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


September 2019
1Ramping up
to 1,300 cfs
2Ramping up
to 2,650 cfs then
down to 2,250 cfs
3Ramping down
to 1,450 cfs
4Ramping down
to 850 cfs
5Ramping down
to 450 cfs
6450 cfs
 all day
7450 cfs
 all day
8450 cfs
 all day
9450 cfs
 all day
10450 cfs
 all day
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
18Ramping up
to 550 cfs
19Ramping down
to 450 cfs then
up to 550 cfs
20Ramping 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 (which is held in odd-numbered years) will go from Sep 1 through Sep 5, 2019.

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