Path Rating Catalog 2013 - Western Electricity Coordinating Council

30. TOT 1A
Revised December 2012
Accepted Rating
Existing Rating
Other
Location:
Definition:
Transfer Limit:
Extreme Northwest Colorado
Sum of the flows on the following transmission lines:
Line
Metered End
Bears Ears-Bonanza 345 kV Bears Ears
Hayden-Artesia 138 kV
Hayden
Meeker-Rangely 138 kV
Rangely
East to West: 650 MW (maximum)
West to East: Not defined
Critical
Disturbance
that limits the
transfer
capability:
When:
System
Conditions:
Outage of the Bears Ears-Bonanza 345 kV line. The limiting element
can be the emergency overload on the Hayden-Artesia 138 kV line, or
the Meeker-Rangely 138 kV line (see attachment).
Rating established in March 1990 with the publication of “Bears Ears-
Bonanza 345 kV Line Operating Study Report.”
The operating study was conducted jointly by:
Western Area Power Administration - Salt Lake, Golden, Montrose
Tri-State Generation & Transmission Association, Inc. (TSGT)
Utah Associated Municipal Power System
Platte River Power Authority
Deseret Generation and Transmission Co-operative
Salt River Project
Utah Power & Light Co. (now PacifiCorp)
Colorado-Ute Electric Association (now TSGT and Public Service
Company of Colorado)
This rating is independent of transfer levels between major areas of
WECC, although the actual flow is heavily impacted by east to west
inadvertent. The transfer limit is impacted by local area generation and
load levels. Historically, the flows have been predominantly east to
west across the path.
PART VI Item 1-85