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: less than 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 scheduled release information provided by U.S. Bureau of Reclamation.

 

April 2017
SunMonTueWedThuFriSat
            1300 cfs
 all day
2300 cfs
 all day
3300 cfs
 all day
4300 cfs
 all day
5Ramping up
to 1,500 cfs
61,500 cfs
 all day
71,500 cfs
 all day
81,500 cfs
 all day
91,500 cfs
 all day
101,500 cfs
 all day
111,500 cfs
 all day
121,500 cfs
 all day
131,500 cfs
 all day
141,500 cfs
 all day
151,500 cfs
 all day
161,500 cfs
 all day
171,500 cfs
 all day
181,500 cfs
 all day
19Ramping down
to 1,100 cfs
20Ramping down
to 500 cfs
21400 cfs
 all day
22Ramping up
to 1,200 cfs
23Ramping up
to 2,500 cfs
24Ramping up
to 4,000 cfs
25Ramping up
to 7,000 cfs
26Ramping up
to 11,000 cfs
2711,000 cfs
 all day
2811,000 cfs
 all day
29Ramping down
to 9,000 cfs
30Ramping down
to 7,000 cfs
           

 

May 2017
SunMonTueWedThuFriSat
  1Ramping down
to 5,200 cfs
2Ramping down
to 3,800 cfs
3Ramping down
to 2,800 cfs
4Change to
 2,700 cfs at noon
52,500 cfs
 all day
6Ramping down
to 2,100 cfs
7Ramping down
to 2,000 cfs then
up to 2,100 cfs
8
 
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Water Management Issues:

1.  Detailed scheduled release information for the next few days is shown on this graph.

2.  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

3.  The Hoopa Valley Tribe's Boat Dance Ceremony is not scheduled to be held this year (they are held only in odd-numbered years, typically late August).

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