240    17,348    74,712     2,550       800     2,850       304        28        40     3,967     3,516    68,195    68,786    67,592   4.8%
 05/21/98    50,672       197       613     3,286    19,261    18,471    17,446    74,029     2,550       891     2,854       309        24        38     4,068     3,624    67,411    68,701    67,583   5.0%
 05/22/98    47,774       197       607     3,168    19,405    18,713    17,536    71,151     2,600     2,494     2,857       312        44        36     5,654     4,248    62,897    67,567    67,370   7.5%
 05/23/98    45,687       197       607     3,085    19,430    18,930    17,615    69,006     2,650     2,499     2,850       307        38        41     5,658     4,814    60,698    66,150    67,080   7.7%
 05/24/98    43,495       197       601     3,022    19,349    19,103    17,681    66,664     2,700     2,492     3,388       293         0        42     6,215     5,526    57,749    64,462    66,691   8.8%
 05/25/98    42,261       197       569     2,986    19,203    19,202    17,732    65,216     2,750     2,494     3,649       289         0        42     6,473     5,790    55,993    62,889    66,263   9.4%
 05/26/98    42,124       197       557     3,169    18,945    19,153    17,761    64,992     2,750     2,492     3,117       316        27        40     5,937     5,877    56,305    61,321    65,880   8.6%
 05/27/98    43,025       197       547     3,364    18,478    18,997    17,776    65,611     2,800     2,495     2,302       326        27        38     5,134     5,516    57,677    59,818    65,576   7.3%
 05/28/98    45,706       197       545     3,291    18,167    18,794    17,783    67,906     2,850     2,690     2,062       331        51        28     5,060     5,052    59,996    58,759    65,377   6.9%
 05/29/98    49,133       197     1,399     4,022    17,985    18,635    17,802    72,736    (1,208)    1,096     2,040       315        29        23     3,445     4,228    70,499    59,845    65,554   4.3%
 05/30/98    52,241       197     3,705     5,451    18,319    18,493    17,820    79,913    (1,158)    1,098     2,009       313        30        27     3,417     3,665    77,654    62,267    65,957   3.9%
 05/31/98    57,016       197     3,361     4,556    18,356    18,356    17,834    83,486    (1,108)      858     2,011       298         0        26     3,193     3,037    81,401    65,646    66,455   3.4%

  Total   1,478,815     6,123    26,559   125,982   552,952   554,550   539,112 2,190,431    20,906    28,202    71,920     8,634       472     1,132   109,416    99,097 2,060,109 2,043,787 2,070,657 142.4%
 Average     47,704       198       857     4,064    17,837    17,889    17,391    70,659       674       910     2,320       279        15        37     3,530     3,197    66,455    65,929    66,795   4.6%