6 - 



A cross dyke to elevation 764.4 m was constructed in the fall of 1985 

 separating Ash Lagoon No. 3 into a north and south section. The north 

 section dyking and liner is complete. Installation of a return structure 

 to the polishing pond and ash piping to Ash Lagoon No. 3 north is planned 

 for 1986 spring. 



An interceptor trench was constructed along the outside of the cross dyke 

 and the remaining exposed southern portion of Ash Lagoon No. 2 east dyke. 

 The trench consists of pervious sand fill and perforated pipe drainage to 

 manhole catchment basin system. The trench is designed to prevent 

 groundwater mounding effects of Ash Lagoon No. 2 and Ash Lagoon No. 3 

 north from adversely effecting the future construction of Ash Lagoon No. 3 

 south. 



An online ball type recirculation condenser cleaning system was installed 

 on Unit No. 1 in 1985. The system is identical to that installed on Unit 

 No. 2 in 1984. The system will continuously recirculate charges of sponge 

 rubber and abrasive coated sponge rubber balls through the condenser tubes 

 to reduce marine and scale deposits on the water side of the tubes. A 

 reduction in scale inhibitor chemical dosing to the cooling water inlet 

 and an increase in intervals between condenser acid cleans will result. 



Mining 



Coal mining continued to the west of Girard Creek and will continue in a 



north westerly direction until 1989 or later. 



