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: "Projected releases" (if present) are best guesses generated by Dreamflows.

 

July 2019
SunMonTueWedThuFriSat
  1Change to
 2,000 cfs at 2pm
2Ramping down
to 1,900 cfs
3Ramping down
to 1,800 cfs
4Ramping down
to 1,700 cfs
5Ramping down
to 1,600 cfs
6Ramping down
to 1,500 cfs
7Ramping down
to 1,400 cfs
8Ramping down
to 1,300 cfs
9Ramping down
to 1,200 cfs
10Change to
 1,150 cfs at noon
11Change to
 1,100 cfs at noon
12Change to
 1,050 cfs at noon
13Change to
 1,000 cfs at noon
14Change to
 950 cfs at noon
15950 cfs
 all day
16Change to
 900 cfs at noon
17900 cfs
 all day
18Change to
 850 cfs at noon
19850 cfs
 all day
20Change to
 800 cfs at noon
21800 cfs
 all day
22Change to
 750 cfs at noon
23750 cfs
 all day
24750 cfs
 all day
25Change to
 700 cfs at noon
26700 cfs
 all day
27700 cfs
 all day
28Change to
 650 cfs at noon
29650 cfs
 all day
30Change to
 600 cfs at noon
31600 cfs
 all day
     

 

August 2019
SunMonTueWedThuFriSat
        1Change to
 550 cfs at noon
2550 cfs
 all day
3Change to
 500 cfs at noon
4500 cfs
 all day
5500 cfs
 all day
6Change to
 450 cfs at noon
7
 
8
 
9
 
10
 
11
 
12
 
13
 
14
 
15
 
16
 
17
 
18
 
19
 
20
 
21
 
22
 
23
 
24
 
25
 
26
 
27
 
28
 
29
 
30
 
31
 

Water Management Issues:

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

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

3.  The Hoopa Valley Tribe's Boat Dance Ceremony will be held this year (they are held in odd-numbered years, typically late August).

4.  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