The 755 Walden Street Compost Site will open at 9:00AM on Saturday, December 17th and will close at 12:00 due to inclement weather. Christmas trees, Styrofoam™ blocks, and Christmas tree lights may be brought to the compost site between 9:00AM-3:00PM on Saturday, December 31 and Saturday, January 7. Residents can also bring Christmas trees to the compost site on Friday, December 30 and Friday, January 6 between 9-3. Call Concord Public Works at 978-318-3240 for questions.