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Path Rating Catalog 2013 - Western Electricity Coordinating Council

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39. TOT 5<br />

Revised January <strong>2013</strong><br />

Accepted <strong>Rating</strong><br />

Existing <strong>Rating</strong><br />

Other<br />

Location:<br />

Definition:<br />

Transfer<br />

Limit:<br />

Critical<br />

Disturbance<br />

that limits the<br />

transfer<br />

capability:<br />

When:<br />

West-Central Colorado<br />

Sum of the flows on the following transmission lines:<br />

Line<br />

Metered End<br />

North Park-Archer 230 kV<br />

Archer<br />

Craig-Ault 345 kV<br />

Craig<br />

Hayden-Gore Pass 230 kV<br />

Gore Pass<br />

Hayden-Gore Pass 138 kV<br />

Gore Pass<br />

N. Gunnison-Salida (Poncha Jct.) 115 kV Poncha<br />

Curecanti-Poncha 230 kV<br />

Curecanti<br />

Basalt-Malta 230 kV<br />

Basalt<br />

Hopkins-Malta 230 kV<br />

Hopkins<br />

West to East: 1680 MW<br />

East to West: Not defined<br />

The critical disturbance is the outage of the Hayden-Gore Pass 230 kV line and the<br />

remedial action of opening the parallel Hayden-Gore Pass 138 kV line.<br />

The initial rating was established in the “Hayden-Blue River 230 kV Transmission Line<br />

Operating Study, Phase 1 Report - System Normal Operation” dated October 1987; and<br />

“Phase 2 Report - Line Outage Conditions” dated May 1988. A new operating study<br />

which redefined this path was completed The operating study was conducted jointly by:<br />

Platte River Power Authority (PRPA)<br />

Public Service Company of Colorado (PSC)<br />

Tri-State Generation & Transmission Association, Inc. (TSGT)<br />

<strong>Western</strong> Area Power Administration (WAPA) - Salt Lake, Golden, Montrose, Loveland<br />

System<br />

Conditions:<br />

This rating is independent of peak load/light load assumptions or transfer levels between<br />

major areas of WECC. This path is affected primarily by power exchanges within<br />

Colorado, and historically the flows have all been west to east across the path.<br />

PART VI Item 1-111

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