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.

Date From	Date Through	Elevation Low	Elevation High
9/17/2018	9/23/2018	506.0	509.0
9/24/2018	9/30/2018	504.7	507.7
10/01/2018	10/07/2018	503.5	506.5
10/08/2018	10/14/2018	502.2	505.2
10/15/2018	10/21/2018	500.9	503.9
10/22/2018	10/28/2018	499.5	502.5
10/29/2018	03/22/2019	498.6	501.6

 

The Spring 2018 Tulloch fill schedule will be done in two phases. The first phase will take place between February 1 and March 12, when the reservoir pool will be raised back to the normal winter elevation of 501.6 ft. The rate of fill will approximately follow the daily ranges below, but there may be substantial variations due to natural inflow or storm events. Since this phase of the reservoir fill is not governed by USACE flood control requirements, any extra inflow will be retained rather than released.

The second phase of the reservoir fill will follow the typical spring fill procedures, which follow the USACE flood control curve upward. During this phase, 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.

Phase 1: Elevation targets are approximate.

Date	Low	High
1/31/2018	475.0	478.0
2/1/2018	475.6	478.6
2/2/2018	476.2	479.2
2/3/2018	476.8	479.8
2/4/2018	477.4	480.4
2/5/2018	478.0	481.0
2/6/2018	478.5	481.5
2/7/2018	479.1	482.1
2/8/2018	479.7	482.7
2/9/2018	480.3	483.3
2/10/2018	480.9	483.9
2/11/2018	481.5	484.5
2/12/2018	482.1	485.1
2/13/2018	482.7	485.7
2/14/2018	483.3	486.3
2/15/2018	483.9	486.9
2/16/2018	484.4	487.4
2/17/2018	485.0	488.0
2/18/2018	485.6	488.6
2/19/2018	486.2	489.2
2/20/2018	486.8	489.8
2/21/2018	487.4	490.4
2/22/2018	488.0	491.0
2/23/2018	488.6	491.6
2/24/2018	489.2	492.2
2/25/2018	489.8	492.8
2/26/2018	490.3	493.3
2/27/2018	490.9	493.9
2/28/2018	491.5	494.5
3/1/2018	492.1	495.1
3/2/2018	492.7	495.7
3/3/2018	493.3	496.3
3/4/2018	493.9	496.9
3/5/2018	494.5	497.5
3/6/2018	495.1	498.1
3/7/2018	495.7	498.7
3/8/2018	496.2	499.2
3/9/2018	496.8	499.8
3/10/2018	497.4	500.4
3/11/2018	498.0	501.0
3/12/2018	498.3	501.3

Phase 2:

From	Through	Low	High
3/13/2018	3/19/2018	498.6	501.6
3/20/2018	3/26/2018	499.4	502.4
3/27/2018	4/02/2018	500.1	503.1
4/03/2018	4/09/2018	500.9	503.9
4/10/2018	4/16/2018	501.7	504.7
4/17/2018	4/23/2018	502.4	505.4
4/24/2018	4/30/2018	503.2	506.2
5/01/2018	5/08/2018	504.0	507.0
5/09/2018	5/15/2018	505.5	508.5
5/16/2018	5/23/2018	506.5	509.5
5/24/2018	9/15/2018	506.5	509.3

 

The Tulloch Reservoir Fall/Winter 2017 schedule as just received from the Bureau of Reclamation is shown below. As contemplated, this is the year of the extended drawdown to allow for Tri-Dam to comply with requisite dam safety inspections, testing and maintenance if needed. Once the reservoir reaches maximum drawdown in early January 2018, it is expected to remain at that level for a period not to exceed 4 weeks, however, this is subject to change in the event of storm events and heavy precipitation.

Tri-Dam is providing this schedule to you immediately upon its’ receipt so that you can make necessary plans for securing docks and other facilities, along with planning for any work that you may like to do over the coming fall/winter season. All work to be done at the 515’ contour and below, pursuant to FERC license requirements requires that Tri-Dam review and authorize the work in advance, thus we will be working closely with all parties seeking to perform work to ensure that all Tri-Dam permits are in place, and assist in coordinating permits from State and Federal agencies where required.

In terms of the temporary moving of docks, coordination in advance with Tri-Dam will be needed to ensure that docks are placed in approved and safe locations. Please contact me directly and I will assist wherever needed to ensure that administrative clearance is obtained prior to the movement of docks around the reservoir.

For those landowners and contractors seeking to perform work during the extended drawdown, involving the installation of low water supports and/or excavation, Tri-Dam requests that all such applications be filed as soon as possible, and by November 1, 2017 at the very latest so that processing can occur well in advance of the planned work. While Tri-Dam is poised to provide a quick processing turnaround time for those filing complete applications, we are advised that State and Federal permits require additional time, thus a November 1, 2017 deadline would provide greater certainty that all approvals will be in place to allow you to perform the desired work. Tri-Dam will assist in the coordination of permits with State and Federal permits if needed, so please contact me with any specific questions. All application forms, fee schedule, and overview of the permitting process are available for review on Tri-Dam’s website at www.tridamproject.com. To facilitate the installation of low water supports, Staff recommended and the Board approved an application fee of $250.00 for those landowners with approved facilities who seek to install low water supports only without any further modifications or work.

