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:

ColorMeaning
 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 information provided by U.S. Bureau of Reclamation.

 

May 2016
SunMonTueWedThuFriSat
1Ramping down
to 2,000 cfs then
up to 3,200 cfs
2Ramping down
to 2,500 cfs
3Ramping up
to 4,000 cfs
4Ramping down
to 3,000 cfs
5Ramping up
to 4,000 cfs
6Ramping up
to 4,400 cfs then
down
to 3,600 cfs
7Ramping up
to 4,500 cfs
8Ramping up
to 6,500 cfs then
down to 6,000 cfs
9Ramping up
to 10,000 cfs
10Ramping down
to 8,500 cfs
11Ramping down
to 6,500 cfs
12Ramping down
to 5,200 cfs then
up to 5,600 cfs
13Ramping up
to 10,000 cfs
14Ramping down
to 8,500 cfs
15Ramping down
to 6,500 cfs
16Ramping down
to 4,800 cfs
17Ramping down
to 4,200 cfs
184,200 cfs
 all day
19Change to
 4,400 cfs at 4pm
20Change to
 4,000 cfs at 6am
214,000 cfs
 all day
22Change to
 3,800 cfs at 6am
23Change to
 4,200 cfs at 4pm
24Ramping down
to 3,600 cfs
25Change to
 3,400 cfs at 6am
26Ramping up
to 3,800 cfs then
down to 3,600 cfs
273,400 cfs
 all day
28Change to
 3,200 cfs at 4pm
29Change to
 3,500 cfs at 4pm
303,500 cfs
 all day
31Ramping down
to 3,300 cfs then
up to 3,400 cfs
       

 

June 2016
SunMonTueWedThuFriSat
      1Ramping down
to 3,000 cfs
2Change to
 3,100 cfs at 6pm
3
 
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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 not scheduled to be held this year (they are held only in odd-numbered years, typically late August).

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