Yesterday afternoon Guadalupe River Trout Unlimited (GRTU) received a notice from the United States Army Corps of Engineering (USACE) via Texas Parks and Wildlife (TPWD) stating that USACE, with assistance from the Tennessee Valley Authority (TVA), will be performing maintenance to the release gates on Canyon Dam this winter. This work will necessitate the reduction to zero cubic feet per second (CFS) of water from Canyon Dan for up to 10 hours at a time starting in early December, with a projected end date of early April.
USACE has stated that they, in conjunction with the Guadalupe Blanco River Authority (GBRA), will increase releases following zero flow periods to try and offset the impact their work will cause over the course of this time.
GRTU will provide more updates and share more acronyms as they become available.
ANNOUNCEMENT FROM USACE Outlet work at Canyon Lake impacts low flow releases
CANYON LAKE, Texas – Canyon Dam flood gate replacement work by the Tennessee Valley Authority is scheduled for December 5, 2022 through April 15, 2023 impacting low flow releases.
Low flow releases can range from 55 to 95 cubic feet per second; however, during days when TVA workers need to be in the conduit, flows will be shut off. Usually, the workdays are 10 hours in length and during the 14 hour off duty period, catch up releases will be made. This strategy will minimize stream flow disruptions and allow needed flood gate replacement work to be accomplished in a safe, timely and cost-effective manner.
TVA ONSITE AND IN CONDUIT SCHEDULE
- Onsite Dec 5-16 (In conduit Dec 7-8 to set bulkhead, install cribbing and scaffolding)
- Onsite Jan 2-21 (In conduit Jan 7-21 to remove old service gate and frame seals and install new frame seals)
- Onsite Jan 30-Feb 20 (In conduit Jan 31-Feb 6 and Feb 10-11 to install new service gate)
- Onsite Feb 27-Mar 20 (In conduit Mar 2-18 to remove old emergency gate and frame seals and install new frame seals)
- Onsite Mar 27-Apr 15 (In conduit Mar 29-Apr 1 and Apr 7 to install new emergency gate)
Please be mindful that construction schedules can change and any major deviations will be announced through news releases and social media to keep our water partner, stakeholders and public informed.
For additional information contact the Canyon Lake Office at 830-964-3341 Monday-Friday, 8 a.m. to 4:30 p.m.
Javier E. Pérez Ortiz
US Army Corps of Engineers
Canyon Lake Office