As always, the schedule provided by the Bureau of Reclamation is subject to change based upon significant weather events thus all persons operating in and around the reservoir are encouraged to take care at all times. The schedule will be posted on Tri-Dam’s website, including any updates or modifications as soon as they are received. Please share this schedule with all interested persons, and in the event that you would like to be added to the Tulloch Email Distribution list, please let me know.
If you have any further questions, or need any information please contact me and I will be happy to assist you.

Regards,
Susan Larson
License Compliance Coordinator
Tri-Dam Project
PO Box 1158
Pinecrest, CA 95364
(209) 785-3838

Bureau of Reclamation

The fall drawdown schedule for Tulloch Reservoir is provided below. The schedule complies with the Army Corps of Engineers flood control requirements, and elevations are projected to lie between the low and high bands. Actual elevations may vary temporarily due to rainfall events or unforeseen operational constraints. This schedule incorporates an additional drawdown below the normal floor in order to permit required inspections and testing at Tulloch Reservoir in early January 2018. The exact duration of the inspection/testing is unknown at this time, but will probably be several weeks, weather permitting. At the conclusion of this work (currently anticipated to be late January or early February), a revised schedule will be issued and Tulloch will be allowed to refill to the normal winter elevation of 501.6 ft.

Date From	Date Through	Elevation Low	Elevation High
5/26/2017	9/12/2017	506.5	509.5
9/13/2017	9/19/2017	505.8	508.8
9/20/2017	9/26/2017	504.7	507.7
9/27/2017	10/3/2017	503.5	506.5
10/4/2017	10/10/2017	502.3	505.3
10/11/2017	10/17/2017	501.1	504.1
10/18/2017	10/24/2017	499.9	502.9
10/25/2017	10/31/2017	498.8	501.8
10/31/2017	11/1/2017	498.6	501.6
11/1/2017	11/2/2017	498.3	501.3
11/2/2017	11/3/2017	498.1	501.1
11/3/2017	11/4/2017	497.8	500.8
11/4/2017	11/5/2017	497.5	500.5
11/5/2017	11/6/2017	497.2	500.2
11/6/2017	11/7/2017	497.0	500.0
11/7/2017	11/8/2017	496.7	499.7
11/8/2017	11/9/2017	496.4	499.4
11/9/2017	11/10/2017	496.1	499.1
11/10/2017	11/11/2017	495.8	498.8
11/11/2017	11/12/2017	495.6	498.6
11/12/2017	11/13/2017	495.3	498.3
11/13/2017	11/14/2017	495.0	498.0
11/14/2017	11/15/2017	494.7	497.7
11/15/2017	11/16/2017	494.4	497.4
11/16/2017	11/17/2017	494.1	497.1
11/17/2017	11/18/2017	493.8	496.8
11/18/2017	11/19/2017	493.6	496.6
11/19/2017	11/20/2017	493.3	496.3
11/20/2017	11/21/2017	493.0	496.0
11/21/2017	11/22/2017	492.7	495.7
11/22/2017	11/23/2017	492.4	495.4
11/23/2017	11/24/2017	492.1	495.1
11/24/2017	11/25/2017	491.8	494.8
11/25/2017	11/26/2017	491.5	494.5
11/26/2017	11/27/2017	491.2	494.2
11/27/2017	11/28/2017	490.9	493.9
11/28/2017	11/29/2017	490.6	493.6
11/29/2017	11/30/2017	490.3	493.3
11/30/2017	12/1/2017	490.0	493.0
12/1/2017	12/2/2017	489.6	492.6
12/2/2017	12/3/2017	489.3	492.3
12/3/2017	12/4/2017	489.0	492.0
12/4/2017	12/5/2017	488.7	491.7
12/5/2017	12/6/2017	488.4	491.4
12/6/2017	12/7/2017	488.1	491.1
12/7/2017	12/8/2017	487.8	490.8
12/8/2017	12/9/2017	487.4	490.4
12/9/2017	12/10/2017	487.1	490.1
12/10/2017	12/11/2017	486.8	489.8
12/11/2017	12/12/2017	486.5	489.5
12/12/2017	12/13/2017	486.1	489.1
12/13/2017	12/14/2017	485.8	488.8
12/14/2017	12/15/2017	485.5	488.5
12/15/2017	12/16/2017	485.1	488.1
12/16/2017	12/17/2017	484.8	487.8
12/17/2017	12/18/2017	484.5	487.5
12/18/2017	12/19/2017	484.1	487.1
12/19/2017	12/20/2017	483.8	486.8
12/20/2017	12/21/2017	483.5	486.5
12/21/2017	12/22/2017	483.1	486.1
12/22/2017	12/23/2017	482.8	485.8
12/23/2017	12/24/2017	482.4	485.4
12/24/2017	12/25/2017	482.1	485.1
12/25/2017	12/26/2017	481.7	484.7
12/26/2017	12/27/2017	481.4	484.4
12/27/2017	12/28/2017	481.0	484.0
12/28/2017	12/29/2017	480.7	483.7
12/29/2017	12/30/2017	480.3	483.3
12/30/2017	12/31/2017	479.9	482.9
12/31/2017	1/1/2018	479.6	482.6
1/1/2018	1/2/2018	479.2	482.2
1/2/2018	1/3/2018	478.4	481.4
1/3/2018	1/4/2018	477.5	480.5
1/4/2018	1/5/2018	476.6	479.6
1/5/2018	1/6/2018	475.7	478.7
1/6/2018	1/7/2018	475.3	478.3
1/7/2018	1/8/2018	475.0	478.0
1/8/2018	1/31/2018	475.0	478.0

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

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