1. WestConnect Regional Transmission Service Tariff
March 16, 2015

2. WestConnect Regional Transmission Service - Status
Began two-year experiment on July 1, 2009
Extended for second two-year term on July 1, 2011.
Participants had filed to amend the Regional Tariff to eliminate date certain termination.
Essentially making the Regional Tariff permanent until termination is approved by the providers.

3. WestConnect Regional Transmission Service - Background
Eliminates transmission rate pancaking for non-firm transactions
Continues to pancake ancillary services and losses
Retains participants’ posted OATT rates
Implemented through wesTTrans platform on OASIS.
Did not require FERC filing for non-jurisdictionals
No state approvals required
Fail-safe clause for non-jurisdictionals
Revenue distributed pro-rata based on posted rates

4. Transmission Service Price Components
The Regional Rate is the highest posted OATT rate in the path
Ancillary Service 1 (scheduling) remains pancaked
Ancillary Service 2 (reactive) assessed only at sink
Losses remain pancaked
Monetized at Palo Verde Index price for date of transaction
Administrative charge is a pass through of OATI charges on behalf of the transmission providers

5. WestConnect Regional Transmission Service - Participants
Arizona Public Service
Black Hills Colorado
BH/BE Common Use System
- Basin Electric Power Coop.
- Black Hills Power, Inc.
- Powder River Energy
El Paso Electric
Public Service New Mexico
Southwest Transmission Cooperative
Tri-State G & T Association
Tucson Electric Power
Western Area Power Administration
- Rocky Mountain Region
- Desert Southwest Region
CRSP Management Office
Xcel Energy/Public Service Colorado

7. Original Experiment Parameters
Risk: Without an increased number of transactions, non-firm transmission revenues could decrease for the affected Regional Participants.
Performance has not dispelled the risk, but transmission providers are comfortable with offering regional transmission service.

8. Contacts and Information
WestConnect (
Doug Reese – Pricing Mgmt. Comm. Chair
Charles Reinhold – Project Manager
WestConnect