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A partnership of the Oakdale and South San Joaquin Irrigation Districts

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August 30, 2023

Tulloch Winter 2023/2024 Drawdown Schedule

State regulations for the cycling and inspection of spill gates at the dam occur every three years. Over the course of the 2023/2024 Winter, this extraordinary drawdown will occur. The drawdown schedule has been coordinated with the United States Bureau of Reclamation (USBR), and will be implemented as shown. The schedule follows the general pattern used in past extraordinary drawdown years. Please note that once the reservoir is down to 475’ by January 3, 2024, it will remain at that level until January 30, 2024 to provide time for Tri-Dam to conduct the required inspections with State and Federal officials and maintenance. After that occurs, USBR will slowly begin the fill schedule. An additional schedule will be produced by the USBR, and that will be distributed by Tri-Dam immediately upon receipt.

As always, the published schedule is subject to change in the event of weather events and other operational factors, thus we encourage all persons to exercise caution when operating in an around the reservoir.

The fall drawdown schedule for Tulloch Reservoir is provided below.  This schedule complies with U.S. Army Corps of Engineers flood control requirements.  The reservoir will generally be managed to the target elevation range, however some variation may occur due to large local inflows.

DRAWDOWN SCHEDULE FOR TULLOCH RESERVOIR 
2023/2024 OPERATION SCHEDULE

DateElevation FromElevation To
01 Jun to 19 Sep506.5509.5
20 Sep to 26 Sep505508
27 Sep to 03 Oct503506
04 Oct to 10 Oct501504
11 Oct to 17 Oct499502
18 Oct to 24 Oct497500
25 Oct to 31 Oct495498
01 Nov to 07 Nov493496
08 Nov to 14 Nov491494
15 Nov to 21 Nov489492
22 Nov to 28 Nov487490
29 Nov to 05 Dec485488
06 Dec to 12 Dec483486
13 Dec to 19 Dec481484
20 Dec to 26 Dec479482
27 Dec to 02 Jan 2024477480
03 Jan to 30 Jan475478
31 Jan to 06 Feb478483
07 Feb to 13 Feb483488
14 Feb to 20 Feb488493
21 Feb to 27 Feb493498

Note: WY 2023/2024 is a deeper drawdown to allow for maintenance work.

Article by Tri-Dam Project / Fill Schedule, Tulloch Reservoir

March 24, 2023

Tulloch Spring 2023 Fill Schedule

Tulloch Reservoir Spring Fill Schedule, as received from the Bureau of Reclamation. Please exercise caution at all times when operating in and around the reservoir, as storm events can result in fluctuations due to storm runoff from streams and hills around the reservoir.

Date
From
Date
Through
Elevation
Low
Elevation
High
3/20/20233/28/2023498.6501.6
3/29/20234/04/2023499.0502.0
4/05/20234/11/2023500.0503.0
4/12/20234/18/2023501.0504.0
4/19/20234/25/2023502.0505.0
4/26/20235/02/2023503.0506.0
5/03/20235/09/2023504.0507.0
5/10/20235/16/2023505.0508.0
5/17/20235/23/2023506.0509.0
5/24/20239/12/2023506.5509.5

Ordered by: P. Manza

Article by Tri-Dam Project / Fill Schedule, Tulloch Reservoir

September 8, 2022

Tulloch Winter 2022/2023 Drawdown Schedule

The fall drawdown schedule for Tulloch Reservoir is provided below. This schedule complies with U.S. Army Corps of Engineers flood control requirements. The reservoir will generally be managed to the target elevation range, however some variation may occur due to large local inflow during rain events or facility and operational constraints.

DateElevation FromElevation To
01 Jun to 19 Sep506.5509.5
20 Sep to 26 Sep505508
27 Sep to 03 Oct503.5507
04 Oct to 10 Oct502506
11 Oct to 17 Oct501505
18 Oct to 24 Oct500504
25 Oct to 31 Oct499503
01 Nov to 20 Mar498501.6

 

Article by Tri-Dam Project / Fill Schedule, Tulloch Reservoir

March 10, 2022

Tulloch Spring 2022 Fill Schedule

From: Bureau of Reclamation

2022 Tulloch Spring Fill will follow the typical spring fill procedures, which follow the USACE flood control curve upward. During the spring fill, the reservoir will be managed to the given target elevation ranges as much as possible. Some variations may still occur due to large natural inflows or facility and operational constraints.

Date
From
Date
Through
Elevation
Low
Elevation
High
3/17/20223/22/2022498.6501.6
3/23/20223/29/2022499.4502.4
3/30/20224/05/2022500.1503.1
4/06/20224/12/2022500.9503.9
4/13/20224/19/2022501.7504.7
4/20/20224/26/2022502.4505.4
4/27/20225/03/2022503.2506.2
5/04/20225/10/2022504.0507.0
5/11/20225/17/2022505.5508.5
5/18/20225/24/2022506.5509.5
5/25/20229/15/2022506.5509.5

Issued by: P. Manza

Article by Tri-Dam Project / Fill Schedule, Tulloch Reservoir

September 20, 2021

Tulloch Winter 2021/2022 Drawdown Schedule

The fall drawdown schedule for Tulloch Reservoir is provided below. This schedule complies with U.S. Army Corps of Engineers flood control requirements. The reservoir will generally be managed to the target elevation range, however some variation may occur due to large local inflow during rain events or facility and operational constraints.

DateElevation FromElevation To
01 Jun to 21 Sep506.5509.5
24 Sep to 27 Sep504508
28 Sep to 04 Oct503507
05 Oct to 10 Oct500.0503.0
11 Oct to 17 Oct501505
18 Oct to 23 Oct500504
24 Oct to 31 Oct499503
01 Nov to 19 Mar498501.6

 

Article by Tri-Dam Project / Fill Schedule, Tulloch Reservoir

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News & Updates

Tulloch Winter 2023/2024 Drawdown Schedule

August 30, 2023 by Tri-Dam Project

Tulloch Spring 2023 Fill Schedule

March 24, 2023 by Tri-Dam Project

Road Conditions

Current road conditions to Beardsley and Donnells Reservoirs can be found on their respective pages.

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