[env-trinity] CHANGE ORDER NOTICE - FLOWS TO INCREASE AT LEWISTON DAM, DEC. 23

[Abel, Kiana]

[cid:b5d526b3-1774-45f4-bf4c-a3639109589b]
For Immediate Release: December 20, 2024
Contact: Kiana Abel, 530-623-1800, jabel at usbr.gov

CHANGE ORDER NOTICE - FLOWS TO INCREASE AT LEWISTON DAM, DEC. 23

The Bureau of Reclamation Central Valley Operations has approved the Trinity River Restoration Program's request to raise river flows on the Trinity River from Lewiston Dam.

Please expect the following: The release will begin the morning of Dec. 23 and peak at 6500 cubic feet per second starting at midnight on Dec. 25. Flows will slowly ramp down to 300 cubic feet per second on Jan. 11, 2025.

The purpose of a synchronized flow is to use the power of a winter storm to maintain and form river complexity. By combining dam releases with a storm event, mainstem flows help to reduce the impact of sediment deposited from tributaries like Deadwood Creek and recondition the riverbed for prime salmonid habitat and food production.

If you live along the river (or any tributaries), please make sure to move items from the river's edge.

If you would like to receive future Lewiston Dam change order notifications, sign up here: Trinity_Releases<http://groups.google.com/group/trinity-releases/boxsubscribe>  (http://groups.google.com/group/trinity-releases/boxsubscribe)

To follow weather via National Weather Service, click here: National Weather Service Radar<https://radar.weather.gov/region/pacnorthwest/standard>

To contact the Trinity River Restoration Program: info at trrp.net or 530-623-1800

Timing of Flow Thresholds for Water Year 2025 Synchronized Storm Event*

Direction

Date/Time

Threshold


rising

12/23/2024 8:00 AM

350

start
rising

12/24/2024 2:00 AM

1500


rising

12/24/2024 10:00 AM

3000


rising

12/24/2024 6:00 PM

5000


rising

12/24/2024 10:00 PM

6000


peak

12/25/2024 12:00 AM

6500

(peak release)
descending

12/25/2024 2:00 PM

6000


descending

12/26/2024 10:00 AM

5000


descending

12/28/2024 2:00 PM

3000


descending

1/1/2025 12:00 AM

1500


descending

1/11/2025 4:00 AM

300

end

*The above list is not a complete list. To view the full Lewiston Dam Change Order please see below.

date
time
                     from (cfs)
                     to (cfs)
12/23/2024
0800
300
350
1200
350
450
1400
450
600
1800
600
850
2000
850
1100
2200
1100
1350
12/24/2024
0200
1350
1600
0400
1600
1850
0600
1850
2100
0800
2100
2600
1000
2600
3100
1200
3100
3600
1400
3600
4100
1600
4100
4600
1800
4600
5100
2000
5100
5600
2200
5600
6100
12/25/2024
0001
6100
6500
0200
6500
6350
0600
6350
6200
1000
6200
6050
1400
6050
5900
1800
5900
5750
2200
5750
5500
12/26/2024
0200
5500
5300
0600
5300
5150
1000
5150
5000
1400
5000
4800
1800
4800
4600
2200
4600
4400
12/27/2024
0200
4400
4200
0600
4200
4050
1000
4050
3900
1400
3900
3800
1800
3800
3700
2200
3700
3600
12/28/2024
0200
3600
3450
0600
3450
3300
1000
3300
3150
1400
3150
3000
1800
3000
2900
2200
2900
2800
12/29/2024
0200
2800
2700
0600
2700
2600
1000
2600
2500
1600
2500
2400
2200
2400
2300
12/30/2024
0400
2300
2200
0800
2200
2100
1400
2100
2000
2000
2000
1900
12/31/2024
0200
1900
1800
0800
1800
1700
1600
1700
1600
1/1/2025
0001
1600
1500
1000
1500
1400
2000
1400
1300
1/2/2025
0600
1300
1200
1600
1200
1100
1/3/2025
0200
1100
1000
1600
1000
900
1/4/2025
0800
900
800
1/5/2025
0400
800
700
2000
700
600
1/6/2025
2200
600
500
1/8/2025
0400
500
450
1/9/2025
0400
450
400
1/10/2025
0600
400
350
1/11/2025
0400
350
300

Note:  Trinity River Synchronization Flow

Ordered by:  P. Manza


Kiana Abel
Public Affairs Specialist | Trinity River Restoration Program<http://www.trrp.net/> | U. S. Bureau of Reclamation<https://www.usbr.gov/>
1313 S. Main St., Weaverville, CA 96093-1300 | 530-623-1800 (desk) | 530-739-9761 (cell) | jabel at usbr.gov
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