Any alteration of land bordering waters is regulated by state law. A well defined procedure must be followed before any action is taken. The law can be found at:
http://www.mass.gov/legis/laws/mgl/131-40.htm
For more information or to initiate the permit process, contact the Sudbury Conservation Commission. The Conservation Commission website can be found at:
http://www.town.sudbury.ma.us/committees/committee_home.asp?dept=ConservationCommission