Established by the Wetlands and Waterways Program, Circuit Riders promote fair, consistent and environmentally sound wetland permitting by the 351 local conservation commissions in the state. Circuit Riders accomplish these goals by offering technical, administrative, and regulatory assistance on numerous wetland topics to hundreds of commissions, municipal boards, and consultants each year. In 2011 the Program and its Circuit Riders were honored with the prestigious Massachusetts Association of Conservation Commission’s Environmental Service Award for the exemplary work that they do.

Commissions should look here for upcoming training opportunities. Any other questions should be directed to your regional Circuit Rider or Nancy Lin (see below). 

Regional Circuit Riders
Upcoming Workshops

Get to Know Your Regional Circuit Rider

photo of Nancy Lin

Nancy Lin is the Wetland Circuit Rider Coordinator and created the Circuit Rider Program in 1995. Since 1988 Nancy has overseen the outreach and training for MassDEP's Wetlands and Waterways Program, as well as writing and managing grants that forward wetlands/waterways programmatic goals. As a certified Professional Wetlands Scientist (PWS), Nancy has developed, produced and implemented many of the Program's technical, regulatory and general outreach/training efforts. Prior to MassDEP, Nancy was the Director of the City of Cambridge's Conservation Commission; managed natural history and staff training for the New York City Park Ranger program; and was a naturalist/teacher at a NYC Environmental Education Landmark - High Rock Park Conservation Center. In addition to responding to overall Circuit Rider inquiries, Nancy answers technical and regulatory questions from commissions in MassDEP's Central Region. She can be reached at 617-556-1109 or


photo of Christine Odiaga

Christine Odiaga is the Circuit Rider for the Southeast Regional Office and the satellite office on Cape Cod. She has a BS in Biology and minor in Marine Studies from Northeastern University, and worked as Conservation Agent in two municipalities. Christine did NPDES field work on the Central Artery/Tunnel project for six years, which included revising the Best Management Practices section of the Storm Water Pollution Prevention Plan, and served as President of the Northeast Chapter of the International Erosion Control Association from 2005-2009. You can reach Christine at 508-946-2836 (in Lakeville) or 508-771-6117 (in Hyannis) or


photo of Mark Stinson

Mark Stinson is a Circuit Rider for the Western Regional Office. Mark holds a Bachelor of Science degree from the Massachusetts Maritime Academy and has also taken Masters level courses in Forestry Management at the University of Massachusetts in Amherst. He has over 13 years of experience at the conservation commission level as a commissioner, chair and agent for a Western Massachusetts community. Mark can be reached at, 413-755-2257 or


photo of Pamela Merrill

Pamela Merrill is the Circuit Rider for the Northeast Regional Office. Pamela is currently enrolled in the UNH Wetland Certification Program where she is working towards becoming a Certified Wetland Scientist in New Hampshire. She has five years of experience working as an agent for two North Shore Conservation Departments. Pamela also has experience working in the private sector, working with an environmental consulting company as an Associate Wetland Scientist. Reach Pamela at 978-694-3249 or


  Wetland Circuit Rider Program 2013 Accomplishments in Review pdf format of Circuit Rider Program 2013 Accomplishments


Upcoming Workshops

Revisions to MassDEP Wetlands, Waterways, and Water Quality Certification Regulations

After more than two years of extensive work reviewing and incorporating public comments, receiving input from advisory committees and other stakeholders, MassDEP will be promulgating wetlands and waterways regulatory revisions in early 2014. Prior to the effective date, application forms will be revised. Contact your Regional Wetland Circuit Rider for more information and plan to attend one of these informational workshops.

April 14, 1:00 p.m. - 3:00 p.m., MassDEP Southeast Regional Office, Main Conference Room, 20 Riverside Drive, Lakeville
April 15, 1:00 p.m. - 3:00 p.m., MassDEP Western Regional Office, 3rd floor Courtroom (NO food or drinks allowed), 436 Dwight Street, Springfield
April 16, 1:00 p.m. - 3:00 p.m., MassDEP Central Regional Office, Main Conference Room, 627 Main Street, Worcester
April 17, 1:00 p.m. - 3:00 p.m., Billerica Public Library, Meeting Room, 15 Concord Road, Billerica

Pre-registration is required for certain regions and should be directed to the appropriate Wetland Circuit Rider for that region. More upcoming Regulatory Revision workshops will be scheduled in the next few months and can be found on this web page.

Pre-register for the April Regulatory Revision Workshops in the following regions:


Pre-registration is not required for the Western Region.