Advance Mitigation


Accessibility Assistance: Caltrans makes every attempt to ensure our documents are accessible. Due to variances between assistive technologies, there may be portions of this document which are not accessible. Where documents cannot be made accessible, we are committed to providing alternative access to the content. Should you need additional assistance, please contact us at (916) 654-2852 or visit Request ADA compliant Documents 

Stay Informed

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.

The Master Process Agreement for Planning and Developing Advance Mitigation throughout California for the California Department of Transportation Advance Mitigation Program (2020) between Caltrans, California Department of Fish and Wildlife, California State Water Resources Control Board, U.S. Army Corps of Engineers, Los Angeles District, Sacramento District, and San Francisco District, the U.S. Environmental Protection Agency, U.S. Fish and Wildlife Service, the National Marine Fisheries Service, and the California State Coastal Commission is available by request. The purpose of the Master Process Agreement is to perform the collaboration established in the 2016 SAMI MOU and establish a framework for incorporating natural resource regulatory review, expertise, and guidance into planning, development, advancement, and tracking of Caltrans’ advance mitigation projects. Please send us an email at to request a copy.

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
 2 Klamath Mountains Ecoregion Section Overlapping Caltrans District 2   Draft  Oct 2022 Email us at for a link to download the draft. Comments due: November 3rd, 2022.
 2  Southern Cascades Ecoregion Section Overlapping Caltrans District 2  Draft  Oct 2022 Email us at for a link to download the draft. Comments due: November 3rd, 2022.
10 Great Valley Ecoregion Section within Caltrans District 10 Final Jul 2022 Final (PDF)
Appendices (PDF)
4 Gualala-Salmon, San Pablo Bay, and Tomales-Drake Bays Sub-basins  RAMNA Final Jun 2022

Final (PDF)
Appendices (PDF) 

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 Jul 2021 Final (PDF)
Appendices (PDF)
5 Central Coastal, Monterey Bay, Pajaro, Salinas, and San Francisco
Coastal South Sub-basins RAMNA
Final Jun 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