Tri-Dam Project

A partnership of the Oakdale and South San Joaquin Irrigation Districts

Tulloch Spring 2017 Fill Schedule

The spring filling schedule for Tulloch Reservoir is provided below, as received from the US Bureau of Reclamation. The schedule complies with Army Corps of Engineers flood control constraints, and elevations are projected to lie between the low and high bands. Note that actual elevations may vary temporarily due to inflow to Tulloch during rain events, or unforeseen operational constraints. Residents and others operating in and around the reservoir should exercise care at all times.

From Through Low High
3/21/2017 4/5/2017 498.6 502
4/6/2017 4/12/2017 499 503
4/13/2017 4/19/2017 500 504
4/20/2017 4/26/2017 501 505
4/27/2017 5/3/2017 502 506
5/4/2017 5/10/2017 503 507
5/11/2017 5/17/2017 504 508
5/18/2017 5/25/2017 505 509
5/26/2017 9/15/2017 506.5 509.5

Special Notice for Storm Events

In the interest of utmost safety during the upcoming storm event(s), this notification is to advise you of a possible slight modification to the reservoir levels at Tulloch during these periods of significant rain/snow. Tri-Dam is working, along with the US Bureau of Reclamation to safely manage the reservoir levels and storm runoff, holding and releasing waters as necessary to ensure the safety of all persons along the Stanislaus River system including upcountry and downstream users. The current 2016 fall reservoir schedule for this year, as provided by prior notice is as follows:

From Through Low High
9/16/2016 9/22/2016 506.0 509.0
9/23/2016 9/29/2016 504.7 507.7
9/30/2016 10/6/2016 503.5 506.5
10/7/2016 10/13/2016 502.2 505.2
10/14/2016 10/20/2016 500.9 503.9
10/21/2016 10/27/2016 499.5 502.5
10/28/2016 3/20/2017 498.6 501.6

The reservoir is currently being operated within the range, as highlighted above 498.6’ to 501.6’. In conjunction with the US Bureau of Reclamation, Tri-Dam is planning to operate Tulloch Reservoir within this range, however, this advisory is being sent to advise you that, in the interest of extreme caution, it may be necessary to operate the reservoir as low as 498.0 feet in order to provide additional water storage space over the next two weeks. The purpose of the adjustment is to use the reservoir to store additional water, if needed and allow Tri-Dam to make metered downstream releases, as needed to prevent and/or minimize downstream flooding.

As always, even when the reservoir is managed within the ranges noted, actual elevations may vary temporarily due to inflow to Tulloch Reservoir during rain events, or unforeseen operational constraints. Residents and others operating in and around the reservoir should exercise care at all times.

In the event that you have any questions, please feel free to contact me.

Susan Larson
License Compliance Coordinator
Tri-Dam Project
PO Box 1158
Pinecrest, CA 95364
(209) 785-3838
slarson@tridamproject.com

Tulloch Fall 2016 Draw Down Schedule

Shown below is the fall/winter schedule for Tulloch Reservoir, as received from the US Bureau of Reclamation. The schedule complies with US Army Corps of Engineers flood control requirements, and elevations are projected to fall within the ranges noted below. Note that the reservoir will be managed within the ranges noted below, but the actual elevations may vary temporarily due to inflow to Tulloch Reservoir during rain events, or unforeseen operational constraints. Residents and others operating in and around the reservoir should exercise care at all times.

From Through Low High
9/16/2016 9/22/2016 506.0 509.0
9/23/2016 9/29/2016 504.7 507.7
9/30/2016 10/6/2016 503.5 506.5
10/7/2016 10/13/2016 502.2 505.2
10/14/2016 10/20/2016 500.9 503.9
10/21/2016 10/27/2016 499.5 502.5
10/28/2016 3/20/2017 498.6 501.6

 

Tulloch Spring 2016 Fill Schedule

Below is the spring fill schedule for Tulloch Reservoir, as received from the US Bureau of Reclamation. The schedule complies with US Army Corps of Engineers flood control constraints, and elevations are projected to fall within the ranges noted below. Note that actual elevations may vary temporarily due to inflow to Tulloch Reservoir during rain events, or unforeseen operational constraints. Residents and others operating in and around the reservoir should exercise care at all times.

From Through Low High
3/21/2016 4/5/2016 498.6 502
4/6/2016 4/12/2016 499 503
4/13/2016 4/19/2016 500 504
4/20/2016 4/26/2016 501 505
4/27/2016 5/3/2016 502 506
5/4/2016 5/10/2016 503 507
5/11/2016 5/17/2016 504 508
5/18/2016 5/25/2016 505 509
5/26/2016 9/15/2016 506.5 509.5

Anticipated Final Tulloch Reservoir Schedule

Tri-Dam has received additional updated information from the US Bureau of Reclamation (Bureau).  The Bureau advises that the current reservoir level range is likely to be maintained throughout the winter season as noted during our last update of September 21st, 2015.   Tulloch reservoir is currently being operated within the elevation range of  498′ to 501′, which is the normal winter holding elevation.  It is expected that the reservoir will be held within this range for the remainder of the winter season, until the fill schedule is produced in February/March 2016.  It is important to keep in mind however, that heavy rains and excessive runoff could cause Tulloch to rise above this level, if needed, to manage downstream flooding during heavy rain events.

This week’s update from the Bureau notes that the Bureau does not expect any change in the normal winter holding elevation at Tulloch  as noted above due to decreasing atmospheric temperatures, which are decreasing water temperatures downstream of Tulloch both at Goodwin and Orange Blossom.

Should the regulatory agencies determine that additional drawdown is necessary, Tri-Dam will provide immediate notification.  Although the current schedule is expected to remain in effect, it is important to continue to watch for updates and check the website periodically at www.tridamproject.com.

This schedule complies with U.S. Army Corps of Engineers flood control requirements.  The reservoir will generally be managed to the target elevation ranges, but some variation may occur due to large natural inflows or facility and operational constraints.  As always, please exercise care when operating in and around the reservoir.