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Seattle City Light DEBRA SMITH, General Manager and CEO
Denny Substation Project
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Program Overview

Investing in the distribution and transmission of electricity to maintain reliability and meet future needs.

Electrical substations transform electricity from higher to lower voltage before distributing it to consumers. Seattle City Light's Denny Substation Program consists of the following components:
  1. A new electrical substation on Denny Way in South Lake Union's historic Cascade neighborhood
  2. A new power distribution network to serve South Lake Union and the Denny Triangle.
City Light will also construct a new inductor at the Broad Street Substation to help balance the regional transmission system.

Background

Seattle is one of the fastest growing cities in the nation, and South Lake Union and Denny Triangle are among its fastest growing neighborhoods. To meet the accelerating power needs of current and anticipated consumers, City Light decided to construct a new electrical substation. The substation, the first and largest of its kind in 30 years, includes an underground distribution network and transmission line. Prior to construction, the utility conducted a two-year design process that included numerous public meetings, close engagement with stakeholders, and dozens of briefings to neighborhood groups and organizations. This extensive community involvement effort resulted in a one-of-a-kind substation design that meets the needs of the utility, while bringing significant amenities to the neighborhood. Feedback from the community was incorporated in the design of the community spaces, off-leash area, and public art. The new substation will support the city's rapid growth, help fuel the local economy, and provide the community a place to utilize and enjoy for years to come.

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Project Hotline:
(206) 257-2142

Email Address:
SCL_DennySub@seattle.gov

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    700 5th Avenue
    Suite 3200
    P.O. Box 34023
    Seattle, WA 98124-4023


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