Seattle City Light (City Light) will construct a new electrical substation (Denny Substation) and an underground distribution network (Denny Network) to accomplish a major electrical system upgrade for our rapidly growing city.

The substation will be anything but ordinary in design and function. Its final design includes 44,000 square feet of open space, an elevated walkway, and community event spaces, as well as neighborhood streetscape improvements. The substation will transform electricity into manageable voltages and will create renewable energy through solar technology and a heat recovery system.

The distribution network will deliver electricity to customers throughout South Lake Union and Denny Triangle.

Together, the Denny Network and Substation will provide improved reliability and system flexibility, benefiting customers both in and beyond the project area.

Construction is scheduled for completion in mid-2018.