Planning | Arroyo Seco Foundation

Upper Los Angeles River and Tributaries - Arroyo Seco Section

This plan, developed by a working groups of publc officials and stakeholders, identifies opportunities on the six major tributaries of the Upper Los Angeles River, including a major section on the Arroyo Seco, which is contained in this document.

River Rangers

The is the plannng document for the development of a coordinated Los Angeles River Ranger program that would provide safety and educational services for the river, including the Arroyo Seco.

The Los Angeles River Ecosystem Restoration Feasibility Study - 2016

This page contains the official documents of the Los Angeles River restoration program sponsored by the City of Los Angeles and the US Army Corps of Engineers and adopted by the LA City Council on June 29, 2016. A major element of the plan is a large habitat restoration program at the Arroyo Seco Confluence with the LA River.

Cornfields Arroyo Seco Specific Plan - 2014

This is the first river-friendly specific plan adopted by the City of Los Angeles. It was adopted by the Los Angeles City Council on July 2, 2014.

Southwest Hahamongna Preliminary Habitat Assessment (2012)

This habitat assessment of the critical southwest portion of Hahamongna Watershed Park was conducted by ASF staff and volunteers in 2012.

South Pasadena's Arroyo Seco Pedestrian and Bicycle Trail

South Pasadena had developed an extension of the Arroyo Seco bike trail, from the South Pasadena Nature Park to Stoney Drive. This is the original design which includes a plan to link the new trail with the existing one in the Arroyo Seco channel below the York Bridge.

Historic Arroyo Seco Parkway
Corridor Partnership Plan (2012)

The Corridor Partnership plan is an advisory document regarding the Arroyo Seco Byway Corridor.

Los Angeles County Bicycle Master Plan (2012)

Here is the disappointing 2012 County Bicycle Plan that fails to consider and Arroyo Seco bikeway.

Integrated Spreading Grounds Alternatives 2012

CDM prepared this evaluation of the best management alternatives for the Spreading Basins in Hahamongna. Three alternatives are discussed. The recommendation alternative is "Enhanced Alluvial Fan and Stream Restoration and Water Supply Repairs and Improvements."

Arroyo Seco Watershed Ecosystem Restoration Study (2011)

This study was conducted by the US Army Corps of Engineers in coordination with the Los Angeles County Department of Public Works to evaluate opportunities for restoring ecosystem function along the Arroyo Seco River from the Angeles National Forest border to approximately 0.5 miles from its confluence with the Los Angeles River.

Arroyo Seco Watershed Assessment (2011)

The Arroyo Seco Watershed Assessment, prepared by CDM-Smith for the Arroyo Seco Foundation, reviews key restoration projects in the watershed and identifies five major projects that constitute an Arroyo Seco Greenway. It was designed to propose projects and approaches for the USACE Arroyo Seco Ecosystem Restoration Program.

Roadmap for Large-Scale Ecosystem Restoration in the Arroyo Seco (2011)

This is a short but comprehensive guide to restoring the ecosystemos of the Arroyo Seco Watershed, prepared by Wendy Katagi and Steve Johnson of CDM and Tim Brick of the Arroyo Seco Foundation.

Pasadena Water Integrated Resources Plan (2011)

This is the water resources plan adopted for the Pasadena Water & Power Department in 2011.

Raymond Basin Groundwater Action Plan (2010)

Tim Brick developed this report on how to improve the management of the Raymond Basin for the Arroyo Seco Watershed Sustainability porgram in 2010.

Los Angeles River Revitalization Master Plan (2007)

The City of Los Angeles' Los Angeles River Revitalization Master Plan, completed in 2007, aims to enhance existing communities by creating a safe environment with more open space, parks, trails, recreation, environmental restoration, riverfront living and commerce, new jobs, neighborhood identity, economic development, tourism, and civic pride.

Arroyo Seco Watershed
Management and Restoration Plan (2006)

This plan was put together by the Northeast Trees and evaluates potential for water quality improvements and watershed management techniques. The plan provides preliminary details for a variety of restoration projects.

Army Corps of Engineers Arroyo Seco Project Management Plan (2005)

Click here for more information on the US Army Corps of Engineers Arroyo Seco Watershed Feasibility Study.

USGS Confluence Park Study (2005)

This report identifies the most important geologic, hydrologic, and biologic issues related to the development of an urban park at the confluence of the Los Angeles River and Arroyo Seco and presents a set of proposed work tasks to address these issues.

Connecting Communities: Improving Cycling Within the Arroyo Seco Corridor (2005)

Northeast Linkages Phase 5 Pedestrian and Bicycle Circulation (2005)

Arroyo Seco Parkway Corridor Management Plan (2004)

Arroyo Seco Water Resources Issues (2004)

This report on water resources in the Arroyo Seco Watershed was a partnership between the Arroyo Seco Foundation and North East Trees as part of the CALFED Arroyo Seco Watershed Management Plan & Education Program.

Hahamongna Watershed Park Master Plan (2003)

The Hahamongna Watershed Park Master Plan illustrates a vision for the 300-acres of open space that extends from Devil's Gate Dam north and into the Arroyo Seco Canyon, on the northwestern edge of the city. The Hahamongna Watershed Park Master Plan was adopted to establish a visionary framework for recreation, water resources, flood management, habitat restoration and cultural resources in this area.

Pasadena Arroyo Seco Master EIR (2003)

This is Pasadena's long-awaited Arroyo Seco Master Plan with detailed concepts for the Lower Arroyo, Central Arroyo and Hahamongna along with special sections on the Rose Bowl and Arroyo Seco guidelines.

McKenney on Arroyo Seco Master Plan (2002)

Former City Director and Arroyo advocate Charles McKenney summarizes the long history of Arroyo preservationa and the concerns of many about the weaknesses of Pasadena Arroyo Seco Master Plan. "Fifteen years of discussion and public participation have raised the hope that the long awaited Arroyo Seco Master Plan would reflect Pasadena's historic emphasis on preserving and protecting the natural state of the Arroyo. This, regrettably, has not come about."

Lower Arroyo Master Plan(2000)

The Lower Arroyo Master Plan covers the section of the Arroyo Seco in Pasadena that extends from the Colorado Street Bridge to the border with South Pasadena. The Lower Arroyo Master Plan was adopted to establish a visionary framework for recreation, water resources, flood management, habitat restoration and cultural resources in this area. It was inspired by a remarkable plan from CalPoly graduate student in 1988 that envisioned a naturalization of the area with a living stream. It was prepared in 2000 and officially included in the Arroyo Seco Master plan when it was approved by the Pasadena City Council in 2003.

Arroyo Seco Watershed Reconnaissance Study (2002)

This study by the US Army Corps of Engineers established a federal interest in the Arroyo Seco Watershed.

Arroyo Seco Watershed Restoration Feasibility Study (2001)

This was among the first in the watershed management plans that emphasized the restoration of natural hydrology and native habitat in California. It was compiled by North East Trees and the Arroyo Seco Foundation with funding from the California Coastal Conservancy and the Santa Monica Mountains Conservancy.

Arroyo Seco Planning Documents

Here you will find information on different studies and plans related to the Arroyo Seco Watershed. For a historic overview of planning in the Arroyo Seco Watershed, see the Arroyo Planning Timeline.