1

Overview of Stanton Division and SPS Lines’ PurchaseJune, 2013

2

Stanton Division System Overview

SPS Borden - Jones 345/230kV Line … … ~ 90 miles

SPP

ERCOT

3

Map of the Sharyland Loop Prior to Docket 39070

SPS Midland

SPS Borden County

To SPS Hobbs Substation

To SPS Grassland Substation

SPS SubstationSPS TransmissionERCOT Transmission

KEY

SDTS SubstationSDTS Transmission

W ST

AN

TO

N

4

SPS Midland

SPS Borden County

DRIVER

SDTS / LCRASKYWEST

BARBER LAKE (Oncor)

EILAND

To SPS Hobbs Substation

To SPS Grassland Substation

ERCOT

SPP

Configuration Per the Agreed Transfer Option in Docket 39070

SPS SubstationSPS Transmission

Non-SDTS ERCOT SubstationNon-SDTS ERCOT Line

KEY

SDTS ERCOT SubstationSDTS ERCOT Transmission

SDTS SPP TransmissionSubstation Disconnected from SPP

1956

W ST

AN

TO

N

SDTS New SPP Transmission

Distrib

ution S

ervice

from E

RCOT Sys

tem

5

MIDLAND

BORDEN COUNTY

DRIVER

SDTS / LCRASKYWEST

BARBER LAKE (Oncor)

EILAND

Configuration if the Proposed Transaction Closes Agreement

Non-SDTS ERCOT Substation

Non-SDTS ERCOT Line

KEY

SDTS ERCOT Substation

SDTS ERCOT Transmission

To a point on the Texas side of the Texas – New Mexico border between the Midland Substation and SPS’ Hobbs Substation

To a point 10.2 miles south of SPS’ Grassland Substation

ERCOT

1956

W ST

AN

TO

N