9/24/2020 11pm WWMT I-TEAM Investigates... Sediment Flowing Through Morrow Dam
- Mrs.Amber.Balkema
- Sep 24, 2020
- 1 min read
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More on this discussion from Mel Visser:
In 1984-5 the 1.0-1.8 kg carp in Morrow Pond contained 3+ppm of PCBs. That's seven years after banning. Earlier fish were more contaminated.
Concentration in fish is proportional to concentration in sediment. (The Kern equation is used to guide sediment removal)
Old Morrow sediments will contain PCBs far above removal guidelines.
Are these the sediments that are flowing down the river now?
Shouldn't we know the PCB load to the river from the tons of sediment flushed down?
By better understanding the magnitude of PCB transfer with from dam drawdown we may be able to manage the problem when and if the Calkins Dam needs to do a draw down.