This site will post communications directed to the Roane Community Advisory Group (CAG) as they are received in order to keep the community affected by the TVA ash dike failure fully informed.

General information regarding the CAG and relevant public documents are posted at the CAG website.

Tuesday, February 9, 2010

Report on water quality sampling from recent high water

Below is an update on water sampling from heavy rains at the end of last week. I apologize for not getting this to you yesterday, but I was out unexpectedly.

Routine surface water monitoring at the ten fixed river locations on the Emory, Clinch, and Tennessee occurred on Friday February 5. Local rainfall exceeded 1.0” early Friday morning, so the February 5 routine monitoring coincided with a storm sampling event. In addition, the automated sampler at Emory River Mile 0.5 was activated to collect four samples over the 24-hour period commencing at 7:30 a.m. on February 5, with the final sample collected at 7:30 a.m. on February 6. Observed peak flow (~32,000 cubic feet per second) of the Emory River at Oakdale occurred at 11:30 p.m. on February 5; peak Emory River velocity measured at the ERM 0.5 float occurred at 12:15 a.m. on February 6.

The combination of fixed station monitoring on Friday and the 24-hour automated sampling on Friday/Saturday provides reasonable sampling coverage of the event.

Katie Bell Kline

Senior Manager, Community Relations

Tennessee Valley Authority

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