2.1 Overview of the Proposed Project - Keystone XL pipeline - US ...

Draft Supplemental Environmental Impact StatementKeystone XL Project2.1.4.1 Pump StationsKeystone would construct a total of 20 pump stations: six in Montana, seven in South Dakota,five in Nebraska (including an expansion to the existing pump station 26 at Steele City), and twoon the existing Keystone Cushing Extension in Kansas. Each pump station would be situated onan approximately 5- to 15-acre site dependent upon the number of pumps present. Each newpump station would consist of three to five pumps driven by approximately 6,500-horsepowerelectric motors, an electrical equipment shelter, a variable frequency drive equipment shelter, anelectrical substation, one sump tank, two MLVs, a communication tower, a small maintenanceand office building, and a parking area for station maintenance personnel. The electrical shelterwould house the electrical systems and the communication and control equipment.Communication towers at pump stations generally would be approximately 33-feet high, but theantenna height at some pump stations may be greater based on final detailed engineering studies.In no event would antennae exceed a maximum height of 190 feet.The pipe entering and exiting the pump station sites would be below grade. As required by 49CFR 195.260, there would be an MLV installed on the entry pipe and on the exit pipe to allowisolation of the pump station equipment in the event of an emergency. The manifold connectingthe pipeline to the equipment at each pump station would be aboveground and entirely within thepump station boundaries. Inspection and maintenance personnel would access the pump stationsthrough a gate that would be locked when the pump station is unoccupied.Keystone would use down-lighting at the pump stations wherever possible to minimize impactsto wildlife and would install a security fence around the entire pump station site. The pumpstations would operate on locally purchased electric power, with diesel-fired emergencygenerators, and would be fully automated for unmanned operation. Batteries would be used tomaintain power to all communication and specific control equipment in the event of a poweroutage. Keystone has proposed the pump station locations based on hydraulic analyses of theflow in the pipeline and other relevant variables. Figures 2.1.1-3 through 2.1.1-5 show theproposed locations of the pump stations. Table 2.1-7 lists the locations of the pump stations bymilepost.Table 2.1-7Proposed Project Pump Station LocationsStateApproximate MilepostMontanaPump Station 09 a 1.2Pump Station 10 49.3Pump Station 11 99Pump Station 12 151.5Pump Station 13 203.1Pump Station 14 239.5South DakotaPump Station 15 288.6Pump Station 16 337.3Pump Station 17 391.5Project Description 2.1-19March 2013