Dreamflows Trinity - Lewiston Dam Release Schedule

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:

Color	Meaning
	Scheduled release is not yet known.
	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: All scheduled releases based on information provided by U.S. Bureau of Reclamation.

March 2026
Sun	Mon	Tue	Wed	Thu	Fri	Sat
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	14300 cfs all day
15300 cfs all day	16300 cfs all day	17300 cfs all day	18300 cfs all day	19Ramping up to 400 cfs	20Ramping up to 1,200 cfs then down to 900 cfs	21Ramping down to 550 cfs
22Change to 500 cfs at 8pm	23Ramping down to 400 cfs	24Ramping down to 350 cfs	25Ramping down to 300 cfs	26300 cfs all day	27300 cfs all day	28Ramping up to 550 cfs
29Ramping up to 1,700 cfs then down to 1,450 cfs	30Ramping down to 850 cfs	31Ramping down to 750 cfs

April 2026
Sun	Mon	Tue	Wed	Thu	Fri	Sat
			1Ramping down to 650 cfs	2Ramping down to 550 cfs	3Ramping down to 450 cfs	4Ramping down to 400 cfs
5Change to 350 cfs at 2am	6Change to 400 cfs at 10pm	7Ramping up to 1,550 cfs then down to 1,300 cfs	8Ramping down to 900 cfs	9Ramping down to 850 cfs then up to 900 cfs	10Ramping down to 850 cfs	11Ramping down to 800 cfs
12Ramping up to 850 cfs then down to 800 cfs	13Ramping up to 900 cfs	14Ramping up to 1,200 cfs then down to 1,100 cfs	15Ramping up to 1,900 cfs then down to 1,500 cfs	16Ramping down to 950 cfs	17Ramping up to 1,400 cfs then down to 1,000 cfs	18Ramping down to 800 cfs then up to 900 cfs
19Ramping up to 1,050 cfs then down to 1,000 cfs	20Ramping down to 800 cfs	21Ramping down to 700 cfs then up to 1,000 cfs	22Ramping up to 2,200 cfs	23Ramping up to 3,500 cfs	24Ramping up to 4,300 cfs then down to 3,300 cfs	25Ramping down to 2,500 cfs
26Ramping down to 1,700 cfs	27Ramping down to 1,550 cfs	281,600 cfs all day	29Ramping up to 1,850 cfs then down to 1,800 cfs	30Ramping down to 1,700 cfs

May 2026
Sun	Mon	Tue	Wed	Thu	Fri	Sat
					1Ramping down to 1,600 cfs	2Change to 1,550 cfs at 8am
3Change to 1,500 cfs at 2am	4Change to 1,450 cfs at 2am	5Change to 1,400 cfs at 2am	6Change to 1,350 cfs at 2am	7Change to 1,300 cfs at 2am	8Change to 1,250 cfs at 2am	91,250 cfs all day
10Change to 1,200 cfs at 2am	111,200 cfs all day	12Change to 1,150 cfs at 2am	131,150 cfs all day	14Change to 1,100 cfs at 2am	15Change to 1,050 cfs at 2am	16Change to 1,000 cfs at 2am
171,000 cfs all day	181,000 cfs all day	191,000 cfs all day	20Change to 950 cfs at 2am	21950 cfs all day	22950 cfs all day	23950 cfs all day
24Change to 900 cfs at 2am	25900 cfs all day	26900 cfs all day	27900 cfs all day	28900 cfs all day	29900 cfs all day	30Change to 850 cfs at 2am
31850 cfs all day

June 2026
Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1850 cfs all day	2850 cfs all day	3850 cfs all day	4Change to 800 cfs at 2am	5800 cfs all day	6800 cfs all day
7800 cfs all day	8800 cfs all day	9Change to 750 cfs at 2am	10750 cfs all day	11750 cfs all day	12750 cfs all day	13Ramping up to 1,000 cfs
14Ramping up to 1,450 cfs	15Ramping down to 1,350 cfs	16Ramping down to 1,150 cfs	17Ramping down to 1,000 cfs	18Ramping down to 850 cfs	19Change to 800 cfs at 8am	20Change to 750 cfs at 2am
21Change to 700 cfs at 2am	22Change to 650 cfs at 2am	23650 cfs all day	24Change to 600 cfs at 2am	25600 cfs all day	26Change to 550 cfs at 2am	27550 cfs all day
28550 cfs all day	29Change to 500 cfs at 2am	30500 cfs all day

Water Management Issues:

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

2. The Hoopa Valley Tribe's Boat Dance Ceremony will not be held this year (they are held only in odd-numbered years, typically late August).

3. 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 cfs	13 hours	24 hours
1000 cfs	12 hours	20 hours
1500 cfs	10 hours	14 hours
3000 cfs	9 hours	13 hours

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July 2026
Sun	Mon	Tue	Wed	Thu	Fri	Sat
			1550 cfs all day	2Change to 500 cfs at 2am	3Change to 450 cfs at 2am	4
5	6	7	8	9	10	11
12	13	14	15	16	17	18
19	20	21	22	23	24	25
26	27	28	29	30	31