Manufactured Gas Plants

Former Santa Rosa Manufactured Gas Plant

Former Santa Rosa manufactured gas plant around 1900

A former manufactured gas plant (MGP) historically operated near the corner of First Street and Santa Rosa Avenue in Santa Rosa, California starting in 1876. PG&E acquired and operated the former Santa Rosa MGP from 1908 until 1924, at which time the plant was closed and dismantled. The site later operated as a natural gas distribution center. PG&E sold the property in 1987. Today the site is the location of an office building parking lot.

Under the oversight of the North Coast Regional Water Quality Control Board (Water Board) and the Santa Rosa Fire Department (SRFD), PG&E has completed several phases of remediation at the site and is currently developing plans to address the remaining impacts.

Recently, PG&E completed a phase of site cleanup, conducted from 2008 to 2013, which included the removal of 55,000 gallons of liquid coal tar using electrical resistance heating technology and disposal of 1300 tons of soil containing former gas plant residues.

PG&E has submitted two feasibility studies to the Water Board for long-term protection of groundwater. Both feasibility studies considered construction of a barrier between the site and Santa Rosa Creek, involving a large, in-creek construction effort over multiple years. This intrusive work would create a variety of impacts to the surrounding community, including shutting down the Prince Memorial Greenway for an extended period of time.

Given the potential impacts of the barrier construction to the community and because current site conditions are stable and groundwater impacts are limited and not migrating to the Creek, the Water Board concluded that PG&E should consider less intrusive remedies to protect groundwater. PG&E is revising the current feasibility study and will submit it for Water Board and SRFD review in fall 2014. The public will have an opportunity to review the revised feasibility study and provide comments to the Water Board before a final remedy is selected.


Additional Resources:

All MGP Locations
Chico Oakdale San Rafael
Colusa Oakland Santa Cruz
Daly City Oroville Santa Rosa
Eureka Red Bluff Selma
Fresno - 1 Redding St. Helena
Fresno - 2 Redwood City Stockton
Hollister Sacramento -1 Tracy
Lodi Salinas Turlock
Madera San Francisco - Adjacent To Potrero Vallejo
Marysville - 1 San Francisco - Beach Street Watsonville - 1
Merced San Francisco - Fillmore Watsonville - 2
Modesto - 1 San Francisco - North Beach Willows
Monterey San Francisco - Potrero Woodland
Napa San Luis Obispo - 1
  • Carbon Calculator
  • Report a Streetlight Outage
  • Careers at PG&E