Updated: 9/28/20

State regulations for the cycling and inspection of gates at the dam have changed from every five years to every three years. In our effort to be fully compliant and ensure the utmost safety of our facilities, Tri-Dam will transition to a three year schedule this winter. 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, 2021 , it will remain at that level until January 9, 2021 to provide time for Tri-Dam to conduct the required inspections with State and Federal officials. 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.

From: Bureau of Reclamation

2020 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.

Issued by: T. Washburn

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.

For further information, please see the Tulloch Reservior page.

Issued by: T. Washburn

Below is the 2019 Tulloch fill schedule, as just received from the Bureau of Reclamation. As always, the schedule is subject to substantial variation due to natural inflow during or after storm events. Please exercise caution when operating in and around the reservoir at all times.

2019 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.

Issued by: T. Washburn

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.