Dreamflows Trinity - Lewiston Dam Release Schedule
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Releases From Lewiston Dam

In the table that follows, each date is color-coded according to the kind of release scheduled for that day:

 Scheduled release is not yet known.
 Ramp up/down from Lewiston during the day.
Note: All scheduled release information provided by U.S. Bureau of Reclamation.


June 2018
          1Ramping up
to 1,500 cfs then
down to 1,300 cfs
2Ramping up
to 1,450 cfs then
down to 1,150 cfs
3Ramping up
to 1,400 cfs then
down to 1,100 cfs
4Ramping down
to 1,000 cfs then
up to 1,100 cfs
5Ramping up
to 1,300 cfs then
down to 1,050 cfs
6Ramping down
to 900 cfs then
up to 1,350 cfs
7Ramping up
to 1,600 cfs then
down to 1,300 cfs
8Ramping up
to 1,350 cfs then
down to 1,100 cfs
9Ramping up
to 1,250 cfs then
down to 1,000 cfs
10Ramping up
to 1,200 cfs then
down to 900 cfs
11Ramping up
to 1,050 cfs then
down to 800 cfs
12Ramping up
to 1,000 cfs then
down to 750 cfs
13Ramping up
to 950 cfs then
down to 700 cfs
14Ramping up
to 900 cfs then
down to 650 cfs
15Ramping up
to 850 cfs then
down to 650 cfs
16Ramping up
to 800 cfs then
down to 600 cfs
17Ramping up
to 750 cfs then
down to 650 cfs
18Ramping up
to 700 cfs then
down to 600 cfs
19Ramping up
to 650 cfs then
down to 600 cfs
20Ramping up
to 650 cfs then
down to 550 cfs
21Ramping up
to 600 cfs then
down to 550 cfs
22Ramping up
to 600 cfs then
down to 500 cfs
23Ramping up
to 550 cfs then
down to 500 cfs
24Ramping up
to 550 cfs then
down to 450 cfs
25Ramping up
to 500 cfs then
down to 450 cfs
26Ramping up
to 500 cfs then
down to 450 cfs

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 not 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