Draft Supplemental Environmental Impact Statement<strong>Keystone</strong> <strong>XL</strong> <strong>Project</strong>Pump Station No. Milepost a Transformer Size(Megavolt Amperes)<strong>Keystone</strong> Cushing ExtensionKansasKilovolts <strong>of</strong>ElectricityEstimated ElectricalLine Length (miles)Power ProviderPS-27 49.0* 20/27/33 115 4.6 Clay Center Public UtilityPS-29 144.5* 20/27/33 115 8.9 Westar EnergyaMileposting for each segment <strong>of</strong> <strong>the</strong> proposed <strong>Project</strong> start starts at 0.0 at <strong>the</strong> nor<strong>the</strong>rnmost point <strong>of</strong> each segment and increases in <strong>the</strong> direction <strong>of</strong> oil flow.bExtends across approximately 32 miles <strong>of</strong> Bureau <strong>of</strong> Land Management land.cExtends across approximately 4.8 miles <strong>of</strong> Bureau <strong>of</strong> Land Management land.<strong>Project</strong> Description <strong>2.1</strong>-82 March 2013
Draft Supplemental Environmental Impact Statement<strong>Keystone</strong> <strong>XL</strong> <strong>Project</strong>To <strong>the</strong> extent practicable, <strong>Keystone</strong> would coordinate, and has been coordinating, with <strong>the</strong> localpublic power district to minimize potential impacts to landowners resulting from <strong>the</strong> construction<strong>of</strong> <strong>the</strong> new transmission lines to pump stations. These power providers would construct <strong>the</strong>necessary substations and transformers and would ei<strong>the</strong>r use existing service lines or constructnew service lines to deliver electrical power to <strong>the</strong> specified point <strong>of</strong> use. The electrical powerproviders would be responsible for obtaining <strong>the</strong> necessary permits, approvals, or authorizationsfrom federal, state, and local governments, except in those instances in Montana, where newservice lines less than 10 miles in length would be constructed. Under Montana regulations, <strong>the</strong>sedistribution lines are considered “associated facilities” connected with <strong>the</strong> overall <strong>pipeline</strong>system. Review and approval under Montana law <strong>of</strong> <strong>the</strong> associated facilities occurred as part <strong>of</strong><strong>the</strong> review and approval <strong>of</strong> <strong>Keystone</strong>’s Major Facility Siting Act application.In Montana and South Dakota, <strong>the</strong> following are Western’s actions directly related tocommercial electrical service for <strong>the</strong> proposed <strong>Project</strong> pump stations:• Bowdoin Substation, Phillips County, Montana: Pump Station 9 would be served by Big FlatElectric Cooperative (Big Flat). The interconnection point would be at a new Western AreaPower Administration (Western) owned and operated substation named Bowdoin on itsexisting Fort Peck-Havre 161-kV line. The new substation would consist <strong>of</strong> a Western ownedthree breaker 230-kV ring bus and 115-kV capacitor banks and associated bays. It would alsoinclude two Big Flat owned power transformers, high and low side transformer interrupters,and a 115-kV line bay. Big Flat would construct approximately 55 miles <strong>of</strong> 115-kVtransmission line that would connect <strong>the</strong> new Bowdoin Substation to <strong>the</strong> existing MathSubstation which would directly serve Pump Station 9. Land acquisition for <strong>the</strong> newBowdoin Substation would be by BLM withdrawal and would be completed by <strong>Keystone</strong>.• Fort Peck Substation, McCone County, Montana: Western would expand its existing FortPeck substation to serve Norval Electric Cooperative (Norval) who would distributeelectrical service to Pump Station 10. The substation expansion would include <strong>the</strong>construction <strong>of</strong> a 115-kV breaker bay on <strong>the</strong> south side <strong>of</strong> <strong>the</strong> substation. Land acquisition for<strong>the</strong> substation expansion would be completed by Western.• Coal Hill Substation, McCone County, Montana: Western would construct a new 230-kVswitching station directly adjacent to Pump Station 11. The new Western owned switchyardwould be named Coal Hill, and would be configured in a three breaker ring configuration,with a Norval owned 230/6.9-kV power transformer. Norval would distribute electricalservice to Pump Station 11. <strong>Keystone</strong> would acquire <strong>the</strong> necessary land and transferownership to Western.• Circle Substation, McCone County, Montana: Western previously converted an existing115-kV single substation configuration to a main-and-transfer substation configuration toaccommodate unplanned load growth unrelated to <strong>the</strong> proposed <strong>Project</strong>. At <strong>the</strong> same time,Western replaced a 115/34.5-kV transformer and installed two 8-MVAR shunt capacitorbanks. Western’s unrelated substation expansion would accommodate an interconnectionpoint in <strong>the</strong> 115-kV bus for McCone Electric Cooperative to serve <strong>the</strong> Pump Station 12 load.No additional land acquisition would be required.• O’Fallon Substation, Prairie County, Montana: Western would expand <strong>the</strong>ir existingO’Fallon Substation and construct a new 115-kV breaker bay to accommodate Tongue River<strong>Project</strong> Description <strong>2.1</strong>-83 March 2013
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