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.
 Ramp up/down from Lewiston during the day.
Note: "Projected releases" (if present) are best guesses generated by Dreamflows.

 

April 2019
SunMonTueWedThuFriSat
  1300 cfs
all day
2300 cfs
all day
3300 cfs
all day
4300 cfs
all day
5300 cfs
all day
6300 cfs
all day
7300 cfs
all day
8300 cfs
all day
9300 cfs
all day
10300 cfs
all day
11300 cfs
 all day
12300 cfs
 all day
13300 cfs
 all day
14Ramping up
to 1,050 cfs
15Ramping up
to 4,200 cfs then
down to 3,900 cfs
16Ramping down
to 2,700 cfs
17Ramping up
to 9,850 cfs then
down to 9,100 cfs
18Ramping down
to 6,200 cfs
19Ramping down
to 4,100 cfs
20Ramping down
to 3,100 cfs then
up to 3,150 cfs
21Ramping down
to 2,450 cfs then
up to 2,800 cfs
22Ramping down
to 2,350 cfs then
up to 2,600 cfs
23Ramping down
to 2,150 cfs then
up to 2,400 cfs
24Ramping down
to 1,950 cfs then
up to 2,250 cfs
25Ramping down
to 1,850 cfs then
up to 2,150 cfs
26Ramping down
to 1,800 cfs then
up to 2,100 cfs
27Ramping down
to 1,750 cfs then
up to 2,050 cfs
28Ramping down
to 1,800 cfs then
up to 3,050 cfs
29Ramping up
to 10,900 cfs then
down to 10,300 cfs
30Ramping down
to 7,900 cfs
       

 

May 2019
SunMonTueWedThuFriSat
      1Ramping down
to 6,050 cfs
2Ramping down
to 4,700 cfs
3Ramping down
to 3,650 cfs
4Ramping down
to 3,400 cfs then
up to 3,700 cfs
5Ramping down
to 2,900 cfs then
up to 3,250 cfs
6Ramping down
to 2,750 cfs then
up to 3,150 cfs
7Ramping down
to 2,650 cfs then
up to 3,000 cfs
8Ramping down
to 2,550 cfs then
up to 2,950 cfs
9Ramping down
to 2,500 cfs then
up to 2,900 cfs
10Ramping down
to 2,450 cfs then
up to 2,850 cfs
11Ramping down
to 2,450 cfs then
up to 2,800 cfs
12Ramping down
to 2,400 cfs then
up to 2,750 cfs
13Ramping down
to 2,350 cfs then
up to 2,700 cfs
14Ramping down
to 2,300 cfs then
up to 2,650 cfs
15Ramping down
to 2,300 cfs then
up to 2,650 cfs
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