Table Rock Has Turned

[Phil Lilley]

Email from MDC:

Yesterday, at the recommended maximum rate of 32 Mw per unit, the tailwater D.O. was in the range of 8 ppm. There has also been a trend of seeing slightly higher D.O. during overnight periods of no generation which could indicate improving oxygen levels in the lower reaches of the lake.

Starting immediately, there is no recommended maximum generation rate at Table Rock. With oxygen on hand to inject if needed, should the tailwater D.O. drop below 4 ppm with any plant load, there should be LOX injected and report the event to the Reservoir Control Branch for further consideration.

Also, tailwater oxygen levels have remained above 6 ppm during generation which allows for the vacuum breaker vents to be unblocked. For all practical purposes, actions to be taken during the low D.O. season appear to be over for Table Rock Dam.

Thanks,

Steve Bays

[Toby from MO]

Phil,

I thought oxygen levels go up on Taneycomo with the turnover. I read this as if they are watching for/expecting a drop.

[Phil Lilley]

The news piece is pretty technical... but reading between the lines - they are ready to inject O2 IF the levels drop. I believe this is a slow turn because our temps just haven't been that cold and TR's water temp is still pretty warm. There could be pockets of water at the dam that are still low in O2 and may hit the outlet so they haven't completely shut off the O2 injectors yet.

But for now- we're getting good water from TR.

That's my take.

[Brian K. Shaffer]

EDIT - I erased my angry message after giving it more thought. -

[Phil Lilley]

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