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 7.0 ASH LAGOONS 



7.1 Operations 



Operations during 1991 were similar to the last several years. Ash Lagoon No. 1 was 

 used during winter months and Ash Lagoon No. 3 North was utilized in the summer. Ash 

 Lagoon No. 2 continues to be used as backup when the other two lagoons are not 

 available. 



The total amount of ash that was deposited into the lagoons during 1991 is estimated at 

 487 830 m^ An estimated 224 200 m^ of supply water was added during 1991. 



At the start of October 1991 , all ash was directed to Ash Lagoon No. 3 North. With the 

 colder weather experienced in the last half of October 1991 , ash was redirected to Ash 

 Lagoon No. 2, but pumping from No. 3 North continued to return as much water to the 

 remaining lagoons as possible before freeze up. In the last week of November 1 991 , Ash 

 Lagoon No. 1 was put into service and remained in service to the end of the year. 



7.2 Ash Lagoon Inspections 



Daily and monthly ash lagoon inspections were conducted. There was no sign of dyke 

 misalignment or seepage. 



