Station E substation

The Station E substation will improve the reliability and capacity of midtown and downtown. 

 Aerial map of the location of the station E substation
Click for larger view of map

SMUD is constructing a new substation in Sacramento at the north end of 20th Street, north of C Street and the Union Pacific Railroad tracks. The new Station E Substation will replace the North City Substation. Constructed in the 1950s, the North City Substation is nearing the end of its planned operational use.

Substations are critical links in the electrical distribution system. Electricity travels through SMUD’s transmission system to substations where it can be converted to a lower voltage before safely being delivered to homes and businesses. The Station E Substation will directly serve the midtown and downtown areas, improving energy reliability and capacity.

Anticipated activities

The scope of work for Final Construction includes:

  • Grading and surfacing
  • Construction of concrete foundations and control building

 Installation of:

  • Underground conduit and grounding
  • Steel structures and equipment (transformers, circuit breakers, switches)
  • Electrical buss and wiring
  • Testing and commissioning
  • Cutover of overhead and underground transmission and distribution lines from the existing North City Substation

Environmental enhancements and management

Environmental leadership is one of SMUD’s core values. SMUD has invested over $16 million to haul away waste and contamination that had been on the site for decades to prepare it for substation construction which begins May 2019. 

The portion of the site where Substation E will be constructed is now much cleaner and safer and meets environmental and geotechnical requirements for construction.

Learn more about the project site and view original CEQA documents.

Learn who will remove the waste and how it will be removed.


Call us at 1-916-732-5715 or email us at with your questions or comments.

Additional information

SMUD and its construction contractor will monitor air quality during substation construction keeping an eye on dust emissions from the site. Air quality monitoring data will be made available here and updated once a week.

View current air monitoring report     Get weather conditions

For previous air quality reports, please email

Learn how to reduce your exposure and protect your health from harmful particle pollution.

SMUD’s contractor is required to implement dust control measures that include the following:

  • Wetting travel areas with water trucks
  • Stockpile management BMPs
  • Onsite speed limit
  • Limited soil disturbance during high winds
  • Dust monitoring
  • Track out control measures
  • Wet power vacuum street sweeping

February 2020 Update

Site construction is going well. Shown below are many of the piers, steel structures and yard electrical equipment in place. Crews will soon begin the electrical interconnections throughout the yard and to the control building.

Construction continues on the approximately 10,000 square foot, 2-story Control Building. Completion of the exterior is scheduled for mid-March. Once the building is weather tight and HVAC is operational, equipment installation can begin. Below are pictures of the structural steel for the roofing and panels being installed.


Yard electrical buss and wiring continues, including installation of insulators, switches and associated equipment.


Other Items:

  • Underground civil construction work continues near the UPRR tracks.
  • We're continuing to work 6 days a week (Monday-Saturdays). Construction is scheduled to complete in Spring 2021.

Project status archive

In 2013, SMUD purchased land next to the North City Substation from Blue Diamond Growers for a new substation. In 2013 and 2014, SMUD held CEQA meetings and conducted environmental analysis for the new project. The City of Sacramento approved the Station E substation project and design in 2014, and Station E construction began in July of 2015.

SMUD halted construction in October of 2015 after waste was discovered in the Station E construction site soil. This included municipal waste, burn waste, scrap metal and construction and demolition debris (Phase 1A).

SMUD conducted extensive testing, site monitoring and revised the project to include a waste mitigation plan (Phase 1B) that prepared the site for construction (Phase 2). Construction is scheduled to begin May 2019.

Project timeline

  • 1960's and 1970's Property Owned by Southern Pacific (now UPRR)
  • 1987-1996 Diamond Operates Co-Generation Plant
  • 2013 SMUD purchased land from Blue Diamond 
  • 2013-2014 SMUD conducted CEQA meetings and environmental review 
  • 2014 City of Sacramento approves Station E Project and Design 
  • 2015 Station E construction began. Burn waste discovered; construction halted
  • 2018 Station E construction May-Oct completed 
  • 2019-2021 Station E construction 
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