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Year  Distribution Lines 60kV and below
km
Transmission Lines over 60kV
km
Total Lines
km
 
 
1993188,230  20,779  209,009   
1994185,987  18,920  204,907   
1995211,260  19,979  231,239   
1996230,005  20,625  250,630   
1997199,634  20,637  220,271   
1998194,992  20,327  215,319   
1999168,964  20,456  189,420   
2000162,326  20,425  182,751   
2001168,120  20,302  188,422   
2002165,334  20,714  186,048   
2003          
2004          
2005   21,178      
2006   21,891      
2007   21,891      
2008   22,275      
2009   22,470      
 

References and Related Online Materials

Distribution Lines 60kV and below:See reference for "Total Lines."
Transmission Lines over 60kV:See reference for "Total Lines."
Total Lines:

2005-2009: Alberta Electric Systems Operator, Personal Communication, July 21, 2010. 

1993-2002:Energy Resources Conservation Board (2002). Circuit Kilometres of Transmission and Distribution Lines, 1992-2002 (Table 10). Alberta Electric Industry Annual Statistics (Code ST28, ISSN 0706-1420). Last updated February 25, 2004. http://www.ercb.ca/portal/server.pt/gateway/PTARGS_0_0_308_265_0_43/http%3B/ercbContent/publishedcontent/publish/ercb_home/publications_catalogue/publications_available/serial_publications/st28.aspx (accessed July 21, 2010).

Note: Unfortunately, the ERCB publication ST28 has been discontinued. For more recent data on distribution lines, you will have to contact the individual utility companies directly (ATCO, Fortis, Enmax and Epcor).