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Library
Learn more about the research and development of the Topanga Lagoon Restoration project by perusing the resources on this page.
Landowner Websites
Topanga Lagoon Restoration Project
Final Environmental Impact Report (FEIR) Available
Access the FEIR
The FEIR for the Topanga Lagoon Restoration Project has officially been certified and the Preferred Hybrid Alternative 3A approved by California State Parks with the support of project stakeholders. The FEIR builds upon the information presented in the Draft Environmental Impact Report (DEIR) and both documents should be considered to fully understand the proposed project.
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A digital version of the FEIR is available HERE.
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The associated Appendices for the FEIR can be accessed HERE.
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The Notice of Determination (NOD) is located HERE.
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Review a recording of the 8/5/24 Proposed FEIR & Preferred Alternative Public Meeting
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DEIR
A digital version of the DEIR is available HERE.
The associated Appendices for the DEIR can be accessed HERE.
The associated letter to the State Clearing House is located HERE.
2/24/24 Public Meeting #1, Annenberg Beach House
2/28/24 Public Meeting #2, Topanga Community House
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Questions?​​
Reach out to us on our Stay Connected page.
Presentations
Research & Publications
Recent research associated with the Topanga Lagoon restoration project and onsite resources are listed below by category with the most recent publications listed first.
Project Specific Environmental Documents
Topanga Creek Restoration: Rodeo Berm Removal
Dagit, R. 2009. Topanga Creek Restoration: Rodeo Berm Removal. Urban Coast Vol 1 (1):37-41 November 2009.
Project Study Report: Topanga Canyon Blvd Narrows Roadway and Tunnel
Caltrans 2004. Project Study Report (Project Development Support) TOPANGA CANYON BLVD NARROWS ROADWAY AND TUNNEL. Prepared by Moffatt and Nichols Engineers for the RCD of the Santa Monica Mountains. Funded by a grant from the California Coastal Conservancy.
Project Study Report: Topanga Lagoon Bridge Replacement and Lagoon Restoration
Caltrans 2004. Project Study Report (Project Development Support) TOPANGA LAGOON BRIDGE REPLACEMENT AND LAGOON RESTORATION. Part 1. Part 2. Prepared by Moffatt and Nichols Engineers for the RCD of the Santa Monica Mountains. Funded by a grant from the California Coastal Conservancy.
Technical Memorandum: Topanga Lagoon Restoration Project Preliminary Soils Investigation
Moffatt and Nichols Engineers. 2003. Technical Memorandum: Topanga Lagoon Restoration Project Preliminary Soils Investigation, Los Angeles County, California.
Initial Site Assessment Report Topanga Lagoon Restoration, Topanga, California
GeoPentech, 2003. Initial Site Assessment Report Topanga Lagoon Restoration, Topanga, California. Prepared for Moffat & Nichol Engineers.
Topanga Creek Watershed and Lagoon Restoration Feasibility Study
Dagit, R. and C. Webb. 2002. Topanga Creek Watershed and Lagoon Restoration Feasibility Study. Resource Conservation District of the Santa Monica Mountains, Topanga, CA.
Topanga Creek Watershed Management Plan
Dagit, R. editor. 2002. Topanga Creek Watershed Management Plan. Topanga Creek Watershed Committee, Topanga, CA.
Water Quality Reports & Publications
Topanga Source Identification Study Final Report December 2012-August 2014
Dagit, R., J. Krug, K. Adamek, E. Montgomery, C. Garcia, S. Albers, J.A. Jay, T. Riedel, A. G. Zimmer-Faust, V. Thulsiraj, C. Marambio, S. Braband, D. Tufto and R. Sherman. 2014. Topanga Source Identification Study Final Report December 2012-August 2014. Prepared by the Resource Conservation District of the Santa Monica Mountains for Los Angeles County. Topanga, CA.
