The SuAsCo CISMA (Cooperative Invasive Species Management Area) is a partnership of organizations that intend to manage and control invasive species defined by the geography of the Sudbury, Assabet, and Concord (SuAsCo) watershed. Thirty-six towns are part of the SuAsCo Watershed, and we are all connected by the Sudbury, Assabet, and Concord river system. The watershed covers approximately 377 square miles and includes a variety of upland habitats, wetland habitats, historic sites, scenic sites and recreational areas. The towns, state and federal government agencies, and environmental organizations that hold land in the watershed all share an interest in the work of the CISMA.

Cisma Map

What are invasive species?

  • Any plant or animal that is not native to an area.
  • Able to reproduce without any natural checks on population growth and can out-compete native organisms.
  • Invasive species begin to fill the ecological roles of native species and in short order can entirely replace native species.

Wild and Scenic

In April 1999 Congress designated 29 miles of the Sudbury, Assabet, and Concord Rivers as Wild and Scenic for their outstanding ecology, history, scenery, recreation values, and place in American literature. The designated reach includes: the 14.9-mile segment of the Sudbury River beginning at the Danforth Street Bridge in Framingham, downstream to the Route 2 bridge in Concord, and the 1.7-mile segment of the Sudbury River from the Route 2 bridge downstream to its confluence with the Assabet River at Egg Rock; the 4.4-mile segment of the Assabet River beginning 1,000 feet downstream from the Damonmill Dam in West Concord, to its confluence with the Sudbury River at Egg Rock in Concord; and the 8-mile segment of the Concord River from Egg Rock at the confluence of the Sudbury and Assabet Rivers downstream to the Route 3 bridge in Billerica.

Designating a river as “wild and scenic” does not halt use of a river; instead, the goal is to preserve the character of a river. Uses compatible with the management goals of a particular river are allowed; change is expected to happen. However, development must ensure the river’s free flow and protect its “outstandingly remarkable resources.” The intent of Congress was to create a national system of protected rivers that co-existed with use and appropriate development. Each river designation is different, and each management plan is unique. Over 156 rivers in the U.S. have been given the Wild and Scenic designation.

To learn more about Wild and Scenic Rivers Act and the SuAsCo Watershed, please visit The Sudbury, Assabet, and Concord Wild & Scenic River Stewardship Council.

Upcoming Events

Fall Meeting

Tuesday, November 10, 2020
2:00 pm to 4:00 pm

SuAsCo CISMA Fall Meeting 2pm to 4pm Details coming soon. Read more

Wayland Volunteer Day

Saturday, November 21, 2020
10:00 am to 11:30 am

The Wayland Conservation Department is looking for volunteers to help with invasive species management projects on town owned conservation property. Volunteer work days will take place on the third Saturday... Read more

Recent News

Nyanza support letter

February 1, 2012

Read or download Nyanza letter Read more

Group details top Nyanza restoration proposals

January 3, 2012

By Laura Krantz/Daily News staff MetroWest Daily News Read at: Read more

2011 SuAsCo CISMA Annual Fall Meeting

November 9, 2011

November 8, 2011 3 pm – 5 pm The Annual Fall meeting was held at the Assabet River National Wildlife Refuge Visitor Center, 680 Hudson Road, Sudbury, MA 01776 Read more

SuAsCo CISMA in the News

October 3, 2011

Volunteers, Beetles go after invasive plants March Membership Meeting of SuAsCo CISMA 20 Conservation Partners Establish SuAsCo CISMA Read more