Dreamflows Trinity - Lewiston Dam Release Schedule
"I can't boat everyday, but I can always Dream"
Home River Flows Bulletin Board Custom Email Reports Alerts Signup Login Help Search

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: less than 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: "Projected releases" (if present) are best guesses generated by Dreamflows.


April 2019
  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
14Ramping up
to 1,050 cfs
15Ramping up
to 4,200 cfs then
down to 3,900 cfs
16Ramping down
to 2,700 cfs
17Ramping up
to 9,850 cfs then
down to 9,100 cfs
18Ramping down
to 6,200 cfs
19Ramping down
to 4,100 cfs
20Ramping down
to 3,100 cfs then
up to 3,150 cfs
21Ramping down
to 2,450 cfs then
up to 2,800 cfs
22Ramping down
to 2,350 cfs then
up to 2,600 cfs
23Ramping down
to 2,150 cfs then
up to 2,400 cfs
24Ramping down
to 1,950 cfs then
up to 2,250 cfs
25Ramping down
to 1,850 cfs then
up to 2,150 cfs
26Ramping down
to 1,800 cfs then
up to 2,100 cfs
27Ramping down
to 1,750 cfs then
up to 2,050 cfs
28Ramping down
to 1,800 cfs then
up to 3,050 cfs
29Ramping up
to 10,900 cfs then
down to 10,300 cfs
30Ramping down
to 7,000 cfs


May 2019
      1Ramping down
to 3,500 cfs
23,500 cfs
 all day
33,500 cfs
 all day
4Ramping down
to 3,250 cfs
5Ramping down
to 3,050 cfs
6Ramping down
to 2,850 cfs
7Ramping down
to 2,750 cfs
8Change to
 2,700 cfs at 10pm
9Change to
 2,650 cfs at 8pm
10Change to
 2,600 cfs at noon
11Change to
 2,550 cfs at 8am
122,550 cfs
 all day
132,500 cfs
 all day
142,500 cfs
 all day
15Ramping up
to 2,850 cfs
16Ramping up
to 3,450 cfs
17Ramping down
to 2,900 cfs then
up to 3,300 cfs
18Ramping up
to 6,650 cfs
19Ramping up
to 9,000 cfs then
down to 6,900 cfs
20Ramping down
to 4,350 cfs
21Ramping down
to 3,000 cfs
22Ramping up
to 3,050 cfs then
down to 2,700 cfs
23Ramping up
to 2,900 cfs then
down to 2,650 cfs
24Ramping down
to 2,450 cfs then
up to 4,100 cfs
25Ramping down
to 3,000 cfs
26Ramping down
to 2,400 cfs
27Ramping up
to 2,650 cfs then
down to 2,450 cfs
28Ramping up
to 2,600 cfs then
down to 2,400 cfs
29Ramping up
to 2,550 cfs then
down to 2,350 cfs
30Ramping down
to 2,200 cfs then
up to 2,450 cfs
31Ramping down
to 2,150 cfs then
up to 2,450 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 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