Read SSMPA's most recent Quarterly Newsletter

See what our sister organizations are up to:

Foundation for the Preservation of

the Santa Susana Mountains

See the website of the SSFL Community Advisory Group (CAG)

Time for a Rational Cleanup Plan at SSFL

SSFL   /   DOE

Read comments that SSMPA has filed with the US Department of Energy in response to DOE's Environmental Impact Statement

 Three NASA Documents 

Now Raise Serious Concerns about Consequences of the NASA's Proposed Cleanup at Rocketdyne

Preserving and protecting the Santa Susana Mountains and Simi Hills

of Southern California

SSMPA Community Meetings

are "on-hold" during this period of pandemic uncertainty.

more info here


SSMPA Supports Construction of Pedestrian Pathway
into Chatsworth Park South
SSMPA supports the
as it works its way through U.S. Congress

See SSMPA's Response to DTSC's Environmental Impact Report for SSFL Cleanup: HERE

"DTSC must not be bound by arbitrary, politically-predetermined constraints, such as the 2010 Administrative Orders on Consent (AOCs), in its selection of effective and executable cleanup alternatives."

SSMPA Calls for Cleanup at Rocketdyne

  • A Cleanup that Does More Good than Harm
  • A Cleanup that Protects Our Surrounding Communities
  • A Cleanup that Preserves SSFL's Natural Habit and Wildlife
  • A Cleanup that Is "Doable” and Affordable

September 29, 2017:

SSMPA’s Position on Cleanup of Santa Susana Field Lab

The Santa Susana Mountain Park Association (SSMPA) recommends that all responsible parties at the Santa Susana Field Lab (SSFL) execute a minimal impact risk-based cleanup, protective of human health and environment, to EPA’s recreational open space standard.  

SSMPA recommends against excessive cleanup of inert, non-hazardous waste; that is, against a cleanup with a risk that may far exceed the “risk” of leaving inert materials in place.

Which community organizations have already called for a
risk-based cleanup (not "background") at SSFL?

Chatsworth Neighborhood Council

West Hills Neighborhood Council

Woodland Hills–Warner Center Neighborhood Council

Canoga Park Neighborhood Council

Chatsworth Community Coordinating Council (CCCC)

Santa Susana Mountain Park Association (SSMPA)

Lake Manor Citizens Committee Rural Town Council

Chatsworth Nature Preserve Coalition 

as of December 2017

Chatsworth Park South reopened August 31, 2017. Good news!

Meanwhile Chatsworth Park North is under assault from illegal digging and grading by a private party, while the band plays on ... and on.

See here

The Old Mission Equestrian Trail  -  Chatsworth Section

This trail once traversed the width of the San Fernando Valley from the San Fernando Mission west to Chatsworth and Beyond

SSMPA board members Dean and Darlene Wageman are working to preserve the remaining section of the Old Mission Equestrian Trail as a Chatsworth / Los Angeles Cultural Landmark because of the trail's prominent role in our local history as a connection between the San Fernando Mission and Simi Valley and on towards the missions at Ventura and Santa Barbara. The trail section that remains appears to be actively used for both local utilities and shared egress by neighboring residential development.

The Wagemans' concern is that if left unprotected, without a designation as part of Chatsworth's cultural history as a horse keeping community, future development will devour this rare piece of our historical past. Dean and Darlene are requesting assistance in getting the Old Mission Trail officially registered as one of Chatsworth's Historical Landmarks. If you can provide any assistance or guidance, contact Dean at 

See SSMPA's letter of support for memeorializing the Old Mission Trail.

SSMPA Responds to DOE's Draft Environmental Impact Statement for Cleanup at Santa Susana Field Laboratory

We call for a responsible cleanup protecting human health and the environment, the Conservation of Natural Resources Alternative

Read SSMPA's response HERE


SSMPA Supports Extension of the Moratorium on Re-opening the Aliso Canyon Gas Storage Reservoir in the Santa Susana Mountains


See SSMPA's Recomendations for Making Chatsworth Nature Preserve SUSTAINABLE 

See videos by the Santa Susana Field Laboratory

Community Advisory Group (SSFL CAG)

SSMPA supports the creation of a National Monument at the former

Santa Susana Field Laboratory site.

 Notes on Future of Santa Susana Field Lab:

Following are some of the organizations that recently called on the President of the U.S. to establish the SSFL site as a protected National Monument:

  • LANVEN Archeological Society
  • Santa Ynez Band of Chumash Indians Tribal Council
  • SFV Audubon Society
  • SSFL Community Advisory Group (CAG)
  • West Hills Neighborhood Council

Two years ago these organizations all called on the National Park Service to take over the NASA property at SSFL:
  • Canoga Park Neighborhood Council
  • Chatsworth Community Coord. Council
  • Chatsworth NC
  • Granada Hills North NC
  • Granada Hills South NC
  • Equestrian Trails Inc. - Corral 54
  • Lake Balboa NC
  • Porter Ranch NC
  • Reseda NC
  • Valley Alliance of NCs (VANC)
  • Ventura County Archaeological Society
  • West Hills NC
  • Winnetka NC


April 2015

SSMPA Calls on Englander and LA City Planning to

Reject Hidden Creeks Development in Santa Susana Mountains

June 2015

Former Santa Susana Field Laboratory

From  NASA's Comparative Analysis  of

Background versus Risk-based Cleanup Scenarios

for the Soils at Santa Susana Field Laboratory

"The more aggressive cleanup of the site that would occur under the background cleanup (more soil removal, more trucks entering the site, more emissions, more road miles, more soil to dispose of in landfills, etc.) could result in an increase in traffic accidents and spills and more habitat modification, as well as disturbance of wildlife and more impacts to archeological resources, all of which might result in reduced net benefits when compared to the risk‐based cleanup scenario." p. 5-1  

SSMPA's mission is to preserve and protect the Simi Hills, Santa Susana Mountains, and regional open space.

 2019 / 2021 SSMPA Board of Directors 

President: Wendi Gladstone

Treasurer: Teena Takata

Director-at-Large: Robert "Bob" Dager

Director-at-Large: Dean Wageman

Director-at-Large: Sharon Shingai

Vice President: John Luker

Director-at-Large: Michael Horton

Director-at-Large: Warren Stone

Director-at-Large: Darlene Brothers-Wageman

Director-at-Large: Michael Coletti


Dedicated to the Preservation of the Santa Susana Mountains and Simi Hills
A Non-Profit 501(c)(4) Incorporated Nov. 30,1971                Founded Nov. 20,1970
  Email:                    Website:

SSMPA | P.O. Box 4831 | Chatsworth | CA | 91313

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