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.
 Scheduled release: 450 cfs below Lewiston Dam all day.
 Scheduled release: 500 cfs or more 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.


August 2017
    1700 cfs
 all day
2700 cfs
 all day
3700 cfs
 all day
4700 cfs
 all day
5Change to
 600 cfs at noon
6600 cfs
 all day
7Change to
 500 cfs at 6pm
8Ramping up
to 600 cfs then
down to 500 cfs
9500 cfs
 all day
10Change to
 450 cfs at 4pm
11450 cfs
 all day
12450 cfs
 all day
13450 cfs
 all day
14450 cfs
 all day
15450 cfs
 all day
16450 cfs
 all day
17450 cfs
 all day
18450 cfs
 all day
19450 cfs
 all day
20Ramping up
to 1,050 cfs
21Ramping up
to 2,650 cfs then
down to 2,450 cfs
22Ramping down
to 1,550 cfs
23Ramping down
to 950 cfs
24Ramping down
to 450 cfs

Water Management Issues:

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

2.  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

3.  The Hoopa Valley Tribe's Boat Dance Ceremony is being held this year (they are held in odd-numbered years).  See the above calendar for an outline, and this bulletin board post for detailed ramping information.

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