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.
 Ramp up/down from Lewiston during the day.
Note: All scheduled releases based on information provided by U.S. Bureau of Reclamation.

 

May 2023
SunMonTueWedThuFriSat
  1Ramping down
to 2,950 cfs then
up to 3,200 cfs
2Ramping down
to 2,750 cfs then
up to 3,000 cfs
3Ramping down
to 2,650 cfs then
up to 2,900 cfs
4Ramping down
to 2,550 cfs
5Ramping down
to 2,200 cfs then
up to 2,350 cfs
6Ramping down
to 2,000 cfs then
up to 2,200 cfs
7Ramping down
to 1,900 cfs then
up to 2,100 cfs
8Ramping down
to 1,900 cfs then
up to 2,050 cfs
9Ramping down
to 1,750 cfs then
up to 1,950 cfs
10Ramping down
to 1,750 cfs then
up to 1,900 cfs
11Ramping down
to 1,600 cfs then
up to 1,900 cfs
12Ramping down
to 1,700 cfs then
up to 1,800 cfs
13Ramping down
to 1,600 cfs then
up to 1,850 cfs
14Ramping down
to 1,650 cfs then
up to 1,800 cfs
15Ramping down
to 1,600 cfs then
up to 1,750 cfs
16Ramping down
to 1,550 cfs then
up to 1,700 cfs
17Ramping up
to 1,800 cfs then
down to 1,600 cfs
18Ramping up
to 1,700 cfs then
down to 1,500 cfs
19Ramping down
to 1,400 cfs then
up to 1,600 cfs
20Ramping down
to 1,400 cfs then
up to 1,500 cfs
21Ramping up
to 1,600 cfs then
down to 1,300 cfs
22Ramping up
to 1,500 cfs then
down to 1,300 cfs
23Ramping down
to 1,200 cfs then
up to 1,300 cfs
24Ramping down
to 1,100 cfs
25Ramping up
to 1,300 cfs then
down to 1,200 cfs
26Ramping up
to 1,350 cfs
27Ramping down
to 1,150 cfs then
up to 1,250 cfs
28Ramping up
to 1,350 cfs then
down to 1,050 cfs
29Ramping up
to 1,600 cfs
30Ramping up
to 1,900 cfs
31Ramping up
to 2,100 cfs then
down to 1,800 cfs
     

 

June 2023
SunMonTueWedThuFriSat
        1Ramping down
to 1,400 cfs
2Ramping down
to 1,200 cfs
3Ramping down
to 1,000 cfs
4Ramping down
to 700 cfs
5Ramping up
to 900 cfs then
down to 700 cfs
6Ramping up
to 900 cfs then
down to 600 cfs
7Ramping up
to 800 cfs then
down to 600 cfs
8Ramping up
to 800 cfs then
down to 600 cfs
9Ramping up
to 800 cfs then
down to 600 cfs
10Ramping up
to 800 cfs then
down to 600 cfs
11Ramping up
to 800 cfs then
down to 500 cfs
12Ramping up
to 700 cfs then
down to 500 cfs
13Ramping up
to 800 cfs then
down to 600 cfs
14Ramping up
to 800 cfs then
down to 500 cfs
15Ramping up
to 600 cfs then
down to 450 cfs
16Ramping up
to 600 cfs then
down to 450 cfs
17Ramping up
to 600 cfs then
down to 450 cfs
18Ramping up
to 600 cfs then
down to 450 cfs
19Ramping up
to 600 cfs then
down to 450 cfs
20Ramping up
to 550 cfs then
down to 450 cfs
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