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:

 Scheduled release is not yet known.
 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.


May 2017
  1Ramping down
to 5,200 cfs
2Ramping down
to 3,800 cfs
3Ramping down
to 2,800 cfs
4Change to
 2,700 cfs at noon
52,500 cfs
 all day
6Ramping down
to 2,100 cfs
7Ramping down
to 2,000 cfs then
up to 2,100 cfs
8Change to
 2,400 cfs at 4pm
92,400 cfs
 all day
10Ramping up
to 5,400 cfs
115,400 cfs
 all day
125,400 cfs
 all day
135,400 cfs
 all day
145,400 cfs
 all day
15Change to
 5,200 cfs at 8am
16Change to
 5,000 cfs at noon
175,000 cfs
 all day
18Change to
 4,800 cfs at 2pm
19Change to
 4,700 cfs at 2pm
20Change to
 4,600 cfs at 8am
21Change to
 4,400 cfs at 2pm
22Change to
 4,300 cfs at 6pm
23Change to
 4,100 cfs at noon
24Change to
 4,500 cfs at 8am
25Ramping down
to 4,000 cfs
26Change to
 4,500 cfs at 6am
27Ramping down
to 3,900 cfs
284,400 cfs
 all day
29Change to
 4,000 cfs at noon
30Change to
 4,500 cfs at 8am
31Change to
 4,200 cfs at 6am


June 2017
        1Change to
 4,100 cfs at 2pm
2Change to
 4,000 cfs at noon
3Change to
 3,900 cfs at noon
4Change to
 3,800 cfs at 10am
5Change to
 3,700 cfs at noon
6Change to
 3,600 cfs at noon
7Change to
 3,500 cfs at 2pm
8Change to
 3,400 cfs at 4pm
9Change to
 3,300 cfs at 10pm
103,300 cfs
 all day
11Change to
 3,200 cfs at 6am
12Change to
 3,100 cfs at noon
13Change to
 3,000 cfs at noon
14Change to
 2,900 cfs at 4pm
15Change to
 2,800 cfs at 6pm
16Change to
 2,700 cfs at 8pm
172,700 cfs
 all day
18Change to
 2,600 cfs at noon
19Change to
 2,500 cfs at 2pm
20Change to
 2,400 cfs at 10pm
212,400 cfs
 all day
22Change to
 2,300 cfs at noon
23Change to
 2,200 cfs at 4pm
242,200 cfs
 all day
25Change to
 2,100 cfs at noon
26Change to
 2,000 cfs at 2pm
272,000 cfs
 all day
282,000 cfs
 all day
292,000 cfs
 all day
302,000 cfs
 all day


July 2017
            12,000 cfs
 all day
2Change to
 1,900 cfs at noon
31,900 cfs
 all day
4Ramping down
to 1,700 cfs
5Ramping up
to 1,800 cfs then
down to 1,700 cfs
6Change to
 1,600 cfs at 2pm
71,600 cfs
 all day
8Change to
 1,500 cfs at noon
91,500 cfs
 all day
10Change to
 1,400 cfs at noon
11Change to
 1,300 cfs at 4pm
121,300 cfs
 all day
13Change to
 1,300 cfs at 8am
14Ramping down
to 1,200 cfs
15Ramping down
to 1,100 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 scheduled to be held this year (they are held in odd-numbered years, typically late August).

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