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: 500 cfs or more below Lewiston Dam all day.
 Ramp up/down from Lewiston during the day.
Note: All scheduled releases based on information provided by U.S. Bureau of Reclamation.

 

March 2025
SunMonTueWedThuFriSat
            13,500 cfs
 all day
23,500 cfs
 all day
33,500 cfs
 all day
43,500 cfs
 all day
53,500 cfs
 all day
63,500 cfs
 all day
73,500 cfs
 all day
83,500 cfs
 all day
93,500 cfs
 all day
103,500 cfs
 all day
113,500 cfs
 all day
123,500 cfs
 all day
13Ramping down
to 2,900 cfs
14Ramping down
to 2,300 cfs
15Ramping down
to 2,000 cfs
162,000 cfs
 all day
172,000 cfs
 all day
182,000 cfs
 all day
192,000 cfs
 all day
202,000 cfs
 all day
21Ramping up
to 2,400 cfs then
down to 2,100 cfs
22Ramping down
to 1,600 cfs
231,600 cfs
 all day
24Ramping down
to 1,500 cfs
251,500 cfs
 all day
26Ramping up
to 1,750 cfs then
down to 1,700 cfs
27Ramping down
to 1,500 cfs
28Ramping down
to 1,400 cfs
291,400 cfs
 all day
30Ramping up
to 3,000 cfs then
down to 2,600 cfs
31Ramping down
to 2,100 cfs
         

 

April 2025
SunMonTueWedThuFriSat
    1Ramping down
to 1,750 cfs
21,750 cfs
 all day
3Ramping down
to 1,550 cfs
41,550 cfs
 all day
51,500 cfs
 all day
6Ramping down
to 1,350 cfs
71,350 cfs
 all day
8Ramping up
to 4,000 cfs then
down to 3,600 cfs
9Ramping down
to 2,400 cfs
102,400 cfs
 all day
11Ramping down
to 2,100 cfs
122,100 cfs
 all day
13Change to
 2,000 cfs at 2am
142,000 cfs
 all day
15Ramping up
to 4,350 cfs
16
 
17
 
18
 
19
 
20
 
21
 
22
 
23
 
24
 
25
 
26
 
27
 
28
 
29
 
30
 
     

Water Management Issues:

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

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

3.  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