Dreamflows Trinity - Lewiston Dam Release Schedule
 
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Releases From Lewiston Dam

In the tables that follow, each date is color-coded according to the kind of release scheduled for that day:

ColorMeaning
  Scheduled release is not yet known. 
  Scheduled release: 300 cfs below Lewiston Dam all day. 
  Scheduled release: 450 cfs below Lewiston Dam all day. 
  Scheduled release: 500 cfs or more below Lewiston Dam all day. 
  Ramp up/down from Lewiston during the day. 
Note: All information provided by U.S. Bureau of Reclamation.

 

August 2015
SunMonTueWedThuFriSat
             1   450 cfs
 all day 
 2   450 cfs
 all day 
 3   450 cfs
 all day 
 4   450 cfs
 all day 
 5   450 cfs
 all day 
 6   450 cfs
 all day 
 7   450 cfs
 all day 
 8   450 cfs
 all day 
 9   450 cfs
 all day 
 10   450 cfs
 all day 
 11   450 cfs
 all day 
 12   450 cfs
 all day 
 13   450 cfs
 all day 
 14   450 cfs
 all day 
 15   450 cfs
 all day 
 16   Ramping up
to 1,500 cfs 
 17   Ramping up/down
to 2,450 cfs 
 18   Ramping down
to 1,600 cfs 
 19   Ramping down
to 1,000 cfs 
 20   Ramping down
to 450 cfs 
 21   Ramping up
to 1,150 cfs, see note 3 
 22   1,150 cfs
 all day, see note 3 
 23
 
 24
 
 25
 
 26
 
 27
 
 28
 
 29
 
 30
 
 31
 
         

 

September 2015
SunMonTueWedThuFriSat
     1   1,150 cfs
 all day, see note 3 
 2   1,150 cfs
 all day, see note 3 
 3   1,150 cfs
 all day, see note 3 
 4   1,150 cfs
 all day, see note 3 
 5   1,150 cfs
 all day, see note 3 
 6   1,150 cfs
 all day, see note 3 
 7   1,150 cfs
 all day, see note 3 
 8   1,150 cfs
 all day, see note 3 
 9   1,150 cfs
 all day, see note 3 
 10   1,150 cfs
 all day, see note 3 
 11   1,150 cfs
 all day, see note 3 
 12   1,150 cfs
 all day, see note 3 
 13   1,150 cfs
 all day, see note 3 
 14   1,150 cfs
 all day, see note 3 
 15   1,150 cfs
 all day, see note 3 
 16   1,150 cfs
 all day, see note 3 
 17   1,150 cfs
 all day, see note 3 
 18   1,150 cfs
 all day, see note 3 
 19   1,150 cfs
 all day, see note 3 
 20   1,150 cfs
 all day, see note 3 
 21   1,150 cfs
 all day, see note 3 
 22   1,150 cfs
 all day, see note 3 
 23   1,150 cfs
 all day, see note 3 
 24   1,150 cfs
 all day, see note 3 
 25   1,150 cfs
 all day, see note 3 
 26   Ramping down
to 450 cfs, see note 3 
 27   Ramping down
to 450 cfs, see note 3 
 28   Ramping down
to 450 cfs, see note 3 
 29   Ramping down
to 450 cfs, see note 3 
 30   Ramping down
to 450 cfs, see note 3 
     

 

October 2015
SunMonTueWedThuFriSat
         1   450 cfs
 all day 
 2   450 cfs
 all day 
 3   450 cfs
 all day 
 4   450 cfs
 all day 
 5   450 cfs
 all day 
 6   450 cfs
 all day 
 7   450 cfs
 all day 
 8   450 cfs
 all day 
 9   450 cfs
 all day 
 10   450 cfs
 all day 
 11   450 cfs
 all day 
 12   450 cfs
 all day 
 13   450 cfs
 all day 
 14   450 cfs
 all day 
 15   Change to
 400 cfs at 2am 
 16   Change to
 350 cfs at 2am 
 17   Change to
 300 cfs at 2am 
 18   300 cfs
 all day 
 19   300 cfs
 all day 
 20   300 cfs
 all day 
 21   300 cfs
 all day 
 22   300 cfs
 all day 
 23   300 cfs
 all day 
 24   300 cfs
 all day 
 25   300 cfs
 all day 
 26   300 cfs
 all day 
 27   300 cfs
 all day 
 28   300 cfs
 all day 
 29   300 cfs
 all day 
 30   300 cfs
 all day 
 31   300 cfs
 all day 

Water Management Issues:

1.  Times reflect releases from Lewiston Dam, and it is assumed that it takes approximately 12 hours for the water to get to Pigeon Point and 20 hours to get to Cedar Flat.  This is a good rule of thumb, though the actual flow travel time is flow dependent (the higher the flow, the less time it takes).  Here are some approximate observed numbers:
  Lewiston Release    Time to Pigeon Point    Time to Cedar Flat 
500 cfs13 hours24 hours
1000 cfs12 hours20 hours
1500 cfs10 hours14 hours
3000 cfs9 hours13 hours

2.  The release for the Hoopa Valley Tribe's Boat Dance Ceremony (which is held in odd-numbered years) will go from Aug 16 through Aug 20, 2015.  For detailed ramping information, see this bulletin board post.

3.  See this announcement.  Supplemental flows from Lewiston Dam commenced on August 21, initially at 1,150 cfs.  The above schedule reflects the scenario where flows stay at 1,150 cfs until Sept 25, but be aware that releases could end sooner, or extend later, or the amount of water released could vary considerably between now and the end of the release.

4.  The above schedule is based on information provided by the U.S. Bureau of Reclamation.