Long-term Molecular Marker Monitoring in the Topanga Creek Watershed
Riedel, T., V. Thulsirag, A. G. Zimmer-Faust, R. Dagit, J. Krug, K. T. Hanley, K. Adamek, D. L. Ebentier, R. Torres, U. Cobian, S. Peterson, and J.A. Jay. 2015. Long-term Molecular Marker Monitoring in the Topanga Creek Watershed, CA. USA, Suggests That Coastal Fecal Indicator Bacteria are from Multiple Animal Hosts, Each with a Different Seasonal Pattern. Water Research 71:227-243.
Hydrogeologic Study, Lower Topanga Creek Watershed, Los Angeles County, California
GeoPentech, 2006. Hydrogeologic Study, Lower Topanga Creek Watershed, Los Angeles County, California. Prepared for the RCD of the Santa Monica Mountains. Funded by a grant from the California Coastal Conservancy.
Topanga Creek Watershed Water Quality Study Final Report
Dagit, R., S. Williams and J. Fuhrman. 2004. Topanga Creek Watershed Water Quality Study Final Report. Resource Conservation District of the Santa Monica Mountains, December, 2004.
Steelhead Trout
Temporal and Volumetric Characteristics of Lagoons in the Santa Monica Bay and the Passage Implications for Southern Steelhead Trout
Alvarez, D. and R. Dagit. 2019. Temporal and Volumetric Characteristics of Lagoons in the Santa Monica Bay and the Passage Implications for Southern Steelhead Trout. Bulletin of the Southern California Academy of Sciences 118(3):1-27.
Occurrences of Steelhead Trout (Oncorhynchus mykiss) in Southern California, 1994-2018
Occurrences of Steelhead Trout (Oncorhynchus mykiss) in Southern California, 1994-2018: published in the California Fish and Wildlife Journal, vol. 106(1)
The Effects of a Prolonged Drought on Southern Steelhead Trout
Dagit, Rosi; Bell, Ethan; Adamek, Krista; Mongolo, Jennifer; Montgomery, Elizabeth; Trusso, Nina; and Baker, Peter (2017) “The Effects of Prolonged Drought on Southern Steelhead Trout (Oncorhynchus mykiss) in a coastal creek, Los Angeles County, California,” Bulletin of the Southern California Academy of Sciences: Vol. 116: Iss. 3.
Juvenile Growth of a Population of Southern California Steelhead Trout
Bell E., S. M. Albers, J. M. Krug, and R. Dagit. 2011. Juvenile Growth of a Population of Southern California Steelhead Trout (Oncorhychus mykiss). California Fish and Game Bulletin 97(1):25-35.
Environmental Factors Controlling a Persistent Population of Southern California Steelhead
Bell, Dagit and Lignon. 2011. Environmental Factors Controlling a Persistent Population of Southern California Steelhead (Oncorhychus mykiss). Bulletin of the Southern California Academy of Sciences No 110 (1):1-16.
Die Off and Current Status of Southern Steelhead Trout (Oncorhynchs mykiss) in Malibu Creek, Los Angeles County, USA
Dagit, R., S. Adams and S. Drill. 2009. Die Off and Current Status of Southern Steelhead Trout (Oncorhynchs mykiss) in Malibu Creek, Los Angeles County, USA. Southern California Academy of Sciences Bulletin Vol 108(1):1-15.
Other Biological/Environmental Documents
Removal Efforts and Ecosystem Effects of Invasive Red Swamp Crayfish (Procambarus clarkii) in Topanga Creek
Garcia, C., E. Montgomery, J. Krug and R. Dagit. 2015. Removal Efforts and Ecosystem Effects of Invasive Red Swamp Crayfish (Procambarus clarkii) in Topanga Creek, California. Bulletin of the Southern California Academy of Sciences. Vol 114(1):12-21.
Evidence for Negative Effects of Drought on Benthic Macroinvertebrate Community of a Southern California Stream
Montgomery, E., C. Garcia, K. Krug, and R. Dagit. 2015. Evidence for Negative Effects of Drought on Benthic Macroinvertebrate Community of a Southern California Stream. Bulletin of the Southern California Academy of Sciences Vol 114(3):129-140.