20180307PAC to Staff UT Appendix A - Path Definitions.pdf

Appendix A
Path Definitions
1 Path Definitions
Path definitions are provided in this section, with an asterisk ‘*’ denoting the
metering points.
1.1 Path 36: TOT 3 (Location: Border between Northeast Colorado and
Southeast Wyoming)
The TOT 3 transmission Path #36 is defined as the sum of flow on the following
lines:
Archer*– Ault 230 kV
Laramie River*– Ault 345 kV
Laramie River* – Story 345 kV
Cheyenne* – Owl Creek 115 kV
Sidney* – Sterling 115 kV
Sidney* – Spring Canyon 230 kV
Cheyenne* – Ault 230 kV
The current path rating is 1680 MW north to south.
1.2 Path 37: TOT 4A (Location: Southwest Wyoming)
The TOT 4A transmission Path #37 is defined as the sum of flow on the following
lines:
Riverton* - Wyopo 230 kV
Standpipe* - Platte 230kV
Mustang* - Spence 230 kV
The current path rating is 1025 MW northeast to southwest with Great Divide normal open
point.
1.3 New: Aeolus West replaces TOT 4A (Location: Southwest Wyoming)
The new Aeolus West transmission is defined as the sum of flow on the following
lines:
 Aeolus* - Anticline 500 kV
 Riverton* - Wyopo 230 kV
 Platte* - Latham 230kV
 Mustang* - Bridger 230 kV
The path rating is 2670 MW East to West based on full Gateway project
1.4 Path 38: TOT 4B (Location: Northwest Wyoming)
The TOT 4B transmission Path #38 is defined as the sum of flows on the following
lines:
 Buffalo – CarrDraw* 230 kV
 Tongue River – Sheridan* 230 kV
 Spence* – Thermopolis 230 kV
 Alcova* – Raderville 115 kV
 Casper* – Midwest 230 kV
 Riverton* – Thermopolis 230 kV
 Riverton 230 kV* – Riverton 115 kV transformers
 Subtract PreCorp load at Sheridan (approximately 4 MW in base case)
The current path rating is 880 MW southeast to northwest.
1.5 Path 30: TOT 1A (Location: Northwest Colorado)
The TOT 1A transmission Path #30 is defined as the sum of flows on the following
lines:
 Craig* - Bonanza 345 kV
 Hayden* - Artesia 138 kV
 Meeker - Rangely 138 kV
The current path rating is 650 MW east to west.