Advance Mitigation


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The Caltrans Advance Mitigation Program’s 2nd Annual Virtual Meeting Begins on May 26th!

Register HERE and come with questions about our Program!

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Subscribe to the Advance Mitigation Announcement mailing list to receive future Caltrans Advance Mitigation Program updates.

Any questions or comments? Please send us an email at

Program Overview

The Caltrans Advance Mitigation Program (Program) was established by the Road Repair and Accountability Act of 2017 authorizing Caltrans to plan and implement advance mitigation solutions for its future transportation projects. This new business practice allows Caltrans to reduce delays by proactively obtaining environmental mitigation in advance of - rather than during - transportation projects. The Caltrans Division of Environmental Analysis (DEA) administers the Program and supports Caltrans Districts interested in planning and delivering advance mitigation projects.

The primary goal of the Program is to address longer-term future environmental mitigation needs resulting in improved environmental, economic and project delivery outcomes. By consolidating the forecasted mitigation needs of multiple future transportation projects, Caltrans can potentially provide strategically placed and environmentally sound replacement habitat and shorten project delivery timelines, resulting in both time and cost savings. Ultimately, the Program aims to help Caltrans meet conservation goals in addition to regulatory requirements.


  • Accelerate transportation project delivery
  • Improve environmental outcomes
  • Enhance communication with stakeholders and California Department of Fish & Wildlife
  • Ensure that the Program account is self-sustaining


Planning and implementation of the Program is a collaboration effort between Caltrans and its twelve Districts as well as the California Department of Fish and Wildlife. In addition, Caltrans regularly consults with agency partners such as the California State Water Resource Control BoardU.S. Army Corps of Engineers South Pacific DivisionU.S. Environmental Protection AgencyU.S. Fish and Wildlife Service, the California Coastal Commission, and National Marine Fisheries Service on how to apply the U.S. Department of Transportation Federal Highway Administration Eco-Logical vision on infrastructure development and ecosystem conservation integration in order to harmonize economic, environmental, and social needs and objectives.

The 2021 Statewide Advance Mitigation Memorandum of Understanding (PDF) between Caltrans and the above resource agencies outlines the collaborative effort involved in the planning and implementation of the Program.

Guidelines and Procedures

On-Demand Training

Fact Sheets

Statewide Advance Mitigation Needs Assessment (SAMNA) Reports

Regional Advance Mitigation Needs Assessment (RAMNA) Reports


Lead Caltrans District Name Status Version Date Documents
10 Great Valley Ecoregion Section within Caltrans District 10 Draft – Public and interested party comments due April 14, 2022 Mar 2022 Request download instructions from
4 Gualala-Salmon, San Pablo Bay, and Tomales-Drake Bays Sub-basins  RAMNA Draft - The public and interested party review period is closed  Feb 2022

Request download instructions from

9 Six Northern Mojave Sub-basins and the Owens Lake Sub-basin Within California RAMNA Final Apr 2022

Final (PDF)
Appendices (PDF) 

3 Lower Sacramento Basin RAMNA Final Jan 2022
Final (PDF)
Appendices (PDF) 
7 Thirteen Ecoregion Subsections of the Southern California
Coast and Southern California Mountains and Valleys RAMNA
Final Dec 2021 Final (PDF)
Appendices (PDF) 
1 Mad-Redwood, Lower Eel, and South Fork Eel Sub-basins RAMNA Final July 2021 Final (PDF)
Appendices (PDF)
5 Central Coastal, Monterey Bay, Pajaro, Salinas, and San Francisco
Coastal South Sub-basins RAMNA
Final June 2021 Final (PDF)
Appendices (PDF) 
6 Great Valley EcoRegion Section RAMNA Final Dec 2020 Final (PDF)
Appendices (PDF) 
8 Mojave Desert Section RAMNA Final Aug 2020 Final (PDF)
Appendices (PDF) 

Program Reports