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: less than 450 cfs below Lewiston Dam all day.
 Ramp up/down from Lewiston during the day.
Note: All scheduled release information provided by U.S. Bureau of Reclamation.


April 2018
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
14300 cfs
all day
15300 cfs
all day
16Change to
 400 cfs at 10pm
17Ramping up
to 1,800 cfs then
down to 1,650 cfs
18Ramping down
to 1,300 cfs
19Ramping down
to 700 cfs
20Change to
 650 cfs at 10pm
21Ramping down
to 500 cfs
22Ramping down
to 300 cfs
23Ramping up
to 450 cfs then
down to 350 cfs
24Ramping up
to 500 cfs
25Ramping up
to 600 cfs then
down to 550 cfs
26Ramping up
to 750 cfs then
down to 700 cfs
27Ramping up
to 950 cfs then
down to 800 cfs
28Ramping down
to 700 cfs then
up to 1,650 cfs
29Ramping down
to 1,300 cfs
30Ramping down
to 750 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