[env-trinity] Change Order - Lewiston Dam - UPDATED

Huntt DeCarlo, Caryn chunttdecarlo at usbr.gov
Sun Jul 29 13:48:15 PDT 2018


On Sun, Jul 29, 2018 at 1:30 PM, Thomas Patton <tpatton at usbr.gov> wrote:

> Please maintain release to Trinity River at 800 cfs.
>
> On Jul 29, 2018, at 8:24 AM, Thomas Patton <tpatton at usbr.gov> wrote:
>
> Project: Lewiston Dam
>
>
> Please make the following release changes to the Trinity River:
>
>
>
> Date                Time         From (cfs)     To (cfs)
>
> 07/29/2018      0800           1250               800
>
> 07/29/2018      0900             800               450
>
>
> Comment: Emergency release due to power shutdown and fire activity.
> Expect possible reservoir and river release fluctuations.
> Issued by: Tom Patton
>
>
> On Jul 28, 2018, at 5:22 PM, Thomas Patton <tpatton at usbr.gov> wrote:
>
> Project: Lewiston Dam
>
>
> Please make the following release changes to the Trinity River:
>
>
>
> Date                Time         From (cfs)     To (cfs)
>
> 07/28/2018      1730              750               1250
>
>
> Comment: Emergency release due to power shutdown and fire activity.
> Expect possible reservoir and river release fluctuations.
> Issued by: Tom Patton
>
>
> On Jul 28, 2018, at 3:39 PM, Thomas Patton <tpatton at usbr.gov> wrote:
>
>
> Due to the fire activity, Trinity Dam became isolated from the power
> network and continues to serve a local area of power for safety purposes.
> Spring Creek and Carr power plants are currently down. As a result,
> Lewiston water elevations were managed by emergency increased releases from
> Lewiston Dam and Carr Bypass.   Over Friday night, Lewiston Lake reservoir
> rose higher than the normal operating range which resulted in an increase
> in release from the Trinity River to about 1,100 cfs.  River releases are
> coming down today but are still higher than what was noted yesterday.
> Please take extra precautions due to varying releases on the Trinity River.
>   We are trying to reduce the lake levels but expect this will be difficult
> due to the facility communication issues and power generation situation.
> Low lying areas surrounding the lake and marinas at Lewiston Lake are
> expected to be affected by the higher and variable lake levels.
> Reclamation managed to get Lewiston Dam releases to the Trinity River down
> to about 750 cfs by 3:00 pm Saturday afternoon and will remain at this
> level until further notice.
>
>
> Issued by: Tom Patton
>
>
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