Caltrans to Hold Free Dump Day for Butte County on Saturday, February 18 in Chico from 8 a.m. to 3 p.m. at the Chico Maintenance Station 2535 Notre Dame Blvd . - Caltrans will have maintenance staff on site to accept non-hazardous household waste and other approved debris at no charge. Other acceptable items include household appliances and mattresses.