Technical Data
We provide a range of technical transmission data including:
Line Ratings
Information on ampacities of transmission lines and cables are provided in BC Hydro System Operating Order 5T-10. Limitations due to protective relay settings and station equipment are included.
Path Ratings
Descriptions of power transfer capabilities across major transmission paths such as interties with neighbouring utilities.
- Explanation of WSCC Path Rating Terms [PDF, 8 KB]
- 2008 Approved Northwest US-Canada WECC Path Rating [PDF, 235 KB] Posted: November 20, 2008
- Approved Northwest US-Canada WSCC Path Rating [PDF, 9 KB]
- Interim New Northwest US-Canada WSCC Path Rating [PDF, 8 KB]
- 2008 Approved Alberta-BC WECC Path Rating [PDF, 180 KB] Posted: November 20, 2008
- Approved Alberta-BC WSCC Path Rating [PDF, 8 KB]
- Interim New Alberta-BC WSCC Path Rating [PDF, 9 KB]
Outages/Failure Data
- CKY 230 and 138 kV Bus Sections Outage Indices [PDF, 22 KB] Posted: November 2, 2009
- 1L360, 1L361, 1L362, 1L367, and 1L377 Forced Outage Indices [PDF, 31 KB] Posted: April 15, 2009
- 2L309 and 2L313 Outage Data [PDF, 69 KB] Posted: August 7, 2008
- 60L12 and 60L14 Forced Outage Frequency [PDF, 183 KB] Posted: August 5, 2008
- Substation Outage Statistics CSQ-SPG-MAN-MUR [PDF, 113 KB] Posted: July 10, 2008
- Kidd 1 Substation Fault Frequency [PDF, 97 KB] Posted: July 9, 2007
- Failure Data – BC Hydro Transmission Lines [PDF, 206 KB] Updated: Sep 19, 2021
- Failure Data – BC Hydro Northern Interior 138 kV Lines [PDF, 69 KB] Posted: September 18, 2014
- Northwest 500kV Reclosing Settings [TXT, 4 KB]