Shunt Capacitor Addition at Jones Canyon SubstationCX(s) Applied: B4.11Date: 04/21/2010Location(s): Arlington, OregonOffice(s): Bonneville Power Administration
Office of NEPA Policy and Compliance
April 21, 2010
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CX(s) Applied: B4.11
Date: 04/21/2010
Location(s): Arlington, Oregon
Office(s): Bonneville Power Administration
Bonneville Power Administration will expand its Jones Canyon Substation by 114,680 square feet (2.6 acres) beyond the existing substation area that exists within the fence line of the substation property to install shunt capacitors. The new shunt capacitors will help stabilize the voltage during certain generation and line-system conditions. Within this new area, ground disturbance will include organics/soils removal and the addition of fill materials. The amount of fill needed within the new expansion area will range from 0 to 3.5 feet in depth in order to level out the expansion yard. All fill materials (borrowed fill and rock, and other drainage features) will be brought in through an existing access road located on the east side of the existing substation. Onsite material will be reused as much as possible, but if additional fill material is needed, a nearby supplier will be found. Any excess rocks or boulders would be kept onsite and used to stabilize drainage areas, ditches, or as landscaping features, depending on size. Once the new area of this expansion project has been graded, routine substation equipment will be brought in to occupy this new area. This equipment will include fencing, grounding, conduit, footings, high voltage equipment, overhead grounding pole, and other supplies.