May 2014

Pasadena Adopts a Sustainable Sediment Solution for Hahamongna

The Pasadena City Council has adopted the recommendations of a Sediment Working Group that the city established several months ago to develop a plan for Devil's Gate Dam and Hahamongna. The recommendations would reduce the negative impacts of LA County Flood Control District's plan for trucking sediment out of Hahamongna Watershed Park and preserve the rich habitat there.
News Coverage | Recommendations

SoCalGas Helps Protect Arroyo Habitat

Southern California Gas Company volunteers and their families came to the Arroyo for an Earth Day activity on April 26. Over 40 energetic workers spent the morning removing French broom and eupatory from the natural stream zone below Devil's Gate Dam. Pasadena Mayor Bill Bogaard came by to encourage the volunteers and emphasize how important such work is to preserve the unique habitat and character of the Arroyo Seco.

ASF thanks SoCalGas for sponsoring this event and their stellar volunteers for their hard work.

ASF Launches Hahamongna Cooperative Nursery

Stream Team

ASF is excited to announce that next Friday, May 23, we will be hosting a big work day to get the new Hahamongna Cooperative Nursery into shape. The site has been unused for several years, so there is a lot of work to be done—the more hands the merrier! The nursery will be used to progate local native plants for restoration projects, beginning with the Arroyo Seco Canyon Project.

Volunteers can participate in two to three hour shifts from 9:30 am to 4:00pm. Contact Rebecca Shields Moose at for more information.

For information about other upcoming volunteer opportunities, visit our activity roster or contact Scott Cher at

The Drought Continues

Drought Map

The high temperatures and numerous fires this week are a severe reminder that we all need to keep doing our part to conserve water for when it is most needed. Visit our conservation page and learn more about how you can help.

Don't forget that there are many rebates available for conservation investments around your home or business. Visit or contact your local water provider for more information.

Arroyo Seco Calendar

Your guide to special events related to the Arroyo Seco, the Los Angeles River,
the San Gabriel Mountains, and key environmental issues in our region.

Sat, May 17
Landscape Preparation & Design Class
9 – 11am
South Pasadena Council Chambers, 1424 Mission Ave, South Pasadena 91030
Learn how to remove your lawn and make over your yard with water wise plants at this informative workshop hosted by the City of South Pasadena. RSVP: 626-403-7311 or
Water Wise Plants & Irrigation
11am – 1pm
South Pasadena Council Chambers, 1424 Mission Ave, South Pasadena 91030
Learn about water wise plants and how to irrigate them efficiently at this informative workshop hosted by the City of South Pasadena. RSVP: 626-403-7311 or
Sun, May 18
Museums of the Arroyo Day
12 – 5pm
Multiple locations in Los Angeles and Pasadena
Great architecture, family fun, historical discoveries and a day in the sun — it's all free when the Museums of the Arroyo (MOTA) Day celebrates 25 years on May 18, 2014. In addition to the annual free open house of museums, tours, music, storytelling, arts, crafts and entertainment, this year, MOTA Day museums will collectively participate in the From "Out of the Vault" exhibit which will showcase an item that has rarely been on display or ever seen by the public.
Sun, June 1
Lummis Day 9
10am – 6pm
Lummis Home & Heritage Square Museum, Los Angeles 90031
Lummis Day celebrates the arts, history and ethnic diversity of Northeast Los Angeles through educational and cultural events and an annual festival that draws the community together for a shared experience while providing a platform for cooperation among people of all ages and backgrounds. The Lummis Day festival is a free community celebration bridging two historic locations.
Thu, June 5
DamNation Screening
7:30 – 10:30pm
Patagonia, 47 W. Fair Oaks Dr, Pasadena 91103
Enjoy a special courtyard screening of DamNation presented by Patagonia Pasadena, with Arroyo Seco Foundation on hand to discuss local dams and their impacts in the Arroyo Seco watershed.
Tue, June 10
Stream Team Meeting
7:00 – 8:30pm
Pasadena Humane Society, 361 S. Raymond Ave, Pasadena 91105
Join us for our monthly meeting of volunteers and supporters. This month's meeting will feature a special presentation by Katie VinZant of the U.S. Forest Service on Station Fire recover and invasive species management in the Arroyo Seco watershed.

News of the Arroyo

An archive of news stories about and related to life in the Arroyo Seco.

Click on the title link to read the entire story.

Supreme Court finds Los Angeles County liable for stormwater pollutionMay 5, 2014 — The US Supreme Court refuses to hear LA County's appeal of a judicial determination that it is responsible for cleaning up local waterways from polluted stormwater runoff.
5 Dramatic Ways California Is Tackling DroughtMay 6, 2014 — California's current drought is not the state's driest spell on record in terms of total precipitation. If the state feels this drought as a particularly severe one, says Peter Gleick, the blame may fall partly on humans.
Pasadena Council approves Devil's Gate Dam sediment removal recommendationsMay 12, 2014 — Pasadena has taken a strong stand, telling LA County Flood Control District that it will insist on a sediment management program for Hahamongna Watershed Park that emphasizes reduced impacts and sustainability.
Rip out your lawn, get paid double, says drought-minded Metropolitan Water DistrictMay 14, 2014 — The incentive for removing turf from your year and for rain barrels and high-efficiency toilets will soon be doubled by Metropolitan Water District in respeonse to the current severe drought.

Arroyo Seco Foundation
Los Angeles River Center, 570 W. Avenue 26 #450, Los Angeles, CA 90065
PO Box 91622, Pasadena, CA 91109
(323) 405-7326 |

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