Part of the group of about 100 people stood in front of sand trucks for over one hour preventing their movement. Group spokesperson Molly Greening of the Catholic Worker Movement said they wanted to shut down operations.
Police Chief Paul Bostrack said those arrested were charged with tresspassing on the CD Corporation property and were taken to the law enforcement center where they were to be released.
A second simultaneous protest was being held at the sand washing facility along Highway 14 that is owned by Robert Hemker of Winona. Members of the local citizens group opposed to frac sand mining participated at both locations.
Bostrack said all on-duty police officers, including investigators, were at the harbor, along with many sheriff's deputies and the Minnesota State Patrol.