Here's the latest Arroyo News: NOVEMBER CURRENTS

We're Back in Court Tuesday — Protecting Hahamongna

Now that the County Supervisors have certified the Flood Control District's revised program, Judge James Chalfant will consider whether the revisions satisfy his court order that the Big Dig program must fully comply with the California Environmental Quality Act. Despite the Supervisors' recent action, there are still big problems with the Big Dig.

Please join us Tuesday in Room 834 of Superior Court downtown at 1:30 pm.


Supervisors Scale Back Big Dig at Hahamongna

Surprise Amendment by Supervisor Barger dramatically reduces the size and negative impacts of Flood Control's Big Dig.

November 8, 2017 — The LA County Board of Supervisors by a unanimous vote yesterday substanially modified and reduced the Flood Control District's Big Dig program for Hahamongna Watershed Park.

Besides reducing the size and negative impacts of the program, there were additional commitments made to support ecosystem restoration and water conservation in the Arroyo Seco. The vote represents a significant step forward toward Saving Hahamongna.


Thanks, Supervisors, For Showing That Hahamongna is Important to You

Hahamongna's Fate: It's Up to You . . . and the County Supervisors

On Tuesday, November 7th the County Board of Supervisors will hold a public hearing on Hahamongna and the County Flood Control District's devastating program to remove 2.4 million cubic years of soil and habitat from the basin. The Flood Control District has made some very minor concessions in the program, but the worst parts are still there: 1) its too big; 2) too fast; and 3) too destructive to habitat, our air quality, traffic and neighborhoods.

We hope the Supervisors will exercise their good judgment and environmental commitment by significantly modify the Flood Control District's antiquainted and devastating approach. The Board of Supervisors must act to certify that the entire EIR is in compliance with the California Environmental Quality Act (CEQA), but the plan is still woefully deficient.

This is the time for those who care about Hahamongna to speak with a loud voice telling the Supervisors to Save Hahamongna and ensure that the sediment removal program is reshaped along more sustainable lines.


Native Fish in the Arroyo — Can We Bring Them Back?

The answer, of course, is Yes! While there are numerous barriers and problems, the conditions in many parts of the Arroyo watershed are excellent for native fish including Rainbow Trout and Steelhead.

Our July meeting at the Pasadena Public Library generated a lot of interest and discussion about native fish. The Pasadena Star-News featured a great article and KPCC hosted an interview with Tim Brick on native fish.

Star-News: Is re-introducing steelhead trout into the Arroyo Seco another fish tale?

KPCC: After nearly 100 years, steelhead trout are planning a comeback.

Nursery News

Fall is a dynamic time for a nursery. The acorns are falling and many native plants are full of seeds. Seeds for the future. We got past the long hot summer and are now preparing next years selection of locally-generated native plans for restoration programs and conservation-oriented landscaping.

Would you like to be part of the Hahamongna Nursery Team? You can learn about native plant identification and how to propagate and tend California's most venerable and spectacular plants. Send an email to

For information call the nursery number at (626) 657-0392 to leave a message or send an email to

San Gabriel Mountains National Monument —
On the Chopping Block?

Mayor Tornek Announces Arroyo Planning Effort

A new advisory committee has been formed by Mayor Tornek and the City of Pasadena to develop a visionary plan for the future of the Arroyo Seco.

Judge Halts Big Dig in Hahamongna

Judge James Chalfant has ordered a stay of all activity related to the County Flood Control District's massive sediment mining and trucking operation in Hahamongna Watershed Park. In a big victory of the Arroyo Seco Foundation and Pasadena Audubon, the judge ordered LA County to revise sections of the EIR dealing with air pollution, cumulative impacts from other projects and the amount of mitigation that must be completed.

KPCC- "Environmentalists win temporary halt to Devil's Gate Dam dig-out"

Pasadena Now - "Judge Halts Devil's Gate Sediment Removal Project"

March 23 Hearing  |  Fact Sheet  |  Contact the Supervisors

December, 18, 2016 - Volunteers from Arroyo Seco Foundation and Hahamongna Nursery along with Linda Vista Library Associates transformed the library into a beautiful native plant garden.

Exciting Arroyo Ecosystem Restoration Plans Unveiled

An almost overwhelming array of restoration alternatives for the Arroyo Seco were presented at a November 15, 2016 workshop in Pasadena.

Meeting Report | Frequently Asked Questions | Alternatives

Learn About the Plan to Restore the Arroyo

Click here to view the US Army Corps of Engineers' Presentation

Seifert: Cities Must Engage

2017 Is the Year of the Arroyo Seco River

Three Great Hikes in the Arroyo Seco

The New Board of Supervisor Should Say No to the County's Big Dig Program for Hahamongna

Now that Superior Court Judge has found County Flood's Environmental Impact Report for the sediment mining and trucking operation in Hahamongna grossly deficient, it's time for the new Board of Supervisors to take a fresh look at the County's devastating plan for the Arroyo Seco. Their program to send 400+ double-bedded, diesel-spewing trucks per day for the next five years to clog our streets and neighborhoods and permanently destroy our region's most important treasure just doesn't make sense, and the new board should show the leadership to mandate a long-term, sustainable sediment management plan that can protect Hahamongna and our neighborhoods from environmental destruction while providing sustainable flood protection.

Arroyo River Parks
Restoring a Living River

Arroyo Seco Canyon Project

The Canyon Project is an innovative program to improve water resources and environmental conditions in the Arroyo co-sponsored by the Arroyo Seco Foundation and Pasadena Water & Power Department. As the result of a legal challenge, the project is now undergoing further environmental review.


Why Not a Complete San Gabriel Mountains National Monument

By a mysterious process that no one will explain, the Arroyo Seco and the southwest corner of the Angeles National Forest were eliminated at the last minute when the San Gabriel Mountains National Monument was announced. It's a shame because many of the most treasured and historic sites in the San Gabriel Mountains are contained in the territory that was not included.

Congresswoman Judy Chu has now proposed legislation that would expand the boundaries of the national monument to include all of the treasures of the Angeles National Forest.

Don't Forget Your Conservaton Habits. Click Here:

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